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Academic literature on the topic 'Hg and Cr IONS'

Author: Grafiati

Published: 11 September 2023

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Journal articles on the topic "Hg and Cr IONS"

Neelgund, Gururaj M., Erica A. Jimenez, Ram L. Ray, and Mahaveer D. Kurkuri. "Facilitated Adsorption of Mercury(II) and Chromium(VI) Ions over Functionalized Carbon Nanotubes." Toxics 11, no. 6 (June 20, 2023): 545. http://dx.doi.org/10.3390/toxics11060545.

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By considering the importance of water and its purity, herein, a powerful adsorbent has been developed for the adsorption of two toxic contaminants that commonly exist in water, viz., divalent mercury and hexavalent chromium. The efficient adsorbent, CNTs–PLA–Pd, was prepared by covalent grafting polylactic acid to carbon nanotubes and subsequent deposition of palladium nanoparticles. The CNTs–PLA–Pd could adsorb Hg(II), and Cr(VI) entirely exists in water. The adsorption rate for Hg(II) and Cr(VI) was rapid at initial stage, followed by gradual decrease, and attained the equilibrium. The Hg(II) and Cr(VI) adsorption was perceived within 50 min and 80 min, respectively with CNTs–PLA–Pd,. Further, experimental data for Hg(II) and Cr(VI) adsorption was analyzed, and kinetic parameters were estimated using pseudo–first and second–order models. The adsorption process of Hg(II) and Cr(VI) followed the pseudo–second–order kinetics, and the rate–limiting step in the adsorption was chemisorption. The Weber−Morris intraparticle pore diffusion model revealed that the Hg(II) and Cr(VI) adsorption over CNTs–PLA–Pd occurs through multiple phases. The experimental equilibrium parameters for the Hg(II) and Cr(VI) adsorption were estimated by Langmuir, Freundlich, and Temkin isotherms models. All three models were well suited and demonstrated that Hg(II) and Cr(VI) adsorption over CNTs–PLA–Pd transpires through monolayer molecular covering and chemisorption.

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Rievaj, Miroslav, Elena Korgová, and Dušan Bustin. "Acid Hydrolysis of the Diaquacyanoethylenediamine-Nitrosylchromium Cation and Its Reactions with Mercury(II) and Silver(I) Ions." Collection of Czechoslovak Chemical Communications 58, no. 6 (1993): 1371–77. http://dx.doi.org/10.1135/cccc19931371.

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Preparation of the [Cr(H2O)2CN (en) NO]+ ion in solution by acid hydrolysis of [CrH2O(CN)2 (en) NO] including its ion exchange separation is described. The polarographic properties of [Cr(H2O)2CN (en) NO]+ as well as the kinetics of its acid hydrolysis were studied. Reactions of this complex with Hg(II) and Ag(I) were investigated and binuclear and trinuclear adducts were found to form. Linkage isomerization of the bridging cyanide in such adducts is deduced from their electrochemical properties. The spontaneous isomerization of the unstable isomer with the Cr-NC bond to the stable isomer with the Cr-CN bond was followed after its liberation by a competitive complexation of Hg(II) with excess iodide. The kinetics of decomposition of the adducts with Hg(II) was measured to examine the influence of H+ and Hg(II) concentrations.

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Wang, Zhong-Jie, Fa-Yuan Ge, Guo-Hao Sun, and He-Gen Zheng. "Two MOFs as dual-responsive photoluminescence sensors for metal and inorganic ion detection." Dalton Transactions 47, no. 25 (2018): 8257–63. http://dx.doi.org/10.1039/c8dt01363b.

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Two MOFs were synthesized and explored as dual-responsive photoluminescent sensors: 1 for Fe³⁺ and Cr₂O₇²⁻ ions, and 2 for Hg²⁺ and Cr₂O₇²⁻ ions.

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Rievaj, Miroslav, Elena Korgová, and Dušan Bustin. "Electrochemical Study of cis-Cyanoaquobis(ethylenediamine)chromium(III) Ion and Its Adducts with Hg(II) and Ag(I)." Collection of Czechoslovak Chemical Communications 58, no. 2 (1993): 328–34. http://dx.doi.org/10.1135/cccc19930328.

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The paper describes voltammetric and polarographic properties of the cis-cyanoaquobis(ethylenediamine)chromium(III) complex and the kinetics of its acid hydrolysis. The reactions of this complex with Hg(II) and Ag(I) ions were studied. Formation of di- and trinuclear adducts was found. Linkage isomerisation of CN bridging group in these adducts (Cr-NC-Hg and Cr-NC-Ag) was proposed on the basis of their electrochemical properties. The kinetics of formation and decomposition of [Cr(CN)(en)2(H2O)]2+ adducts with Hg(II) and Ag(I) are described and the factors affecting them are discussed.

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Wanjari, S. M., Lata Deshmukh, and L. J. Paliwal. "Chromatographic Separation of Heavy Metal Cations on a Silica Gel-G with Amino Acid." E-Journal of Chemistry 9, no. 4 (2012): 2446–52. http://dx.doi.org/10.1155/2012/826028.

