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Díaz A, Marrero J, Cabrera G, Coto O, Gómez JM. Optimization of nickel and cobalt biosorption by native Serratia marcescens strains isolated from serpentine deposits using response surface methodology. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:167. [PMID: 35142917 PMCID: PMC8831376 DOI: 10.1007/s10661-022-09816-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 01/22/2022] [Indexed: 05/28/2023]
Abstract
The treatment of metal-polluted wastes is a challenging issue of environmental concern. Metals can be removed using microbial biomass, and this is an interesting approach towards the design of eco-friendly technologies for liquid waste treatment. The study reported here aimed to optimize nickel and cobalt biosorption from aqueous solutions using three native metal-resistant Serratia marcescens strains. Ni(II) and Co(II) biosorption by S. marcescens strains was found to fit better to Langmuir's model, with maximum uptake capacities of 13.5 mg g-1 for Ni(II) ions and 19.9 mg g-1 for Co(II) ions. Different experimental conditions of initial metal concentration, pH, initial biomass, and temperature were optimized using the Plackett-Burman method, and, finally, biomass and metal concentration were studied using the response surface methodology (RSM) to improve biosorption. The optimum uptake capacities for Co(II) ions by the three biosorbents used were obtained for initial metal concentrations of 35-40 mg L-1 and an initial biomass of 6 mg. For Ni(II) ions, the optimum uptake capacity was achieved with 1 mg of initial biomass for S. marcescens C-1 and C-19, and with 7 mg for S. marcescens C-16, with initial concentrations of 20-50 mg L-1. The results obtained demonstrate the viability of native S. marcescens strains as biosorbents for Ni(II) and Co(II) removal. This study also contributes to our understanding of the potential uses of serpentine microbial populations for the design of environmental cleanup technologies.
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Affiliation(s)
- A Díaz
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), Calle 25 #455 Vedado, 10400, La Habana, Cuba
| | - J Marrero
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), Calle 25 #455 Vedado, 10400, La Habana, Cuba
| | - G Cabrera
- Biological and Enzymatic Reactors Group, Department of Chemical Engineering and Food Technology, Faculty of Sciences, 11510, Puerto Real, Cadiz, Spain
| | - O Coto
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), Calle 25 #455 Vedado, 10400, La Habana, Cuba
| | - J M Gómez
- Biological and Enzymatic Reactors Group, Department of Chemical Engineering and Food Technology, Faculty of Sciences, 11510, Puerto Real, Cadiz, Spain.
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Díaz A, Marrero J, Cabrera G, Coto O, Gómez JM. Biosorption of nickel, cobalt, zinc and copper ions by Serratia marcescens strain 16 in mono and multimetallic systems. Biodegradation 2022; 33:33-43. [PMID: 34657229 PMCID: PMC8803796 DOI: 10.1007/s10532-021-09964-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 10/05/2021] [Indexed: 12/18/2022]
Abstract
The metallurgical industry is one of the main sources of heavy metal pollution, which represents a severe threat to life. Metals can be removed from aqueous solutions by using microbial biomasses. This paper analyses the heavy metal biosorption capacity of Serratia marcescens strain 16 in single and multimetallic systems. The results obtained show that Co(II), Ni(II) and Zn(II) biosorption in monometallic systems is two to three times higher than in the presence of bi-metallic and multimetallic solutions. Fourier transform infrared spectroscopy confirmed that carbonyl, carboxyl and hydroxyl were the main functional groups, as well as the amide bands I and II involved in metal uptake, which are present in external structures of the bacterial cell. The results obtained demonstrated the viability of S. marcescens strain 16 as a biosorbent for the design of eco-friendly technologies for the treatment of waste liquor.
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Affiliation(s)
- A Díaz
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), 25th Street #455 Vedado, 10400, La Habana, Cuba
| | - J Marrero
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), 25th Street #455 Vedado, 10400, La Habana, Cuba
| | - G Cabrera
- Biological and Enzymatic Reactors Group, Department of Chemical Engineering and Food Technology, Faculty of Sciences, Puerto Real, 11510, Cádiz, Spain
| | - O Coto
- Metal Biotechnology Laboratory, Faculty of Biology, University of Havana (Cuba), 25th Street #455 Vedado, 10400, La Habana, Cuba
| | - J M Gómez
- Biological and Enzymatic Reactors Group, Department of Chemical Engineering and Food Technology, Faculty of Sciences, Puerto Real, 11510, Cádiz, Spain.
