百年级的演变,来源的分配和重金属的生态风险在达雅湾,南中国海
Xiangtian Man1, Jian Sun2, Yu Xiang3
1School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu, 611756, China; South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China.
Environmental pollution (Barking, Essex : 1987)
|July 5, 2025
概括
自20世纪80年代以来,Daya Bay沉积物中的重金属污染因人类活动而显著增加. ,铜,和对水生生物构成最高的生态风险.
科学领域:
- 环境科学 环境科学
- 海洋化学 海洋化学
- 生态毒理学 生态毒理学
背景情况:
- 河口和沿海环境面临着由人类活动造成的重金属 (HM) 污染的增加.
- 沉积物核心是了解历史污染趋势和影响的关键档案.
研究的目的:
- 研究Daya Bay沉积物中的八种重金属 (Fe,Cu,Zn,Pb,Hg,Ni,Cr,Mn) 的时空变化,污染源和生态风险.
- 确定HM污染的时间顺序和历史变化.
主要方法:
- 沉积物核心分析以确定时间序列和沉积率.
- 非度量多维缩放 (NMDS) 用于识别政权转移和污染源.
- 毒理风险评估,以评估对水生生物的生态影响.
主要成果:
- 戴亚湾的沉积率在每年0.59至0.74厘米之间,时间HM度模式类似.
- 沉积系统在20世纪80年代发生了显著的政权转变,与HM污染和生态风险的增加有关.
- (Hg),铜 (Cu), (Cr) 和 (Pb) 被确定为优先污染物,其中Hg构成最高风险.
结论:
- 人类活动,包括交通,工业和水产养殖,加剧了大雅湾的HM污染.
- 对水生群体的HM混合物的不良影响的概率在不同地区 (23.6%,8.7%,30.2%) 之间存在差异.
- 研究结果支持针对沿海沉积环境中HM污染的有针对性的管理和整治策略.
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