无机-有机复配材料对Cd污染土壤的修复效应

发布时间：2018-06-06 20:09

本文选题：镉 + 钝化修复　；参考：《环境化学》2017年11期

【摘要】：通过大田试验,研究了无机材料(海泡石、蒙脱土和骨粉)-有机物料(菌渣、鸡粪、牛粪和蚯蚓粪)复配材料对Cd污染土壤的钝化修复效应及其对土壤酶活性的影响.结果表明,有机-无机材料复配处理显著提高了土壤p H值,最大增加0.96个p H单位.不同处理下土壤中TCLP(Toxicity characteristic leaching procedure)提取态Cd含量均有所降低,海泡石+有机物料、蒙脱土+有机物料和骨粉+有机物料处理下分别较对照减少了12.5%—24.9%、10.4%—19.4%和12.0%—21.7%.与对照相比,不同复配处理下,玉米籽粒Cd含量降低22.8%—79.0%(骨粉+蚯蚓处理除外),低于国家食品卫生标准(0.1 mg·kg~(-1)).不同复配材料对土壤过氧化氢酶和脲酶活性促进效果整体上表现为骨粉+有机物料蒙脱土+有机物料海泡石+有机物料,较对照最大增幅分别达到74.4%、42.7%和10.5%.
[Abstract]:The passivation and remediation effects of inorganic materials (sepiolite, montmorillonite, bone powder and organics (bacteria residue, chicken dung, cow dung and earthworm manure) on CD contaminated soil and their effects on soil enzyme activity were studied. The results showed that the soil pH value was significantly increased by the combination of organic-inorganic materials, with a maximum increase of 0.96 pH units. Under different treatments, the contents of TCLP, Toxicity characteristic leaching procedure) extractable CD in soil decreased, and the organic materials of sepiolite, montmorillonite and aggregate decreased by 12.5% -24.910.4% -19.4% and 12.0- 21.7%, respectively, compared with the control. Compared with the control, the CD content of corn grain decreased 22.8-79.0 (except earthworm treatment of bone powder) and was lower than the national food hygiene standard (0.1 mg 路kg ~ (-1) 路kg ~ (-1). The effects of different compound materials on soil catalase and urease activities were as a whole as bone powder organic materials, montmorillonite organic materials, sepiolite organic materials, the maximum increase of 74.4% and 10.5%, respectively.
【作者单位】：东北农业大学资源与环境学院农业部环境保护科研监测所农业部产地环境污染防控重点实验室农业部环境保护科研监测所天津市农业环境与农产品安全重点实验室
【基金】：公益性行业(农业)科研专项(201203045) 天津市自然科学基金重点项目(17JCZDJC34200) 公益性行业基本科研业务费资助~~
【分类号】：X53

【参考文献】