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Oyebamiji OO, Corcoran AA, Navarro Pérez E, Ilori MO, Amund OO, Holguin FO, Boeing WJ. Lead tolerance and bioremoval by four strains of green algae from Nigerian fish ponds. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102403] [Citation(s) in RCA: 1] [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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Dada AO, Adekola FA, Odebunmi EO, Ogunlaja AS, Bello OS. Two-three parameters isotherm modeling, kinetics with statistical validity, desorption and thermodynamic studies of adsorption of Cu(II) ions onto zerovalent iron nanoparticles. Sci Rep 2021; 11:16454. [PMID: 34385495 PMCID: PMC8361154 DOI: 10.1038/s41598-021-95090-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 07/06/2021] [Indexed: 11/28/2022] Open
Abstract
Adsorption of problematic copper ions as one of the endocrine disruptive substances from aqueous solution onto nanoscale zerovalent iron (nZVI) was studied. The high pore size 186.9268 Å, pore diameter 240.753 Å, and BET surface area 20.8643 m2 g−1 and pH(pzc) enlisted nZVI as an efficient nano-adsorbent for treatment of heavy metals from synthetic wastewater. SEM and EDX revealed the morphology and elemental distribution before and after adsorption. 98.31% removal efficiency was achieved at optimum adsorption operational parameters. Of all the thirteen isotherm models, equilibrium data were well fitted to Langmuir. Kinetics and mechanism data across the concentrations from 10 to 200 mg L−1 were analyzed by ten models. PSO best described kinetics data as confirmed by various statistical error validity models. The intraparticle diffusion model described that the intraparticle diffusion was not the only rate-limiting step. The adsorption mechanism was diffusion governed established by Bangham and Boyd models. Feasible, spontaneous, endothermic, and degree of randomness were reveal by the thermodynamic studies. Better desorption index and efficiency were obtained using HCl suggesting multiple mechanism processes. The performance of ZVI suggested it has a great potential for effective removal of endocrine disruptive cationic contaminant from wastewater.
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Affiliation(s)
- Adewumi O Dada
- Nanotechnology Laboratory, Industrial Chemistry Programme, Department of Physical Sciences, Landmark University, P.M.B.1001, Omu-Aran, Kwara State, Nigeria. .,Landmark University, Sustainable Development Goal (SDG) Group 6: Clean Water and Sanitation, Omu-Aran, Nigeria. .,Landmark University, Sustainable Development Goal (SDG) Group 11: Sustainable Cities and Communities, Omu-Aran, Nigeria.
| | - Folahan A Adekola
- Department of Industrial Chemistry, University of Ilorin, P.M.B. 1515, Ilorin, Nigeria
| | - Ezekiel O Odebunmi
- Department of Chemistry, University of Ilorin, P.M.B. 1515, Ilorin, Nigeria
| | - Adeniyi S Ogunlaja
- Department of Chemistry, Nelson Mandela Metropolitan University, P.O. Box 77000, Port Elizabeth, 6031, South Africa
| | - Olugbenga S Bello
- Nanotechnology Laboratory, Industrial Chemistry Programme, Department of Physical Sciences, Landmark University, P.M.B.1001, Omu-Aran, Kwara State, Nigeria.,Department of Pure and Applied Chemistry, Ladoke Akintola University of Technology, P.M.B 4000, Ogbomosho, Oyo State, Nigeria
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Mo Y, Zhang Y, Vincent T, Faur C, Guibal E. Investigation of mercury(II) and copper(II) sorption in single and binary systems by alginate/polyethylenimine membranes. Carbohydr Polym 2021; 257:117588. [PMID: 33541633 DOI: 10.1016/j.carbpol.2020.117588] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/14/2020] [Accepted: 12/28/2020] [Indexed: 12/15/2022]
Abstract
This study investigates Hg(II) and Cu(II) sorption in single and binary systems by alginate/polyethylenimine membranes. Batch experiments are conducted to assess the metal sorption performance. FTIR and SEM-EDX analyses are used to identify metal binding mechanism. The sorption kinetics are better fitted by the pseudo-second-order-equation compared to the pseudo-first-order-equation. Three isotherms are compared for fitting the sorption in mono-component solutions and the Sips model gives the best simulation of experimental data. The competitive-Sips model fits well sorption data in Hg-Cu binary solutions and finds that the Cu uptake is drastically reduced by Hg competition. Copper(II) uptake remains negligible at low pH whereas it increases with pH up to 6 because of material deprotonation. Mercury(II) sorption behaves differently, it slightly changes from pH 1 (qeq: 0.76 mmol g-1) to pH 6 (qeq: 0.84 mmol g-1) due to chloro-anion formation. Therefore, playing with the pH allows separating Hg(II) from Cu(II).
