Effects of co-ion initial concentration ratio on removal of Pb2+ from aqueous solution by modified sugarcane bagasse |
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Authors: | Jing Zhu Jun-xia Yu Jia-dong Chen Jie-sen Zhang Jia-qi Tang Yuan-lai Xu Yue-fei Zhang Ru-an Chi |
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Affiliation: | 1.Hubei Novel Reactor & Green Chemical Technology Key Laboratory, Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan,China |
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Abstract: | A modified sugarcane bagasse (SCB) fixed bed column was used to remove Pb2+ from aqueous solution. To determine the optimal condition for Pb2+ separation, Ca2+ was chosen as the model interfering ion, and effects of Ca2+ and Pb2+ initial concentration ratio (C 0 Ca : C 0 Pb ) on the adsorption of Pb2+ were investigated. Results showed that adsorption amount ratio of Ca2+ and Pb2+ (q e Ca : q e Pb ) had a good linear relationship with C 0 Ca : C 0 Pb . Mass ratio of Pb2+ absorbed on the modified SCB was higher than 95% at C 0 Ca : C 0 Pb <1.95, illustrating that Pb2+ could be selectively removed from aqueous solution. To verify that, simulated waste water containing co-ions of K+, Na+, Cd2+ and Ca2+ was treated, and results showed that the equilibrium amount of Pb2+, K+, Na+, Cd2+ and Ca2+ adsorbed was 134.14, 0.083, 0.058, 1.28, and 1.28mg g?1, respectively, demonstrating that the modified SCB could be used to remove Pb2+ from aqueous solution in the investigated range. |
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