Relationship between heavy metals and dissolved organic matter released from sediment by bioturbation/bioirrigation

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Relationship between heavy metals and dissolved organic matter released from sediment by bioturbation/bioirrigation
	He, Yi; Men, Bin; Yang, Xiaofang; Li, Yaxuan; Xu, Hui; Wang, Dongsheng
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2019
卷号	75 页码:216-223
关键词	Bioturbation/bioirrigation Heavy metal Sediment DOM
ISSN号	1001-0742
英文摘要	Organic matter (OM) is an important component of sediment. Bioturbation/bioirrigation can remobilize OM and heavy metals that were previously buried in the sediment. The remobilization of buried organic matter, thallium (Tl), cadmium (Cd), copper (Cu) and zinc (Zn) from sediment was studied in a laboratory experiment with three organisms: tubificid, chironomid larvae and loach. Results showed that bioturbation/bioirrigation promoted the release of dissolved organic matter (DOM) and dissolved Tl, Cd, Cu and Zn, but only dissolved Zn concentrations decreased with exposure time in overlying water. The presence of organisms altered the compositions of DOM released from sediment, considerably increasing the percentage of fulvic acid-like materials (FA) and humic acid-like materials (HA). In addition, bioturbation/bioirrigation accelerated the growth and reproduction of bacteria to enhance the proportion of soluble microbial byproduct-like materials (SMP). The DOM was divided into five regions in the three-dimensional excitation emission matrix (3D-EEM), and each part had different correlation with the dissolved heavy metal concentrations. Dissolved Cu had the best correlation with each of the DOM compositions, indicating that Cu in the sediment was in the organic-bound form. Furthermore, the organism type and heavy metal characteristics both played a role in influencing the remobilization of heavy metal. (c) 2018 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43111]
专题	生态环境研究中心_环境水质学国家重点实验室
作者单位	Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	He, Yi,Men, Bin,Yang, Xiaofang,et al. Relationship between heavy metals and dissolved organic matter released from sediment by bioturbation/bioirrigation[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2019,75:216-223.
APA	He, Yi,Men, Bin,Yang, Xiaofang,Li, Yaxuan,Xu, Hui,&Wang, Dongsheng.(2019).Relationship between heavy metals and dissolved organic matter released from sediment by bioturbation/bioirrigation.JOURNAL OF ENVIRONMENTAL SCIENCES,75,216-223.
MLA	He, Yi,et al."Relationship between heavy metals and dissolved organic matter released from sediment by bioturbation/bioirrigation".JOURNAL OF ENVIRONMENTAL SCIENCES 75(2019):216-223.