Articles de revues : « Environmetal remediation »

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Nascimento, R. S., J. A. M. Corrêa, B. A. M. Figueira, P. A. Pinheiro, J. H. Silva, P. T. C. Freire et S. Quaranta. « From mining waste to environmetal remediation : a nanoadsorbent from Amazon bauxite tailings for the removal of erythrosine B dye ». Applied Clay Science 222 (juin 2022) : 106482. http://dx.doi.org/10.1016/j.clay.2022.106482.

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Bajda, Tomasz. « Solubility of mimetite Pb5(AsO4)3Cl at 5 - 55°C ». Environmental Chemistry 7, n^o 3 (2010) : 268. http://dx.doi.org/10.1071/en10021.

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Environmetal context.The mobility of toxic arsenic compounds in the environment can be controlled by the solubility of certain minerals. To predict and model the fate and behaviour of these contaminants, the solubility and related thermodynamic properties of the lead and arsenic mineral mimetite were determined. The data obtained in this study will be used to optimise and increase the effectiveness of remediation procedures that are already applied to contaminated sites. Abstract.The solubility of the synthesised mimetite was measured in a series of dissolution experiments at 5–55°C and at pH values between 2.00 and 2.75. The solubility product logKSP for the reaction Pb5(AsO4)3Cl ↔ 5Pb2+ + 3AsO43– + Cl– at 25°C is –76.35 ± 1.01. The free energy of formation ΔGf,2980 calculated from this measured solubility product equals –2634.3 ± 5.9 kJ mol–1. The temperature dependence of the logKSP is non-linear, indicating that the enthalpy of the reaction depends on the temperature. The enthalpy of the formation of mimetite ΔHf0, is –2965.9 ± 4.7 kJ mol–1, the entropy, ΔS0, is 39.5 J mol–1 K–1, and the heat capacity, ΔCp,f0 is –6172 ± 105 J mol–1 K–1. Hydrochemical modelling indicates that regardless of the composition of the background solution, Pb5(AsO4)3Cl is most stable at neutral to weakly alkaline pH.

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Alazaiza, Motasem Y. D., Ahmed Albahnasawi, Gomaa A. M. Ali, Mohammed J. K. Bashir, Nadim K. Copty, Salem S. Abu Amr, Mohammed F. M. Abushammala et Tahra Al Maskari. « Recent Advances of Nanoremediation Technologies for Soil and Groundwater Remediation : A Review ». Water 13, n^o 16 (10 août 2021) : 2186. http://dx.doi.org/10.3390/w13162186.

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Nanotechnology has been widely used in many fields including in soil and groundwater remediation. Nanoremediation has emerged as an effective, rapid, and efficient technology for soil and groundwater contaminated with petroleum pollutants and heavy metals. This review provides an overview of the application of nanomaterials for environmental cleanup, such as soil and groundwater remediation. Four types of nanomaterials, namely nanoscale zero-valent iron (nZVI), carbon nanotubes (CNTs), and metallic and magnetic nanoparticles (MNPs), are presented and discussed. In addition, the potential environmental risks of the nanomaterial application in soil remediation are highlighted. Moreover, this review provides insight into the combination of nanoremediation with other remediation technologies. The study demonstrates that nZVI had been widely studied for high-efficiency environmental remediation due to its high reactivity and excellent contaminant immobilization capability. CNTs have received more attention for remediation of organic and inorganic contaminants because of their unique adsorption characteristics. Environmental remediations using metal and MNPs are also favorable due to their facile magnetic separation and unique metal-ion adsorption. The modified nZVI showed less toxicity towards soil bacteria than bare nZVI; thus, modifying or coating nZVI could reduce its ecotoxicity. The combination of nanoremediation with other remediation technology is shown to be a valuable soil remediation technique as the synergetic effects may increase the sustainability of the applied process towards green technology for soil remediation.

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Wang, Yu, Feng Pan, Qiong Wang, Jie Luo, Qin Zhang, Yingying Pan, Chenliang Wu et Wei Liu. « The Effect of Different Remediation Treatments on Soil Fungal Communities in Rare Earth Tailings Soil ». Forests 13, n^o 12 (24 novembre 2022) : 1987. http://dx.doi.org/10.3390/f13121987.

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Extensive mining of rare earth deposits has caused severe soil erosion, resulting in the degradation of plant–soil systems and the reduction in microbial diversity. Combined ecological remediation technology is the key method of vegetation reconstruction and ecological restoration in abandoned tailings. In this study, the effects of different cover crops–biochar–organic fertilizer and biochar–organic fertilizer treatments on soil fungal communities in rare earth tailings soil were analysed using high-throughput sequencing technology. Linear discriminant analysis effect size (LEfSe) was used to analyse saprophytic, mycorrhizal, and potential pathogenic fungi in soils after different combined remediations. Moreover, the effects of soil environmental factors on fungal community species’ composition were analysed by redundancy analysis (RDA) and variance partitioning analysis (VPA) after different combined remediations. LEfSe indicated a risk of citrus pathogenicity by Diaporthaceae indicator fungi after biochar–organic fertilizer combined treatment. RDA and VPA revealed that pH was the main environmental factor affecting the fungal community in the different combined remediation treatments. Additionally, the Paspalum wettsteinii cover crops–biochar–organic fertilizer and biochar–livestock manure treatments were more conducive to arbuscular mycorrhizal fungi recruitment. We also clarified the fungal community composition structure, soil environmental factors, and fungal community relationships in rare earth tailings soil after different combined remediation treatments.

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Huysegoms, Lies, Sandra Rousseau et Valérie Cappuyns. « Chemical or Natural ? Including LCA in Social CBA to Compare Remediation Alternatives for a Dry-Cleaning Facility ». Sustainability 11, n^o 7 (3 avril 2019) : 1975. http://dx.doi.org/10.3390/su11071975.

