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Relevant bibliographies by topics / Adsorption optimization

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Journal articles

Academic literature on the topic 'Adsorption optimization'

Author: Grafiati

Published: 16 January 2024

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Journal articles on the topic "Adsorption optimization"

1

Adewoye, LT, SI Mustapha, AG Adeniyi, JO Tijani, MA Amoloye, and LJ Ayinde. "OPTIMIZATION OF NICKEL (II) AND CHROMIUM (III) REMOVAL FROM CONTAMINATED WATER USING SORGHUM BICOLOR." Nigerian Journal of Technology 36, no. 3 (2017): 960–72. http://dx.doi.org/10.4314/njt.v36i3.41.

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A central composite design (CCD) under the response surface methodology (RSM)was used to study the effect of three adsorption variables (pH, initial concentration, and adsorbent dosage) in order to determine the optimum process conditions for the adsorptions of Ni (II) and Cr (III) onto sulphuric acid modified sorghum bicolor activated carbon (SBAC).This study yielded removal efficiency of 98.89 % for Ni (II) and 94.27 % for Cr (III) ion under optimal conditions of pH (8), initial metal ion concentration (25 mg/L), adsorbent dosage (10 mg) and pH (7), initial metal ion concentration (5 mg/L), dosage (15 mg);respectively. Statistical analysis of variance results showed a good correlation existed between the experimental and predicted data with R2 values of 0.99 for Ni and 0.98 for Cr. The equilibrium data for Ni (II) adsorption was best described using Freundlich model while Langmuir model best fit Cr (III) adsorption. The mechanism of adsorption for both Ni and Cr adsorptions on SBAC followed Pseudo second order kinetic model.Â Â http://dx.doi.org/10.4314/njt.v36i3.41

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2

Gugushe, Aphiwe Siyasanga, Azile Nqombolo, and Philiswa N. Nomngongo. "Application of Response Surface Methodology and Desirability Function in the Optimization of Adsorptive Remediation of Arsenic from Acid Mine Drainage Using Magnetic Nanocomposite: Equilibrium Studies and Application to Real Samples." Molecules 24, no. 9 (2019): 1792. http://dx.doi.org/10.3390/molecules24091792.

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A magnetic multi-walled carbon nanotube/zeolite nanocomposite was applied for the adsorption and removal of arsenic ions in simulated and real acid mine drainage samples. The adsorption mechanism was investigated using two-parameter (Langmuir, Freundlich, Temkin) and three-parameter (Redlich–Peterson, and Sips) isotherm models. This was done in order to determine the characteristic parameters of the adsorptive removal process. The results showed that the removal process was described by both mono- and multilayer adsorptions. Adsorption studies demonstrated that a multi-walled carbon nanotube/zeolite nanocomposite could efficiently remove arsenic in simulated samples within 35 min. Based on the Langmuir isotherm, the adsorption capacity for arsenic was found to be 28 mg g−1. The nanocomposite was easily separated from the sample solution using an external magnet and the regeneration was achieved by washing the adsorbent with 0.05 mol L−1 hydrochloric acid solution. Moreover, the nanoadsorbent was reusable for at least 10 cycles of adsorption-desorption with no significant decrease in the adsorption capacity. The nanoadsorbent was also used for the arsenic removal from acid mine drainage. Overall, the adsorbent displayed excellent reusability and stability; thus, they are promising nanoadsorbents for the removal of arsenic from acid mine drainage.

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3

Aristov, Yuriy I., Ivan S. Glaznev, and Ilya S. Girnik. "Optimization of adsorption dynamics in adsorptive chillers: Loose grains configuration." Energy 46, no. 1 (2012): 484–92. http://dx.doi.org/10.1016/j.energy.2012.08.001.

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4

Sujatha, S., R. Sivarethinamohan, A. Oorkalan, et al. "Exclusion of Chromium(VI) Ion in Grueling Activated Carbon Fabricated from Manilkara zapota Tree Wood by Adsorption: Optimization by Response Surface Methodology." Journal of Nanomaterials 2022 (April 23, 2022): 1–9. http://dx.doi.org/10.1155/2022/8157815.

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The current paper makes obvious the elimination of chromium(VI) ion, from wastewater via adsorption technique with activated carbon generated from Manilkara zapota tree (MZTWAC). Preliminarily MZTWAC has undergone characterization studies which uncovered the suitability of MZTWAC to expel chromium(VI) from aqueous solution. Batch adsorption experimentation was premeditated with the competence of central composite design (CCD) and it was executed. Response surface methodology (RSM) was the key optimization software to appraise the adsorptive chattels of MZTWAC engaged in removing chromium(VI) ion in aqueous solution which explored the interactions flanked between four expounding variables explicitly initial concentration of chromium(VI) ion, pH of the solution, MZTWAC dose and time of exposure, and contact time. The response variable that was concentrated in the study was adsorption capacity. It was deduced a polynomial in quadratic equation was documented amid the adsorption capacity and variables influencing the adsorption with R 2 = 0.9792 which was projected as the best suit for the adsorption process. ANOVA that is expanded as analysis of variance judged the connotation of adsorption process variables. 0.2 g of MZTWAC dosage has removed 87.629% chromium(VI) from aqueous solution. The enhancement of adsorption process reclined on the attainment of maximum adsorption capacity which further depends on the optimization of variables under consideration. This criterion was accomplished by the desirability function optimizing the process variables.

