原位钝化对Cd污染农田棕壤的修复效果研究  

Research on remediation effects of in situ passivation for Cd contaminated brown soil

作　　者：董君能 王小兵[1,2] 汪晓丽 封克[1,2] 苏金成[1] 王海潮 程通 DONG Junneng;WANG Xiaobing;WANG Xiaoli;FENG Ke;SU Jincheng;WANG Haichao;CHENG Tong(College of Environmental Science and Engineering,Yangzhou University,Yangzhou Jiangsu 225127;Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization,Nanjing Jiangsu 210095)

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127 [2]江苏省有机固体废弃物资源化协同创新中心,江苏南京210095

出　　处：《环境污染与防治》2021年第7期829-833,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41471236);江苏省农业科技自主创新资金资助项目(No.CX(20)3082);2018年太仓市土壤安全利用与修复试点项目(No.TCGGZY-2018G106)。

摘　　要：对常规钝化剂在大田条件下对Cd污染农田(小麦种植棕壤)的修复效果进行评价。结果表明,钙镁磷肥、氯铝酸钙、凹凸棒土3种钝化剂均能不同程度地提升土壤pH、降低土壤有效态Cd含量以及小麦秸秆和籽粒中Cd含量,并提高小麦产量。施加钙镁磷肥1500 kg/hm^(2)(记为CMP1500)后,土壤pH提升效果最明显,pH提高了0.55;施加氯铝酸钙9000 kg/hm^(2)后土壤有效态Cd降幅最大,下降了57.4%。CMP1500处理后小麦秸秆和籽粒中Cd含量降幅最大,分别下降了73.4%、72.1%。CMP1500处理小麦增产最明显,增幅为16%。以土壤pH、土壤有效态Cd含量、小麦秸秆中Cd含量、小麦籽粒中Cd含量和小麦产量为评价指标,通过主成分分析研究不同处理的综合修复效果,结果表明,CMP1500的修复效果最好,可用于Cd污染农田小麦种植棕壤的原位钝化修复。The effects of conventional passivating agents on remediation performance of Cd-contaminated brown soil with wheat cropping under field conditions were evaluated.The results indicated that the three experimental passivators,calcium magnesium phosphate,chloride calcium aluminate and attapulgite,could increase soil pH,reduce the available Cd content in soil and Cd accumulation in wheat straw and grain,as well as increase the wheat yield to different degrees.Application of 1500 kg/hm^(2) calcium magnesium phosphate(recorded as CMP1500)increased soil pH by 0.55 unit,which showed the most obvious effects on soil pH increasing in all treatments.Available Cd content in soil decreased by 57.4%with application of 9000 kg/hm^(2) chloride calcium aluminate,which was the largest decline in the experiment.Treatment CMP1500 had the best effect on both Cd decreasing in wheat and wheat yield increasing,which decreased Cd contents in straw and grain by 73.4%and 72.1%respectively,and increased wheat yield by 16%.Soil pH,available Cd in soil,Cd content in wheat straw and grain and wheat yield were taken as parameters to evaluate the remediation effects of three experimental passivating agents by principle components analysis.Treatment CMP1500 was recommended as the best treatment for in situ remediation of Cd-contaminated brown soil with wheat cropping.

关 键 词：钝化剂 小麦 CD 棕壤 土壤修复 

分 类 号：X53[环境科学与工程—环境工程]