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Affiliation(s)
- Yayuan Mo
- College of Environment and Resources, Guangxi Normal University, Guilin, China; PCH, IMT Mines Ales, Ales, France.
| | | | | | - Catherine Faur
- IEM, Institut Européen des Membranes, Univ Montpellier, CNRS, ENSCM, Montpellier, France.
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Montroni D, Giusti G, Simoni A, Cau G, Ciavatta C, Marzadori C, Falini G. Metal ion removal using waste byssus from aquaculture. Sci Rep 2020; 10:22222. [PMID: 33335208 PMCID: PMC7746758 DOI: 10.1038/s41598-020-79253-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 10/21/2020] [Indexed: 11/08/2022] Open
Abstract
Byssus is a thread-like seafood waste that has a natural high efficiency in anchoring many metal ions thanks to its richness of diverse functional groups. It also has structural stability in extreme chemical, physical and mechanical conditions. The combination of these properties, absent in other waste materials, has novelty suggested its use as matrix for water remediation. Thus, pristine byssus, upon de-metalation, was studied to remove metal ions from ideal solutions at pH 4 and 7, as model chemical systems of industrial and environmental polluted waters, respectively. The byssus matrix's uptake of metal ions was determined by ICP-OES and its surface microstructure investigated by SEM. The results showed that the byssus matrix excellently uptakes metal ions slightly reorganizing its surface micro-structure. As example of its efficiency: 50 mg of byssus absorbed 21.7 mg·g-1 of Cd2+ from a 10 mM solution at pH 7. The adsorption isotherm models of Freundlich and Langmuir were mainly used to describe the system at pH 7 and pH 4, respectively. In conclusion, we showed that the byssus, a waste material that is an environmental issue, has the potential to purify polluted industrial and environmental waters from metal ions.
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Affiliation(s)
- Devis Montroni
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum, Università di Bologna, via Selmi 2, 40126, Bologna, Italy
| | - Giorgia Giusti
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum, Università di Bologna, via Selmi 2, 40126, Bologna, Italy
| | - Andrea Simoni
- DiSTA, Department of Science and Technology of Agriculture and Environment, Alma Mater Studiorum, Università di Bologna, via Fanin 40, 40127, Bologna, Italy
| | - Genny Cau
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum, Università di Bologna, via Selmi 2, 40126, Bologna, Italy
| | - Claudio Ciavatta
- DiSTA, Department of Science and Technology of Agriculture and Environment, Alma Mater Studiorum, Università di Bologna, via Fanin 40, 40127, Bologna, Italy
| | - Claudio Marzadori
- DiSTA, Department of Science and Technology of Agriculture and Environment, Alma Mater Studiorum, Università di Bologna, via Fanin 40, 40127, Bologna, Italy
| | - Giuseppe Falini
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum, Università di Bologna, via Selmi 2, 40126, Bologna, Italy.
