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铬污染土壤的药剂修复及其长期稳定性研究
doi: 10.13205/j.hjgc.201502036
STUDY OF REMEDIATION AND LONG-TERM EFFECT OF AGENTS ON CHROMIUM CONTAMINATED SOIL
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摘要: 利用不同投加比例的硫化钠及连二亚硫酸钠,分别对不同类型的铬污染土壤进行修复处理,通过土壤总铬及六价铬浸出浓度的测定,研究了供试药剂对铬污染土壤的短期(3 d)和长期(1.5 a)稳定化效果。结果表明:两种药剂对铬污染土壤的稳定化均具有很好的效果,可以在短期内快速降低总铬和六价铬的浸出浓度,其效果随着投加量的增加而提高。在长期稳定过程中,不同药剂不同投加量的的稳定化效果进一步提高,且保持稳定。Abstract: Short-term ( 3 d) and long-term ( 1. 5 a) stabilization effects of different types of Cr contaminated soil were investigated through nature curing，using two agents including sodium sulfide and sodium dithionite． The results indicated that two agents could effectively and rapidly decrease total leaching Cr and Cr( VI) content in the short term，the effect increased with an increase in the dosage． The stabilization effect of different agents was further improved after long-term curing．
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Key words:
- chromium /
- soil /
- remediation /
- long-term stability
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