摘要
采用火焰原子吸收光谱法和Tessier连续提取法研究分析了株洲市某一污染区稻田表层土壤（0-20 cm）重金属Cd,Pb,Cr和Cu的元素总量和元素形态分布。试验结果表明,该污染区稻田土壤p H=6.06,土壤已经酸化,其主要污染物为重金属Cd,超过GB/T 15618—1995二级标准10倍;其中,Cd的形态主要以可交换态和碳酸盐结合态为主,分别占总量的43.4%和30.5%;Pb主要以铁锰氧化态为主,占总量的46.7%;Cr和Cu主要以残渣态形式存在,分别占总量的79.6%和48.2%。分析结果表明,该地区Cd污染严重,需要进行污染治理。
The total amount and speciation of Cd, Pb, Cr and Cu heavy metals in paddy surface soil （0-20 cm） from contaminated area in Zhuzhou was investigated by using flame atomic absorption spectrometry （FAAS） and Tessier A sequential extraction method. The results showed that： paddy soil of the pollution area had been acidified（pH=6.06）, the heavy metal Cd was main pollution, 10 times more than the secondary standard of GB/T 15618-- 1995; Meanwhile, The morphology of Cd was mainly in exchangeable and bound to carbonates fraction, accounting for 43.4% and 30.5% respectively; Pb was mainly in bound to Fe Mn oxides fraction, accounting for 46.7%; Cr and Cu was mainly in residual fraction, accounting for 79.6% and 48.2% respectively. The analysis shows that Cd pollution in the area is seriously, and it needs for pollution control.
出处
《湖南工业大学学报》
2014年第5期105-108,共4页
Journal of Hunan University of Technology
基金
国家自然科学基金资助项目(61171061)
湖南省自然科学基金资助项目(14JJ2149)
湖南省科技厅科技计划重点基金资助项目(2014SK2019)
湖南工业大学自然科学研究计划基金资助项目(2014HZX02)
国家自然科学青年基金资助项目(31401456)
