College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China.
College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China.
Mar Pollut Bull. 2018 Dec;137:601-609. doi: 10.1016/j.marpolbul.2018.10.044. Epub 2018 Nov 12.
The concentrations of seven heavy metals in the surface water and sediments from the Sheyang Estuary were investigated to determine their spatial distribution, source apportionment and the potential ecological risks. The relative concentrations of heavy metals in the sediments were ranked as follows: Zn > Cr > Cu > Pb > As > Cd > Hg. The majority of the average concentrations of heavy metals in the sediment were higher than their background values, except for Cr and Hg, whereas the surface water heavy metals concentrations were lower. All of the elements apart from Cd indicated that there was no contamination and a low degree of pollution overall. Moreover, the heavy metal levels generally indicated low ecological risks, except for Cd. The results showed that Cu, Pb, Cr and Cd are influenced significantly by anthropogenic activities. Therefore, it is necessary to control heavy metal contamination caused by anthropogenic activities in the study area.
本研究调查了射阳河口表层水和沉积物中七种重金属的浓度，以确定其空间分布、来源解析和潜在生态风险。沉积物中重金属的相对浓度依次为：Zn＞Cr＞Cu＞Pb＞As＞Cd＞Hg。除 Cr 和 Hg 外，大部分重金属在沉积物中的平均浓度高于背景值，而表层水中重金属浓度较低。除 Cd 外，所有元素均表明无污染，整体污染程度较低。此外，除 Cd 外，大部分重金属元素的水平均指示生态风险较低。结果表明，Cu、Pb、Cr 和 Cd 受到人为活动的显著影响。因此，有必要控制研究区域内人为活动引起的重金属污染。
