Characterization of Pb, Cu, and Cd adsorption on particulate organic matter in soil

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Characterization of Pb, Cu, and Cd adsorption on particulate organic matter in soil
	Guo, Xueyan; Zhang, Shuzhen; Shan, Xiao-Quan; Luo, Lei; Pei, Zhiguo; Zhu, Yong-Guan; Liu, Tao; Xie, Ya-ning; Gault, Andrew
刊名	ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
	2006
卷号	25 期号:9 页码:2366-2373
关键词	particulate organic matter heavy metals adsorption Fourier transform infrared spectroscopy X-ray absorption spectroscopy
英文摘要	Evidence exists for significant metal enrichment in particulate organic matter (POM) compared to other soil constituents, but the relevant mechanisms are poorly understood. In the present study, adsorption of the heavy metals Pb, Cu, and Cd on a loamy soil and on POM separated from this soil was investigated. The adsorption kinetic data can be well described with a pseudo-second order model, whereas the equilibrium data are well fitted by a Langmuir model. Adsorption isotherms and kinetics data, in addition to the influence of pH on metal adsorption, showed that POM had a much higher adsorption capacity for Pb, Cu, and Cd compared to the whole soil. Ionic strength effects on metal adsorption, Fourier transform infrared spectroscopy, x-ray absorption spectroscopy x-ray absorption spectroscopy including x-ray absorption near-edge structure and extended x-ray absorption fine-structure spectroscopy were employed to elucidate the adsorption mechanisms. The results suggested that Pb and Cu adsorption on POM was mainly through inner-sphere complexes with carboxyl and hydroxyl groups. Cadmium was possibly adsorbed via outer-sphere complexation, indicated by the influence of ionic strength on Cd adsorption.
WOS记录号	WOS:000239912100014
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/22842]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Guo, Xueyan,Zhang, Shuzhen,Shan, Xiao-Quan,et al. Characterization of Pb, Cu, and Cd adsorption on particulate organic matter in soil[J]. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,2006,25(9):2366-2373.
APA	Guo, Xueyan.,Zhang, Shuzhen.,Shan, Xiao-Quan.,Luo, Lei.,Pei, Zhiguo.,...&Gault, Andrew.(2006).Characterization of Pb, Cu, and Cd adsorption on particulate organic matter in soil.ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,25(9),2366-2373.
MLA	Guo, Xueyan,et al."Characterization of Pb, Cu, and Cd adsorption on particulate organic matter in soil".ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 25.9(2006):2366-2373.