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The choice between remediation alternatives for contaminated sites is complicated by different elements, e.g., the occurrence of multiple contaminants, the extent of the contamination, or the urban location, complicate the choice between remediation alternatives. This paper addresses this challenging choice by analyzing a case study of an extensive soil and groundwater contamination by a dry-cleaning company. For remediating this site, two alternatives were proposed. The first remediation alternative combines several techniques with in-situ chemical oxidization being the most important one. Due to the potential negative impact of this alternative on local residents a second remediation alternative was drawn up, in which the focus lies on the use of stimulated biological degradation. A Life Cycle Assessment (LCA) was performed on both alternatives and showed that the second alternative had a lower environmental impact. The inclusion of monetized LCA results in the calculation of a social Cost-Benefit Analysis (CBA) provided a more extensive view of the secondary environmental costs and benefits of the remediation alternatives. The results of the social CBA allow to conclude that both alternatives are not socially desirable, the chemical alternative however is socially less disadvantageous than the more natural remediation alternative.

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Yarima, A., R. Ali, A. A. Abdullahi et Z. Idris. « Nanotechnology : Review on Emerging Techniques in Remediating Water and Soil Pollutions ». Journal of Applied Sciences and Environmental Management 24, n^o 5 (24 juin 2020) : 933–41. http://dx.doi.org/10.4314/jasem.v24i5.31.

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Environmental Pollution is becoming a global challenge in both developing and the developed countries, pollutants discharge from oil and gas industries and or agricultural practices continue effecting the health of human and other animal in an ecosystem in one way or the other. This necessitated the development of a techniques to clean up of the polluted environment. Remediation of pollutants relies mainly on using varioustechniques like physical, chemical and or biological methods for the removal of contaminants from different environmental media be it soil, water, and or air. These techniques have their own limitations as the toxicity of the degrading agents, time consuming and the fate of the environment after remediation matters a lot. Therefore, nanotechnology is gaining interest in remediating pollutions as nanoparticles are relatively cost effective, sensitive and selective and can be used as sensors to monitor toxins, organic contaminants and heavy metals in land, water and or air. The enhanced properties and effectiveness of nanotechnology-based materials makes them suitable for nano remediation. This review provides an overview of the nanomaterials: Organic based nanomaterials (Dendrimers), inorganic (TiO2, nZVI), carbon-based (Carbon nanotubes, (CNTs)), and composite-based materials) used in environmental remediation. These nanomaterials were reported to remediate different contaminants in theenvironment such as heavy metals, pathogens, pesticides, dyes, chlorinated organic compounds, and polycyclic aromatic hydrocarbons. Keywords: Nanotechnology, nanoparticles, Nano remediation, pollutions and environments.

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Gidudu, Brian, et Evans M. N. Chirwa. « The Role of pH, Electrodes, Surfactants, and Electrolytes in Electrokinetic Remediation of Contaminated Soil ». Molecules 27, n^o 21 (30 octobre 2022) : 7381. http://dx.doi.org/10.3390/molecules27217381.

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Electrokinetic remediation has, in recent years, shown great potential in remediating polluted environments. The technology can efficiently remove heavy metals, chlorophenols, polychlorinated biphenyls, phenols, trichloroethane, benzene, toluene, ethylbenzene, and xylene (BTEX) compounds and entire petroleum hydrocarbons. Electrokinetic remediation makes use of electrolysis, electroosmosis, electrophoresis, diffusion, and electromigration as the five fundamental processes in achieving decontamination of polluted environments. These five processes depend on pH swings, voltage, electrodes, and electrolytes used in the electrochemical system. To apply this technology at the field scale, it is necessary to pursue the design of effective processes with low environmental impact to meet global sustainability standards. It is, therefore, imperative to understand the roles of the fundamental processes and their interactions in achieving effective and sustainable electrokinetic remediation in order to identify cleaner alternative solutions. This paper presents an overview of different processes involved in electrokinetic remediation with a focus on the effect of pH, electrodes, surfactants, and electrolytes that are applied in the remediation of contaminated soil and how these can be combined with cleaner technologies or alternative additives to achieve sustainable electrokinetic remediation. The electrokinetic phenomenon is described, followed by an evaluation of the impact of pH, surfactants, voltage, electrodes, and electrolytes in achieving effective and sustainable remediation.

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Pan, Lixuan, Liangang Mao, Haonan Zhang, Pingping Wang, Chi Wu, Jun Xie, Bochi Yu et al. « Modified Biochar as a More Promising Amendment Agent for Remediation of Pesticide-Contaminated Soils : Modification Methods, Mechanisms, Applications, and Future Perspectives ». Applied Sciences 12, n^o 22 (14 novembre 2022) : 11544. http://dx.doi.org/10.3390/app122211544.

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With the acceleration of the process of agricultural modernization, many pesticides (insecticides, fungicides, and herbicides) are applied to the field and finally brought into the soils, causing serious damage to the environment. The problem of pesticide pollution has become increasingly prominent. This has highlighted the urgent need for effective and efficient remediation treatment technology for pesticide-contaminated soils. Biochar has a high specific surface area, high porosity, and strong adsorption capacity, making it a soil amendment agent and carbon fixation agent that can improve soil health and enhance adsorption capacity for pesticides to remediate contaminated soils. Recently, efforts have been made to enhance the physicochemical and adsorption properties of biochar by preparing modified biochar, and it has been developed to expand the application of biochar. Specifically, the following aspects were reviewed and discussed: (i) source and modification methods of biochar for pesticide remediation; (ii) the effect of biochar on the environmental fate of remediating pesticides; (iii) the effect of biochar on pesticide-contaminated soils; and (iv) potential problems for the large-scale promotion and application of biochar remediation of pesticides. In conclusion, this review may serve as a reference and guide for pesticide remediation, hence reducing the environmental concerns associated with pesticides in soil.

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Singh, Jagjit, Chuck Yu et Jeong Tai Kim. « Building Pathology — Toxic Mould Remediation ». Indoor and Built Environment 20, n^o 1 (17 décembre 2010) : 36–46. http://dx.doi.org/10.1177/1420326x10392056.

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The purpose of this paper is to provide examples of strategies and procedures for remediation of buildings affected by toxic moulds. Four case studies are included in the paper. Moisture and inadequate ventilation are the keys to proliferation of toxic moulds and dispersion of spores in air. Prevention should always be the main objectives for any environmental management plan or service maintenance of a building. The management and remediation plan should include an adequate control of moisture, damp and ventilation in the building. The most effective strategy for remediating mould problems is by source control, preventing or limiting the generation of moulds, and the other is to remove the sources. There should be a detailed study to identify the sources of mould problems. The remediation could involve mothballing of a building to rectify defects including leaks and removal of damp materials; venting of underfloor or wall cavities and to improve the general airflow in the building. Remediation may involve vacuuming to remove spores in air and mould from surfaces. Other techniques include heat treatment, steam cleaning, biocides treatment, fumigation and UV treatment.

