巯基膨润土影响土壤镉形态及水稻酶活性研究
摘要
使用自主研发的巯基化膨润土作为钝化剂治理镉污染水稻土。在镉污染水稻土中添加不同量巯基化膨润土,种植水稻,实验结果表明,添加了巯基化膨润土,土壤有效镉含量下降,添加量越大,下降越明显,有效态镉下降量与巯基化膨润土添加量具有显著相关性;分蘖期水稻叶片中过氧化氢酶(CAT)、超氧化物歧化酶(SOD)、过氧化物酶(POD)活性最大分别下降了70.83%、29.42%和43.82%,酶活性下降量与巯基化膨润土添加量具有显著相关性。该研究为巯基化膨润土修复镉污染土壤提供了基础数据。
引文
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[3]曾燕君,周志军,赵秋香.蒙脱石-OR-SH复合体材料对土壤镉的钝化及机制[J].环境科学,2015(6):2314-2319.
[4]Islam E,Liu D,Li T,et al.Effect of Pb toxicity on leaf growth physiology and ultrastructure in the two ecotypes of Elsholtzia argyi[J].Journal of Hazardous Materials,2007,147(3):806-816.
[5]Jiang W,Li W,Zhang C,et al.Physiological responses and detoxific mechanisms to Pb,Zn,Cu and Cd in young seedlings o Paulownia fortunei[J].Journal of Environmental Sciences,2010,22(12):1916-1922.
[6]Hu R,Sun K,Su X,et al.Physiological responses and tolerance mechanisms to Pb in two xerophils:Salsola passerina Bunge and Chenopodium album L.[J].Journal of Hazardous Materials,2012205-206(131-138):131-138.