引用本文:吴丽娟,任兰,陆喜红,胡恩宇,杨丽莉.南京市典型水域沉积物中重金属形态分布特征[J].环境监控与预警,2018,10(5):48-51
WU Li juan,REN Lan, LU Xi hong,HU En yu,YANG Li li.Research on the Chemical Speciation of Heavy Metals in Sediments of Typical Waters in Nanjing City[J].Environmental Monitoring and Forewarning,2018,10(5):48-51
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南京市典型水域沉积物中重金属形态分布特征
吴丽娟,任兰,陆喜红,胡恩宇,杨丽莉
江苏省南京环境监测中心,江苏 南京 210013
摘要:
采用顺序提取的方法对南京市典型河流和湖泊水域的沉积物进行重金属化学形态研究,分析了Cu、Zn、Pb、Cd、Ni、Cr 6种重金属元素在不同水体沉积物中各个形态赋存的含量分布特征。结果表明,6种元素生物有效性排序为:Cd>Pb>Zn>Cu>Ni>Cr,其中Cd和Pb以弱酸提取态和可还原态为主要存在形态,其不仅会对上覆水体产生二次污染,对水生动植物也具有较强的危害性。另外,通过结果间接反映出受人类生产生活影响大的水体,受污染的程度更高,各种金属元素赋存的形态也更易迁移转化,在环境治理方面更应受到重视。
关键词:  沉积物  重金属  化学形态  长江  秦淮河  玄武湖  固城湖
DOI:
分类号:X522
文献标识码:B
基金项目:南京市环境保护局基金资助项目(201606)
Research on the Chemical Speciation of Heavy Metals in Sediments of Typical Waters in Nanjing City
WU Li juan,REN Lan, LU Xi hong,HU En yu,YANG Li li
Jiangsu Nanjing Environmental Monitoring Center, Nanjing, Jiangsu 210013, China
Abstract:
Heavy metals sequential extraction was applied to examine the spatial occurrence characteristics of Cu,Zn,Pb,Cd,Ni,Cr in sediments of rivers or lakes in Nanjing. The results showed the bioavailability of 6 heavy metals ranked as follow: Cd>Pb>Zn>Cu>Ni>Cr. Cd and Pb exist mainly in reducible state and acid soluble state, and they not only produce secondary pollution on the overlaying water but also have higher risk to aquatic organisms. Moreover, the more human production and living activities affect the water environments,the higher degree of pollution appears, and the migration and transformation of specification of heavy metals become more easily, which should be paid more attention.
Key words:  Sediment  Heavy metals  Chemical speciation  Changjiang  Qinhuai River  Xuanwu Lake  Gucheng Lake