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Thin layer chromatographic method has been developed for the separation of metal ions such as Cr(VI), Cr(III), As(III), Cd(II), Tl(III) and Hg(II) from their two, three and four component mixtures. The separations were performed on thin layer of silica gel ‘G’ using aqueous l-Alanine as mobile phase. The effect of concentration and pH of mobile phase on the Rfvalues of individual metal ions were studied and the optimum conditions for separation of metal ions from their mixture were determined.

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Chou, Chun-Yen, Robert Sung, Wei-Luen Chang, and Kuangsen Sung. "A GFP-chromophore-based C3V-symmetric tripodal receptor with selective recognition of Hg(ii), Fe(iii) and Cr(iii)." Materials Chemistry Frontiers 4, no. 6 (2020): 1714–19. http://dx.doi.org/10.1039/d0qm00108b.

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Manelis, R., H. Hornung, L. Fishelson, and A. Yawetz. "The Effects of Exposure to Heavy Metal Ions on Cytochrome b5 and Components of the Mixed-Function Oxidases from the Digestive Gland Microsomes of the Mollusc Monodonta turbinata." Water Science and Technology 27, no. 7-8 (April 1, 1993): 473–80. http://dx.doi.org/10.2166/wst.1993.0584.

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LT50 values obtained for Monodontaturbinata exposed to heavy metal ions were as follows: 25.2 days after exposure to final concentration of 1.0ppm Cd+2; 21.2 days for 0.1ppm Hg+2; 25.2 for 0. 5ppm Cr+3 and 16.8 days for 0.5ppm Cr+6, compared to 32.8 days for the control. The final concentrations of metal ions in the mollusc tissue increased by 20 times in the Hg+2, and by 10 times in the Cd+2 treated Monodonta, compared to the untreated control. The normal contents of cytochromes be and P450 in Monodontaturbinata digestive gland microsomes were 195±51 and 58±20 nmol/mg protein, respectively. NADPH-cytochrome c reductase activity was 5.9±3.0 nmol/min/mg protein. Exposure to all heavy metal ions had a destructive effect on the two hemoproteins, especially on cytochrome P450, and a pronounced impact on NADPH-cytochrome c activity which was reduced to about 50% in the treated mollusc. No alarming concentrations of metal ions could be detected in Monodontaturbinata collected from different sites along Israel Mediterranean coast.

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Channegowda, Manjunatha. "Recent advances in environmentally benign hierarchical inorganic nano-adsorbents for the removal of poisonous metal ions in water: a review with mechanistic insight into toxicity and adsorption." Nanoscale Advances 2, no. 12 (2020): 5529–54. http://dx.doi.org/10.1039/d0na00650e.

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Water contaminated with heavy metal ions, As³⁺, Pb²⁺, Cr⁶⁺, Cd²⁺, and Hg² is known to be toxic or carcinogenic. We review the mechanistic toxicity and carcinogenicity of these ions and hierarchically architectured inorganic nano-adsorbents for their removal are explored.

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Koley, Pradyot, Makoto Sakurai, Toshiaki Takei, and Masakazu Aono. "Facile fabrication of silk protein sericin-mediated hierarchical hydroxyapatite-based bio-hybrid architectures: excellent adsorption of toxic heavy metals and hazardous dye from wastewater." RSC Advances 6, no. 89 (2016): 86607–16. http://dx.doi.org/10.1039/c6ra12818a.

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Facilely fabricated silk protein sericin-mediated hierarchical hydroxyapatite hybrid architectures show excellent adsorption of toxic heavy metal ions of Pb(ii), Cd(ii) and Hg(ii) and a hazardous dye, Congo red (CR), from wastewater.

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Geneti, Sintayehu Tamenne, Gemechis Asfaw Mekonnen, H. C. Ananda Murthy, Endale Tsegaye Mohammed, C. R. Ravikumar, Bedasa Abdisa Gonfa, and Fedlu Kedir Sabir. "Biogenic Synthesis of Magnetite Nanoparticles Using Leaf Extract of Thymus schimperi and Their Application for Monocomponent Removal of Chromium and Mercury Ions from Aqueous Solution." Journal of Nanomaterials 2022 (April 15, 2022): 1–15. http://dx.doi.org/10.1155/2022/5798824.

