Desorption of Nitroaromatic Compounds From Explosive-contaminated Soil by Washing

IF 1.6 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Soil & Sediment Contamination Pub Date : 2016-08-24 DOI:10.1080/15320383.2016.1224227

X. Wenjie, Zhao Quan-lin, Jia Zhenming, Z. Zhenzhong, Ye Zhengfang

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引用次数: 1

Abstract

ABSTRACTThe soil contaminated by explosive production wastewater was treated by washing using water as solvent. The effect of contact time and temperature, water/soil ratio and washing steps on desorption efficiency was investigated. Six kinetic models—parabolic diffusion model, zero-order equation, pseudo-first-order equation, pseudo-second-order equation, power function equation and Elovich equation—were used to study the desorption kinetics of nitroaromatic compounds from contaminated soil to water. The eluent of contaminated soil before and after washing was characterized by UV–vis analysis. The results showed that the removal rate was fast at the initial stage and then slowed down after 60 min. The desorption of contaminants from soil to water is endothermic. Washing with small quantities of water in high frequency is preferred when water volume is limited. The pseudo-second-order model can be used to describe the desorption process. Soil washing can remove most of the contaminants from the contamina...

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炸药污染土壤中硝基芳香族化合物的洗涤解吸

摘要以水为溶剂对爆炸生产废水污染的土壤进行了冲洗处理。考察了接触时间、温度、水/土比和洗涤步骤对解吸效率的影响。采用抛物扩散模型、零级方程、拟一阶方程、拟二阶方程、幂函数方程和Elovich方程6种动力学模型，研究了污染土壤中硝基芳香族化合物对水体的解吸动力学。用紫外-可见光谱法对污染土壤洗涤前后的洗脱液进行了表征。结果表明:在初始阶段，有机物的去除率较快，在60 min后，有机物的去除率逐渐变慢。土壤对水体的解吸是吸热的。当水量有限时，建议用少量的水高频清洗。拟二阶模型可以用来描述解吸过程。洗土可以去除污染物中的大部分污染物。

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来源期刊

Soil & Sediment Contamination 环境科学-环境科学

CiteScore

4.20

自引率

10.00%

发文量

审稿时长

2.2 months

期刊介绍： When it comes to assessing and mitigating contaminated soils and sediments, there is no substitute for having the very latest tools, techniques and methodologies at your fingertips to help you deal with these issues efficiently and cost-effectively. This is just the kind of essential expertise you’ll only find in Soil and Sediment Contamination . This internationally, peer-reviewed publication focuses on soil and sediment contamination from: -Sludges- Petroleum- Petrochemicals- Chlorinated hydrocarbons- Pesticides- Lead and other heavy metals. Get detailed descriptions of all the latest and most efficient offsite and in situ remediation techniques, strategies for assessing health effects and hazards, and tips for dealing with everyday regulatory and legal issues. With the state-of-the-art tools that Soil and Sediment Contamination provides, you can successfully assess, mitigate, and solve both rural and urban soil contamination problems as efficiently and economically as possible.