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Ho Y. Comment on “Removal of Ni2+ and Cu2+ Ions from Aqueous Solutions on to Lignite-based Carbons”, by S.E. Samra. ADSORPT SCI TECHNOL 2016. [DOI: 10.1260/026361702320360612] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Y.S. Ho
- School of Public Health, Taipei Medical University, 250 Wu-Hsing St., Taipei, Taiwan
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Carvalho WA, Vignado C, Fontana J, Riboldi MB. The Removal of Heavy Metal Ions from Aqueous Effluents by Modified Clays: Retention of Cd(II) and Ni(II) Ions. ADSORPT SCI TECHNOL 2016. [DOI: 10.1260/026361707785082332] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Wagner A. Carvalho
- Faculty of Chemistry, CEATEC, Pontifícia Universidade Católica de Campinas, Rodovia Dom Pedro I, Km 136, Parque das Universidades, CEP 13086-900, Campinas, SP, Brazil
- Centre for Natural Sciences and Humanities, Federal University of ABC, Rua Santa Adélia, 166, 09210-170, Santo Andre, Brazil
| | - Carolina Vignado
- Faculty of Chemistry, CEATEC, Pontifícia Universidade Católica de Campinas, Rodovia Dom Pedro I, Km 136, Parque das Universidades, CEP 13086-900, Campinas, SP, Brazil
| | - Juliane Fontana
- Faculty of Chemistry, CEATEC, Pontifícia Universidade Católica de Campinas, Rodovia Dom Pedro I, Km 136, Parque das Universidades, CEP 13086-900, Campinas, SP, Brazil
| | - Marina B. Riboldi
- Faculty of Chemistry, CEATEC, Pontifícia Universidade Católica de Campinas, Rodovia Dom Pedro I, Km 136, Parque das Universidades, CEP 13086-900, Campinas, SP, Brazil
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Jha B, Basha S, Jaiswar S, Mishra B, Thakur MC. Biosorption of Cd(II) and Pb(II) onto brown seaweed, Lobophora variegata (Lamouroux): kinetic and equilibrium studies. Biodegradation 2009; 20:1-13. [PMID: 18427935 DOI: 10.1007/s10532-008-9194-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2007] [Accepted: 04/09/2008] [Indexed: 10/22/2022]
Abstract
The present work deals with the biosorption performance of raw and chemically modified biomass of the brown seaweed Lobophora variegata for removal of Cd(II) and Pb(II) from aqueous solution. The biosorption capacity was significantly altered by pH of the solution delineating that the higher the pH, the higher the Cd(II) and Pb(II) removal. Kinetic and isotherm experiments were carried out at the optimal pH 5.0. The metal removal rates were conspicuously rapid wherein 90% of the total sorption occurred within 90 min. Biomass treated with CaCl(2) demonstrated the highest potential for the sorption of the metal ions with the maximum uptake capacities i.e. 1.71 and 1.79 mmol g(-1) for Cd(II) and Pb(II), respectively. Kinetic data were satisfactorily manifested by a pseudo-second order chemical sorption process. The process mechanism consisting of both surface adsorption and pore diffusion was found to be complex. The sorption data have been analyzed and fitted to sorption isotherm of the Freundlich, Langmuir, and Redlich-Peterson models. The regression coefficient for both Langmuir and Redlich-Peterson isotherms were higher than those secured for Freundlich isotherm implying that the biosorption system is possibly monolayer coverage of the L. variegata surface by the cadmium and lead ions. FT-IR studies revealed that Cd(II) and Pb(II) binding to L. variegata occurred primarily through biomass carboxyl groups accompanied by momentous interactions of the biomass amino and amide groups. In this study, we have observed that L. variegata had maximum biosorption capacity for Cd(II) and Pb(II) reported so far for any marine algae.
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Affiliation(s)
- Bhavanath Jha
- Discipline of Marine Biotechnology and Ecology, Central Salt and Marine Chemicals Research Institute, Bhavnagar, 364 002, Gujarat, India.
