Effects of dissolved oxygen, salinity, nitrogen and phosphorus on the release of heavy metals from coastal sediments

doi:10.1016/j.scitotenv.2019.02.288

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院海洋生物资源可持续利用重点实验室

	Effects of dissolved oxygen, salinity, nitrogen and phosphorus on the release of heavy metals from coastal sediments
	Diao, Zeng-Hui ; Liu, Jin-Jun ; Xu, Xiang-Rong ; Xie, Qun 1,2
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019
卷号	666 页码:894
关键词	Dissolved oxygen Salinity Nutrients Heavy metals Release Sediment
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.02.288
英文摘要	Great amounts of nutrients discharged into the urbanized coastal areas, which are continuously subject to violently anthropogenic metal contamination, will result in eutrophication and hypoxic episode. In order to study the effects of dissolved oxygen (DO), salinity, nitrogen and phosphorus on the release of six metals including Zn, Pb, Cd, Cu, As and Cr from coastal sediments, a series of 60-days microcosm experiments consisting of sediments and seawater were conducted. Severe hypoxia could result in the enhanced peak values of Pb, Cd, Cu and Cr concentrations in the overlying water. A higher level of water salinity could elevate the peak value of As concentration in water column, and a higher level of nitrogen could increase the peak value of Zn concentration in water. The exchange fluxes demonstrated that the diffusion from the sediments was a dominant process during the first 10 days, However, a relative equilibrium of adsorption and precipitation in the sediment-water interface reached during the later periods. In addition, the bioavailability of the studied metals in sediments was elevated under severe hypoxia, or a high level of water salinity, or high levels of nitrogen and phosphorus. The results of linear regression analysis suggested that higher metal bioavailability in sediments could facilitate the metal release, but the process could be restrained by the higher aqueous phosphorus due to the precipitation of metal phosphates. (C) 2019 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/17844]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, South China Sea Inst Oceanol,Inst South China Sea, Guangzhou 510301, Guangdong, Peoples R China 2.Guangdong Ocean Univ, Zhanjiang 524000, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Diao, Zeng-Hui,Liu, Jin-Jun,Xu, Xiang-Rong,et al. Effects of dissolved oxygen, salinity, nitrogen and phosphorus on the release of heavy metals from coastal sediments[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,666:894, 901.
APA	Diao, Zeng-Hui,Liu, Jin-Jun,Xu, Xiang-Rong,&Xie, Qun.(2019).Effects of dissolved oxygen, salinity, nitrogen and phosphorus on the release of heavy metals from coastal sediments.SCIENCE OF THE TOTAL ENVIRONMENT,666,894.
MLA	Diao, Zeng-Hui,et al."Effects of dissolved oxygen, salinity, nitrogen and phosphorus on the release of heavy metals from coastal sediments".SCIENCE OF THE TOTAL ENVIRONMENT 666(2019):894.