School of Marine Sciences, Ningbo University, Ningbo 315832, China; Ningbo Institute of Oceanography, Ningbo 315832, China.
Supervision, Inspection and Testing Center of Agricultural Products Quality and Security, Ministry of Agriculture, Ningbo, Ningbo 315040, China.
Mar Pollut Bull. 2020 Aug;157:111370. doi: 10.1016/j.marpolbul.2020.111370. Epub 2020 Jun 17.
The spatiotemporal variation, seasonal variation, and potential ecological risk of eight heavy metals (HMs) in the Meishan Bay (MSB) a new artificial lagoon -from 2014 to 2019 were investigated. The levels of As, Cu, Pb, Cr, Ni, and Zn in winter were higher than in other seasons, Hg in winter and summer were higher than in other seasons, while Cd in summer and spring (wet season) were the highest. The seasonal distribution of HMs was mainly affected by particle size, anthropogenic sources, rainfall, and water characteristics. The concentrations of these HMs showed a general downward trend, while Hg showed an upward trend from2014 to 2019. Higher levels of HMs were found outside the North dyke and some sluice gates. The sources of Cd, Zn, and Pb could be attributed to ship discharges and traffic exhaust, while pesticides and fertilizers were the main sources of Hg. Among all these HMs, Cd and Hg caused moderate pollution in the MSB.
调查了 2014 年至 2019 年期间，梅山水道（MSB）这一新人工泻湖八种重金属（HMs）的时空变化、季节变化和潜在生态风险。冬季 As、Cu、Pb、Cr、Ni 和 Zn 的含量高于其他季节，冬季和夏季 Hg 的含量高于其他季节，而夏季和春季（湿季）Cd 的含量最高。HMs 的季节分布主要受粒径、人为源、降雨和水特性的影响。这些 HMs 的浓度呈总体下降趋势，而 Hg 的浓度则在 2014 年至 2019 年呈上升趋势。在北堤外和一些水闸处发现了更高浓度的 HMs。Cd、Zn 和 Pb 的来源可能与船舶排放和交通废气有关，而 Hg 的主要来源是农药和化肥。在所有这些 HMs 中，Cd 和 Hg 对 MSB 造成了中度污染。
