基于生物炭的稳定化技术工艺优化研究  

Study on Process Optimization of Stabilization Technology Based on Biochar

作　　者：李灿 欧阳坤[1] 彭达 周睿 游萍[1] 叶世民 LI Can;OUYANG Kun;PENG Da;ZHOU Rui;YOU Ping;YE Shi-min(Hunan Research Institute for Nonferrous Metals Co.,Ltd.,Changsha 410100,China)

机构地区：[1]湖南有色金属研究院有限责任公司,湖南长沙410100

出　　处：《湖南有色金属》2022年第4期49-52,共4页Hunan Nonferrous Metals

基　　金：国家重点研发计划(2018YFC1802700);长沙市科技计划(kh2201440)。

摘　　要：针对复合重金属Cd、Pb、As污染土壤,研究了不同工艺条件对研发的生物炭材料稳定化土壤中重金属Cd、Pb、As的影响,同时通过TCLP浸出方法验证生物炭的稳定化效率,并通过冻融试验研究了生物炭稳定化土壤中Cd、Pb、As的长效性。结果表明,生物炭稳定化土壤中重金属Cd、As、Pb的最佳工艺为:生物炭添加量为土壤质量的5%,土水比为1∶1.25,施用方式为生物炭分段施用,稳定化时间为7 d。同时,经稳定化处理后的土壤中Cd、Pb、As经过模拟三年冻融试验其稳定率下降在20%以内。The different technological conditions on biochar stabilization of Cd, Pb, As contaminated soil was studied.Toxicity characteristic leaching procedure was adopt to evaluate the efficiency of stabilization, and freeze-thaw test method was employed to assess the long term effectiveness.The results showed that the optimal technological conditions for the stabilization of heavy metals Cd, As and Pb in soil by biochar was as follows: the dosage of stabilization agent was 5%(mass ratio)of contaminated soil, the ratio of soil to water was 1∶1.25,and the application method was piecewise addition of biochar, and the stabilization time was 7 days.Meanwhile, the reduction rates of stabilization rate of Cd, Pb and As in soils were less than 20% after simulated 3 years freeze-thaw test.

关 键 词：重金属 土壤修复 生物炭 稳定化 长效性 

分 类 号：X53[环境科学与工程—环境工程]