过硫酸盐
高锰酸盐
铁质
化学
环境修复
环境化学
碳氢化合物
总石油烃
过氧化氢
土壤水分
催化氧化
催化作用
土壤污染
高锰酸钾
污染
无机化学
环境科学
有机化学
生态学
土壤科学
生物
作者
Bo Yang,C. L. Kao,Chiu Wen Chen,Wen‐Tsai Sung,Rao Y. Surampalli
出处
期刊:Applied Mechanics and Materials
[Trans Tech Publications, Ltd.]
日期:2011-10-01
卷期号:121-126: 196-200
被引量:2
标识
DOI:10.4028/www.scientific.net/amm.121-126.196
摘要
Soils at many existing and former industrial areas and disposal sites are contaminated by petroleum hydrocarbons. In this study, laboratory bench-scale experiments were performed to evaluate the effectiveness of applying in situ chemical oxidation (ISCO) on the treatment of petroleum-hydrocarbon contaminated soils. Three different oxidation processes including Fenton’s oxidation, persulfate oxidation, and permanganate oxidation were evaluated with initial total petroleum hydrocarbon (TPH) concentration of approximately 3,920 mg/kg. The major control factors were oxidant species (hydrogen peroxide, persulfate, permanganate) and soil to liquid volume ratios (1 to 3). The oxidant concentration was 5 wt.%. Ferrous iron was used as the catalyst during the Fenton’s oxidation and persulfate oxidation processes, and the oxidant to ferrous iron molar ratio was 1 to 0.1. Among these three oxidation processes, contaminated soils treated by permanganate oxidation had the highest TPH removal efficiency (94% of TPH removal) during 360 min of operation. Approximately 75 and 61% of TPH removal was observed in batch experiments applying Fenton’s oxidation and persulfate oxidation, respectively. Due to the consumption of ferrous iron (used as the catalytic chemical) in the early stage during the operational period, both persulfate and Fenton’s oxidation processes had less TPH removal efficiencies. Frequent supplement of catalyst is required when persulfate and Fenton’s oxidation is applied for field application. Results from this study indicate that the ISCO scheme is a feasible technology for the treatment of petroleum-hydrocarbon contaminated soils within a short treatment period. The experimental results can be used for a scale-up system for practical application.
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