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Currently, plant templated synthesis of magnetite iron oxide nanoparticles (Fe3O4 NPs) was emerged for multifunctional purposes. In this study, the leaf extract of the plant Thymus schimperi was utilized to synthesize Fe3O4 NPs. The synthesized NPs were characterized by using technical tools such as X-ray diffraction (XRD) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy-energy dispersive X-ray (SEM-EDX) analysis, and ultraviolet-visible (UV-Vis) spectroscopy, and thermal analysis (TGA-DTA). The XRD result corroborated the presence of desired phase formation having pure cubic face centered phase structure with average crystallite particle size ranging from 20 nm to 30 nm. SEM micrographs confirmed microstructural homogeneities and remarkably different morphology of Fe3O4 NPs. Mercury (II) and chromium (VI) removal efficiencies of Fe3O4 NPs were found to be 90% and 86% from aqueous solution at initial concentration of 20 mg/L, respectively. Various factors which affect the metal ion removal efficiency such as metal ion initial concentrations, pH, contact time, and adsorbent dosage were also studied. The optimum pH and contact time for chromium ion adsorption were pH 5 and 60 min and that of mercury were observed to be pH 7 and 90 min, respectively. The Langmuir isotherm was best fitted for sorption of Hg(II) ion, and the Freundlich isotherm was best fitted with sorption of Cr(VI) ion onto the surface of Fe3O4 NPs. The mechanism of adsorption of both Hg(II) and Cr(VI) ions was obeyed pseudo 2nd order kinetics. The recorded percent removal efficiencies revealed that these Fe3O4 NPs synthesized through leaf extract of the plant called Thymus schimperi have demonstrated excellent potentiality in the remediation of heavy metal ions. The synthesized Fe3O4 NPs were regenerated (reused) for adsorptive removal of Hg(II) and Cr(VI) for five consecutive cycles without significant loss of removal efficiency. Fe3O4 NPs were reused with only 4.17% loss of removal efficiency against Hg(II) and only 3% loss of removal efficiency against Cr(VI) metal ions.

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Dissertations / Theses on the topic "Hg and Cr IONS"

Silva, Francisco das Chagas Beserra da. "Estudo da mistura comercial dolomita-quartzo, dopada com Hg(I), Cd(II) e Cr(III), para adsor??o de H2S." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17715.

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The present work was to carry out a study on the adsorption of hydrogen sulfide (H2S) in arrays synthesized from a commercial clay mineral formed by a mixture of dolomite and quartz. To produce the ion exchange matrix were made using aqueous solutions of salts of cobalt II chloride hexahydrate (CoCl2.6H2O) II cadmium nitrate tetrahydrate (Cd (NO3)2.4H2O) I mercuric chloride (HgCl) nitrate and chromium III pentahydrate (Cr (NO3)3.5H2O). The arrays were subjected to hydrogen sulphide gas passage for one hour. To check the amount of gas adsorbed was used gravimetric process. The best result was in the adsorption matrix doped with cadmium and the solution retained for a longer time than the largest amount of H2S was the cobalt matrix. The matrix unmodified exhibited poor adsorption capacity. The characterization of the matrices were used XRD, XRF and IV. Mother with cadmium showed a high capacity in ion exchange, because the percentage of cadmium increased from 0% to 81.38% by replacing atoms of calcium and silicon which increased from 96.54% to 17.56% and 15, 72% to 0.32%, respectively, but also the best performance in adsorption of H2S adsorbing 11.89507 mg per gram of matrix
O presente trabalho teve como finalidade realizar um estudo sobre a capacidade de adsor??o de g?s sulf?drico(H2S) em matrizes sintetizadas a partir de um argilomineral comercial formado por uma mistura de dolomita e quartzo. Para produzir as matrizes foram feitas trocas i?nicas utilizando as solu??es aquosas dos sais: cloreto de cobalto II hexaidratado(CoCl2.6H2O), nitrato de c?dmio II tetraidratado (Cd(NO3)2.4H2O), cloreto de merc?rio I (HgCl) e nitrato de cromo III pentaidratado(Cr(NO3)3.5H2O). As matrizes foram submetidas a passagem de g?s sulf?drico durante uma hora. Para verificar a quantidade de g?s adsorvido foi utilizado o processo de gravimetria. O melhor resultado na adsor??o foi com a matriz dopada com a solu??o de c?dmio e a que reteve por mais tempo a maior quantidade de H2S, foi a matriz com cobalto. A matriz n?o modificada apresentou uma fraca capacidade de adsor??o. Na caracteriza??o das matrizes foram utilizadas an?lises de DRX, FRX e IV. A matriz com c?dmio apresentou uma alta capacidade na troca i?nica, pois a porcentagem de c?dmio passou de 0% para 81,38%, substituindo ?tomos de c?lcio e de sil?cio que passaram de 96,54% para 17,56% e de 15,72% para 0,32%, respectivamente, como tamb?m, o melhor desempenho na adsor??o, adsorvendo 11,89507mg de H2S por grama de matriz

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Vieira, Rodrigo Silveira. "Remoção e recuperação de ions Hg (II) utilizando quitosana natural e reticulada." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267672.

