The equilibria of bisolute sorption on soil

	The equilibria of bisolute sorption on soil
	Baohua Xiao; Weilin Huang
	2011
发表期刊	Chemosphere
卷号	83 期号:7 页码:1005-1013
摘要	The goal of this study was to investigate the effects of both concentration levels and loading sequence or contamination history of each pollutant on the equilibrium sorption of mixed organic pollutants on soils. We measured binary sorption equilibria for a soil using ten concentration levels for both phenanthrene and naphthalene. Both solutes were either simultaneously loaded or sequentially loaded (i.e., the second sorbate was loaded after the sorption of the first sorbate had attained equilibrium) on soil. The results showed different competitive sorption equilibria between phenanthrene and naphthalene. In the presence of phenanthrene and regardless of loading sequence, naphthalene exhibited consistently lower sorption capacities and the ideal adsorbed solution theory (IAST) slightly underestimates the naphthalene sorption equilibria. Conversely, the sorption equilibria of phenanthrene in the presence of naphthalene depended upon the loading sequence of the two sorbates on the soil. Little competition from naphthalene on the sorption equilibria of phenanthrene was observed when phenanthrene was loaded either simultaneously with or sequentially after naphthalene, but appreciable competition from naphthalene was observed when the soil had been pre-contaminated with phenanthrene. IAST slightly underestimates the phenanthrene sorption equilibria observed in the latter system, but it cannot estimate the phenanthrene sorption equilibria in the former two systems. We proposed that adsorption on internal surfaces of ink-bottle shaped pores within relatively flexible sorbent matrix may have caused the competitive sorption phenomena observed in this study. The study suggests that contamination history may have strong influence on the equilibrium sorption of organic pollutant mixtures.
关键词	Competitive Sorption Contamination History Phenanthrene Naphthalene Soil
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/7003
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Baohua Xiao,Weilin Huang. The equilibria of bisolute sorption on soil[J]. Chemosphere,2011,83(7):1005-1013.
APA	Baohua Xiao,&Weilin Huang.(2011).The equilibria of bisolute sorption on soil.Chemosphere,83(7),1005-1013.
MLA	Baohua Xiao,et al."The equilibria of bisolute sorption on soil".Chemosphere 83.7(2011):1005-1013.

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