title: Adsorption of Cd, Cu and Zn from aqueous solutions onto ferronickel slag under different potentially toxic metal combination.
abstract: Adsorption characteristics of potentially toxic metals in single- and multi-metal forms onto ferronickel slag were evaluated. Competitive sorption of metals by ferronickel slag has never been reported previously. The maximum adsorption capacities of toxic metals on ferronickel were in the order of Cd (10.2 mg g(-1)) > Cu (8.4 mg g(-1)) > Zn (4.4 mg g(-1)) in the single-metal adsorption isotherm and Cu (6.1 mg g(-1)) >> Cd (2.3 mg g(-1)) > Zn (0.3 mg g(-1)) in the multi-metal adsorption isotherm. In comparison with single-metal adsorption isotherm, the reduction rates of maximum toxic metal adsorption capacity in the multi-metal adsorption isotherm were in the following order of Zn (93%) > Cd (78%) >> Cu (27%). The Freundlich isotherm provides a slightly better fit than the Langmuir isotherm equation using ferronickel slag for potentially toxic metal adsorption. Multi-metal adsorption behaviors differed from single-metal adsorption due to competition, based on data obtained from Freundlich and Langmuir adsorption models and three-dimensional simulation. Especially, Cd and Zn were easily exchanged and substituted by Cu during multi-metal adsorption. Further competitive adsorption studies are necessary in order to accurately estimate adsorption capacity of ferronickel slag for potentially toxic metals in natural environments.
authors.affiliation: Division of Applied Life Science (BK21 Plus) & Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea E-mail: drseodc@gmail.com.
authors.forename: Jong-Hwan
authors.initials: JH
authors.lastname: Park
authors.affiliation: Division of Applied Life Science (BK21 Plus) & Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea E-mail: drseodc@gmail.com.
authors.forename: Seong-Heon
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Bio-Environmental Sciences, Sunchon National University, Suncheon, 540-950, Republic of Korea.
authors.forename: Se-Won
authors.initials: SW
authors.lastname: Kang
authors.affiliation: Department of R&D, Hyoseok, Co., Ltd, 857 Kumho-dong, Gwangyang, Republic of Korea.
authors.forename: Byung-Hwa
authors.initials: BH
authors.lastname: Kang
authors.affiliation: Department of Bio-Environmental Sciences, Sunchon National University, Suncheon, 540-950, Republic of Korea.
authors.forename: Ju-Sik
authors.initials: JS
authors.lastname: Cho
authors.affiliation: Division of Applied Life Science (BK21 Plus) & Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea E-mail: drseodc@gmail.com.
authors.forename: Jong-Soo
authors.initials: JS
authors.lastname: Heo
authors.affiliation: Department of Oceanography and Costal Sciences, School of the Coast and Environment, Louisiana State University, Baton Rouge, LA 70803, USA.
authors.forename: Ronald D
authors.initials: RD
authors.lastname: Delaune
authors.affiliation: Korea Biochar Research Center & Department of Biological Environment, Kangwon National University, Chuncheon 200-701, Republic of Korea.
authors.forename: Yong Sik
authors.initials: YS
authors.lastname: Ok
authors.affiliation: Division of Applied Life Science (BK21 Plus) & Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea E-mail: drseodc@gmail.com.
authors.forename: Dong-Cheol
authors.initials: DC
authors.lastname: Seo
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D000075322:Heavy Metal Poisoning; D007501:Iron / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D011041:Poisoning; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis; D015032:Zinc / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium; C030616:ferronickel; D003300:Copper; D009532:Nickel; D007501:Iron; D015032:Zinc