云南某地突发污染事件土壤和作物重金属污染评价

An Emergent Pollution Incident in Yunnan Province

文章对云南省某地突发污染事件后污染区土壤及植物中重金属含量进行了调查并对其污染影响进行了评价。结果表明:突发性污染事件对区域土壤的影响主要为Cu和Cd,区域土壤受到Cu和Cd的轻度污染,污染事件导致土壤Pb和Zn含量有所增加,Pb含量并未超过国家标准,但区域Zn背景值较高,远远超过二级标准,区域土壤Zn达到重污染。污染区域植物样本重金属含量有所增加,污水对区域植物有一定影响。

Contents of heavy metals in soil and crops were analyzed and their pollution were evaluated. Results indicated that paroxysmal pollution incident resulted in pollution of Cu and Cd, with soil slightly polluted by Cu and Cd. Paroxysmal pollution incident resulted in increase of Pb and Zn content in Soil, but content of Pb did not exceed national standard of soil environment while high background content of Zn exceed Class II standard for soil environment. The soil has been seriously contaminated with Zn. Heavy metal content of plant in polluted region increased compared with non-polluted region. Plant was affected to certain extent by paroxysmal pollution incident.