Biosorption of copper ions from aqueous solution using rape straw powders: Optimization, equilibrium and kinetic studies

Ecotoxicology and Environmental Safety
Xin LiuWei-Zhong Chen

Abstract

In this paper, the adsorption behaviors of Cu(II) from the aqueous solution using rape straw powders were studied. The effects of initial Cu(II) concentration, pH range and absorbent dosage on the adsorption efficiency of Cu(II) by rape straw powder were investigated by Box-Behnken Design based on response surface methodology. The values of coefficient constant of the nonlinear models were 0.9997, 0.9984 and 0.9944 for removal Cu(II) from aqueous solution using rape straw shell, seed pods and straw pith core, respectively, which could navigate the design space for various factors on effects of biosorption Cu(II) from aqueous solution. The various factors of pH and biosorbents dosage were the key factors that affecting the removal efficiency of Cu(II) from aqueous solution. The biosorption equilibrium data presented its favorable monolayer adsorption Cu(II) onto shell, seed pods and straw pith core, respectively. The pseudo-second order kinetic model was the proper approach to determine the adsorption kinetics. The biosorption of Cu(II) onto surfaces of rape straw powders were confirmed and ion-exchanged in the adsorption process by energy dispersive spectrometer. The critical groups, -OH, -CH, -NH3+, -CH3, -NH and -C-O, exhibit...Continue Reading

Citations

Jan 9, 2019·Environmental Science and Pollution Research International·Mingyang Song, Min Li
Sep 9, 2019·Environmental Science and Pollution Research International·Xin LiuZhao-Qiong Chen
Dec 20, 2018·Environmental Science and Pollution Research International·Bahman RamavandiFatemeh Teimori
Jun 1, 2018·Bioinorganic Chemistry and Applications·Londolani C MaremeniVusumzi E Pakade
Dec 20, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Khan Malook, Hamayun Khan
Nov 5, 2019·The Science of the Total Environment·Ruili GaoGuoyong Huang
Jun 22, 2021·Journal of Hazardous Materials·Shanshan LinMingxin Huo
Oct 6, 2021·Journal of Basic Microbiology·Peraman MuthukumaranJeyaseelan Aravind

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