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Fernández-López JA, Angosto JM, Roca MJ, Doval Miñarro M. Taguchi design-based enhancement of heavy metals bioremoval by agroindustrial waste biomass from artichoke. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:55-63. [PMID: 30404069 DOI: 10.1016/j.scitotenv.2018.10.343] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 10/24/2018] [Accepted: 10/25/2018] [Indexed: 06/08/2023]
Abstract
The Taguchi method of designing experiments is based on a system of tabulated designs (arrays) that enables the maximum number of variables to be estimated in a neutral (orthogonal) balanced manner with a minimum number of experimental sets. Heavy metals remediation of aqueous streams is of special concern due to its highly toxic and persistent nature. Taguchi approach was used for enhanced bioadsorptive removal of Pb(II), Cu(II) and Cd(II) from aqueous solutions using agroindustrial waste biomass from globe artichoke as inexpensive sorbent. Sorbent biomass was characterized as to its chemical composition by infrared spectroscopy (FTIR), revealing the presence of hydroxyl, carboxyl, sulphonic and amine functional groups. Ranks of four factors (pH, temperature, sorbent dosage and initial metal concentration) at three levels each, in a L9 array were conducted, in batch sorption tests, for the individual metal ions of concern. The sorption capacity (qe) values were transformed into an accurate signal-to-noise (S/N) ratio for a "higher is better" response. The best conditions for individual heavy metal sorption were determined reaching up to 86.2 mg·g-1 for Pb, 35.8 mg·g-1 for Cd and 24.4 mg·g-1 for Cu. This paper also discusses the equilibria and kinetic aspects of the sorption process. Sorption isotherms were successfully described by the Sips model. In addition, the experimental data showed that the uptake kinetic profiles of the three metal ions closely fitted the pseudo-second order model. Conclusively, the agroindustrial waste biomass from globe artichoke represents a potentially viable sorbent for the bioremoval of Pb(II), Cu(II) and Cd(II) ions from aqueous systems.
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Affiliation(s)
- José A Fernández-López
- Technical University of Cartagena (UPCT), Department of Chemical and Environmental Engineering, Paseo Alfonso XIII, 52, 30203 Cartagena, Murcia, Spain.
| | - José M Angosto
- Technical University of Cartagena (UPCT), Department of Chemical and Environmental Engineering, Paseo Alfonso XIII, 52, 30203 Cartagena, Murcia, Spain
| | - María J Roca
- Technical University of Cartagena (UPCT), Department of Chemical and Environmental Engineering, Paseo Alfonso XIII, 52, 30203 Cartagena, Murcia, Spain
| | - Marta Doval Miñarro
- Technical University of Cartagena (UPCT), Department of Chemical and Environmental Engineering, Paseo Alfonso XIII, 52, 30203 Cartagena, Murcia, Spain
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Rosales E, Ferreira L, Sanromán MÁ, Tavares T, Pazos M. Enhanced selective metal adsorption on optimised agroforestry waste mixtures. BIORESOURCE TECHNOLOGY 2015; 182:41-49. [PMID: 25681794 DOI: 10.1016/j.biortech.2015.01.094] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/19/2015] [Accepted: 01/23/2015] [Indexed: 06/04/2023]
Abstract
The aim of this work is to ascertain the potentials of different agroforestry wastes to be used as biosorbents in the removal of a mixture of heavy metals. Fern (FE), rice husk (RI) and oak leaves (OA) presented the best removal percentages for Cu(II) and Ni(II), Mn(II) and Zn(II) and Cr(VI), respectively. The performance of a mixture of these three biosorbents was evaluated, and an improvement of 10% in the overall removal was obtained (19.25mg/g). The optimum mixture proportions were determined using simplex-centroid mixture design method (FE:OA:RI=50:13.7:36.3). The adsorption kinetics and isotherms of the optimised mixture were fit by the pseudo-first order kinetic model and Langmuir isotherm. The adsorption mechanism was studied, and the effects of the carboxylic, hydroxyl and phenolic groups on metal-biomass binding were demonstrated. Finally, the recoveries of the metals using biomass were investigated, and cationic metal recoveries of 100% were achieved when acidic solutions were used.
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Affiliation(s)
- Emilio Rosales
- Department of Chemical Engineering, University of Vigo, Isaac Newton Building, Campus As Lagoas Marcosende, 36310 Vigo, Spain; Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Laura Ferreira
- Department of Chemical Engineering, University of Vigo, Isaac Newton Building, Campus As Lagoas Marcosende, 36310 Vigo, Spain.
| | - M Ángeles Sanromán
- Department of Chemical Engineering, University of Vigo, Isaac Newton Building, Campus As Lagoas Marcosende, 36310 Vigo, Spain.
| | - Teresa Tavares
- Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Marta Pazos
- Department of Chemical Engineering, University of Vigo, Isaac Newton Building, Campus As Lagoas Marcosende, 36310 Vigo, Spain.