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Orientador : Marisa Masumi Beppu
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica
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Resumo: A quitosana vem sendo largamente investigada para remoção e recuperação de íons metálicos a partir de efluentes industriais. Este material, obtido por desacetilação da quitina, possui em sua estrutura grupos amino e hidroxilas, bastante reativos, que o toma um polímero de grande interesse industrial. Este trabalho objetivou estudar a adsorção e dessorção de íons Hg(II) em quito sana, utilizando-se o método estático e dinâmico de adsorção. Uma etapa de reticulação com glutaraldeído ou epic1oridrina, foi proposta, visando maximizar a adsorção e ainda caracterizar quais grupos funcionais estão envolvidos na adsorção. A reação de reticulação com glutaraldeído ou epic1oridrina, toma os grupos amino ou hidroxilas indisponíveis, respectivamente, podendo-se caracterizar a influência destes grupos na etapa de adsorção. O estudo de adsorção estática foi feito utilizando-se membranas de quito sana na forma natural ou reticulada, variando-se o pH da fase fluida e a concentração dos íons de Hg(II). O estudo de dessorção foi feito utilizandose NaCl, CaCl2 e EDTA como eluente, de modo a verificar a natureza da força de adsorção. A adsorção dinâmica foi feita utilizando-se quito sana reticulada com glutaraldeído, variando-se: vazão, tamanho da coluna, concentração do soluto e tamanho da partícula do adsorvente. Observou-se que a quito sana reticulada com glutaraldeído apresentou maior capacidade de adsorção e que a adsorção foi influenciada pelo pH da solução. O estudo de dessorção mostrou que as espécies metálicas podem ser recuperadas, utilizando-se NaCl como eluente e que a força de adsorção é principalmente de natureza eletrostática. A cinética de adsorção mostrou que não houve diferença na taxa para os três tipos de quito sana, indicando um possível efeito de filme sobre a superfície do adsorvente. A capacidade de adsorção para os experimentos em coluna foi em tomo de 75% daquela avaliada sobre condições de equilíbrio (método estático) e as espécies metálicas puderam ser recuperadas utilizando-se um pequeno volume da solução eluente. O comportamento de adsorção e dessorção dos íons Hg(II) a partir de um efluente industrial foi avaliado, e observou-se o potencial deste material, mesmo a baixas concentrações dos íons metálicos
Abstract: Chitosan has been investigated for removal and recovery of heavy metals from industrial effluents. This material, obtained by deacetylation of chitin, contains amino and hydroxyl groups in its structure. These groups, sufficiently reactive, have made this polymer very interesting for many industries applications. The aim of this work was to study the adsorption and desorption of Hg(II) ions in chitosan, using the static and dynamic methods of adsorption. Crosslinking with glutaraldehyde and epichlorohydrin was proposed, aiming to maximize the recovery of metallic species and to understand the adsorption mechanism. These species were chosen in order to verify which groups participate in the adsorption. The study of static adsorption was made using raw and crosslinked membranes of chitosan, as a function of pH and concentration of Hg(II) ions. The desorption was studied using NaCI, CaCl2 and EDTA as eluent, in order to verify the kind of adsorption. The dynamic adsorption was done using glutaraldehyde-crosslinked chitosan, as a function of the particle size, concentration, size of column and flow rate. The capacity of adsorption on glutaraldehyde-crosslinked chitosan was higher than that on raw chitosan and it was found to be pH-dependent. The desorption study showed that metallic species can be easily recovered, using NaCI as eluent, and that the adsorption force is mainly of electrostatic nature. The kinetics of adsorption showed there is no difference in the rate for the three kinds of chitosan, indicating a possible film effect at the surface of adsorbent. For column experiments the adsorption capacity was around 75% of the value found on equilibrium conditions (static method) and could be recovered using a small volume of eluent solution. The behavior of adsorption and desorption of Hg(lI) ions, from an industrial effluent, was evaluated and it was observed the potential of chitosan as adsorbent, even in low concentrations of metallic species
Mestrado
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Marshall, A. "Spectroscopy of Cr'3'+ ions in some garnet crystals." Thesis, University of Strathclyde, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382441.

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Renault, Pierre-Olivier. "Etude des défauts d'implantation dans le Hg 0,8 Cd 0,2 Te par diffusion diffuse des RX près des taches de Bragg." Poitiers, 1995. http://www.theses.fr/1995POIT2254.

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Ce travail concerne l'etude des defauts induits par des implantations d'ions al a 320 kev dans le semi-conducteur ii-vi, hg#0#,#8cd#0#,#2te. Les implantations, de 10#1#3 a 10#1#5 al/cm#2, ont ete realisees d'une part a temperature ambiante, d'autre part a la temperature de l'azote liquide. L'etude a ete menee a l'aide de la technique de diffusion diffuse des rayons x pres des taches de bragg. Les implantations realisees a temperature ambiante induisent des amas de defauts ponctuels dont le champ de deplacement a longue distance est anisotrope, comme celui des boucles de dislocation. L'analyse de la diffusion diffuse nous permet de caracteriser la nature, la taille, le type des boucles de dislocation. Apres des implantations a la temperature t90k, les observations in situ des profils des pics de bragg mettent en evidence un epaulement dans la direction 111 perpendiculaire a la surface. Cet epaulement est attribue a un volume comprime dans la direction 111. Ce volume pourrait etre associe a la presence d'une couche deformee enterree, situee a une profondeur voisine du maximum du depot d'energie nucleaire donne par la simulation trim. Un stade de recuit a ete mis en evidence autour de 150k. Apres des recuits isochrones dans le domaine de temperature 200-300k, nous analysons la repartition de la diffusion diffuse pres des taches de bragg de maniere a caracteriser precisement les boucles de dislocation induites par l'implantation

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Leigh, Nathan D. "On the velocities of ions produced at surfaces /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3012996.

