Study on the waste beer yeast used for synchronous adsorption of Pb2+, Zn2+, Cd2+ from aqueous solutions

doi:10. 11894/1005-829x. 2013. 33(9). 27

INDUSTRIAL WATER TREATMENT ›› 2013, Vol. 33 ›› Issue (9): 27-30. doi: 10. 11894/1005-829x. 2013. 33(9). 27

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Study on the waste beer yeast used for synchronous adsorption of Pb²⁺, Zn²⁺, Cd²⁺ from aqueous solutions

Peng Xi, Dai Youzhi, Li Xiaona, Liu Jian, Hu Wei, Chen Qing

Key Laboratory of Heavy Metal Pollution Control, College of Hunan Province, Department of Environmental Science & Engineering, Xiangtan University, Xiangtan 411105, China

Received:2013-06-20 Online:2013-09-20 Published:2013-10-17

废啤酒酵母同步吸附水中Pb²⁺、Zn²⁺、Cd²⁺的研究

彭喜, 戴友芝, 李小娜, 刘坚, 胡维, 陈庆

湘潭大学环境科学与工程系, 重金属污染控制湖南省普通高等学校重点实验室, 湖南湘潭 411105

通讯作者: 戴友芝, 教授。E-mail：daiyouzhi202@163.com。 E-mail:daiyouzhi202@163.com
作者简介:彭喜(1988- ), 硕士。E-mail：pengtianxi3@163.com。
基金资助:
国家十一五“水体污染控制与治理”科技重大专项增补课题(2010ZX07212-008)

Abstract

Abstract:

Waste beer yeast has been used for the adsorption treatment of wastewater containing Pb²⁺, Zn²⁺, Cd²⁺ synchronously. The effects of the factors, such as initial pH, reaction time and initial concentration on removing rate are investigated, and its adsorptive dynamics is discussed. The results show that the sequence of synchronous adsorptive removing rates caused by waste bear yeast on Pb²⁺, Zn²⁺, Cd²⁺ is still Pb²⁺＞Cd²⁺＞Zn²⁺. There exists competitive adsorption among the three kinds of heavy metal ions. The correlation coefficient of pseudo-secondary dynamics equation is R²＞0.99, having better fittings with Pb²⁺ under low concentration condition. The adsorption rate is jointly controlled by internal diffusion and liquid membrane diffusion.

Key words: waste beer yeast, synchronous adsorption, competitive adsorption, heavy metal ions

摘要：

利用废啤酒酵母同步吸附处理含Pb²⁺、Zn²⁺、Cd²⁺废水, 考察了初始pH、反应时间和初始浓度等因素对去除率的影响, 并对吸附动力学进行探讨。结果表明:废啤酒酵母对Pb²⁺、Zn²⁺、Cd²⁺同步吸附去除率大小依次为Pb²⁺>Cd²⁺>Zn²⁺;三者之间存在竞争吸附;拟二级动力学方程相关系数R²>0.99, 对Pb²⁺和在低浓度条件下拟合情况更好, 内扩散和液膜扩散联合控制吸附速率。

关键词: 废啤酒酵母, 同步吸附, 竞争吸附, 重金属离子

CLC Number:

X703. 1

Peng Xi, Dai Youzhi, Li Xiaona, Liu Jian, Hu Wei, Chen Qing. Study on the waste beer yeast used for synchronous adsorption of Pb²⁺, Zn²⁺, Cd²⁺ from aqueous solutions[J]. INDUSTRIAL WATER TREATMENT, 2013, 33(9): 27-30.

彭喜, 戴友芝, 李小娜, 刘坚, 胡维, 陈庆. 废啤酒酵母同步吸附水中Pb²⁺、Zn²⁺、Cd²⁺的研究[J]. 工业水处理, 2013, 33(9): 27-30.

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Study on the waste beer yeast used for synchronous adsorption of Pb²⁺, Zn²⁺, Cd²⁺ from aqueous solutions

废啤酒酵母同步吸附水中Pb²⁺、Zn²⁺、Cd²⁺的研究

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