摘要
以500℃下制备的稻草秸秆生物炭为土壤修复剂,通过60 d的培养实验研究了Cd-Pb复合污染土壤的固化稳定化修复过程,并运用元素分析、FTIR等方法对生物炭的基本性质进行了表征。表征结果显示,稻草秸秆生物炭呈碱性,比表面积较大,拥有较好的芳香性,不易在环境中降解。实验结果表明,施加稻草秸秆生物炭后,污染土壤中的Cd有效态含量从47.63 mg/kg降至20.38 mg/kg,Pb有效态含量从89.52 mg/kg降至22.73 mg/kg,分别降低了57.1%和74.6%。同时,生物炭的施加还显著减少了土壤中Cd和Pb的酸溶态含量(分别减少了53.1%和74.1%),增加了残渣态含量(分别增加了615.3%和378.2%),实现了土壤中重金属的固化稳定化。
The remediation process of solidification and stabilization of Cd-Pb contaminated soil was studied through a 60-day incubation experiment using the rice straw biochar prepared at 500℃as a soil remediation agent.Then,the basic properties of biochar were analyzed by elemental analysis and FTIR.The characterization results show that the rice straw biochar is alkaline with large specific surface area and good aromaticity,and is difficult to be degraded in the environment.The experiment results show that with the addition of straw biochar,the available content of Cd and Pb in the contaminated soil is reduced from 47.63 mg/kg to 20.38 mg/kg and from 89.52 mg/kg to 22.73 mg/kg,with 57.1%and 74.6%of the reduction rate,respectively.At the same time,the addition of biochar can also significantly reduce the acid-soluble content of Cd and Pb in the soil by 53.1%and 74.1%respectively,and increase the residual content by 615.3%and 378.2%respectively,realizing the solidification and stabilization of heavy metals in soil.
作者
周雷
嵇梦圆
桑文静
淡乙桐
王晓霞
ZHOU Lei;JI Mengyuan;SANG Wenjing;DAN Yitong;WANG Xiaoxia(Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection,College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;CRIBI Biotechnology Center,University of Padua,35121 Padova,Italy)
出处
《化工环保》
CAS
CSCD
北大核心
2021年第5期612-617,共6页
Environmental Protection of Chemical Industry
基金
中央高校基本科研业务费专项资金项目(2232018D3-15)
天津市重点研发计划科技支撑重点项目(18YFZCSF00640)
污染控制与资源化研究国家重点实验室自主课题项目(PCRRF19001)。
关键词
生物炭
重金属
CD
PB
固化
稳定化
biochar
heavy metal
Cd
Pb
solidification
stabilization