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Abramowitz, Peter Prep. "Forming nitrides with low-energy ions on low-K dielectrics /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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Mello, Jesse Vincent. "Biarylpyridine fluorescent chemosensors : synthesis, structural studies, and combinatorial discovery of a Hg(II) sensor /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2004. http://wwwlib.umi.com/cr/ucsd/fullcit?p3129954.

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Guggilla, Srinivas. "Synthesis and characterization of Perovskite-related ionic and mixed ionic-electronic conductors /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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Daignère, Arnold. "Cristallogenèse et propriétés supraconductrices de l'oxyde (Hg,M)Ba2CuO4+delta (M=Cu,Mo,W,Cr)." Caen, 2001. http://www.theses.fr/2001CAEN2034.

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La synthèse de cristaux supraconducteurs de Hg-1201 (Tc max-97K) en utilisant différents cations stabilisateurs de la couche mercure associée ou non à des recuits post-synthèse a permis d'obtenir des taux de dopage allant du régime sous-dopé à surdopé. L'influence de ce dopage et de l'anisotropie sur les lignes d'irréversibilité (LI) et de second pic dans le plan (champ-température) a été discutée par mesures d'aimantation et de transport. Des mesures de relaxation magnétique ont été effectuées au voisinage du second pic. Cette relaxation s'est avérée être de type plastique quel que soit l'état de dopage de notre phase, et ce, que les cristaux présentent ou non le phénomène du second pic. Ce dernier n'a pu être relié à une transition de phase du réseau de vortex entre les phases de Bragg glass et de vortex glass. Un saut d'aimantation dans la partie réversible des cycles d'aimantation isothermes et isochamps a été observé, saut que nous avons associé à une fusion ou à une sublimation du réseau de vortex. Par analyse des fluctuations critiques, les composés sous-dopés présentent un comportement bidimensionnel, alors que les ajustements 2D et 3D donnent des résultats équivalents pour le composé optimisé (étude magnétique). Pour un état de dopage donné (légèrement sous-dopé), un crossover dimensionnel a été mis en évidence, 3D près de la transition supraconductrice et 2D à plus haute température (étude de transport). Ces résultats sont discutés en considérant la paraconductivité et le pseudogap.

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Shen, Jim Xiangxin. "Evaluation of metal ion complexation in a quadrupole ion trap mass spectrometer /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Books on the topic "Hg and Cr IONS"

United States. Environmental Protection Agency. Office of Emergency and Remedial Response., ed. Engineering bulletin: Technology alternatives for the remediation of soils contaminated with As, Cd, Cr, Hg, and Pb. Cincinnati: U.S. Environmental Protection Agency, Center for Environmental Research Information, 1997.

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Toshizo, Shirai, and National Institute of Standards and Technology (U.S.), eds. Spectral data for highly ionized atoms: Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Kr, and Mo. Melville, N.Y: American Institute of Physics for the National Institute of Standards and Technology, 2000.

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Sahoo, G. S. Directional neutron ambient dose distribution for heavy ions on thick AL target using CR-39 detector. Mumbai, India: Bhabha Atomic Research Centre, 2012.

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Technology alternatives for the remediation of soils contaminated with As, Cd, Cr, Hg, and Pb. Washington, DC: U.S. Environmental Protection Agency, Office of Emergency and Remedial Response, 1997.

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(Editor), T. Shirai, J. Sugar (Editor), A. Musgrove (Editor), and W. L. Wiese (Editor), eds. Spectral Data for Highly Ionized Atoms: Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Kr, and Mo (Jpcrd Monograph, 8). AIP Press, 2000.

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Effects Of Fluoride & Other Halogen Ions On The External Stress..., NUREG/CR-6539... U.S. Nuclear Regulatory Commission... 1997. [S.l: s.n., 1997.

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Effects Of Fluoride & Other Halogen Ions On The External Stress..., NUREG/CR-6539... U.S. Nuclear Regulatory Commission... 1997. [S.l: s.n., 1997.

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Griepink, B., and H. Muntau. The Certification of the Contents (Mass Fractions) of As, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Se and Zn in Mussel Tissue (Mytilus Edulis): CRM No. 278. European Communities / Union (EUR-OP/OOPEC/OPOCE), 1988.

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Griepink, B., and H. Muntau. The Certification of the Contents (Mass Fractions) of As, Cd, Cr, Cu, Hg, Ni, Pb, Sc, Se and Zn in 3 Sediments: Estuarine Sediment CRM 277 (BCR Information). European Communities / Union (EUR-OP/OOPEC/OPOCE), 1988.

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Book chapters on the topic "Hg and Cr IONS"

Villars, P., K. Cenzual, R. Gladyshevskii, O. Shcherban, V. Dubenskyy, V. Kuprysyuk, I. Savysyuk, and R. Zaremba. "(Hg,Cr)Sr2CuO4+δ." In Landolt-Börnstein - Group III Condensed Matter, 715. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-22847-6_607.

