南京大学学报（自然科学版）2017，Vol.53Issue(2)：265-274,10.DOI:10.13232/j.cnki.jnju.2017.02.007
农田土壤镉污染的原位钝化修复及持久性研究
In situ immoblization of cadmium in soil and persistence study
摘要
Abstract
Soil Cd contamination is of great concern and often remediated by addition of amendments to reduce its mobilization.In this study,we compared a couple of commonly used soil amendments,such as calcium montmorillonite(MT),fused calcium-magnesium phosphate(CMP),phosphorus rock(PR).Triple superphosphate(TSP)and lime(L)using in-door pot experiments and testified the results with field experiments lasting 4 years from 2013-2016.Pot experiments using wheat showed that CMP+L had the best immobilization effect for Cd.The results of field experiments generally agreed with pot experiments.The first season showed the best immobilization effect for Cd,but the immobilization effect weakened with time.At the third crop season,the treatment of CMP+L and PR+L still significantly decreased Cd concentration in wheat.But all the amendments showed almost no effect on the fourth season.We also observed that the production of wheat increased in the first season with phosphorus materials,but this positive effect disappeared in the second season of wheat.In summary,the CMP+L was found to be the best amendments to reduce Cd risk to wheat.But the remediation effect needs to be monitored and further addition of amendments might be required to keep the immobilization effect.关键词
镉污染/固定剂/小麦/土壤修复Key words
Cadmium/amendments/wheat/soil remediation分类
信息技术与安全科学引用本文复制引用
姜洋,罗远恒,顾雪元..农田土壤镉污染的原位钝化修复及持久性研究[J].南京大学学报（自然科学版）,2017,53(2):265-274,10.基金项目
国家自然科学基金(21577062),江苏省重点研发项目(BE2015708),国家科技支撑计划(2015BAD05B04-01) （21577062）
