环境化学
环境科学
土壤肥力
氮氧化物
汽油
非热等离子体
土壤污染
氮气
环境工程
化学
土壤水分
土壤科学
燃烧
等离子体
物理
有机化学
量子力学
作者
Jiaxun Zhan,Zhang Ai,Paul Héroux,Xiang Li,Zhenyu Li,Jingyi Zhao,Ying Guo,Yanan Liu
标识
DOI:10.1016/j.scitotenv.2019.01.183
摘要
Gasoline contaminated soil poses an environmental and human health problem, which may be partially solved by the emerging non-thermal plasma technology. In this study a pulse corona discharge (PCD) reactor was employed to degrade gasoline in soil and simultaneously to fix nitrogen in soil. The gasoline removal rates were influenced by input power, electrode gap, gas flow rate, initial gasoline concentration, soil pH, and soil moisture. This technology produced no secondary pollution. Ozone, NOx, and hydroxyl radicals, generated directly on the soil surface, were identified as the primary agents responsible for gasoline degradation. The role of the major active agents was determined by ventilating different gases during the corona discharges. In addition, the concentration of nitrate and wettability of soil was increased after the treatment. Safety and fertility of treated soil were investigated by planting lettuce. Thus, soil pollution was remediated using this non-thermal plasma treatment, while simultaneously improving soil nitrogen content and physical characteristics. This process potentially enhances soil fertility and revegetation, since this environmentally-friendly method does not involve other chemicals injections.
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