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Garrone, E., G. Ghiotti, and A. Zecchina. "Coordination Chemistry of Silica Supported Cr Ions: Types of Cr(II) Ions on Reduced Samples." In Olefin Metathesis and Polymerization Catalysts, 393–406. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-3328-9_17.

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Butler, N., J. Jouglar, B. Salce, L. J. Challis, A. Ramdane, and P. L. Vuillermoz. "Phonon Scattering by Cr Ions in GaP and InP." In Phonon Scattering in Condensed Matter V, 123–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82912-3_36.

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Franić, Mario, and Vlatko Galić. "As, Cd, Cr, Cu, Hg: Physiological Implications and Toxicity in Plants." In Plant Metallomics and Functional Omics, 209–51. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-19103-0_9.

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Ratera, Imma, Alberto Tárraga, Pedro Molina, and Jaume Veciana. "Sensing Hg(II) Ions in Water: From Molecules to Nanostructured Molecular Materials." In Organic Nanomaterials, 529–48. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118354377.ch24.

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Kandyel, E., X.-J. Wu, S. Adachi, and S. Tajima. "New Series of Hg-Based, (Hg,Cr)Sr2Ca n-1Cu n O y (n=2–5) Superconductors Synthesized Under High Pressure." In Advances in Superconductivity XII, 119–21. Tokyo: Springer Japan, 2000. http://dx.doi.org/10.1007/978-4-431-66877-0_27.

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Di Leo, Antonella, Santina Giandomenico, Lucia Spada, Nicola Cardellicchio, Francesco Paolo Buonocunto, Eliana Esposito, Luciana Ferraro, Laura Giordano, Alfonsa Milia, and Crescenzo Violante. "The offshore environmental impact by Sarno river in Naples bay (South-West Italy)." In Proceedings e report, 392–401. Florence: Firenze University Press, 2020. http://dx.doi.org/10.36253/978-88-5518-147-1.39.

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The goal of this work has been to establish the influence of the Sarno river on the present sedimentation in the Naples bay continental shelf by evaluating organic matter contribution and pollution. Sediments samples were collected, by van Veen grab, in 71 stations located offshore the Sarno river between Vesuvian and Sorrento Peninsula coasts. The characteristics of the surface sediments were analysed to highlight spatial trends in the (i) granulometry (grain-size); (ii) total nitrogen, organic carbon and total phosphorus; (iii) metal content (Hg, Cd, Pb, As, Cr, Cu, Ni, Zn, Fe and Mn).

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Sun, Bingyang, Zhenping Qin, Suping Cui, Yali Wang, Xiaoyu Ma, and Hongxia Guo. "Preparation of Micro-porous Chitosan Membrane and Its Adsorption Property for Cr(VI) Ions." In Springer Proceedings in Energy, 797–804. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0158-2_82.

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Zuo, Junpeng, Wenjuan Wang, Yanfang Huang, and Guihong Han. "Study on the Removal of Cr(VI) Ions by Fe-MOF from Simulated Hydrometallurgy Wastewater." In The Minerals, Metals & Materials Series, 794–801. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-22524-6_73.

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Vodopyanov, L. K., S. P. Kozyrev, Yu A. Aleshchenko, P. N. Lebedev, R. Triboulet, and Y. Marfaing. "Optical Observation of Clusters in Distribution of Cd and Hg Ions in Cation Sublattice of Cd1-xHgxTe." In Proceedings of the 17th International Conference on the Physics of Semiconductors, 947–50. New York, NY: Springer New York, 1985. http://dx.doi.org/10.1007/978-1-4615-7682-2_211.

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Conference papers on the topic "Hg and Cr IONS"

Lobnik, Aleksandra, Nena Dimitrušev, and A. F. P. Allwin Mabes Raj. "Removal of Pb²⁺, Cr³⁺ and Hg²⁺ ions from aqueous solutions using SiO₂ and amino-functionalized SiO₂ particles." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.13032.

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Zimovets, Alina, Alina Zimovets, Yury Fedorov, Yury Fedorov, Asya Ovsepyan, Asya Ovsepyan, Vyacheslav Savitskiy, and Vyacheslav Savitskiy. "THE REGULARITY OF HEAVY METALS DISTRIBUTION AND BEHAVIOR IN THE BOTTOM SEDIMENTS ON THE PROFILE “NORTHERN DVINA RIVER – WHITE SEA”." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b93c8b57a02.64869435.

