CAJ | 학술논문

[目的]研究添加钠基蒙脱石对重金属污染红壤中Cu、Zn、Pb和Cd的改良效应.[方法]以采自江西贵溪铜尾矿污染红壤为样品,通过室内恒温培养试验,设5个处理(添加钠基蒙脱石0、1%、2%、4%、8%),测定处理后各样品的土壤有效态重金属含量、水浸提液的Na+、电导率及pH值,分析它们之间相关性.[结果]添加4%和8%的钠基蒙脱石能显著降低重金属污染红壤中有效态Cu、Zn、Pb和Cd的含量,与对照相比,分别降低33.8%和40.2%、33.2%和37.2%、28.4%和32.7%、35.7%和34.5%;随钠基蒙脱石添加量的增加,土壤水浸提液的Na+和电导率以及土壤的pH值逐渐升高.[结论]钝化机理分析表明,重金属污染土壤添加钠基蒙脱石使土壤的pH值升高,增加土壤的吸附性能,使重金属离子与钠基蒙脱石中的Na+发生了置换反应.
[목적]연구첨가납기몽탈석대중금속오염홍양중Cu、Zn、Pb화Cd적개량효응.[방법]이채자강서귀계동미광오염홍양위양품,통과실내항온배양시험,설5개처리(첨가납기몽탈석0、1%、2%、4%、8%),측정처리후각양품적토양유효태중금속함량、수침제액적Na+、전도솔급pH치,분석타문지간상관성.[결과]첨가4%화8%적납기몽탈석능현저강저중금속오염홍양중유효태Cu、Zn、Pb화Cd적함량,여대조상비,분별강저33.8%화40.2%、33.2%화37.2%、28.4%화32.7%、35.7%화34.5%;수납기몽탈석첨가량적증가,토양수침제액적Na+화전도솔이급토양적pH치축점승고.[결론]둔화궤리분석표명,중금속오염토양첨가납기몽탈석사토양적pH치승고,증가토양적흡부성능,사중금속리자여납기몽탈석중적Na+발생료치환반응.
[Objective]The purpose was to study the modified effect of Na-montmorillonite on Cu, Zn, Pb and Cd in heavy metal polluted red soil. [Method]In the indoor experiment by constant temperature culture, with polluted red soil from the Guixi Copper Tailings in Jiangxi Province as samples, 5 treatments of adding 1%, 2%, 4% and 8% Na-montmorillonite and non-adding Na-montmorillonite were set up, the available heavy metal, Na+ in water extract, electric conductivity and pH in soil from each sample were measured and their correlations were analyzed. [Result]Adding 4% and 8% Na-montmorillonite could significantly decrease the contents of available Cu, Zn, Pb and Cd in heavy metal polluted red soil, being 33.8% and 40.2%, 33.2% and 37.2%, 28.4% and 32.7%, 35.7% and 34.5% lower than that in CK, resp ectively. Na+ in water extract, electric conductivity and pH in soils was gradually increased with the increase of Na-montmorillonite adding amount. [Conclusion]Analysis on the passivation mechanism showed that the addition of Na-montmorillonite in heavy metal polluted red soil could rise the pH value of soil and increase its adsorption properties, which made the heavy metal ions produce replacement reaction with Na+ in montmorillonite.