挥发性有机污染场地土壤修复小试
A PILOT STUDY ON SOIL REMEDIATION OF VOLATILE ORGANIC CONTAMINATED SITE
游洋洋 1梁增强 2霍宁1
作者信息
- 1. 国环危险废物处置工程技术(天津)有限公司,天津 300280
- 2. 天津市环鉴环境检测有限公司,天津 300191
- 折叠
摘要
以典型农药生产场地污染土壤为研究对象,选取常温解吸、化学氧化和热解吸修复技术,对高污染(＞120 mg/kg)和低污染(＜25 mg/kg)土壤中苯、1,4-二氯苯和1,2-二氯苯进行修复试验.结果表明:常温解吸技术(生石灰+机械翻动)、化学氧化技术(碱活化过硫酸钠)和热解吸技术(200～400 ℃)对污染土壤中苯、1,4-二氯苯、1,2-二氯苯均有显著的去除作用,但不同修复技术的修复效果存在显著差异.常温解吸技术、碱活化过硫酸钠氧化技术在实验条件下尚不能完全满足修复要求,而热解吸(最优条件:温度为400 ℃、停留时间为20 min)技术对低污染和高污染土壤中3种目标污染物均能修复达标.
Abstract
The remediation techniques of benzene,1,4-dichlorobenzene,and 1,2-dichlorobenzene in soil with high pollution level(＞120 mg/kg)and low pollution level(＜25 mg/kg)were used to study the remediation of soil contaminated by typical pesticide production sites.The results showed that the removal of benzene,1,4-dichlorobenzene,and 1,2-dichlorobenzene from contaminated soil was significantly affected by normal temperature desorption(quicklime+mechanical stirring),chemical oxidation(alkali activated sodium persulfate)and thermal desorption(200～400 ℃),but the effect of different remediation techniques was significantly different.Normal temperature desorption technology and alkali activated sodium persulfate oxidation technology could not fully meet the remediation requirements under experimental conditions,while thermal desorption technology(optimal conditions:temperature of 400 ℃,residence time of 20 min)could meet the remediation standards for the three target pollutants in soil with low and high pollution levels.
关键词
化学氧化/常温解吸/热解吸/挥发性有机物/土壤修复Key words
chemical oxidation/desorption at room temperature/thermal desorption/volatile organic compounds(VOCs)/soil remediation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据