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Chowdhury ZZ, Hasan MR, Abd Hamid SB, Marlina Samsudin E, Zain SM, Khalid K. Catalytic pretreatment of biochar residues derived from lignocellulosic feedstock for equilibrium studies of manganese, Mn(ii) cations from aqueous solution. RSC Adv 2015. [DOI: 10.1039/c4ra09709b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this research, activated biochar has been produced by a base catalytic approach for removal of Mn(ii) cations from waste water.
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Affiliation(s)
- Zaira Zaman Chowdhury
- Nanotechnology and Catalysis Research Center (NANOCAT)
- University Malaya
- Kuala Lumpur 50603
- Malaysia
- Department of Chemistry
| | - Md. Rakibul Hasan
- Nanotechnology and Catalysis Research Center (NANOCAT)
- University Malaya
- Kuala Lumpur 50603
- Malaysia
| | - Sharifah Bee Abd Hamid
- Nanotechnology and Catalysis Research Center (NANOCAT)
- University Malaya
- Kuala Lumpur 50603
- Malaysia
| | - Emy Marlina Samsudin
- Nanotechnology and Catalysis Research Center (NANOCAT)
- University Malaya
- Kuala Lumpur 50603
- Malaysia
| | | | - Khalisanni Khalid
- Department of Chemistry
- Faculty of Science
- University Malaya
- Kuala Lumpur 50603
- Malaysia
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Torres E, Mera R, Herrero C, Abalde J. Isotherm studies for the determination of Cd (II) ions removal capacity in living biomass of a microalga with high tolerance to cadmium toxicity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:12616-12628. [PMID: 24954392 DOI: 10.1007/s11356-014-3207-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 06/12/2014] [Indexed: 06/03/2023]
Abstract
The biosorption characteristics of Cd (II) ions using the living biomass of the marine diatom Phaeodactylum tricornutum were investigated. This microalga is a highly tolerant species to cadmium toxicity; for this reason, it is interesting to know its potential for use in the removal of this metal. The use of living biomass offers better possibilities than that of dead biomass since cadmium can also be bioaccumulated inside the cells. For this purpose, tolerant species are necessary. P. tricornutum is within this category with an EC50,96h of 19.1 ± 3.5 mg Cd (II)/L, and in the present manuscript, it is demonstrated that this microalga has a very good potential for bioremediation of Cd (II) ions in saline habitats. Cadmium removed by the cells was divided into three fractions: total, intracellular and bioadsorbed. The experiments were conducted for 96 h in natural seawater with a concentration range of 1-100 mg Cd (II)/L. Each fraction was characterized every 24 h by sorption isotherms. The experimental isotherm data were analyzed using the Langmuir, Freundlich, Dubinin-Radushkevich and Temkin equations. The biosorption was well described by Langmuir isotherm followed by Freundlich. The worst model was Temkin. The biosorption capacity of this microalga for Cd (II) ions was found to be 67.1 ± 3.2 mg/g after 96 h with approximately 40 % of this capacity in the intracellular fraction. The bioconcentration factor determined was 2,204.7 after 96 h and with an initial Cd (II) concentration of 1 mg/L.
