Abstract

This paper is concerned about the application of glow discharge plasma for the remediation of petroleum pollution of the sea. We used diesel fuel as the processing target and conducted a series of lab-scale studies. Several factors including the discharge voltage, gas flow rate, the concentration of NaCl, initial temperature, and initial concentration of diesel fuel can influence the performance of glow discharge plasma systems on removal efficiency of diesel fuel. To determine the optimal reaction conditions, the diesel degradation rate and energy efficiency were calculated. The experiment result for 2178 mg/L diesel fuel solution treatment was that removal efficiency of 93.3% was achieved after 12 min treatment with the energy yield of 17 g (kWh)⁻¹. Higher voltage leads to larger removal efficiency, while the energy yield may be reduced. The removal efficiency of diesel fuel reached the maximum at the gas flow rate factor 700 mL/min, decreased with an increase in gas flow rate, and became a minimum value when the gas flow rate is 1000 mL/min as a result of the unstable discharge. Decreasing the concentration of sodium chloride can cause an increase in the removal efficiency of diesel fuel, because the conductivity tended to significantly increase the degradation efficiency. Moreover, temperature and initial concentration are demonstrated to have little influence on the rate constant, but higher initial concentration favors higher energy efficiency. During the remediation of diesel fuel, pH decreases to 2.76, while the conductivity of the solution and temperature are increased, especially for the temperature, which has an increase from 25 °C to 63 °C.

Graphic abstract

中文翻译：

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等离子体修复海洋石油污染

摘要

本文关注辉光放电等离子体在海洋石油污染修复中的应用。我们以柴油为处理目标，并进行了一系列实验室规模的研究。放电电压，气体流量，NaCl的浓度，初始温度和柴油燃料的初始浓度等几个因素会影响辉光放电等离子体系统对柴油燃料去除效率的性能。为了确定最佳反应条件，计算了柴油的降解率和能效。2178 mg / L柴油溶液处理的实验结果是，处理12分钟后的去除率达到93.3％，能量产量为17 g（kWh）^-1。较高的电压导致较大的去除效率，而能量产率可能降低。柴油的去除效率在气体流量因子700 mL / min时达到最大值，随着气体流量的增加而降低，由于不稳定而在气体流量为1000 mL / min时，柴油的去除效率变为最小值。释放。降低氯化钠的浓度可导致柴油燃料的去除效率增加，因为电导率倾向于显着提高降解效率。而且，已证明温度和初始浓度对速率常数几乎没有影响，但是较高的初始浓度有利于较高的能量效率。在柴油燃料的修复过程中，pH降低至2.76，而溶液的电导率和温度均升高，

图形摘要