Distribution and assessment of heavy metals in the sea area of the proposed marineranching in Wailingding island in Zhuhai
According to the investigation data of heavy metals in seawater and surface sediments of the proposed marine ranching of Wailingding island,Zhuhai in spring and autumn of 2020,single-factor e-valuation method,comprehensive pollution index method and potential ecological risk index method were used to evaluate the quality level of heavy metals.The results showed that the Cu content of very few stations exceeded the class Ⅱ seawater quality standard,the comprehensive evaluation index of heavy metals in surface seawater of each station was less than 1,the comprehensive evaluation degree of heavy metals in seawater at S16 station was slightly polluted,and the rest stations were clean.There was obvious homology between Hg and As in surface seawater,and obvious heterogeneity among Pb,Hg and As.The content of heavy metals in surface sediments all met the quality standards of class I marine sediments,and heavy metals in sediments had only slight potential ecological risks to marine e-cosystems.There were slight potential ecological risks of heavy metals in surface sediments,and the construction of artificial reefs could form an upwelling and proliferating artificial reef system,which was conducive to eliminating the potential ecological impacts brought by heavy metals in surface sedi-ments.
NETL
NSTL
万方数据
