河南农业科学2024，Vol.53Issue(8)：70-78,9.DOI:10.15933/j.cnki.1004-3268.2024.08.008
γ-聚谷氨酸改性生物炭对镉污染土壤的修复作用
Remediation of Cadmium Contaminated Soil by γ-Polyglutamic Acid Modified Biochar
摘要
Abstract
In order to strengthen the remediation effect of biochar on cadmium-contaminated soil,γ-polyglutamic acid was used to activate and modify corn straw biochar.The structure of γ-polyglutamic acid modified biochar was characterized by scanning electron microscopy and infrared spectroscopy.The passivation effect of γ-polyglutamic acid modified biochar on Cd2+was investigated by simulating soil cadmium pollution test.The results showed that the number of hydroxyl and carboxyl functional groups of γ-polyglutamic acid modified biochar increased significantly.Compared with the application of 1.0% original biochar,applying equal amount of γ-polyglutamic acid modified biochar in cadmium-contaminated soil significantly increased the soil cation exchange capacity,organic matter content,soil phosphatase,catalase and urease activities by 9%,17%,18%,15%and 20%,respectively.The content of residual Cd in soil increased by 15%,the content of weak acid extractable Cd decreased by 27%,and the bioavailability of Cd2+in soil decreased significantly.The content of Cd2+in roots and leaves of Chinese cabbage decreased significantly.In summary,γ-polyglutamic acid modification can improve the ability of biochar to passivate cadmium in soil,and γ-polyglutamic acid modified biochar has great potential in the remediation of cadmium contaminated soil.关键词
镉/土壤修复/改性生物炭/γ-聚谷氨酸/生物有效性Key words
Cadmium/Soil remediation/Modified biochar/γ-polyglutamic acid/Biological effectiveness分类
农业科技引用本文复制引用
李志娟,贺文星,张来星,刘铮,孙丹,徐淑霞..γ-聚谷氨酸改性生物炭对镉污染土壤的修复作用[J].河南农业科学,2024,53(8):70-78,9.基金项目
河南省重点研发专项(221111112300) （221111112300）
河南省科技攻关项目(222102110120) （222102110120）
河南省地质研究院2023年度地质科技攻关项目(2023-906-XM014-KT01) （2023-906-XM014-KT01）
