凹凸棒石施用对镉污染土壤理化性质及小白菜生长的影响
Effects of Attapulgite Application on Cd Contaminated Soil' s Physical and Chemical Properties and Chinese Cabbage' s Growth
李婧 1陈森 1周艳文 1高小杰 1张权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]明确凹凸棒石对重金属污染土壤中镉的治理效果.[方法]以小白菜为试验材料,开展小白菜盆栽试验,分析施用凹凸棒石后小白菜的长势、土壤养分和土壤重金属镉含量.[结果]适量添加凹凸棒石可有效增加小白菜的产量,提高酸性土壤的pH,但过量[≥2.0%(m/m)]添加会导致土壤速效养分降低;施用凹凸棒石对镉污染土壤的修复具有显著效果,可有效降低土壤有效镉含量和小白菜对镉的吸收.[结论]试验推荐凹凸棒石添加比例为1.0%.
Abstract
[Objective]TheObjective was to pinpoint the harness effect of Cd in soil by attapulgite .[Method]Using Chinese cabbage as test material, pot experiment was carried out.Growth vigor of Chinese cabbage and nutrient and heavy metal Cd content in soil were analyzed. [Result] Moderate addition of attapulgite could enhance the output of Chinese cabbage effectively, as well as soil pH ,while overdose of at-tapulgite (≥2.0%(m/m))could lead to the decline of soil available nutrients.Application of attapulgite showed significant effect on remedi-ation of Cd contaminated soil, which could reduce the content of available Cd in soil and the absorption of Cd in Chinese cabbage .[ Conclu-sion]Recommended adding proportion of attapulgite was 1.0 %( m/m) in this article.
关键词
凹凸棒石/镉污染/有效镉/小白菜Key words
Attapulgite/Cd contamination/Availability Cd/Chinese cabbage引用本文复制引用
基金项目
南京市环境保护局2013年度环保科研课题计划(201306)
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据