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Cui, Jia-Qi, Qing-Sheng He, Ming-Hui Liu, Hong Chen, Ming-Bo Sun et Jian-Ping Wen. « Comparative Study on Different Remediation Strategies Applied in Petroleum-Contaminated Soils ». International Journal of Environmental Research and Public Health 17, n^o 5 (2 mars 2020) : 1606. http://dx.doi.org/10.3390/ijerph17051606.

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Due to the increasing pollution by petroleum hydrocarbons (PHs), it is an important task to develop eco-friendly and highly efficient methods for remediating petroleum-contaminated soils. In this study, bioremediation technology was applied to remediate PHs contaminated soils, and the bacterial community structure and physicochemical characteristics of the soil treated using different bioremediation regimens were analyzed. Compared with the control condition (S0), the PHs removal efficiency of biostimulation (S2) and bioaugmentation (S3) was increased significantly. Combined biostimulation with bioaugmentation (S4) had the highest PHs removal efficiency, up to 60.14 ± 4.12%. Among all the selected remediation strategies (S1–S4, S1: soil moisture content: 25–30%), the bacterial alpha-diversity was higher than in S0. The genera Acinetobacter, Escherichia-Shigella, Bacteroides, Microbacterium, and Parabacteroides were found to greatly contribute to PHs’ degradation. In the group S4, the PH-degraders and soil enzyme activity were higher than in the other remediation regimens, and these indices gradually decreased in the mid-to-later periods of all remediation tests. Additionally, the abundance of alkB and nah genes was increased by improving the environmental condition of the microorganism communities. Redundancy analysis (RDA) revealed that the total nitrogen (TN) and total phosphorus (TP) had a positive correlation with total PHs degradation. This study offers insights into the microbial community response to environmental factors during bioremediation, which shows a promoting effect in enhancing the efficiency of PHs remediation.

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Gupta, Vibha. « Nanoremediation- Clean up technology for water pollution ». Psychology and Education Journal 58, n^o 1 (15 janvier 2021) : 4833–41. http://dx.doi.org/10.17762/pae.v58i1.1644.

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The most challenging task of the recent time is to search for ecofriendly, sustainable and economically feasible technology for cleaning water resources. Nanotechnology is one of the emerging technology of the current time which offers several environmental applications including remediation of water pollution. It is a promising clean up technology to combat water pollution wherein various methods can be involved to form new products, improve existing instruments and helps in reformulating new materials and chemicals which has better performance. It is therefore referred as green technology in terms of energy conservation and reduces the release of toxic compounds into environment. Nanotechnology in future holds great promises in remediating water related pollution problems in a sustainable way. The following review article summarizes the recent trends in the ongoing research related to environment remediation by nanotechnology.

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Henry, Heather F., et William A. Suk. « Sustainable exposure prevention through innovative detection and remediation technologies from the NIEHS Superfund Research Program ». Reviews on Environmental Health 32, n^o 1-2 (1 mars 2017) : 35–44. http://dx.doi.org/10.1515/reveh-2016-0037.

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Abstract Innovative devices and tools for exposure assessment and remediation play an integral role in preventing exposure to hazardous substances. New solutions for detecting and remediating organic, inorganic, and mixtures of contaminants can improve public health as a means of primary prevention. Using a public health prevention model, detection and remediation technologies contribute to primary prevention as tools to identify areas of high risk (e.g. contamination hotspots), to recognize hazards (bioassay tests), and to prevent exposure through contaminant cleanups. Primary prevention success is ultimately governed by the widespread acceptance of the prevention tool. And, in like fashion, detection and remediation technologies must convey technical and sustainability advantages to be adopted for use. Hence, sustainability – economic, environmental, and societal – drives innovation in detection and remediation technology. The National Institute of Health (NIH) National Institute of Environmental Health Sciences (NIEHS) Superfund Research Program (SRP) is mandated to advance innovative detection, remediation, and toxicity screening technology development through grants to universities and small businesses. SRP recognizes the importance of fast, accurate, robust, and advanced detection technologies that allow for portable real-time, on-site characterization, monitoring, and assessment of contaminant concentration and/or toxicity. Advances in non-targeted screening, biological-based assays, passive sampling devices (PSDs), sophisticated modeling approaches, and precision-based analytical tools are making it easier to quickly identify hazardous “hotspots” and, therefore, prevent exposures. Innovation in sustainable remediation uses a variety of approaches: in situ remediation; harnessing the natural catalytic properties of biological processes (such as bioremediation and phytotechnologies); and application of novel materials science (such as nanotechnology, advanced membranes, new carbon materials, and materials reuse). Collectively, the investment in new technologies shows promise to reduce the amount and toxicity of hazardous substances in the environment. This manuscript highlights SRP funded innovative devices and tools for exposure assessment and remediation of organic, inorganic, and mixtures of contaminants with a particular focus on sustainable technologies.

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Pang, Yean Ling, Yen Ying Quek, Steven Lim et Siew Hoong Shuit. « Review on Phytoremediation Potential of Floating Aquatic Plants for Heavy Metals : A Promising Approach ». Sustainability 15, n^o 2 (10 janvier 2023) : 1290. http://dx.doi.org/10.3390/su15021290.

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Water pollution due to heavy metals has become a serious environmental concern due to their hazardous properties. Since conventional water remediation techniques are generally ineffective and non-environmentally friendly, phytoremediation has gained increasing attention from worldwide researchers and scientists due to its cost-effectiveness and environmental friendliness. Hence, this review first discussed soil and water remediations. Phytoremediation can be divided into five techniques to remove heavy metals from the polluted environment, namely, phytostabilization (phytosequestration), phytodegradation (phytotransformation), phytofiltration (rhizofiltration), phytoextraction (phytoaccumulation), and phytovolatilization. Four common floating aquatic plants (accumulator plants), such as duckweed (Lemna minor), water lettuce (Pistia stratiotes), water hyacinth (Eichhornia crassipes), and watermoss (Salvinia) were discussed in detail due to their great capability in absorbing the metal ions by their roots and further translocating the metal ions to the aerial parts. Furthermore, the parameter studies, such as optimum pH and temperature of the water, exposure duration, initial metal concentration, water salinity, and the addition of chelating agents, were evaluated. The absorption kinetics of the plants was discussed in detail. In short, phytoremediation is a promising green and sustainable water remediation approach. However, further research is necessary to enhance its practicability and performance at large-scale implementation.

