小麦秸秆生物炭稳定土壤中金属镉及微生物群落响应  

Stabilization of cadmium in soil by wheat straw biochar and response of microbial community

作　　者：王莉[1,2] 王忠晨 张广毅[1,2] 艾佳鑫 徐敏[1,2] WANG Li;WANG Zhongchen;ZHANG Guangyi;AI Jiaxin;XU Min(College of Water Conservancy and Civil Engineering,Zhengzhou University,Zhengzhou 450001,China;National Experimental Teaching Demonstrating Center of Water Conservancy and Environment,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学水利与土木工程学院,河南郑州450001 [2]郑州大学水利与环境国家级实验教学示范中心,河南郑州450001

出　　处：《化工环保》2023年第2期200-205,共6页Environmental Protection of Chemical Industry

摘　　要：将小麦秸秆生物炭(WSB)投加至镉(Cd)污染土壤中,考察了WSB对土壤中Cd存在形态、土壤理化性质和土壤微生物群落及功能基因的影响。实验结果表明:WSB对土壤弱酸可提取态Cd的去除率为34.20%;添加WSB后,土壤pH由7.68上升至9.07,氨氮含量由70.12 mg/kg降低至40.76 mg/kg,硝态氮含量由107.21 mg/kg增加至143.85 mg/kg,土壤阳离子交换量(CEC)由14.59 cmol/kg增加至19.93 cmol/kg,土壤有机碳(SOC)含量由7.00%增加至12.23%。土壤微生物群落分析结果表明,添加WSB有利于提高土壤微生物群落的多样性,同时能够促进与土壤碳循环和重金属去除相关的微生物功能基因响应。Wheat straw biochar(WSB)was added to cadmium-contaminated soil.The effect of WSB on the existing forms of Cd in soil and the physical and chemical properties of soil,as well as on soil microbial community and functional genes were investigated.The experimental results show that:The removal rate of weak acid extractable Cd by WSB is 34.20%;After adding WSB,the soil pH increases from 7.68 to 9.07,the ammonia nitrogen content decreases from 70.12 mg/kg to 40.76 mg/kg,the nitrate nitrogen content increases from 107.21 mg/kg to 143.85 mg/kg,the soil cation exchange capacity(CEC)increases from 14.59 cmol/kg to 19.93 cmol/kg,the soil organic carbon content(SOC)increases from 7.00%to 12.23%.Soil microbial community analysis results show that the addition of WSB can improve the diversity of soil microbial community,and promote the response of microbial functional genes related to soil carbon cycle and heavy metal removal.

关 键 词：镉污染土壤 小麦秸秆生物炭 稳定化技术 微生物功能基因 

分 类 号：X705[环境科学与工程—环境工程]