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Effects of sepiolite on stabilization remediation of heavy metal-contaminated soil and its ecological evaluation

ISSN号：1001-8336
期刊名称：《蔬菜》
时间：0
分类：X53[环境科学与工程—环境工程]
作者机构：[1]天津农学院工程技术学院,天津300384, [2]农业部环境保护科研监测所,农田重金属污染修复创新团队,天津300191, [3]农业部产地环境质量重点实验室,天津300191
相关基金：国家级大学生创新创业训练计划项目（201410061126）;农业部产地环境质量重点实验室开放基金项目（2013-KFJJ-01）;国家自然科学基金项目（21177068）;中国农业科学院创新工程项目（2014-cxgc-xym）

作者： Yuebing SUN[1], Dan ZHAO[2], Yingming XU[1], Lin WANG[1], Xuefeng LIANG[1], Yue SHEN[1]

关键词：生物炭, 鸡粪, 复合肥, 镉, 土壤修复, biochar, chicken manure, compound fertilizer, Cd, soil remediation

中文摘要：

通过田间实验,研究了生物炭与有机肥及氮磷钾复合肥复配施用对菜地土壤重金属镉污染钝化修复效应,并探讨了作用机制。结果表明,菜地土壤添加不同钝化材料可显著降低油麦菜地上可食部位Cd的累积量,降幅可达32.6%～54.8%,各钝化处理的菜地土壤有效态Cd含量均出现显著降低,降幅可达7.04%～21.85%,施用生物炭可以显著提高菜地土壤pH值,有利于促进对土壤重金属Cd活性的钝化作用;而施用鸡粪却明显降低菜地土壤pH值,不利于菜地土壤重金属Cd的钝化作用。土壤pH值与油麦菜根部Cd累积量间呈显著的正相关性,但与油麦菜地上可食部位Cd累积量间的相关性并未达到显著性水平。该项研究可为生物炭与有机肥及氮磷钾复合肥复配修复污灌菜地土壤重金属镉污染提供一定的理论基础。

英文摘要：

The field experiment was employed to study on the combined effects of biochar and chicken manure and N, P and K compound chemical fertilizer on cadmium contaminated soil remediation, and the immobilization mechanism was elucidated through fractionation of cadmium in the tested soil. Results showed that the addition of these ammendments could significantly reduce the edible Cd accumulation in Lactuca sativa L., decreased from 32.6% to 54.8% compared with the control. The application of these additives could also significantly decrease extractable Cd concentration by 7.04%～21.85%. Biochar could significantly improve soil pH value, promote the inactivation of Cd contaminated soil, while the application of chicken manure significantly decreased soil pH value, which showed the effect of activating Cd in soil. Soil pH value had significant positive correlation with root Cd concentration of tested cultivars, but did not reach the significant effect level with the shoot Cd concentration. The research can provide a theoretical basis for the application of hiochar combined with chicken manure and N, P and K compound chemical fertilizer on remediation of sewage irrigated Cd contaminated soil.

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