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Gavrilescu, Maria, Maria Emiliana Fortuna et Isabela Maria Simion. « SUSTAINABILITY IN ENVIRONMENTAL REMEDIATION ». Environmental Engineering and Management Journal 10, n^o 12 (2011) : 1987–96. http://dx.doi.org/10.30638/eemj.2011.264.

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Ramli, Nur Syafiqah, Aaâ€™isyah Abdul Gafar et Mohd Yunus Shukor. « Bacillus sp. UPM-AAG1 for The Bioremediation of Ammonia in Aquaculture Wastewater ». Bioremediation Science and Technology Research 7, n^o 2 (28 décembre 2019) : 1–4. http://dx.doi.org/10.54987/bstr.v7i2.484.

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The widespread activity of the aquaculture industry has led to environmental pollution resulting from the uncontrollable production of ammonia from aquaculture activities. The presence of ammonia in the environment is a major threat due to its toxicity that can bring harm to organism especially aquatic organisms. Bioremediation is an efficient technique for the remedy of ammonia pollution as it provides complete assimilation of the ammonia. In this work, a bacterial isolate identified as Bacillus strain UPM-AAG1 shows the best performance out of the four isolates screened for remediating ammonia. The characterization of Bacillus strain UPM-AAG1 was conducted to identify the optimum conditions for ammonia utilization by Bacillus strain UPM-AAG1. The optimum pH for ammonia remediation by Bacillus strain UPM-AAG1 was determined to be acidic at pH 6.0. While the optimum condition for ammonia concentration was determined to be at 10 mg/mL. For the optimum temperature for ammonia remediation by Bacillus strain UPM-AAG1 was determined to be at 30 oC.

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Lata, Sneh, et Sukhminderjit Kaur. « Evolution of Technologies for Cadmium Remediation and Detoxification ». Nature Environment and Pollution Technology 21, n^o 1 (6 mars 2022) : 321–30. http://dx.doi.org/10.46488/nept.2022.v21i01.039.

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Heavy metal pollution is one of the most serious global environmental concerns. As a result, the current research includes an overview of technologies that are being developed for remediating or eliminating such contaminants from the environment, such as physical and chemical approaches, as well as their ineffectiveness. A wide range of minute species was discovered for their potential to tolerate, resist, accumulate and absorb heavy metals. But they all are naturally occurring species and need optimal conditions as well as a longer duration to grow. Thus, there is a need for more reliable, efficient, and productive techniques to address the issue. The use of nanoparticles for remediation has paved the way for more research in this subject and the development of useful technology to cope with problems. The evolution of technologies for heavy metal remediation, particularly cadmium, is discussed in this article because it is one of the most hazardous heavy metals that necessitates immediate attention.

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Akhmadiev, A. K., et V. N. Ekzaryan. « Environmental remediation in foreign countries : experience of legal regulation ». Proceedings of higher educational establishments. Geology and Exploration 63, n^o 4 (12 octobre 2021) : 88–97. http://dx.doi.org/10.32454/0016-7762-2020-63-4-88-97.

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Background. Environmental remediation plays an important role in mitigating or eliminating environmental damage. The worldwide experience in organising and regulating ecosystem recovery activity is of interest.Aim. An extensive comparative analysis of the particularities of legal regulation in the sphere of environmental remediation in foreign countries.Materials and methods. The study was based on three major criteria: the environmental remediation enshrined in law; the provision of the term “remediation” or its equivalent; identifying the objects of remediation. The analysis was based on the examination of the legal information registers and official government and parliament resources of over 20 countries worldwide. The study covers the period from 1970 to 2019, because since the 1970s, one can speak about the widespread implementation of environmental laws. In individual cases, the first mentioning of the current environmental law was taken as a starting point.Results. Based on the results of the study, the countries were divided into two categories. The first group was dominated by the vertical environmental legislation system and the second — by the horizontal one. The authors described the features of each group and identified the characteristic features of environmental remediation management. These features include the requirements for remediation plans, action plans enshrined in the law, introduction of special cadastre, importance ranking of remediation objects, etc. Formulating a universal interpretation of the “environmental remediation” term is another significant result of this study.Conclusions. The study showed that the need for and importance of environmental remediation is recognised worldwide. In the meantime, it is necessary to identify the principles of environmental remediation and to systematise approaches to ecosystem restoration.

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Morris, Samuel C. « Environmental Engineering Forum : Risk-Based Environmental Remediation ». Journal of Environmental Engineering 123, n^o 7 (juillet 1997) : 626–27. http://dx.doi.org/10.1061/(asce)0733-9372(1997)123:7(626).

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Al-Hashimi, Osamah, Khalid Hashim, Edward Loffill, Tina Marolt Čebašek, Ismini Nakouti, Ayad A. H. Faisal et Nadhir Al-Ansari. « A Comprehensive Review for Groundwater Contamination and Remediation : Occurrence, Migration and Adsorption Modelling ». Molecules 26, n^o 19 (29 septembre 2021) : 5913. http://dx.doi.org/10.3390/molecules26195913.

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The provision of safe water for people is a human right; historically, a major number of people depend on groundwater as a source of water for their needs, such as agricultural, industrial or human activities. Water resources have recently been affected by organic and/or inorganic contaminants as a result of population growth and increased anthropogenic activity, soil leaching and pollution. Water resource remediation has become a serious environmental concern, since it has a direct impact on many aspects of people’s lives. For decades, the pump-and-treat method has been considered the predominant treatment process for the remediation of contaminated groundwater with organic and inorganic contaminants. On the other side, this technique missed sustainability and the new concept of using renewable energy. Permeable reactive barriers (PRBs) have been implemented as an alternative to conventional pump-and-treat systems for remediating polluted groundwater because of their effectiveness and ease of implementation. In this paper, a review of the importance of groundwater, contamination and biological, physical as well as chemical remediation techniques have been discussed. In this review, the principles of the permeable reactive barrier’s use as a remediation technique have been introduced along with commonly used reactive materials and the recent applications of the permeable reactive barrier in the remediation of different contaminants, such as heavy metals, chlorinated solvents and pesticides. This paper also discusses the characteristics of reactive media and contaminants’ uptake mechanisms. Finally, remediation isotherms, the breakthrough curves and kinetic sorption models are also being presented. It has been found that groundwater could be contaminated by different pollutants and must be remediated to fit human, agricultural and industrial needs. The PRB technique is an efficient treatment process that is an inexpensive alternative for the pump-and-treat procedure and represents a promising technique to treat groundwater pollution.

