杨　润, 罗　燕, 黄金富, 邵梦迪, 费藏乐, 谭富耀, 蔡　倩, 伍　钧, 徐　敏. 三种钝化剂对镉－砷复合污染水稻土修复效果研究[J]. 土壤通报, 2024, 55(1): 184 − 192. DOI: 10.19336/j.cnki.trtb.2023012001
引用本文: 杨　润, 罗　燕, 黄金富, 邵梦迪, 费藏乐, 谭富耀, 蔡　倩, 伍　钧, 徐　敏. 三种钝化剂对镉－砷复合污染水稻土修复效果研究[J]. 土壤通报, 2024, 55(1): 184 − 192. DOI: 10.19336/j.cnki.trtb.2023012001
shu
YANG Run, LUO Yan, HUANG Jin-fu, SHAO Meng-di, FEI Cang-le, TAN Fu-yao, CAI Qian, WU Jun, XU Min. Remediation Effects of Three Passivators on Cd-As Co-contaminated Paddy Soil[J]. Chinese Journal of Soil Science, 2024, 55(1): 184 − 192. DOI: 10.19336/j.cnki.trtb.2023012001
Citation: YANG Run, LUO Yan, HUANG Jin-fu, SHAO Meng-di, FEI Cang-le, TAN Fu-yao, CAI Qian, WU Jun, XU Min. Remediation Effects of Three Passivators on Cd-As Co-contaminated Paddy Soil[J]. Chinese Journal of Soil Science, 2024, 55(1): 184 − 192. DOI: 10.19336/j.cnki.trtb.2023012001
shu

三种钝化剂对镉－砷复合污染水稻土修复效果研究

Remediation Effects of Three Passivators on Cd-As Co-contaminated Paddy Soil

    摘要
  • 摘要:
      目的  本研究目的为寻求高效、经济的钝化剂用于修复镉－砷（Cd-As）复合污染农田土壤，为保障粮食安全及人类健康发挥重要作用。
      方法  本研究以Cd-As复合污染水稻土为研究对象，开展土培试验，以无添加空白为对照（CK），通过外源添加CaCO3（CA）、水稻秸秆（JG）、水稻秸秆生物炭（SW）对比三种钝化剂对Cd、As的钝化效果，同时关注不同钝化剂对土壤肥力指标及土壤酶活性的影响，以期筛选出能在有效钝化Cd-As的同时还可提高农田土壤生态功能的钝化剂。
      结果  结果表明，与CK相比，CA、JG和SW处理下Cd毒性浸出率分别降低了6.13%、8.97%和12.3%，As毒性浸出率分别降低了9.02%、4.24%和5.42%；同时，CA和SW处理下残渣态Cd分别增加了12.2%和12.1%，残渣态As分别增加了28.7%和15.1%。与CK相比，三种处理下土壤pH、有机质、全氮、全磷含量均显著增加，其中SW处理下土壤有机质、全氮、全磷最高，与CK相比分别提升了7.51%、9.14%和15.6%。此外，与CK相比，SW处理下土壤碱性磷酸酶活性、蛋白酶活性显著增加，分别增加了35.3%和12.2%。
      结论  综上，生物炭在修复Cd-As复合污染土壤方面具有明显优势，其添加即可降低Cd、As有效性，还可提升土壤肥力和生态功能，是重金属污染土壤特别是Cd-As复合污染土壤的良好修复材料。

     

    Abstract:
      Objective  The purpose of this study was to find effective and affordable effective passivation agents used in the remediation of cadmium (Cd) -arsenic (As) co-contaminated farmland soil, which would play an important role in protecting food security and human health.
      Method  A soil-based incubation experiment was carried out by utilizing paddy soil that had been contaminated with Cd-As. The effects of various passivators (i.e., CaCO3 (CA), rice straw (JG), and rice straw biochar (SW) ) on the immobilization of Cd and As, as well as on soil fertility index and soil enzyme activities, were analyzed in order to find the most suitable passivators in reducing Cd and As availabilities and in maintaining soil eco-function.
      Result  The results showed that the toxic leaching amounts of Cd decreased by 6.13%, 8.97% and 12.3% in comparison to control (CK), and the toxic leaching amounts of As decreased by 9.02%, 4.24% and 5.42% in CA, JG and SW treatments, respectively. The residual Cd and As levels increased by 12.2% and 12.1% in CA treatment, and by 28.7% and 15.1% in SW treatment. Compared with CK, soil pH, organic matter, total nitrogen, and total phosphorus content increased significantly in all three treatments. The SW treatment had the highest levels of soil organic matter, total nitrogen, and total phosphorus, which increased by 7.51%, 9.14% and 15.6%, respectively, compared with CK. Additionally, soil alkaline phosphatase and protease activities significantly enhanced by 35.3% and 12.2% in SW treatment compared to CK.
      Conclusion  As shown by the efficient reduction of Cd and As effectiveness and the improvement of soil fertility and ecological functions, adding biochar has clear benefits in the remediation of Cd-As co-contaminated soil, making it a good remediation material for heavy metal contaminated soil, particularly in Cd-As co-contaminated soil.

     

    • HTML全文
    • 参考文献(57)
    • 相关文章
    • 施引文献
  • 资源附件(0)

/

返回文章
返回