Nutrients in overlying water affect the environmental behavior of heavy metals in coastal sediments

doi:10.1016/j.envres.2023.117135

	Nutrients in overlying water affect the environmental behavior of heavy metals in coastal sediments
	Liu, Xiaozhu 1,2; Liu, Qunqun 1; Sheng, Yanqing1
发表期刊	ENVIRONMENTAL RESEARCH
ISSN	0013-9351
	2023-12-01
卷号	238 页码:9
关键词	Coastal waters Sediments Nutrients Heavy metals
DOI	10.1016/j.envres.2023.117135
通讯作者	Sheng, Yanqing(yqsheng@yic.ac.cn)
英文摘要	Excessive nutrients in aquatic ecosystems are the main driving factors for eutrophication and water quality deterioration. However, the influence of nutrients in overlying water on sediment heavy metals is not well understood. In this study, the effects of nitrate nitrogen (NO3-N) addition and phosphate addition in the overlying water on the environmental behaviors of chromium (Cr), copper (Cu), and cadmium (Cd) in coastal river sediments were investigated. Fresh estuary sediments and synthetic saltwater were used in microcosm studies conducted for 13 d. To determine the biological effect, unsterilized and sterilized treatments were considered. The results showed that the diffusion of Cr and Cu was inhibited in the unsterilized treatments with increased NO3-N. However, under the NO3-N sterilized treatments, Cr and Cu concentrations in the overlying water increased. This was mostly related to changes in the microbial regulation of dissolved organic carbon and pH in the unsterilized treatments. Further, in the unsterilized treatments, NO3-N addition considerably increased the concentrations of the acid-soluble (Cr, Cu, and Cd increased by 5%-8%, 29%-41%, and 31%-42%, respectively) and oxidizable (Cr, Cu, and Cd increased by 10%, 5%, and 14%, respectively) fractions. Additionally, compared with that in the unsterilized treatments, Cu and Cd concentrations in P-3 treatments decreased by 7% and 63%, respectively. By producing stable metal ions, microorganisms reduced the amount of unstable heavy metals in the sediment and heavy metal concentration in the overlying water, by considerably enhancing the binding ability of phosphate and heavy metal ions. This study provides a theoretical basis for investigating the coupling mechanisms between heavy metals and nutrients.
资助机构	Key Project of Shandong Provincial Natural Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences
收录类别	SCI
语种	英语
关键词[WOS]	DISSOLVED-OXYGEN ; ORGANIC-MATTER ; NITROGEN ; PHOSPHORUS ; RELEASE ; CARBON ; FRACTIONS ; REDUCTION ; DIVERSITY ; ABUNDANCE
研究领域[WOS]	Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
WOS记录号	WOS:001081572600001
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/32837
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
通讯作者	Sheng, Yanqing
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaozhu,Liu, Qunqun,Sheng, Yanqing. Nutrients in overlying water affect the environmental behavior of heavy metals in coastal sediments[J]. ENVIRONMENTAL RESEARCH,2023,238:9.
APA	Liu, Xiaozhu,Liu, Qunqun,&Sheng, Yanqing.(2023).Nutrients in overlying water affect the environmental behavior of heavy metals in coastal sediments.ENVIRONMENTAL RESEARCH,238,9.
MLA	Liu, Xiaozhu,et al."Nutrients in overlying water affect the environmental behavior of heavy metals in coastal sediments".ENVIRONMENTAL RESEARCH 238(2023):9.