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Green-Ruiz C, Rodriguez-Tirado V, Gomez-Gil B. Cadmium and zinc removal from aqueous solutions by Bacillus jeotgali: pH, salinity and temperature effects. BIORESOURCE TECHNOLOGY 2008; 99:3864-70. [PMID: 17697774 DOI: 10.1016/j.biortech.2007.06.047] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Revised: 06/18/2007] [Accepted: 06/18/2007] [Indexed: 05/16/2023]
Abstract
Effects of pH, salinity and temperature on biosorption of Cd and Zn by bacteria Bacillus jeotgali strain U3 were evaluated in batch experiments. Traditional and Subsequent Addition Methods (SAM) were used to carry out the bioassays. Sorption of metals was higher when pH or temperature was increased, or when salinity was reduced. The Langmuir isotherm better fit the biosorption data for Cd, while the Freundlich model fitted better for Zn biosorption. A comparison with similar biosorbents suggested that Bacillus jeotgali strain U3 could be considered a good biosorbent for Cd and Zn recovery.
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Affiliation(s)
- Carlos Green-Ruiz
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Joel Montes Camarena s/n, Col. Centro, 82000 Mazatlán, Sin., Mexico. mailto:
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Günay A, Arslankaya E, Tosun I. Lead removal from aqueous solution by natural and pretreated clinoptilolite: adsorption equilibrium and kinetics. JOURNAL OF HAZARDOUS MATERIALS 2007; 146:362-71. [PMID: 17261347 DOI: 10.1016/j.jhazmat.2006.12.034] [Citation(s) in RCA: 408] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2006] [Revised: 12/12/2006] [Accepted: 12/13/2006] [Indexed: 05/13/2023]
Abstract
Adsorption of Pb(II) ions from aqueous solution onto clinoptilolite has been investigated to evaluate the effects of contact time, initial concentration and pretreatment of clinoptilolite on the removal of Pb(II). Experimental data obtained from batch equilibrium tests have been analyzed by four two-parameter (Freundlich, Langmuir, Temkin and Dubinin-Radushkevich), four three-parameter (Redlich-Peterson, Sips, Toth and Khan) isotherm models, and kinetic models including the pseudo-first order, the pseudo-second order and Elovich equations using nonlinear regression technique. Of the two-parameter isotherms, Temkin isotherm was the best to describe the experimental data. Three-parameter isotherms have higher regression coefficients (>0.99) and lower relative errors (<5%) than two-parameter isotherms. The best fitting isotherm was the Sips followed by Toth and Redlich-Peterson isotherm equations. Maximum experimental adsorption capacity was found to be 80.933 and 122.400 mg/g for raw and pretreated clinoptilolite, respectively, for the initial concentration of 400 mg/L. Kinetic parameters; rate constants, equilibrium adsorption capacities and related coefficients for each kinetic model were evaluated according to relative errors and correlation coefficients. Results of the kinetic studies show that best fitted kinetic models are obtained to be in the order: the pseudo-first order, the pseudo-second order and Elovich equations. Using the thermodynamic equilibrium coefficients, Gibbs free energy of the Pb(II)-clinoptilolite system was evaluated. The negative value of change in Gibbs free energy (DeltaG degrees ) indicates that adsorption of Pb(II) on clinoptilolite is spontaneous.
