摘要
采用连续化学浸提萃取法 ,研究了广州市白云区大气颗粒物 (TSP)样品在模拟酸雨和湖水条件下重金属元素Cu、Pb和Zn的形态迁移和变化 .结果表明 :大气颗粒物中Cu、Pb和Zn的总含量在模拟酸雨浸泡后大幅降低 ,但Cu和Pb的可交换态的量略有增加 ,Zn主要以残渣态存在 ;大气颗粒物经湖水浸泡后 ,Cu和Pb的总含量基本不变 ,Cu由残渣态向铁锰氧化物结合态及有机物结合态转化 ,Pb由可交换态转化为其他形态 ,Zn大部分以溶解态转移到湖水中 .
Under conditions of simulated acid rain and lake water, the speciation transfer and variation of the heavy metals Cu, Pb and Zn in the atmospheric particulates (TSP) sampled in Baiyun District of Guangzhou were investigated by means of cont inuous chemistry extraction. The results indicate that the total contents of Cu, Pb and Zn greatly decrease after dipping in the simulated acid rain, while the amounts of extractable fraction of Cu and Pb increase little, Zn mainly appears as residual fraction. It is also shown that, after the treatment by lake water, the total contents of Cu and Pb generally have no change, Cu transfers from resi dual fraction to Fe-Mn oxide and organic fraction, Pb transfers from extractabl e fraction to other fractions, and Zn mainly transfers to lake water with an ext ractable fraction.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第1期75-78,共4页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省教育厅资助项目 (B2 12 4 80 3)
关键词
大气颗粒物
重金属
形态分析
迁移
atmospheric particulate
heavy metal
speciation an alysis
transfer
