摘要
烟台市是山东半岛蓝色经济区核心城市之一,通过对山东省烟台市生态地球化学资料的系统整理,研究土壤重金属污染现状与分布迁移规律,发现土壤主要污染因子是As、Cd、Hg、Cu、Pb、Zn等重金属元素污染,工矿三废排放是土壤重金属污染的主要原因;主要致污因子砷是环境中毒性最大的有害元素之一。土壤-苹果树体系中As迁移及形态转化规律为:植物根系吸收土壤中的砷,并在根部发生了AsⅤ→AsⅢ的还原作用,由植物的根部向上迁移过程中,AsⅢ的比例逐渐降低。砷在根系土-植物体系中的分布为:根系土>根>叶子>茎>苹果。
Yantai City is one of the blue economic areas of Shandong peninsula.Contamination situation,distribution and transportation of heavy metals were studied in this paper on the basis of eco-system geochemical data of Yantai.The results indicate that the main factors responsible for soil pollution are As,Cd,Hg,Cu,Pb,Zn,and the main sources of the heavy metals are composed of wastes and discharges of factory and mining activities.Chemical species of arsenic in the soil-plant system were analyzed.It is found that plant roots absorb soil As and are subjected to the reduction of AsⅤ→AsⅢ,that in the upward migration process,AsⅢ proportion gradually decreases.The distribution of As in the root soil-plant system is in order of root soil root leaf stem apple.
出处
《中国地质》
CAS
CSCD
北大核心
2011年第6期1620-1630,共11页
Geology in China
基金
山东省国土资源厅大调查项目“山东省东部地区农业生态地球化学调查”(2006135)资助
关键词
烟台市
重金属污染
砷元素形态
迁移规律
生态效应
Yantai
heavy metal pollution
As element form
migration rule
ecological effect