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Affiliation(s)
- Ahmet Günay
- Chairmenship of Environmental Protection Department, Antalya Great Municipality, Antalya, Turkey
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Alvarez-Ayuso E, García-Sánchez A, Querol X. Adsorption of Cr(VI) from synthetic solutions and electroplating wastewaters on amorphous aluminium oxide. JOURNAL OF HAZARDOUS MATERIALS 2007; 142:191-8. [PMID: 16978771 DOI: 10.1016/j.jhazmat.2006.08.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2005] [Revised: 06/26/2006] [Accepted: 08/02/2006] [Indexed: 05/11/2023]
Abstract
The adsorption behaviour of amorphous aluminium oxide was studied with respect to Cr(VI) in order to consider its application to purify electroplating wastewaters. A batch method was employed using Cr(VI) concentrations ranged from 10 to 200mg/l. The Langmuir model was found to describe the adsorption process well, offering a maximum adsorption capacity of 78.1mg/g. The effect of ionic strength (0-0.1M KNO(3)), pH (3-9) and competitive solutes (molar ratio [Cr(VI)]/[SO(4)(2-)]=1 and 100) on the retention process was evaluated. Cr(VI) adsorption on amorphous aluminium oxide appeared to be dependent on ionic strength with a more pronounced effect in acid conditions. Conversely, adsorption was not affected by pH in acid medium, but decreased when pH sifted to alkaline values. The presence of SO(4)(2-) greatly reduced Cr(VI) removal across the entire pH range when both solutes were present in similar concentrations. Amorphous aluminium oxide also showed a high adsorption capacity when used in the purification of Cr(VI) electroplating wastewaters. The adsorbent doses required to attain more than 90% of Cr(VI) removal varied between 1 and 5 g/l depending on Cr(VI) concentration in wastewaters.
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Affiliation(s)
- E Alvarez-Ayuso
- Institute of Earth Sciences Jaume Almera (CSIC), C/ Lluís Solé i Sabarís, s/n, 08028 Barcelona, Spain.
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Oter O, Akcay H. Use of natural clinoptilolite to improve water quality: sorption and selectivity studies of lead(II), copper(II), zinc(II), and nickel(II). WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2007; 79:329-35. [PMID: 17469665 DOI: 10.2175/106143006x111880] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Natural clinoptilolite can be used as an ion exchanger for removal of heavy metals and treatment of environmental pollution because of its desirable characteristics of high ion exchange selectivity and resistance to different media. In this work, the potential of natural clinoptilolite from Gördes mines (West Anatolia, Turkey) for the uptake of lead(II), nickel(II), copper(II), and zinc(II), from their single and mixed ion solutions, was evaluated using the batch method. The mineralogical and chemical properties of the sorption material were carried out by X-ray diffraction, X-ray fluoremetry, scanning electron microscopy, and wet analysis. Contact time, initial solution pH, solid-to-liquid ratio, and initial metal cation concentration were determined as single ion sorption parameters. The silicon/aluminum ratio and the theoretical and equivalent exchange capacities, both in single and mixed solutions, were established. Corresponding adsorption constants and distribution coefficients have been found.
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Affiliation(s)
- Ozlem Oter
- Department of Chemistry, Dokuz Eylül University, 35160, Tinaztepe, Izmir, Turkey.
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Voronkov M, Vlasova N, Pozhidaev Y, Belousova L, Grigoryeva O. Organosilicon ion-exchange and complexing adsorbents. POLYM ADVAN TECHNOL 2006. [DOI: 10.1002/pat.743] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ho YS. Comment on "Cadmium removal from aqueous solutions by chitin: kinetic and equilibrium studies". WATER RESEARCH 2004; 38:2962-2965. [PMID: 15223292 DOI: 10.1016/s0043-1354(03)00427-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2002] [Revised: 03/15/2003] [Accepted: 03/19/2003] [Indexed: 05/24/2023]
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Ho YS. Affinity dye–ligand poly(hydroxyethyl methacrylate)/chitosan composite membrane for adsorption lysozyme and kinetic properties. Biochem Eng J 2003. [DOI: 10.1016/s1369-703x(03)00056-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ho YS. Comment on “Adsorption of fluoride, phosphate, and arsenate ions on a new type of ion exchange fiber,” by R.X. Liu, J.L. Guo, and H.X. Tang. J Colloid Interface Sci 2003; 262:307-8. [PMID: 16256610 DOI: 10.1016/s0021-9797(03)00173-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2002] [Accepted: 02/06/2003] [Indexed: 11/29/2022]
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