巯基改性膨润土制备的功能型肥料对土壤中Cd·Pb的修复效果
Effects of Functional Fertilizer Prepared by Thiol Modified Bentonite on Cd and Pb in Soil
李媛媛 1朱凰榕 1陈亚刚 1赵秋香1
作者信息
- 1. 广东省地质实验测试中心,广东广州 510080
- 折叠
摘要
[目的]为修复土壤重金属污染与提高肥料利用率提供科学依据.[方法]运用巯基改性膨土制备功能型肥料,研究其对土壤中重金属Cd、Pb污染的修复作用.[结果]盆栽试验结果显示,各功能型肥料均能够不同程度地提高农作物产量.针对土壤中不同程度的Cd污染,选择功能型钾肥或功能型氮、磷、钾肥混施,可取得较好的钝化效果;针对土壤中不同程度的Pb污染,选择功能型磷肥可取得较好的钝化效果;针对土壤中Cd/Pb复合污染,选择功能型氮、磷、钾肥混施可取得最佳的钝化效果.功能型肥料对Cd、Pb的钝化作用主要是将土壤中重金属由活性态转化为较稳定的形态.[结论]功能型肥料具有一定的肥效,能够为土壤提供养分,同时对土壤中重金属Cd、Pb污染有较好的修复效果.
Abstract
[Objective] The aim was to provide scientific basis for remediation of heavy metal pollution in soil and improvment of fertilizer utilization rate.[Method] Thiol modified bentonite was used to prepare functional fertilizer,and study its remediation effect on Cd,Pb pollution in soil.[Result] The results of pot experiment show ed that functional fertilizers can increase crop yield to varying degrees.For different degrees of cadmium pollution in the soil,functional potash or functional potash mixed with functional nitrogen and functional phosphate are better to remedy polluted soil.For different degrees of lead pollution in the soil,functional phosphate is the best altemative.And for the complex pollution of cadmium and lead in the soil,functional potash mixed with functional nitrogen and functional phosphate is the best alternative.The inactivation of functional fertilizers for cadmium and lead is functional fertilizers make heavy metals from the active state to stable state.[Conclusion] Functional fertilizer has certain efficiency and can provide nutrients for soil.
关键词
功能型/肥料/土壤/修复/重金属Key words
Functional/Fertilizer/Soil/Remediation/Heavy metal引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据