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A study was conducted to investigate the level of heavy metals in bottom sediments of the Northern Dvina mouth area and the White Sea in various seasons since 2004. Of greatest interest for the study was presented as such heavy metals as Hg, Pb, Cd, Cu, Ni, Zn, Cr, which belong to the priority group of toxic elements. The heavy metals concentrations were determined with atomic absorption spectrometer. Also the grain-size composition, concentrations of organic carbon and values of hydrogen ion exponent (pH) and redox potential (Eh) in bottom sediments were determined. It was found that the levels of heavy metals in sediments significantly changed in the lateral radial direction. There is a tendency to increased concentrations of some heavy metals downstream of the river. The high concentrations of heavy metals were found within the influence of cities and towns. So the extremely high mercury concentrations were found in the sediments of small and shallow channels crossing the Arkhangelsk city. The study of heavy metal concentrations in the bottom sediments along the profile “the Northern Dvina - Dvina Bay - White sea” showed that the marginal filter contributes to the coprecipitation with suspended metals of anthropogenic genesis. These processes greatly reduce the contamination risk of the White Sea. Thus, the impact of the river on the ecosystem of the White Sea outside the marginal filter is significantly less.

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Berkeland, Dana J., J. D. Miller, Brent C. Young, James C. Bergquist, Wayne M. Itano, and David J. Wineland. "High-accuracy frequency standards using laser-cooled Hg+ ions." In Optoelectronics and High-Power Lasers & Applications, edited by Bryan L. Fearey. SPIE, 1998. http://dx.doi.org/10.1117/12.308372.

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Grandinetti, P. J., D. Nettar, and N. S. Dalal. "Hg⁺Ions in KH2PO4-Type Lattices: Novel Superhyperfine Interactions and¹⁹⁹Hg/²⁰¹Hg Hyperfine Anomaly." In Sixth IEEE International Symposium on Applications of Ferroelectrics. IEEE, 1986. http://dx.doi.org/10.1109/isaf.1986.201189.

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Young, Brenton C., Flavio C. Cruz, Dana J. Berkeland, Robert J. Rafac, James C. Bergquist, Wayne M. Itano, and David J. Wineland. "Lasers for an optical frequency standard using trapped Hg[sup +] ions." In Trapped charged particles and fundamental physics. AIP, 1999. http://dx.doi.org/10.1063/1.57474.

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Huang, Yaji, Baosheng Jin, Zhaoping Zhong, Rui Xiao, and Hongcang Zhou. "Effects of Solid Additives on the Control of Trace Elements During Coal Gasification." In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78030.

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Based on the Modified Geo-chemical Enrichment Factor (MGEF), the contents of As, Cd, Co, Cr, Cu, Mn, Hg, Pb, V, Se, Sr, Zn in coal and coal char were analyzed by using Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS) and Inductively Couple Plasma-atomic Emission Spectroscopy (ICP-AES). Limestone, dolomite and sodium carbonate were studied to control trace elements during coal gasification. Different additives show different performances in the control of trace elements. The adsorbing capacity of coal char to all of trace elements enhances when coal is mixed with limestone and dolomite. Chemical adsorption and physical adsorption of lime, which is decomposition product of limestone under high gasification temperature, are both important for As, Co, Cr, Se and Zn. The effects of limestone on Cd, Cu, Hg, Pb, V and Sr are merely caused by physical adsorption of CaO and the adsorbing capacity to Cd, Cu, V is much stronger than those to Hg, Pb, Sr. Dolomite has stronger adsorbing capacity to most of elements (except Cu, Se, Sr) than limestone. Addition of Na2CO3 decreases the MGEFs of As, Cd, Cr, Pb and Se while increases the MGEFs of Zn in coal char. Na2CO3 has little effect on the MGEFs of Co, Cu, Hg, V and Sr in coal char.

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Kumar, Pardeep, Umair Ahmed Qureshi, Khan Muhammad Brohi, Farooq Ahmed, Zeeshan Khatri, Ick Soo Kim, Avesh Kumar, and Atif Hussain Memon. "Mercury (Hg) ions removal from aqueous solution using thiol functionalized electrospun nanofiber membranes." In 5TH INTERNATIONAL CONFERENCE ON ENERGY, ENVIRONMENT AND SUSTAINABLE DEVELOPMENT (EESD-2018). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5115379.

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Zevenhoven, Maria, Rainer Backman, Bengt-Johan Skrifvars, and Mikko Hupa. "Appearance of Trace Elements in Co-Firing Fuels." In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78107.

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With the implementation of new EU guidelines the levels of maximum allowable emission levels of Cd, Tl, Hg, Sb, As, Pb, Cr, Co, Cu, Mn, Ni, V will be further restricted. This may have implications for co-combustion of coal with waste derived fuels. In this study chemical fractionation, i.e. a stepwise leaching procedure has been applied on coal, peat, sewage sludge, bark, impregnated wood and forest residue. With this method fuels are leached in three steps, i.e. leached with water, ammonium acetate and hydro chloric acid, respectively. Both solubility in different leaching agents of main ash forming matter and the trace elements Cd, Tl, Hg, Sb, As, Pb, Cr, Co, Cu, Mn, Ni, V and Zn were studied. In this way more information became available about the characteristics of co-firing fuels. Thermodynamic calculations were used to show the consequences of the interaction with main ash forming elements on the partition of Cd, Hg, Pb and Zn in the gas/ash phase.

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Borodin, N. I., A. G. Okhrimchuk, and D. V. Smolin. "The 2 micron cw oscillation due to sensitization of Tm3+ions luminescence by Cr4+ions in YAG:Tm3+,Cr4+,Ca2+crystal." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.cfc7.