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5

Jin, Xue Yuan, Hong Liu, and San Fu Zhu. "Optimization for Purification Technology of Platycodins by Macroreticular Resin." Advanced Materials Research 781-784 (September 2013): 852–55. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.852.

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In order to purify the platycodins from Platycodon grandiflorum, AB-8 macroporous resin was used to test. Based on single factor experiments, orthogonal test was used to optimum the purification conditions. Adsorption pH, adsorption temperature, adsorption time and platycodins concentration were as factors and adsorption capacity was as index. The results were as follows: adsorption pH 6.0, adsorption temperature 40°C, adsorption tim110min, platycodins concentration 2.0mg/mL were the optimization conditions.The adsorption quantity reached at 39.1mg/g. So AB-8 macroporous resin was a suitable resin for purify the platycodins from Platycodon grandiflorum.

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6

Mobed, M., and T. M. S. Chang. "Adsorption of chitin derivatives onto liposomes: Optimization of adsorption conditions." Journal of Microencapsulation 15, no. 5 (1998): 595–607. http://dx.doi.org/10.3109/02652049809008243.

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7

Akulinin, E. I., A. A. Ishin, S. A. Skvortsov, D. S. Dvoretsky, and S. I. Dvoretsky. "Optimization of Adsorption Processes with Cyclic Variable Pressure in Gas Mixture Separation." Advanced Materials & Technologies, no. 3 (2017): 051–60. http://dx.doi.org/10.17277/amt.2017.03.pp.051-060.

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8

Hassan, M. M., K. F. Loughlin, and M. E. Biswas. "Optimization of continuous countercurrent adsorption systems." Separations Technology 6, no. 1 (1996): 19–27. http://dx.doi.org/10.1016/0956-9618(95)00137-9.

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9

Ko, Daeho, and Il Moon. "Multiobjective Optimization of Cyclic Adsorption Processes." Industrial & Engineering Chemistry Research 41, no. 1 (2002): 93–104. http://dx.doi.org/10.1021/ie010288g.

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10

Asanu, Mohammed, Dejene Beyene, and Adisu Befekadu. "Removal of Hexavalent Chromium from Aqueous Solutions Using Natural Zeolite Coated with Magnetic Nanoparticles: Optimization, Kinetics, and Equilibrium Studies." Adsorption Science & Technology 2022 (July 5, 2022): 1–22. http://dx.doi.org/10.1155/2022/8625489.

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Stringent discharge limits, high costs, and low removal efficiency of the conventional treatment methods are facing challenges to handle industrial effluents containing heavy metals. The objective of this study was to use a recoverable magnetic zeolite to remove Cr(VI) from aqueous solution. The study investigated the application of nanotechnology to improve surface properties, recoverability, and adsorptive capacity of natural zeolite and the CCD-RSM-based optimization of adsorption process variables. Natural zeolites coated with various fractions of magnetic nanoparticles (25%, 33.33%, 50%, and 75%) were investigated for surface characters, adsorption capacity, removal efficiency, and recoverability. Natural zeolite coated with 33.33% (MZ33) was found a better adsorbent in terms of surface characters, adsorption capacity, and removal efficiency. Thirty batch adsorption experiments designed with CCD were carried out in order to optimize adsorption process variables using response surface methodology (RSM). It was found that adsorbent dose = 2 g / L , contact time = 75 min , initial Cr VI concentration = 10 mg / L , and solution pH = 1.5 were the optimum conditions to achieve 93.57% Cr(VI) removal, which is very close to the experimental result of 94.88%. The adsorption isotherm determined from the operating parameters revealed that experimental data fit to the Langmuir isotherm model with R 2 = 0.9966 and maximum adsorption capacity = 43.933 mg / g . This proved that the adsorption of Cr(VI) on magnetic zeolite involved monolayer adsorption on the active sites. The separation factor, R L , value lies between 0 and 1 indicating that adsorption of Cr(VI) on the magnetic zeolite is favorable. The adsorption kinetics study follows pseudo-first order in the removal of Cr(VI). FTIR analysis of magnetic zeolite revealed the presence of numerous functional groups participating in Cr(VI) adsorption. The current study confirmed that magnetic zeolite is a cost-effective and favorable material for the removal of Cr(VI) from aqueous solution.

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