福建省三明市稻谷重金属污染特征及修复措施

Pollution characteristics of Heavy Metals in Rice in Sanming City and Remediation measures

对福建省三明市286个行政村的地产晚籼稻谷样品的重金属进行检测,利用四分位法和箱线图分析并直观展示其重金属污染水平和分布情况,并根据重金属污染水平较高区域的污染特征提出了修复建议。检测结果表明,三明市地产稻谷总体重金属污染处于较低水平,但呈现较为明显的地域特点,污染分布很不均匀,部分区域污染水平较高。建议三明各县(市)因地制宜,种植合适的富集植物,修复改善重金属污染水平较高的耕地,如有的县可以重点考虑通过种植一年蓬、凤尾蕨来修复改善受镉污染耕地,有的县可以重点考虑通过种植蜈蚣草、向日葵来修复改善受砷污染耕地。

In this research,detections of the heavy metals are made in local late long-grain nonglutinous rice samples from 286 administrative villages in Sanming City,Fujian Province,quartile method and boxplot are used to analyze and display the pollution level and distribution of heavy metals,and remediation suggestions are put forward according to the pollution characteristics of areas with higher heavy metal pollution levels.The results show that the overall heavy metal pollution of rice in Sanming is at a low level,but with obvious regional differences.The pollution distribution is rather uneven,and the pollution level is high in some areas.This paper suggests that all regions in Sanming plant appropriate enrichment plants according to local conditions to remediate and improve the cultivated land with high level of heavy metal pollution.For example,Some counties can mainly plant annual fleabane and phoenix-tail fern to remediate and improve cultivated land polluted by cadmium,and Some counties can remediate and improve the arsenic-polluted cultivated land by planting centipede grass and sunflower.