不同土壤钝化剂对土壤镉生物有效性的影响
Effects of Different Passivators on Bio-availability of Cd in Soil
李婧 1陈森 1周艳文 1高小杰1
作者信息
- 1. 南京市环境保护科学研究院,江苏南京210013
- 折叠
摘要
[目的]寻找有效控制Cd污染土壤上小白菜对重金属Cd吸收的技术方法.[方法]2015年进行小白菜盆栽试验,选取生物质炭、凹凸棒石、石灰石作为土壤Cd钝化剂.于小白菜收获时,取样分析小白菜产量、株高,以及小白菜和土壤中Cd含量.[结果]施用3种钝化剂均增加土壤速效钾含量,提高土壤pH,促进小白菜生长;施用3种钝化剂可显著增加土壤对Cd的吸持固定,降低土壤生物有效性Cd含量,显著降低小白菜地上部Cd含量和小白菜对Cd的富集系数;3种钝化剂对Cd污染土壤的治理效果表现为:石灰石>凹凸棒石>生物质炭.[结论]该研究可为污染土壤上农作物的安全生产提供参考.
Abstract
[Objective]To find an effective technical method to control the absorbtion of Cd in soil by Chinese cabbage.[Method]A pot experiment was carried out,in which biochar,attapulgite and limestone was used as passivators of Cd in soil.The output,plant height of Chinese cabbage,and Cd content in plant and soil were analyzed .[ Result] All of the three passivators increased the available potassium content ,the cadmium content and pH in soil,and promoted the growth of Chinese cabbage;while reduced the bio-available Cd content in soil,the Cd content in over-ground part of Chinese cabbage and the enrichment factor of Cd by Chinese cabbage .The governance effects of three passivators in this experiment showed limestone>attapulgite>biochar.[Conclusion]The research can provide reference for crop producing safely in polluted soil.
关键词
Cd污染/生物有效性Cd/钝化剂/小白菜Key words
Cd contaminant/bio-available Cd/Passivators/Chinese cabbage引用本文复制引用
基金项目
南京市环境保护局2013年度环保课题计划(201306)
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据