Adsorption of toluene on various natural soils: Influences of soil properties, mechanisms, and model

doi:10.1016/j.scitotenv.2020.140104

	Adsorption of toluene on various natural soils: Influences of soil properties, mechanisms, and model
	Li, Yuan 1,2,3,4; Wei, Mingli 1,2,4,6; Liu, Lei 1,2,4,6; Xue, Qiang 1,2,4,6; Yu, Bowei 5
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-10-20
卷号	740 页码:10
关键词	Toluene adsorption Soil properties Thermodynamics Mechanism Model
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.140104
英文摘要	This study investigated toluene adsorption on natural soils. The linear partition model was found to represent the adsorption isotherm well (R-2 = 0.958-0.994), compared with the Freundlich model (R-2 = 0.901-0.991). Therefore, the coefficient, K-d, of the linear model indicated the adsorption capacity of soils A to F. Traditionally, K-d and the total organic carbon (TOC) content have a good linear relationship. However, this relationship was weak (correlation coefficient (r) = 0.689) when TOC values (8.43-12.9 mg/g) were low and dose. To correct this deviation, this study investigated the influences of physicochemical properties, such as special surface area, mineral composition, functional groups, pH, and potentials. As soils B and C consisted of a large amount of active clayey minerals (69.4% kaolinite and 79.3% nacrite, respectively) and rich functional groups, they demonstrated the strongest adsorption capacity. Additionally, the r for pH-Rd, zeta potential-Rd, and redox potential-K-d were high, at 0.806, 0.914, and 0.932, respectively. To explore adsorption mechanisms, the adsorption thermodynamic parameter (enthalpy) was used initially to determine the forces. Combined with the analysis of soil properties, the mechanisms identified were hydrophobic interaction and hydrogen-pi bonding, involving co-adsorption with water molecules. Based on all studies, the properties were quantified and simplified by the plastic limit (PL), and TOC was simplified by soil organic matter (SOM). Then, PL and SOM were weighted by the entropy-weight method to obtain the determination factor, DF, a logarithmic parameter to replace TOC. Finally, a new model describing toluene adsorption on natural soils was established and expressed as Ka 4.80 + 3.531Y. This new model had significantly improved the correlation between K-d and TOC (r = 0.933) and expanded the engineering adaptability. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Science Foundation for Distinguished Young Scholars[51625903] ; National Key Research and Development Program[2019YFC1804002] ; National Natural Science Foundation of China[51827814] ; National Natural Science Foundation of China[41702349] ; National Natural Science Foundation of China[41772342] ; National Natural Science Foundation of China[41977254] ; Youth Innovation Promotion Association CAS[2017376] ; Foundation for Innovative Research Groups of Hubei Province of China[2019CFA012] ; Wuhan Science and Technology Conversion Special Project[2018060403011348] ; Natural Science Foundation of Hubei Province[2017CFB203]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000562060200003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24698]
专题	中科院武汉岩土力学所
通讯作者	Wei, Mingli
作者单位	1.Hubei Prov Key Lab Contaminated Sludge & Soil Sci, Wuhan, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100000, Peoples R China 4.IRSM CAS HK Poly U Joint Lab Solid Waste Sci, Wuhan 430071, Peoples R China 5.Univ Sydney, Sch Civil Engn, Sydney, NSW 2008, Australia 6.Jiangsu Inst Zoneco Co Ltd, Yixing 214200, Peoples R China
推荐引用方式 GB/T 7714	Li, Yuan,Wei, Mingli,Liu, Lei,et al. Adsorption of toluene on various natural soils: Influences of soil properties, mechanisms, and model[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,740:10.
APA	Li, Yuan,Wei, Mingli,Liu, Lei,Xue, Qiang,&Yu, Bowei.(2020).Adsorption of toluene on various natural soils: Influences of soil properties, mechanisms, and model.SCIENCE OF THE TOTAL ENVIRONMENT,740,10.
MLA	Li, Yuan,et al."Adsorption of toluene on various natural soils: Influences of soil properties, mechanisms, and model".SCIENCE OF THE TOTAL ENVIRONMENT 740(2020):10.