Sorption Stability and Mechanism Exploration of Palygorskite as Immobilization Agent for Cd in Polluted Soil

doi:10.1007/s11270-014-2160-1

	Sorption Stability and Mechanism Exploration of Palygorskite as Immobilization Agent for Cd in Polluted Soil
	Han, Jun 1,2,3,4; Xu, Yingming 1; Liang, Xuefeng 2; Xu, Yuanjian
刊名	WATER AIR AND SOIL POLLUTION
	2014-10-01
卷号	225 期号:10 页码:13
关键词	Palygorskite Immobilization agent Cadmium Sorption stability Soil remediation
ISSN号	0049-6979
DOI	10.1007/s11270-014-2160-1
通讯作者	Xu, YJ (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Div Ecol & Environm Res Three Gorges, 266 Fangzheng Ave,Shuitu Hitech Ind Pk, Chongqing 400714, Peoples R China.
英文摘要	Clay minerals have been utilized for the remediation of heavy metal-polluted soil. However, information on the remediation stability of various clay minerals with different performances is limited. In this study, a kind of palygorskite (PAL) with a sorption amount for Cd2+ about 40 mg/g, which is much larger than common minerals, was selected as amendment for in situ immobilization field demonstration. Besides, sorption stability which is essential for remediation was investigated in an ideal solid solution system by sorption and desorption behaviors of Cd2+ on PAL, including isotherms, kinetics, and various stimulated environmental factors such as pH, temperature, and background electrolytes. The calculated thermodynamic parameters confirmed the sorption process was endothermic and driven by entropy changes. Only minimal desorption was caused by stimulated irrigation or runoff and acid rain. The temperature, pH, and background electrolyte dependence confirmed that the sorption of Cd2+ on PAL was stable. Various characterization results including X-ray photoelectron spectroscopy (XPS), scanning electron microscopy-energy dispersive spectrometry (SEM-EDS) mapping, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) confirmed the sorption mechanisms were surface precipitation of CdCO3 and surface complexation with hydroxyl groups.
资助项目	National Natural Science Foundation of China[21177068] ; Program for Distinguishing Scholar and Innovative Team of MOA[2012-jcrc-xym] ; Special Fund for Agro-scientific Research in the Public Interest[201203045] ; 100 Talents Program of the Chinese Academy of Sciences[Y33Z050M10] ; Special Fund for Graduate Student Social Survey of the Chinese Academy of Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000342427000026
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/1164]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Xu, Yuanjian
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Div Ecol & Environm Res Three Gorges, Chongqing 400714, Peoples R China 2.Minist Agr, Agroenvironm Protect Inst, Key Lab Original Environm Qual MOA, Tianjin 300191, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Han, Jun,Xu, Yingming,Liang, Xuefeng,et al. Sorption Stability and Mechanism Exploration of Palygorskite as Immobilization Agent for Cd in Polluted Soil[J]. WATER AIR AND SOIL POLLUTION,2014,225(10):13.
APA	Han, Jun,Xu, Yingming,Liang, Xuefeng,&Xu, Yuanjian.(2014).Sorption Stability and Mechanism Exploration of Palygorskite as Immobilization Agent for Cd in Polluted Soil.WATER AIR AND SOIL POLLUTION,225(10),13.
MLA	Han, Jun,et al."Sorption Stability and Mechanism Exploration of Palygorskite as Immobilization Agent for Cd in Polluted Soil".WATER AIR AND SOIL POLLUTION 225.10(2014):13.