摘要
利用Tessier连续提取法对粤北上坝村稻田土壤中重金属化学形态分布特征进行研究,同时调查稻田间隙水中重金属的污染状况。结果表明,研究区域稻田土壤中Cu超标严重,主要以稳定态的形式存在,环境迁移量相对较少;土壤中Zn的生物有效性最低,Cd污染达到中等水平,其生物有效性最高;可交换态Mn,碳酸盐结合态Cd及铁锰氧化物结合态的Mn、Pb、Zn的占比较高,对农业生产环境具有一定的潜在威胁。稻田间隙水中Cd含量超标1.8倍。
In this paper,heavy metal pollution situation in the porewater was studied by Tessier method for exploring the species distribution of heavy metals in paddy soil from Shangba village in northern Guangdong. The results indicated that the concentration of Cu was much higher than the secondary standards of soil environmental quality and it presented mainly in stable species,as well as the environmental migration was relatively low. The bioavailability of Zn in paddy soil was the lowest. Cd reached to moderate pollution level and its bioavailability was the highest. The percentage of water soluble form of Mn,carbonate-bound form of Cd and Fe-Mn-oxidebound form of Mn,Pb,Zn were high,which were a potential threat to agricultural production environment. The concentration of Cd in porewater was 1. 8 times over the standard limit of irrigation water quality.
出处
《环境监测管理与技术》
CSCD
2017年第5期33-36,43,共5页
The Administration and Technique of Environmental Monitoring
基金
国家自然科学基金资助项目(41373079)
2015年广东省高等学校优秀青年教师培养计划基金资助项目(YQ2015203)
2016年度广东环境保护工程职业学院人才基金资助项目(K660116011812)
2013年广东环境保护工程职业学院院长科研基金资助项目(KY201302007)
关键词
重金属
化学形态
稻田土壤
间隙水
粤北上坝村
Heavy metal
Speciation distribution
Paddy soil
Porewater
Shangba village in northern Guangdong