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In Ref. 1 authors supported that a four-fold coordinated four-valent chromium ion Cr t 4 + may be used as a sensitizer of luminescence of some rear-earth ions in YAG crystal, but no oscillation experiments had been performed. For the first time we report about laser action on the 3H4→ 3H6transition of Tm3+ion when it is excited due to energy transfer from Cr t 4 + ions.

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Reports on the topic "Hg and Cr IONS"

Douglas, Thomas, Matthew Sturm, Joel Blum, Christopher Polashenski, Svetlana Stuefer, Christopher Hiemstra, Alexandra Steffen, Simon Filhol, and Romain Prevost. A pulse of mercury and major ions in snowmelt runoff from a small Arctic Alaska watershed. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41203.

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Atmospheric mercury (Hg) is deposited to Polar Regions during springtime atmospheric mercury depletion events (AMDEs) that require halogens and snow or ice surfaces. The fate of this Hg during and following snowmelt is largely unknown. We measured Hg, major ions, and stable water isotopes from the snowpack through the entire spring melt runoff period for two years. Our small (2.5 ha) watershed is near Barrow (now Utqiaġvik), Alaska. We measured discharge, made 10 000 snow depths, and collected over 100 samples of snow and meltwater for chemical analysis in 2008 and 2009 from the watershed snowpack and ephemeral stream channel. Our results suggest AMDE Hg complexed with Cl⁻ or Br⁻ may be less likely to be photochemically reduced and re-emitted to the atmosphere prior to snowmelt, and we estimate that roughly 25% of the Hg in snowmelt is attributable to AMDEs. Projected Arctic warming, with more open sea ice leads providing halogen sources that promote AMDEs, may provide enhanced Hg deposition, reduced Hg emission and, ultimately, an increase in snowpack and snowmelt runoff Hg concentrations.

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Muroga, T., N. Yoshida, and F. A. Garner. The influence of nickel content on microstructures of Fe-Cr-Ni austenitic alloys irradiated with nickel ions. Office of Scientific and Technical Information (OSTI), November 1990. http://dx.doi.org/10.2172/6337067.

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Sadasivakurup, Saisree, Sandhya Karunakaran Yesodha, and Arya Nair Jayadharan Salini. Graphene quantum dots doped with sulfur and nitrogen as versatile electrochemical sensors for heavy metal ions Cd(II), Pb(II), and Hg(II). Peeref, June 2023. http://dx.doi.org/10.54985/peeref.2306p9972799.

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Anderson, Andrew, and Mark Yacucci. Inventory and Statistical Characterization of Inorganic Soil Constituents in Illinois: Appendices. Illinois Center for Transportation, June 2021. http://dx.doi.org/10.36501/0197-9191/21-007.

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This report presents detailed histograms of data from the Regulated Substances Library (RSL) developed by the Illinois Department of Transportation (IDOT). RSL data are provided for state and IDOT region, IDOT district, and county spatial subsets to examine the spatial variability and its relationship to thresholds defining natural background concentrations. The RSL is comprised of surficial soil chemistry data obtained from rights-of-way (ROW) subsurface soil sampling conducted for routine preliminary site investigations. A selection of 22 inorganic soil analytes are examined in this report: Al, Sb, As, Ba, Be, Cd, Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Hg, Ni, K, Se, Na, Tl, V, and Zn. RSL database summary statistics, mean, median, minimum, maximum, 5th percentile, and 95th percentile, are determined for Illinois counties and for recognized environmental concern, non-recognized environmental concern, and de minimis site contamination classifications.

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Anderson, Andrew, and Mark Yacucci. Inventory and Statistical Characterization of Inorganic Soil Constituents in Illinois. Illinois Center for Transportation, June 2021. http://dx.doi.org/10.36501/0197-9191/21-006.

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This report presents a statistical analysis of the Regulated Substances Library (RSL) developed by the Illinois Department of Transportation. The RSL is comprised of surficial soil chemistry data obtained from rights-of-way subsurface soil sampling conducted for routine preliminary site investigations. The 3.7-million-record RSL database is compared with four independent studies of inorganic soil constituents of naturally occurring soils in Illinois. A selection of 22 inorganic soil analytes are examined in this study: Al, Sb, As, Ba, Be, Cd, Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Hg, Ni, K, Se, Na, Tl, V, and Zn. RSL database summary statistics, mean, median, minimum, maximum, 5th percentile, and 95th percentile, are determined for Illinois counties and for recognized environmental concern, non-recognized environmental concern, and de minimis site contamination classifications. The RSL database at a 95% confidence level is compared with current and proposed thresholds for defining naturally occurring soil concentrations for the selected analytes. The revised thresholds proposed by Cahill in 2017 are predominantly larger than the current standards found in the Tiered Approach to Corrective Action Objectives rules and are in better agreement with observed distributions of soil concentrations for both naturally occurring and RSL soils. A notable exception is antimony (Sb), for which Cahill proposed a reduced threshold similar in magnitude to the median for many Illinois Department of Transportation districts.

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