【摘要】 通过连续2年对深圳红树林自然保护区定点采样及水质分析,研究水样中铬、镉、铅、铜、锰、锌和镍7种重金属元素的质量浓度随时间变化,及其与气象因素的关系.研究表明,5个样地重金属元素铬、铜、镉和铅的质量浓度随降水量的增加和气温上升而逐渐下降;铅和镉元素的质量浓度均超出《海水水质标准》中第Ⅳ类水质标准,铜、锌和镍元素质量浓度符合国家Ⅰ类海水水质标准,未测出锌和镍元素;新洲河口的重金属污染程度较重,两个鱼塘的重金属污染程度较轻.更多还原

【Abstract】 The content and influence of the seven heavy metals of Cr,Cd,Pb,Cu,Mn,Zn and Ni were studied by monitoring the water from 5 sample sites in mangrove nature reserves of the Shenzhen bay for two years.The results show that the contents of Pb and Cd in all sampling sites were respectively 0.05 mg/kg and 0.01 mg/kg,exceeding the Class Ⅳ standards of the "Sea water quality standard GB3097-1997" while Cu,Zn and Ni were up to the Class Ⅰ sea water quality standards.During the study period,the content of heavy metal elements Cr,Cu,Cd and Pb gradually decreased with the increase of precipitation,and the rise of temperature also caused a decline.The heavy metal pollution in the Xinzhou estuary was more serious than that in other sample sites.At the same time,such pollution in two neighboring fishponds was only slight.In addition,no Zn and Ni was detected in any of the sample sites.更多还原