中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 烟台海岸带研究所
  3. 中国科学院烟台海岸带研究所
  4. 中科院海岸带环境过程与生态修复重点实验室
Nutrients in overlying water affect the environmental behavior of heavy metals in coastal sediments

文献类型：期刊论文

作者Liu, Xiaozhu1,2; Liu, Qunqun2; Sheng, Yanqing2
刊名ENVIRONMENTAL RESEARCH
出版日期2023-12-01
卷号238页码:9
ISSN号0013-9351
关键词Coastal waters Sediments Nutrients Heavy metals
DOI10.1016/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.
WOS关键词DISSOLVED-OXYGEN ; ORGANIC-MATTER ; NITROGEN ; PHOSPHORUS ; RELEASE ; CARBON ; FRACTIONS ; REDUCTION ; DIVERSITY ; ABUNDANCE
WOS研究方向Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
语种英语
WOS记录号WOS:001081572600001
资助机构Key Project of Shandong Provincial Natural Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.yic.ac.cn/handle/133337/32836]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_山东省海岸带环境工程技术研究中心
通讯作者Sheng, Yanqing
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, 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.

入库方式： OAI收割

来源：烟台海岸带研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。