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Gullbring, P., et T. Hammar. « Remediation of PCB-Contaminated Sediments in Lake Järns Jon, Emän River System, Sweden ». Water Science and Technology 28, n^o 8-9 (1 octobre 1993) : 297–306. http://dx.doi.org/10.2166/wst.1993.0628.

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Järnsjön, a lake in the Swedish river Emån, contains approx. 400 kg of PCB which is slowly leaching out from the sediments. An analysis program has shown that the Järnsjön sediments are the primary source for ongoing discharge of PCB to the river. Based on the current yearly discharge of 7 kg PCB, the sediments will cause problems during several decades. The Emän river is classified as a resource of national importance. Remediation of Järnsjön is necessary if continued damage is to be avoided. However, remedial activities in lake Järnsjön can lead to an additional load on Emån. Restrictions on such releases during remediation of Järnsjön will therefore be stringently applied. The feasibility of remediating Järnsjön, has been examined in a number of studies carried out by the Swedish EPA together with different universities, institutes and consulting companies. A primary alternative has been selected. This alternative includes vacuum dredging within a protective barrier of silt screens. Dredged material will be dewatered and disposed of in a special landfill. This remedial action is estimated to cost appr. 40 million Swedish kronor. (6 - 8 million dollars). The remediation has started and will be concluded in 1994.

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Grifoni, Martina, Elisabetta Franchi, Danilo Fusini, Marco Vocciante, Meri Barbafieri, Francesca Pedron, Irene Rosellini et Gianniantonio Petruzzelli. « Soil Remediation : Towards a Resilient and Adaptive Approach to Deal with the Ever-Changing Environmental Challenges ». Environments 9, n^o 2 (25 janvier 2022) : 18. http://dx.doi.org/10.3390/environments9020018.

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Pollution from numerous contaminants due to many anthropogenic activities affects soils quality. Industrialized countries have many contaminated sites; their remediation is a priority in environmental legislation. The aim of this overview is to consider the evolution of soil remediation from consolidated invasive technologies to environmentally friendly green strategies. The selection of technology is no longer exclusively based on eliminating the source of pollution but aims at remediation, which includes the recovery of soil quality. “Green remediation” appears to be the key to addressing the issue of remediation of contaminated sites as it focuses on environmental quality, including the preservation of the environment. Further developments in green remediation reflect the aim of promoting clean-up strategies that also address the effects of climate change. Sustainable and resilient remediation faces the environmental challenge of achieving targets while reducing the environmental damage caused by clean-up interventions and must involve an awareness that social systems and environmental systems are closely connected.

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TAZAKI, Kazue. « Environmental Biomineralization and Microbial Remediation. » Shigen-to-Sozai 112, n^o 12 (1996) : 827–35. http://dx.doi.org/10.2473/shigentosozai.112.827.

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Müller, Dietmar, et Hervé Gaboriau. « EURODEMO - environmental efficiency of remediation ». Land Contamination & ; Reclamation 17, n^o 3 (1 novembre 2009) : 651–59. http://dx.doi.org/10.2462/09670513.965.

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Weidman, Stephanie M., Carol N. Welsh et Lawrence N. Bonino. « Accounting for Environmental Remediation Costs ». Business and Professional Ethics Journal 13, n^o 1 (1994) : 147–63. http://dx.doi.org/10.5840/bpej1994131/23.

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Gifford, S., R. H. Dunstan, W. O'Connor, T. Roberts et R. Toia. « Pearl aquaculture—profitable environmental remediation ? » Science of The Total Environment 319, n^o 1-3 (février 2004) : 27–37. http://dx.doi.org/10.1016/s0048-9697(03)00437-6.

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Kamat, Prashant V., et Dan Meisel. « Nanoscience opportunities in environmental remediation ». Comptes Rendus Chimie 6, n^o 8-10 (août 2003) : 999–1007. http://dx.doi.org/10.1016/j.crci.2003.06.005.

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Zhu, Jiahua, Suying Wei, Minjiao Chen, Hongbo Gu, Sowjanya B. Rapole, Sameer Pallavkar, Thomas C. Ho, Jack Hopper et Zhanhu Guo. « Magnetic nanocomposites for environmental remediation ». Advanced Powder Technology 24, n^o 2 (mars 2013) : 459–67. http://dx.doi.org/10.1016/j.apt.2012.10.012.

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Langseth, David E. « Valuing Environmental Remediation Liability Transfers ». Environmental Claims Journal 20, n^o 1 (13 février 2008) : 2–22. http://dx.doi.org/10.1080/10406020701845718.

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Dudley, Susan E. « Discounting risky environmental remediation costs ». Environmental Claims Journal 7, n^o 2 (décembre 1994) : 69–75. http://dx.doi.org/10.1080/10406029409383815.

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Plaue, Jon, et Ken R. Czerwinski. « Actinide Speciation in Environmental Remediation ». Journal of Nuclear Science and Technology 39, sup3 (novembre 2002) : 461–65. http://dx.doi.org/10.1080/00223131.2002.10875507.

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Nusbaum, Edward E., et Judith Weiss. « Accounting for environmental remediation liabilities ». Journal of Corporate Accounting & ; Finance 8, n^o 2 (1997) : 165–71. http://dx.doi.org/10.1002/jcaf.3970080217.

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Chen, Dingwang, M. Sivakumar et Ajay K. Ray. « Heterogeneous Photocatalysis in Environmental Remediation ». Developments in Chemical Engineering and Mineral Processing 8, n^o 5-6 (15 mai 2008) : 505–50. http://dx.doi.org/10.1002/apj.5500080507.

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Muhammad, Abubakar, et Faggo Abdullahi Adamu. « Biodegradation of Used Engine Oil by Pseudomonas sp. Isolated from an Automobile Workshop’s Soil ». Journal of Environmental Microbiology and Toxicology 10, n^o 2 (31 décembre 2022) : 59–62. http://dx.doi.org/10.54987/jemat.v10i2.774.

