水资源与水工程学报

文章摘要

凌静,何少华,林振波,夏勇锋.天然硅藻土吸附废水中Cd²⁺和Pb²⁺的热力学研究Journal of Water Resources and Water Engineering[J].,2012,23(6):193-195

天然硅藻土吸附废水中Cd²⁺和Pb²⁺的热力学研究

Thermodynamic study on the adsorption of Cd²⁺ and Pb²⁺ in wastewater by natural diatomite

Received:July 04, 2012 Revised:July 26, 2012

DOI：

中文关键词: 天然硅藻土 Cd²⁺ Pb²⁺ 吸附吸附热力学

英文关键词: natural diatomite Cd²⁺ Pb²⁺ adsorption adsorption thermodynamic

基金项目:

Author Name	Affiliation
LING Jing	School of Urban Construction, University of South China, Hengyang 421001, China [KH*3D]
HE Shaohua	School of Urban Construction, University of South China, Hengyang 421001, China [KH*3D]
LIN Zhenbo	School of Urban Construction, University of South China, Hengyang 421001, China [KH*3D]
XIA Yongfeng	School of Urban Construction, University of South China, Hengyang 421001, China [KH*3D]

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中文摘要:

用天然硅藻土吸附废水中Cd²⁺和Pb²⁺两种重金属离子,探讨了天然硅藻土对Cd²⁺和Pb²⁺的吸附等温式和吸附热力学规律。结果表明:天然硅藻土对Cd²⁺和Pb²⁺的平衡吸附量随温度的升高而增加。两种重金属离子的吸附等温式都与Langmuir方程符合更好。由热力学参数可知吸附过程是自发、吸热的过程。

英文摘要:

Natural diatomite was used to adsorb Cd²⁺ and Pb²⁺ from wastewater. The adsorption capabilities such as adsorption isotherms and thermodynamics of Cd²⁺ and Pb²⁺ by natural diatomite have been investigated. The results demonstrated that the amount of equilibrium adsorption increases with the increase of temperature. The adsorption isotherms of two heavy metal ions accord with the Langmuir equation better. The thermodynamic parameters are showed that the adsorption process is spontaneous and endothermic.

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