CAJ | 학술논문

[目的]研究赤泥对矿区重金属污染稻田土壤中Pb、Zn和Cd的修复效应,阐明其对重金属污染土壤的修复机理及肥效机制。[方法]通过土壤培养试验,研究了赤泥对土壤pH值和电导率（EC）的影响,探讨了其对土壤Pb、Zn和Cd重金属的修复效应。[结果]赤泥能显著降低土壤中交换态Pb、Zn和Cd含量,当赤泥用量为4%（W/W）时,培养30、60和90d后,交换态Pb含量分别比不施赤泥的对照处理下降了39.25%、41.38%和50.19%;交换态Zn含量分别比对照下降了49.26%、57.32%和47.16%;交换态Cd含量分别比对照处理下降了19.53%、24.06%和25.70%。施用赤泥对土壤5种形态Pb、Zn和Cd所占总Pb、Zn和Cd的比重有明显影响,不同赤泥处理均降低了土壤中交换态Pb、Zn和Cd占总Pb、Zn和Cd的比重,且该3种重金属各自所占比重均随赤泥施用量的增加而下降。[结论]该研究为赤泥在稻田土壤上的合理施用以及其减少稻田土壤重金属污染的研究提供参考依据。
[목적]연구적니대광구중금속오염도전토양중Pb、Zn화Cd적수복효응,천명기대중금속오염토양적수복궤리급비효궤제。[방법]통과토양배양시험,연구료적니대토양pH치화전도솔（EC）적영향,탐토료기대토양Pb、Zn화Cd중금속적수복효응。[결과]적니능현저강저토양중교환태Pb、Zn화Cd함량,당적니용량위4%（W/W）시,배양30、60화90d후,교환태Pb함량분별비불시적니적대조처리하강료39.25%、41.38%화50.19%;교환태Zn함량분별비대조하강료49.26%、57.32%화47.16%;교환태Cd함량분별비대조처리하강료19.53%、24.06%화25.70%。시용적니대토양5충형태Pb、Zn화Cd소점총Pb、Zn화Cd적비중유명현영향,불동적니처리균강저료토양중교환태Pb、Zn화Cd점총Pb、Zn화Cd적비중,차해3충중금속각자소점비중균수적니시용량적증가이하강。[결론]해연구위적니재도전토양상적합리시용이급기감소도전토양중금속오염적연구제공삼고의거。
[Objective] To study the remediation efficiency of red mud on Pb, Zn and Cd in the heavy metal contaminated paddy soil of mine area, to clarify its remediation mechanism and fertilizer efficiency on heavy metal contaminated soil. [Method] The soil incubation experiment was conducted to study the effect of red mud on the pH values and electrical conductivity （EC）, and the remediation efficiency of red mud on lead （Pb）, zinc （Zn） and cadmium （Cd） in heavy metal contaminated soil. [Result] Red mud addition reduced the content of exchangeable Pb, Zn and Cd in the soil significantly. Compared with the control, when incubated for 30, 60 and 90 d with the red mud dosage of 4% （W/W）, the exchangeable Pb content was decreased by 39.25%, 41.38% and 50.19%; exchangeable Zn content was decreased by 49.26%, 57.32% and 47.16%; and exchangeable Cd content was decreased by 19.53%, 24.06% and 25.70%, respectively. The application of red mud had significant impact on the share of Pb, Zn and Cd contents in five forms, and different amounts of red mud application all reduced the proportion of exchangeable Pb, Zn and Cd to the total Pb, Zn and Cd. In addition, the proportion of exchangeable Pb, Zn and Cd to total Pb, Zn and Cd decreased with the increasing amount of red mud addition. [Conclusion] The study provided references for reasonable application of red mud and reduction of heavy metal pollution in paddy soil.