Competitive adsorption of heavy metals onto sesame straw biochar in aqueous solutions

被引：528
|
作者：
Park, Jong-Hwan [1 ,2 ]
Ok, Yong Sik [3 ,4 ]
Kim, Seong-Heon [1 ,2 ]
Cho, Ju-Sik [5 ]
Heo, Jong-Soo [1 ,2 ]
Delaune, Ronald D. [6 ]
Seo, Dong-Cheol [5 ]
机构：
[1] Gyeongsang Natl Univ, Div Appl Life Sci, Program BK21, Jinju 660701, South Korea
[2] Gyeongsang Natl Univ, Inst Agr & Life Sci, Jinju 660701, South Korea
[3] Kangwon Natl Univ, Korea Biochar Res Ctr, Chunchon 200701, South Korea
[4] Kangwon Natl Univ, Dept Environm Biol, Chunchon 200701, South Korea
[5] Sunchon Natl Univ, Dept Bioenvironm Sci, Sunchon 540950, South Korea
[6] Louisiana State Univ, Sch Coast & Environm, Dept Oceanog & Costal Sci, Baton Rouge, LA 70803 USA
来源：
CHEMOSPHERE | 2016年 / 142卷
基金：
新加坡国家研究基金会;
关键词：
Sesame straw; Biochar; Competitive adsorption; Langmuir isotherm; Freundlich isotherm; Three-dimension simulation; ACTIVATED CARBON; LOW-COST; REMOVAL; WATER; IONS; ADSORBENT; SORPTION; CADMIUM; COPPER; WASTE;
D O I：
10.1016/j.chemosphere.2015.05.093
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Objective of this research was to evaluate adsorption of heavy metals in mono and multimetal forms onto sesame straw biochar (SSB). Competitive sorption of metals by SSB has never been reported previously. The maximum adsorption capacities (mg g(-1)) of metals by SSB were in the order of Pb (102) >> Cd (86) >> Cr (65) > Cu (55) >> Zn (34) in the monometal adsorption isotherm and Pb (88) >> Cu (40) >> Cr (21) > Zn (7) >= Cd (5) in the multimetal adsorption isotherm. Based on data obtained from the distribution coefficients, Freundlich and Langmuir adsorption models, and three-dimensional simulation, multimetal adsorption behaviors differed from monometal adsorption due to competition. Especially, during multimetal adsorption, Cd was easily exchanged and substituted by other metals. Further competitive adsorption studies are necessary in order to accurately estimate the heavy metal adsorption capacity of biochar in natural environments. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：77 / 83
页数：7
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