| 城市污泥好氧堆肥过程中重金属的形态变化 |
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| 引用本文： | 孙西宁,李艳霞,张增强,张永涛. 城市污泥好氧堆肥过程中重金属的形态变化[J]. 环境科学学报, 2009, 29(9): 1836-1841 |
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| 作者姓名： | 孙西宁 李艳霞 张增强 张永涛 |
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| 作者单位： | 西北农林科技大学理学院,杨凌,712100;北京师范大学环境学院水环境模拟国家重点实验室,北京,100875;延安大学能源与环境工程学院,延安,716000 |
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| 基金项目： | 国家自然科学基金项目(No.20377040);;陕西省自然科学基金项目(No.2005C105);;国家“十一五”科技支撑计划(No.2006BAD10B05)~~ |
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| 摘 要： | 污泥中重金属的含量和各重金属的生物有效性是污泥农业利用的重要限制因素.本研究对城市污泥进行了堆肥化处理,并采集不同阶段样品,通过顺序浸提法对样品中不同形态的重金属进行提取,分别利用原子吸收分光光度计测定Zn、Cu、Ni、Pb、Cd含量、分光光度法测定Cr和As含量.研究结果发现,与现有国际及我国污泥农用标准比较,所研究污泥中重金属含量均未超过允许的水平.污泥堆肥中Cu、Ni、Cd、Cr主要以残渣态形式存在,Cu、Ni、Pb、Cd四种重金属元素的可氧化态含量也相对较高,除Cd外,经过堆肥化处理后所有重金属的有效态含量均呈下降趋势,因此,堆肥可以促进污泥中的重金属稳定化,降低土壤的污染风险.
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| 关 键 词： | 重金属 顺序浸提 污泥 堆肥 |
| 收稿时间： | 2008-11-26 |
| 修稿时间： | 2009-04-19 |
Extractable forms of heavy metals produced during municipal sludge composting |
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| SUN Xining,LI Yanxi,ZHANG Zengqiang and ZHANG Yongtao. Extractable forms of heavy metals produced during municipal sludge composting[J]. Acta Scientiae Circumstantiae, 2009, 29(9): 1836-1841 |
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| Authors: | SUN Xining LI Yanxi ZHANG Zengqiang ZHANG Yongtao |
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| Affiliation: | College of Science, Northwest A& F University, Yangling 712100,State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875,College of Science, Northwest A& F University, Yangling 712100 and College of Energy and Environmental Engineering, Yan'an University, Yan'an 716000 |
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| Abstract: | The concentration of bio-available heavy metals in sludge is one of the major considerations for soil plant systems. Currently,land application of sludge and sludge products is determined by their total heavy metal concentrations rather than bio-available metal concentrations. Hence it is important to determine the bio-available heavy metal concentrations of sludge and sludge products for their efficient use in agricultural applications. In the present study,sludge samples composted for different durations ... |
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| Keywords: | heavy metals sequential extraction sludge compost |
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