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Environmental pollution caused by used engine oil has been on the increase as a result of accidental or deliberate discharge of the oil. Used engine oil is relatively recalcitrant to biodegradation due to the high concentrations of metals from the wear and tear of engine parts. Several physical and chemical methods were employed for the remediation of used engine oil-contaminated soil, but bioremediation remains the most economical especially in remediating polluted soils. Therefore, this work aimed to isolate and screen efficient used engine oil-degrading bacteria from serval automobile workshops located at Gadau town, Itas Gadau, Bauchi state, Nigeria. Soil samples were collected from three different locations and were used to isolate, and screen used engine oil-degrading bacteria. The best degrader was Pseudomonas sp. with 82% degradation of 1% (v/v) of used engine oil after 5 days of aerobic incubation. The result further indicated that degradation occurs best at 1% (v/v) and no degradation was recorded at 3% (v/v) of used engine oil. Pseudomonas sp. can be employed in the field remediation of used engine oil-contaminated soil.

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García-Villacís, Karina, Luis Ramos-Guerrero, José Luis Canga, Daniel Hidalgo-Lasso et Paul Vargas-Jentzsch. « Environmental Impact Assessment of Remediation Strategy in an Oil Spill in the Ecuadorian Amazon Region ». Pollutants 1, n^o 4 (28 novembre 2021) : 234–52. http://dx.doi.org/10.3390/pollutants1040019.

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Past petroleum-extraction activities in Ecuador have contaminated its Amazon region. To assess the environmental impact attributed to remediation activities regarding the cleanup of these oil spills, two scenarios were studied according to Life Cycle Analysis methodology: (1) No-action, which means to leave the contamination in place without any further action and (2) Environmental remediation, where the environmental-load attributed to the remediation of the representative oil spill was studied. Results indicated that the no-action scenario presented a higher environmental impact for 12 out of the 16 environmental categories evaluated (climate change, ozone depletion, human toxicity non-cancer effects, particulate matter, ionizing radiation human health, ionizing radiation ecosystem, photochemical ozone formation, acidification, terrestrial eutrophication, marine eutrophication, freshwater ecotoxicity, mineral, fossil and renewable resource depletion). Moreover, the no-action scenario presented a global weighted score of contamination of 5.45 points, while the remediation scenario got a score of 3.3 points, which means that the remediation decreased by 39% of the global environmental impact due to the remediation activity applied, showing the positive influence of environmental remediation to mitigate the effects attributed to the presence of pollution sources associated to the petroleum industry in the Ecuadorian Amazon region.

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Mikhaleva, N. V., et S. G. Golubeva. « Forensic Practices Related to Environmental Remediation Investigations ». Theory and Practice of Forensic Science 13, n^o 4 (27 décembre 2018) : 68–75. http://dx.doi.org/10.30764/1819-2785-2018-13-4-68-75.

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A year ago the Supreme Court of the Russian Federation issued its Plenum Decree No. 49 «On some issues of applying legislation regulating environmental damage remediation». The paper examines several sections of the decree, including Section 13 (on damage compensation by recovery of costs and (or) making the defendant liable for site remediation), Section 14 (on the court’s use of fees and environmental damage assessment methodologies) and Section 18 (on the possibility of making the defendant liable for environmental remediation if a remedial action plan is already in place), as well as forensic practices involved in their enforcement. The authors conclude that substantive remediation of environmental damage requires the assessment of potential costs of remedial action by means of forensic environmental investigation and preparation of recultivation and other remedial project plans.

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Zango, Zakariyya Uba, Khairulazhar Jumbri, Nonni Soraya Sambudi, Anita Ramli, Noor Hana Hanif Abu Bakar, Bahruddin Saad, Muhammad Nur’ Hafiz Rozaini et al. « A Critical Review on Metal-Organic Frameworks and Their Composites as Advanced Materials for Adsorption and Photocatalytic Degradation of Emerging Organic Pollutants from Wastewater ». Polymers 12, n^o 11 (10 novembre 2020) : 2648. http://dx.doi.org/10.3390/polym12112648.

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Water-borne emerging pollutants are among the greatest concern of our modern society. Many of these pollutants are categorized as endocrine disruptors due to their environmental toxicities. They are harmful to humans, aquatic animals, and plants, to the larger extent, destroying the ecosystem. Thus, effective environmental remediations of these pollutants became necessary. Among the various remediation techniques, adsorption and photocatalytic degradation have been single out as the most promising. This review is devoted to the compilations and analysis of the role of metal-organic frameworks (MOFs) and their composites as potential materials for such applications. Emerging organic pollutants, like dyes, herbicides, pesticides, pharmaceutical products, phenols, polycyclic aromatic hydrocarbons, and perfluorinated alkyl substances, have been extensively studied. Important parameters that affect these processes, such as surface area, bandgap, percentage removal, equilibrium time, adsorption capacity, and recyclability, are documented. Finally, we paint the current scenario and challenges that need to be addressed for MOFs and their composites to be exploited for commercial applications.

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Noviliani, Noviliani, Stepanus Sahala Sitompul et Hamdani Hamdani. « REMEDIASI MISKONSEPSI PESERTA DIDIK MENGGUNAKAN MODEL PEMBELAJARAN CORE TENTANG KALOR DI SMP ». Jurnal Inovasi Penelitian dan Pembelajaran Fisika 3, n^o 2 (12 septembre 2022) : 86. http://dx.doi.org/10.26418/jippf.v3i2.56697.

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The purpose of study was to determine the effectiveness of remediation of misconceptions by using the Connecting, Organizing, Reflecting, and Extending (CORE) learning model to reduce the number of student who had misconceptions about heat at SMP Negeri 6 Sambas. The form of design was pre-experimental with one group pretest-posttest design. This study used a random sampling method in intac group involving 35 students of class VIIIA who were tested using a multiple-choice diagnostic test consisting of 9 questions. Based in data analysis, there was a decrease in the percentage of the students who experienced misconceptions with an average of 75.75%. The result of McNemar’s test shows that the calculated 2 of 28.26 is greater than 2 table of 3.84, so there is a significant conceptual change after remedial activities using the CORE model. The effectiveness of remediations based in the DQM price with an average of 83.27% (high category). The CORE model is expected to be used as an alternative to remediation activities to reduce the number of students who experience misconceptions.

