Molecular understanding of dissolved black carbon sorption in soil-water environment

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

	Molecular understanding of dissolved black carbon sorption in soil-water environment
	Luo, Lei ; Chen, Zien ; Lv, Jitao ; Cheng, Yuan ; Wu, Tong ; Huang, Rixiang
刊名	WATER RESEARCH
	2019-05-01
卷号	154 页码:210-216
关键词	Dissolved organic carbon Dissolved organic nitrogen Dissolved organic sulfur Molecular composition Fractionation
ISSN号	0043-1354
英文摘要	Dissolved black carbon (DBC) involves in many biogeochemical processes in both terrestrial and aquatic environments. About 26.5 Tg of charcoal- or black carbon-derived DBC was released into aquatic environments annually, accounting to similar to 10% of the global riverine flux of dissolved organic carbon (DOC). Yet the sorption behaviors of DBC and their effects on water quality in soil-water environment are poorly understood. Here we examined the molecular composition variations of DOC induced by the sorption of two biochar-derived DBCs (pyrolyzed at 300 degrees C and 500 degrees C) on three contrasting soils. The DBCs were adsorbed mainly through competitive displacement of soil surface functional groups and co-sorption with soil indigenous DOC, which varied with soil properties and the aromaticity of the DBCs. Ultra-high resolution mass spectrometry analysis indicated that compounds with rich oxygen content or unsaturated structures such as tannins and unsaturated aromatics from both DBC and soil DOC, were preferentially adsorbed on the soils in the presence of DBC. In contrast, compounds with high aromatic structures including condensed aromatics and lignins were concentrated in the aquatic phase. Molecular fractionation also occurred to the heteroatomic compounds during the sorption, and the heteroatomic dissolved organic sulphur in the DBCs was easier to be adsorbed relative to dissolved organic nitrogen. Our results suggest that DBC sorption in soil-water environment could have important implications for water quality by altering DOC molecular composition and decreasing DOC molecular diversity at the soil-water interface. This study provides essential information for understanding the behavior of DBC in the environments. (C) 2019 Published by Elsevier Ltd.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42979]
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
作者单位	1.Hebei Univ Sci & Technol, Sch Environm Sci & Engn, Shijiazhuang 050018, Hebei, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
推荐引用方式 GB/T 7714	Luo, Lei,Chen, Zien,Lv, Jitao,et al. Molecular understanding of dissolved black carbon sorption in soil-water environment[J]. WATER RESEARCH,2019,154:210-216.
APA	Luo, Lei,Chen, Zien,Lv, Jitao,Cheng, Yuan,Wu, Tong,&Huang, Rixiang.(2019).Molecular understanding of dissolved black carbon sorption in soil-water environment.WATER RESEARCH,154,210-216.
MLA	Luo, Lei,et al."Molecular understanding of dissolved black carbon sorption in soil-water environment".WATER RESEARCH 154(2019):210-216.