王　一, 王　松, 施　柳, 巩宗强, 贾春云, 李晓军, 侯　伟. 不同稳定化材料对镉砷复合污染土壤稳定化修复效果研究[J]. 土壤通报, 2022, 53(5): 1203 − 1211. DOI: 10.19336/j.cnki.trtb.2021102104
引用本文: 王　一, 王　松, 施　柳, 巩宗强, 贾春云, 李晓军, 侯　伟. 不同稳定化材料对镉砷复合污染土壤稳定化修复效果研究[J]. 土壤通报, 2022, 53(5): 1203 − 1211. DOI: 10.19336/j.cnki.trtb.2021102104
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WANG Yi, WANG Song, SHI Liu, GONG Zong-qiang, JIA Chun-yun, LI Xiao-jun, HOU Wei. Effect of Different Stabilization Materials on Stabilization and Modification of Cadmium-Arsenic Combined Contaminated Soil[J]. Chinese Journal of Soil Science, 2022, 53(5): 1203 − 1211. DOI: 10.19336/j.cnki.trtb.2021102104
Citation: WANG Yi, WANG Song, SHI Liu, GONG Zong-qiang, JIA Chun-yun, LI Xiao-jun, HOU Wei. Effect of Different Stabilization Materials on Stabilization and Modification of Cadmium-Arsenic Combined Contaminated Soil[J]. Chinese Journal of Soil Science, 2022, 53(5): 1203 − 1211. DOI: 10.19336/j.cnki.trtb.2021102104
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不同稳定化材料对镉砷复合污染土壤稳定化修复效果研究

Effect of Different Stabilization Materials on Stabilization and Modification of Cadmium-Arsenic Combined Contaminated Soil

    摘要
  • 摘要:
      目的  探究4种稳定化材料（碱性硼泥、酸性硼泥、高岭土和铁改性生物炭）对镉砷复合污染土壤高效同步稳定化修复的效果。
      方法  选用碱性硼泥、酸性硼泥、高岭土和铁改性生物炭4种稳定化材料，分别以0.5%、1%、2%、5%的比例添加于镉砷复合污染土壤中进行恒温恒湿培养，研究不同稳定化材料添加对土壤pH值及镉、砷有效态含量的影响。
      结果  除碱性硼泥外，其他3种材料均降低了土壤pH值，其中5%铁改性生物炭对土壤pH降低最为显著，处理21 d后土壤pH值下降了3.12个单位。5%铁改性生物炭对砷稳定效果最佳，稳定效率为57.17%，其次是5%高岭土和5%酸性硼泥，稳定效率分别为40.40%和33.37%；5%铁改性生物炭对镉稳定效果也为最佳，稳定效率为35.03%，其次是5%的碱性硼泥，稳定效率为28.20%。
      结论  综合考虑土壤镉－砷的同步稳定化修复效果，铁改性生物炭的修复效果明显优于其它3种稳定材料。

     

    Abstract:
      Objective  The effects of four stabilization materials (alkaline boron sludge, acidic boron sludge, kaolin and iron modified biochar) on the simultaneous stabilization and remediation of cadmium-arsenic (Cd-As) combined contaminated soil were investigated.
      Method  Alkaline boron sludge, acidic boron sludge, kaolin and Fe-modified biochar were added to the soil contaminated by Cd and As at the ratio of 0.5%, 1%, 2% and 5%, respectively, for constant temperature and humidity culture. The effects of different stabilization materials on soil pH value and available contents of Cd and As were studied.
      Result  Except alkaline boron mud, the other three materials all reduced the soil pH value. The 5% iron modified biochar significantly decreased the soil pH value, by 3.12 units after 21 days treatment. The 5% Fe-modified biochar has the best stabilization effect on As, the stabilization efficiency was 57.17%, followed by 5% kaolin and 5% acidic boron sludge, the stabilization efficiencies were 40.40% and 33.37%. The 5% Fe-modified biochar also had the best stabilization effect on Cd, with the stabilization efficiency of 35.03%, followed by the 5% alkaline boron sludge with 28.20%.
      Conclusion  Considering the effects of simultaneous stabilization of Cd and As in soil, the effects of Fe-modified biochar were better than the other three stabilized materials.

     

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