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Hu, Hong Tao. « Research on Environmental Materials with Variation of Pollutant and Environmental Factor in Underground Environment ». Advanced Materials Research 675 (mars 2013) : 188–91. http://dx.doi.org/10.4028/www.scientific.net/amr.675.188.

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The removal efficiency of pollutant in an enhanced remediation with a permeable reactive barrier (PRB) was studied in this paper. The experimental results showed that the DO value has varied obviously because of the oxidation and reduction near the electrodes, i.e. the pH value near the anode changed from 6.3 to 7.9 but near the cathode it varied from 6.5 to 6.4 in the experiment process, which inflected that the variation content of the DO near anode chamber was bigger than that of the anode chamber during the electrokinetic remediation process. The removal efficiency of Cd was respectively 63.91% near the anode and 86.79% near the cathode, and the removal efficiency of COD was respectively 44.86% near the anode and 90.31% near the cathode at the end of experiment when the experimental voltage gradient was 0.35V/cm, which indicated that this new enhanced electrokinetic remediation of groundwater was more effective method than that of ordinary PRB containing environmental materials.

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Thangavelu, Lakshmi, Geetha Royapuram Veeraragavan, Sreekanth Kumar Mallineni, Ezhilarasan Devaraj, Royapuram Parthasarathy Parameswari, Nazmul Huda Syed, Kamal Dua, Dinesh Kumar Chellappan, Sri Renukadevi Balusamy et Ujjal K. Bhawal. « Role of Nanoparticles in Environmental Remediation : An Insight into Heavy Metal Pollution from Dentistry ». Bioinorganic Chemistry and Applications 2022 (17 mars 2022) : 1–13. http://dx.doi.org/10.1155/2022/1946724.

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Environmental damage is without a doubt one of the most serious issues confronting society today. As dental professionals, we must recognize that some of the procedures and techniques we have been using may pose environmental risks. The usage and discharge of heavy metals from dental set-ups pollute the environment and pose a serious threat to the ecosystem. Due to the exclusive properties of nanosized particles, nanotechnology is a booming field that is being extensively studied for the remediation of pollutants. Given that the nanoparticles have a high surface area to volume ratio and significantly greater reactivity, they have been greatly considered for environmental remediation. This review aims at identifying the heavy metal sources and their environmental impact in dentistry and provides insights into the usage of nanoparticles in environmental remediation. Although the literature on various functions of inorganic nanoparticles in environmental remediation was reviewed, the research is still confined to laboratory set-ups and there is a need for more studies on the usage of nanoparticles in environmental remediation.

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Shak, Katrina Pui Yee, Yean Ling Pang et Shee Keat Mah. « Nanocellulose : Recent advances and its prospects in environmental remediation ». Beilstein Journal of Nanotechnology 9 (19 septembre 2018) : 2479–98. http://dx.doi.org/10.3762/bjnano.9.232.

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Among many other sustainable functional nanomaterials, nanocellulose is drawing increasing interest for use in environmental remediation technologies due to its numerous unique properties and functionalities. Nanocellulose is usually derived from the disintegration of naturally occurring polymers or produced by the action of bacteria. In this review, some invigorating perspectives on the challenges, future direction, and updates on the most relevant uses of nanocellulose in environmental remediation are discussed. The reported applications and properties of nanocellulose as an adsorbent, photocatalyst, flocculant, and membrane are reviewed in particular. However, additional effort will be required to implement and commercialize nanocellulose as a viable nanomaterial for remediation technologies. In this regard, the main challenges and limitations in working with nanocellulose-based materials are identified in an effort to improve the development and efficient use of nanocellulose in environmental remediation.

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Chaturvedi, Shalini, et Pragnesh N. Dave. « Environmental Application of Photocatalysis ». Materials Science Forum 734 (décembre 2012) : 273–94. http://dx.doi.org/10.4028/www.scientific.net/msf.734.273.

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Recent interest and studies in environmental photo-chemistry, in natural photosynthesis, and chemical methods for solar energy transformations has contributed greatly to our knowledge and understanding of the various phenomena related to both photo-chemistry and catalysis. As an emerging nanotechnology come together with the chemical mechanisms of photo-catalysis, the photo-catalytic nanoparticle titanium dioxide offers a new meaning of remediation and degradation on volatile organic compounds in the aqueous and airs streams. In this chapter we discuss about application of photocatalysis in environment like biological contamination, air purification, water disinfection, hazardous waste remediation, water purification, self-clean buildings, deodorizing, anti-bacterial action, anti-fogging resolving cleaning action etc.

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Liu, Yaci, Mengtuo Wen, Lin Wu, Shengwei Cao et Yasong Li. « Environmental Behavior and Remediation Methods of Roxarsone ». Applied Sciences 12, n^o 15 (28 juillet 2022) : 7591. http://dx.doi.org/10.3390/app12157591.

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Roxarsone (ROX) is used extensively in the broiler chicken industry, and most is excreted in poultry litter. ROX degradation produces inorganic arsenic, which causes arsenic contamination of soil and aquatic environment. Furthermore, elevated arsenic concentrations are found in livers of chickens fed ROX. Microorganisms, light, and ions are the main factors that promote ROX degradation in the environment. The adsorption of ROX on different substances and its influencing factors have also been studied extensively. Additionally, the remediation method, combining adsorption and degradation, can effectively restore ROX contamination. Based on this, the review reports the ecological hazards, discussed the transformation and adsorption of ROX in environmental systems, documents the biological response to ROX, and summarizes the remediation methods of ROX contamination. Most previous studies of ROX have been focused on identifying the mechanisms involved under theoretical conditions, but more attention should be paid to the behavior of ROX under real environmental conditions, including the fate and transport of ROX in the real environment. ROX remediation methods at real contaminated sites should also be assessed and verified. The summary of previous studies on the environmental behavior and remediation methods of ROX is helpful for further research in the future.

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Santos, Claudson Gomes, et Eloiza Suimay Azevedo Carvalho. « Environmental technologies used for the mitigation of industrial environmental impacts ». Ciência e Natura 42 (31 décembre 2020) : e4. http://dx.doi.org/10.5902/2179460x41268.

