摘要
采用煅烧法对坡缕石进行热活化处理制备5种钝化材料,并以不同比例分别加入实际污染土壤中,确定热活化坡缕石钝化修复Cr-Ni污染土壤的最佳投加量。结果表明,热活化温度为400℃,热活化时间为1 h,坡缕石添加量为256 g/kg时,土壤中Cr和Ni的二乙烯三胺五乙酸(DTPA)萃取态含量最低,比对照组降低80.45%和76.76%;土壤中Cr和Ni残渣态含量最高,分别为86.56%和82.42%;同时土壤中重金属的钝化效率最高,迁移率最低。
Use palygorskite which was thermally activated by calcination to prepare five stabilized materials,the optimal dosage of stabilized palygorskite for Cr-Ni contaminated soil remediation was determined by adding different contents of stabilized materials to the actual contaminated soil.The results showed that when thermal activation temperature was 400℃,the thermal activation time was 1 h,and the additive amount of palygorskite was 256 g/kg,the DTPA contents of Cr and Ni in the soil were the lowest,which decreased by 80.45%and 76.76%compared with the control.The residue contents of Cr and Ni in soil were 86.56%and 82.42%,respectively.Meanwhile,the soil heavy metals had the highest stabilization remediation efficiency and the lowest mobility.
作者
任珺
王丽
王艺蓉
仝云龙
杨万辉
余方可
陶玲
Ren Jun;Wang Li;Wang Yirong;Tong Yunlong;Yang Wanhui;Yu Fangke;Tao Ling(Key laboratory of Yellow River Water Environment in Gansu Province,Lanzhou Jiaotong University,Lanzhou,Gansu 730070;School of Environmental and Municipal Engineering,Institute of Environmental Ecology,Lanzhou Jiaotong University,Lanzhou,Gansu 730070;Gansu Hanxing Environmental Protection Co.,Ltd.,Lanzhou,Gansu 730070;School of Environmental Science and Engineering,Shaanxi University of Science&Technology,Xi’an,Shaanxi 710021)
出处
《非金属矿》
CSCD
北大核心
2021年第5期83-86,共4页
Non-Metallic Mines
基金
国家自然科学基金(51668034,31560234)
甘肃省科技支撑项目(20JR2RA002)
甘肃省教育厅产业支撑计划项目(2021CYZC-31)。
关键词
热活化
坡缕石
污染土壤
钝化
thermal activation
palygorskite
contaminated soil
stabilization
