School of Environmental Science and Engineering, Dong Hua University, Shanghai, China.
State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai, China.
Environ Sci Pollut Res Int. 2017 Jan;24(2):1450-1458. doi: 10.1007/s11356-016-7929-x. Epub 2016 Oct 25.
Petroleum hydrocarbons released to the environment caused by leakage or illegal dumping pose a threat to human health and the natural environment. In this study, the potential of a pulsed corona discharge plasma system for treating petroleum-polluted soils was evaluated. This system removed 76.93 % of the petroleum from the soil in 60 min with an energy efficiency of 0.20 mg/kJ. Furthermore, the energy and degradation efficiencies for the remediation of soil contaminated by single polyaromatic hydrocarbons, such as phenanthrene and pyrene, were also compared, and the results showed that this technology had potential in organic-polluted soil remediation. In addition, the role of water molecules was investigated for their direct involvement in the formation and transportation of active species. The increase of soil moisture to a certain extent clearly benefitted degradation efficiency. Then, treated soils were analyzed by FTIR and GC-MS for proposing the degradation mechanism of petroleum. During the plasma discharging processes, the change of functional group and the detection of small aromatic hydrocarbons indicated that the plasma active species attached petroleum hydrocarbons and degradation occurred. This technique reported herein demonstrated significant potential for the remediation of heavily petroleum-polluted soil, as well as for the treatment of organic-polluted soils.
石油烃由于泄漏或非法倾倒而释放到环境中，对人类健康和自然环境构成威胁。在本研究中，评估了脉冲电晕放电等离子体系统处理石油污染土壤的潜力。该系统在 60 分钟内从土壤中去除了 76.93%的石油，能量效率为 0.20mg/kJ。此外，还比较了修复单种多环芳烃（如菲和芘）污染土壤的能量和降解效率，结果表明该技术在有机污染土壤修复方面具有潜力。此外，还研究了水分子的作用，因为它们直接参与了活性物质的形成和传输。土壤水分增加到一定程度明显有利于降解效率。然后，通过傅里叶变换红外光谱（FTIR）和气相色谱-质谱联用（GC-MS）对处理过的土壤进行分析，提出了石油降解的机理。在等离子体放电过程中，功能基团的变化和小芳烃的检测表明，等离子体活性物质附着在石油烃上并发生降解。本文报道的这项技术在修复重度石油污染土壤以及处理有机污染土壤方面具有很大的潜力。