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With the growth of the world population, constant technological evolution and consequent change in the habits of our society, human activity is gradually increasing its capacity of alteration to the environment. Small acts of environmental preservation result in great feats for the ecosystem, for humanity and are preludes for the continuity of life. This study discusses the dispersion of pollutants caused by industries, the importance of the remediation technologies used, which can prevent and / or mitigate the impacts that are caused to the environment. This study is a comparison between end-of-pipe technologies and cleaner production, which are the most used by industries. It was based on the environmental impacts caused by the industries and on the most used remediation technologies as mechanisms to reduce or prevent these impacts.

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Monfort, Olivier, et Yanlin Wu. « Photocatalytic Processes for Environmental Applications ». Processes 9, n^o 11 (20 novembre 2021) : 2080. http://dx.doi.org/10.3390/pr9112080.

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Guerra, Fernanda, Mohamed Attia, Daniel Whitehead et Frank Alexis. « Nanotechnology for Environmental Remediation : Materials and Applications ». Molecules 23, n^o 7 (18 juillet 2018) : 1760. http://dx.doi.org/10.3390/molecules23071760.

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Environmental remediation relies mainly on using various technologies (e.g., adsorption, absorption, chemical reactions, photocatalysis, and filtration) for the removal of contaminants from different environmental media (e.g., soil, water, and air). The enhanced properties and effectiveness of nanotechnology-based materials makes them particularly suitable for such processes given that they have a high surface area-to-volume ratio, which often results in higher reactivity. This review provides an overview of three main categories of nanomaterials (inorganic, carbon-based, and polymeric-based materials) used for environmental remediation. The use of these nanomaterials for the remediation of different environmental contaminants—such as heavy metals, dyes, chlorinated organic compounds, organophosphorus compounds, volatile organic compounds, and halogenated herbicides—is reviewed. Various recent examples are extensively highlighted focusing on the materials and their applications.

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Singh, Veena Krishan. « Remediation : A Novel Approach for Reducing Environmental Pollution ». Journal for Research in Applied Sciences and Biotechnology 1, n^o 4 (31 octobre 2022) : 201–7. http://dx.doi.org/10.55544/jrasb.1.4.29.

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Hazardous contaminants persist more and more now, which negatively impacts the world in various ways. Nearly every second species on earth is experiencing the worst problem with their existence as a result of high environmental contamination. While more recent remediation methods have made improvements, conventional methods have not successfully removed dangerous substances from the environment. Hazardous contaminants elimination using the remediation technique (HCER) is a process that uses remineralization to eliminate hazardous contaminants from contaminated soils and groundwater. The process involves removing hazardous constituents from contaminated soil or groundwater through either mechanical or biological means; then replacing these constituents with beneficial elements to restore environmental quality. Remediation technologies are used for both on-site and off-site applications, including landfills, industrial sites, municipal solid waste landfills, construction sites (e.g., roads), mine tailing piles and other areas where contamination exists due to anthropogenic activities such as mining operations, oil spills and landfill leachate seepage. The present study aims to examine and analyze the literature in the area of remediation strategies used to get rid of toxins, mainly from soil and water.

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Shrader-Frechette, Kristin. « Health Risks from Supposedly Remediated US Hazardous-Waste Sites : An Early-Warning Signal ». Advances in Environmental and Engineering Research 3, n^o 3 (2 juin 2022) : 1. http://dx.doi.org/10.21926/aeer.2203032.

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Scientific data are almost nonexistent regarding the health-protectiveness of most hazardous-waste-site remediation. Given this data-gap, recently the World Health Organization (WHO) urged scientists to develop methods of “cost-efficient health surveillance” of toxics’ cleanups, including any “illegal operations”. Following WHO, this article’s importance is to develop one such cost-efficient method. Given the assumption that remediators’-redevelopers’ public misrepresentations of their cleanups’ safety may warrant independently assessing the health-adequacy of their remediation, the article asks the question: “For US hazardous-waste sites, deemed by the courts ‘Imminent and Substantial Endangerment’ (ISE) health threats, are remediators’ public representations of testing-cleanup quality consistent with what their more private technical documents say?” The working hypothesis is that for representative toxic sites, remediators’-redevelopers’ public representations of cleanup often contradict their private technical documents. Using the US Environmental Protection Agency (EPA) weight-of-evidence method, the article (1) develops 5 transparent, reproducible criteria for discovering representative, ISE-designated, US toxic-waste sites; (2) develops 3 transparent, reproducible criteria to discover remediators’-redevelopers’ public representations of their testing-cleanup; (3) uses these 3 criteria to discover what remediators’-redevelopers’ private or technical documents say about the health-adequacy of their testing/cleanup; (4) investigates whether any public representations in (2) contradict any of (3)’s private or technical documents; and (5) discusses the degree to which such contradictions, if any, suggest waste-site threats to health or environmental justice. Our results show that for the representative hazardous sites assessed, many remediator-redeveloper public guarantees of testing-cleanup quality contradict their private or technical documents. The discussion suggests that such contradictions likely violate EPA scientific-integrity regulations, threaten public health, jeopardize environmental justice, thus may require independent investigation of the adequacy of testing-cleanup. For representative, US toxic-waste sites, posing court-determined ISE, remediators’-developers’ public representations of testing-cleanup quality threaten health by often contradicting their private technical documents. The article closes by outlining two scientific strategies to promote health-protective, hazardous-waste testing/remediation.

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ISHIKURA, Takeshi, et Reiko FUJITA. « Environmental Remediation Cost in Fukushima Area ». Journal of the Atomic Energy Society of Japan 55, n^o 1 (2013) : 40–47. http://dx.doi.org/10.3327/jaesjb.55.1_40.

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Ma, Zhen. « Cobalt Oxide Catalysts for Environmental Remediation ». Current Catalysis 3, n^o 1 (février 2014) : 15–26. http://dx.doi.org/10.2174/22115447113029990017.

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Nazarzadeh Zare, Ehsan, Ackmez Mudhoo, Moonis Ali Khan, Marta Otero, Zumar Muhammad Ali Bundhoo, Manvendra Patel, Anju Srivastava et al. « Smart Adsorbents for Aquatic Environmental Remediation ». Small 17, n^o 34 (25 avril 2021) : 2007840. http://dx.doi.org/10.1002/smll.202007840.

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