山东省乐陵—河口地区重金属污染现状与分布迁移规律

POLLUTION SITUATION AND DISTRIBUTION MIGRATION OF HEAVY METALS IN SOIL OF LELING-ESTUARY AREA,SHANDONG PROVINCE

对山东省乐陵—河口地区重金属元素的分布迁移规律进行研究,结果表明,研究区土壤以清洁型为主;污染区土壤轻度污染所占比例最大,中度及重度污染占研究区的0.57%,污染因子主要为Cd、Hg、Pb,工业废水是土壤污染的主要来源。Cd、Hg在污染区小麦秸杆中明显富集,接近或超过其根系土中的含量,在籽实中含量最低,小麦籽实中Se、Zn明显富集。土壤根系土中Cd、Hg等以稳定态分布为主,活动态的含量很低,活化迁移量少,这与区内碱性环境密切相关。

A study of the distribution and migration regularity of heavy metals in Leling-estuary area of Shandong Province shows that the soil of the study area belongs mainly to the clean area,that the mild pollution possesses the largest proportion in the polluted area,and that medium and heavy pollution possesses 0.57% of the whole study area.Pollution factors are mainly Cd,Hg and Pb.Industrial waste water is the main source of soil pollution.The wheat straw in the polluted area is obviously enriched with Cd and Hg,whose values are close to or exceed the Cd and Hg content of the root system soil and are lowest in seeds.The wheat seeds are evidently enriched with Se aned Zn.Cd and Hg are distributed mainly in stable state in root system soil,and the content of active state Cd and Hg is very low.The insignificant activation migration quantity is closely related to the alkaline environment of the study area.