生物炭和动植物联合修复Cd^(2+)污染红黏土  

Study on joint remediation of Cd^(2+)contaminated red clay by the use of biochar,animals and plants

作　　者：刘亚男 强毅[1] 牛玉彪 覃荣高[1] Liu Yanan;Qiang Yi;Niu Yubiao;Qin Ronggao(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming Yunnan 650032,China;Taiyuan University of Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650032 [2]太原理工大学,山西太原030024

出　　处：《化工矿物与加工》2022年第10期1-4,8,共5页Industrial Minerals & Processing

基　　金：国家自然科学基金(41867031)。

摘　　要：重金属污染红黏土修复近年来备受关注,生物炭和植物都是常用的修复重金属污染土壤的材料,相关研究成果较多,但是采用动物修复的研究较少。为了提高Cd^(2+)污染土壤的修复率,考虑加入生物炭、植物和动物进行联合修复,选取鸡粪生物炭(B)、蚯蚓(A)、君子兰(P)等3种材料,研究了这些材料对红黏土中Cd^(2+)的吸附和解吸特征及其对Cd^(2+)污染红黏土的修复效果,结果表明:生物炭和动植物联合对于Cd^(2+)污染红黏土的修复效果最显著(p<0.05),同时也促进了植物生长,改善了红黏土的微碱性环境;且修复材料投入的时间越长,生物炭和动植物对Cd^(2+)污染红黏土的修复效果越好。该成果可为重金属污染土壤修复研究提供参考。Much attention have been paid to remediation of red clay contaminated by heavy metals in recent years.Biochar and plants are common raw materials used for remediation of soil contaminated by heavy metals,on which the research is also extensive,but little research work was done on the remediation based on animals.In order to improve the rehabilitation rate of the Cd^(2+) contaminated soil,biochar,plants and animals were added for joint remediation where three raw materials were selected and prepared:chicken manure as a biochar(B),earthworm as an animal(A)and kaffir lily as a plant(P).Both the adsorption and desorption performance of these materials on Cd^(2+) element contained the red clay and the remediation effect were studied.The results show that remarkable remediation performance(p<0.05)of the Cd^(2+) contaminated red clay can be seen by combination of biochar,animals and plants,which also facilitated the growth of the plant,modified the slightly alkaline conditions for the red clay.The longer the time since such materials were fed to the joint remediation process of Cd^(2+) contaminated red clay,the better the remediation effect of biochar,animals and plants on the remediation can be achieved.The results of this study provide a reference for the joint remediation by use of biochar,animals and plants on red clay contaminated by heavy metals.

关 键 词：污染土壤修复 红黏土 生物炭 重金属 Cd^(2+) 联合修复 

分 类 号：X53[环境科学与工程—环境工程]