摘要
采用热脱附技术修复石油污染土壤,并分析热脱附主要影响因素、石油烃组分去除效果以及热解油组分。结果表明:(1)对于初始含油率8.86%、含水率3.5%的河南油田石油污染土壤,400℃恒温3.0 h或500℃恒温1.5 h、升温速率10℃/min为优化热脱附条件。(2)在低温阶段(100~300℃),饱和烃、芳烃去除率分别为96.97%、78.00%,胶质和沥青质去除率较低;在高温阶段(400~500℃),芳烃去除率高于97%;若要去除沥青质与胶质则需要更高的加热温度(>500℃)。(3)400℃恒温3.0 h后回收的热解油、饱和烃质量更高。
Thermal desorption technology was used to repair petroleum contaminated soil,and the main influencing factors of thermal desorption,the removal effect of petroleum hydrocarbon components and pyrolysis oil components were analyzed.The results showed:(1)for the petroleum contaminated soil in Henan Oilfield with initial oil content of 8.86%and moisture content of 3.5%,the optimized thermal desorption conditions were 400℃for 3.0 h or 500℃for 1.5 h,and heating rate of 10℃/min.(2)In the low temperature stage(100-300℃),the removal rates of saturated hydrocarbons and aromatics were 96.97%and 78.00%respectively,and the removal rates of gum and asphaltene were low.In the high temperature stage(400-500℃),the aromatics removal rate was higher than 97%.Higher heating temperature(>500℃)was required to remove asphaltene and gum.(3)The mass of pyrolysis oil and saturated hydrocarbon recovered at 400℃for 3.0 h was higher.
作者
牛明芬
李宏伟
徐铭
李刚
王卅
NIU Mingfen;LI Hongwei;XU Ming;LI Gang;WANG Sa(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168;Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang Liaoning 110016)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2021年第8期980-983,1034,共5页
Environmental Pollution & Control
基金
国家重点研发计划项目(No.2018YFC1801900)。
关键词
石油污染土壤
热脱附
影响因素
组分
热解油
petroleum contaminated soil
thermal desorption
influencing factors
component
pyrolysis oil