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Affiliation(s)
- Enrique Torres
- Laboratorio de Microbiología, Facultad de Ciencias, Universidade da Coruña, Alejandro de La Sota, No. 1, 15008, La Coruña, Spain,
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Wang H, Jin XY, Wu HB. Adsorption and desorption properties of modified feather and feather/PP melt-blown filter cartridge of lead ion (Pb 2+). J Appl Polym Sci 2014. [DOI: 10.1002/app.41555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hong Wang
- Key Laboratory of Textiles Science and Technology, Ministry of Education, College of Textiles, Donghua University; Shanghai 201620 China
| | - Xiang-Yu Jin
- Key Laboratory of Textiles Science and Technology, Ministry of Education, College of Textiles, Donghua University; Shanghai 201620 China
| | - Hai-Bo Wu
- Key Laboratory of Textiles Science and Technology, Ministry of Education, College of Textiles, Donghua University; Shanghai 201620 China
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Hu J, Shipley HJ. Regeneration of spent TiO2 nanoparticles for Pb (II), Cu (II), and Zn (II) removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:5125-5137. [PMID: 23354619 DOI: 10.1007/s11356-013-1502-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Accepted: 01/17/2013] [Indexed: 06/01/2023]
Abstract
Spent sorbents in water treatment processes have potential risks to the environment if released without proper treatment. The aim of this work was to investigate the potential regeneration of commercially prepared nano-TiO2 (anatase) for the removal of Pb (II), Cu (II), and Zn (II) by pH 2 and ethylenediaminetetraacetic acid (EDTA) solutions. The percent of metal adsorption/desorption decreased with the increasing number of regeneration cycles, and the extent of decrease varied for each metal. Competitive effects were observed for the adsorption/desorption of different metals when the nano-TiO2 was regenerated by EDTA solutions. Nano-TiO2 was able to treat simulated metal polluted water with greater than 94 % adsorption and greater than 92 % desorption after four cycles of regeneration using pH 2 solution. These results demonstrated that nano-TiO2 can be regenerated and reused using pH 2 solution compared to an EDTA solution for aquatic metal removal, which makes nanosorbents promising and economically and environmentally more attractive in the application of water purification.
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Affiliation(s)
- Jinxuan Hu
- Department of Civil and Environmental Engineering, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
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Wang J, Cheng C, Yang X, Chen C, Li A. A New Porous Chelating Fiber: Preparation, Characterization, and Adsorption Behavior of Pb(II). Ind Eng Chem Res 2013. [DOI: 10.1021/ie302183s] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jinnan Wang
- State Key Laboratory of Pollution
Control and Resource
Reuse, School of the Environment, Nanjing University, Nanjing 210046, People’s Republic of China
| | - Cheng Cheng
- State Key Laboratory of Pollution
Control and Resource
Reuse, School of the Environment, Nanjing University, Nanjing 210046, People’s Republic of China
| | - Xin Yang
- State Key Laboratory of Pollution
Control and Resource
Reuse, School of the Environment, Nanjing University, Nanjing 210046, People’s Republic of China
| | - Chen Chen
- State Key Laboratory of Pollution
Control and Resource
Reuse, School of the Environment, Nanjing University, Nanjing 210046, People’s Republic of China
| | - Aimin Li
- State Key Laboratory of Pollution
Control and Resource
Reuse, School of the Environment, Nanjing University, Nanjing 210046, People’s Republic of China
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14
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Adsorption Batch Studies on the Removal of Pb(II) Using Maize Tassel Based Activated Carbon. J CHEM-NY 2013. [DOI: 10.1155/2013/508934] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The demand for clean water is on the increase as rapid industrialization is still contributing to pollution. Nowadays, as water is the basic need for mankind, efforts have gathered momentum to decontaminate it in order to address the acute shortage of clean and pure water. Maize tassel was used as the precursor for making activated carbon for the adsorption of Pb(II) ions. The product obtained was characterized and utilized for the removal of Pb(II) from aqueous solutions over a wide range of initial metal ion concentration (10–50 mg/L), contact time (5–300 min), adsorbent dose (0.1–2.5 g), and pH (2–12). The optimum set of conditions for biosorption of Pb(II) ion were found to be initial concentration 10 mg/L, dosage 1.2 g, and pH 5.4. The adsorption data conformed to both the Langmuir and the Freundlich isotherms but fitted best into the Langmuir model. TheR2for Langmuir equation was 0.9997 and that for Freundlich was 0.9515. The Langmuir monolayer adsorption capacity of the activated carbon was calculated to be 37.31 mg/g. The results indicate that activated carbon might be used to effectively adsorb Pb(II) ions from wastewater treatment plants.
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Moyo M, Chikazaza L. Bioremediation of Lead(II) from Polluted Wastewaters Employing Sulphuric Acid Treated Maize Tassel Biomass. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/ajac.2013.412083] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Olguín EJ, Sánchez-Galván G. Heavy metal removal in phytofiltration and phycoremediation: the need to differentiate between bioadsorption and bioaccumulation. N Biotechnol 2012; 30:3-8. [DOI: 10.1016/j.nbt.2012.05.020] [Citation(s) in RCA: 124] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 05/22/2012] [Accepted: 05/25/2012] [Indexed: 11/29/2022]
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