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

作　　者：王一 王松[1,2] 施柳 巩宗强[2] 贾春云 李晓军[2] 侯伟[1] WANG Yi;WANG Song;SHI Liu;GONG Zong-qiang;JIA Chun-yun;LI Xiao-jun;HOU Wei(School of Environment,Liaoning University,Shenyang 110036,China;Shenyang Institute of Ecological Sciences,Chinese Academy of Sciences,Shenyang 110016,China;Shenyang University,Shenyang 110003,China)

机构地区：[1]辽宁大学环境学院,辽宁沈阳110036 [2]中国科学院沈阳应生态研究所,辽宁沈阳110016 [3]沈阳大学,辽宁沈阳110003

出　　处：《土壤通报》2022年第5期1203-1211,共9页Chinese Journal of Soil Science

基　　金：国家重点研发计划课题(2019YF D1100504)资助。

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p H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。[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 after21 days treatment.The 5%Fe-modified biochar has the best stabilization effect on As,the stabilization efficiency was57.17%,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.

关 键 词：镉砷复合污染 有效态 硼泥 改性生物炭 高岭土 稳定化 

分 类 号：X53[环境科学与工程—环境工程]