摘要
沉积物通常是黏土、泥沙、有机质及各种矿物的混合物经过长时间物理、化学及生物等作用及水体传输而沉积于水体底部所形成。人类农业生产、工业、生活等会使沉积物的成分具有偏向性。重金属作为一类具有潜在危害的元素,进入水体后不会自然降解,在沉积物中积累而成为持久性污染物[1],当水质环境发生变化时(主要原因:水温、电导率、溶解氧、pH值、ORP、水流等因素),重金属会从沉积物中析出进入水体,通过生物富集作用会进入人体造成影响。
Sediments are usually formed by clay, sediment,organic matter,and various mineral mixtures deposited on the bottom of water bodies after a long period of physical, chemical, and biological effects and water transport.Human agricultural production, industry, life,can make the composition of sediments biased.As a kind of potentially harmful elements,heavy metals do not degrade naturally after entering the water body, and accumulate in the sediment to become persistent pollutants[1].When the water quality environment changes(mainly: water temperature, conductivity, dissolution ,Oxygen, pH, ORP, water flow),heavy metals will precipitate from the sediment and enter the water body, and will enter the human body through biological enrichment to affect it.
作者
白海峰
张洋阳
陈渊明
杨存满
李一凡
Bai Haifeng;Zhang Yangyang;Chen Yuanming;Yang Cunman;Li Yifan(Nanda Yancheng Environmental Detection Technology Co.,Ltd.,Yancheng Jiangsu 224002,China;Yancheng Institute of Environmental Technology and Engineering,Nanjing University,Yancheng Jiangsu 224002,China)
出处
《环境与发展》
2020年第3期31-32,34,共3页
Environment & Development
关键词
重金属
环境保护治理
表层沉积物
Heavy metals
Environmental protection
Surface sediments
