钝化剂对土壤有效态镉、铅及其在三叶青块根中累积的影响
Effect of Passivators on the Contents of Available Cadmium and Available Lead in Soil and Their Accumulation in Tetrastigma hemsleyanum Roots
王贤波 1阮松林 1朱霄岚 2钱丽华 1童朝明 1严建立1
作者信息
- 1. 杭州市农业科学研究院,浙江 杭州 310024
- 2. 桐庐县农业技术推广中心,浙江 杭州 311500
- 折叠
摘要
采用温室大棚内袋栽培的方法,研究了有机肥、生物炭、海泡石及生物炭和海泡石的混合物(质量比为 1 ∶1)对重金属污染土壤的pH值、镉和铅有效态含量的影响,并分析了三叶青块根中镉、铅含量的变化.结果表明,不同钝化剂处理均能不同程度提高土壤pH值,降低土壤中有效态镉、铅含量,降低三叶青块根中镉、铅含量.与对照相比,添加 w 为 1%～5%的钝化剂可使土壤 pH 值升高 0.05～1.03,土壤中有效态镉、铅含量分别降低2.95%～42.46%和 6.21%～55.77%,三叶青块根中镉、铅含量分别降低 15.61%～48.33%和 8.18%～61.67%,其中以添加 5%的生物炭和海泡石的混合物对土壤的pH值、镉和铅有效态含量及三叶青块根中镉、铅含量的影响最大,说明在土壤-三叶青体系的重金属钝化修复中,添加w为 5%的混合钝化剂(生物炭与海泡石质量比为 1 ∶ 1)效果最佳.
Abstract
Experiments of bagging in greenhouse were performed to investigate the effect of organic fertiliser,biochar,sepiolite and the mixture of biochar and sepiolite(1 ∶ 1)on soil pH and the contents of available Cd and available Pb in heavy metal contaminated soil,and the changes in the cadmium and lead contents of Tetrastigma hemsleyanum roots were analyzed.The results show that the different passivators all increased soil pH in varying degrees,reduced the contents of available Cd and available Pb in soil and reduced the contents of Cd and Pb in Tetrastigma hemsleyanum roots.Compared with the control,the addition of 1%to 5%passivators could increase soil pH value by 0.05 to 1.03,respectively,reduce the contents of available Cd and available Pb in soil by 2.95%-42.46%and 6.21%-55.77%,respectively,and reduce the contents of Cd and Pb in Tetrastigma hemsleyanum roots by 15.61%-48.33%and 8.18%-61.67%,respectively.The addition of 5%of the mixture of biochar and sepiolite had the greatest effect on pH value on the contents of available Cd and available Pb in soil,and on those of Cd and Pb in the Tetrastigma hemsleyanum roots,which indicates that the addition of 5%mixed passivator(the weight ratio of biochar and msepiolite is 1 ∶ 1)was the most effective in the passiva-tion remediation of heavy metals in the soil-Tetrastigma hemsleyanum system.
关键词
钝化剂/三叶青/有效态镉/有效态铅Key words
passivator/Tetrastigma hemsleyanum/available Cd/available Pb引用本文复制引用
基金项目
杭州市农业与社会发展科研项目(20201203B115)
杭州市农科院科技创新与示范推广基金(2022HNCT-07)
出版年
2024
国家科技期刊平台
NSTL
万方数据