Abstract

A dielectric barrier discharge (DBD) plasma setup was developed to decompose phenol present in industrial wastewater by the varying discharge voltage and to study its effect on the degradation. Filamentary type of micro-discharge was found to be formed which was observed as numerous streamer clusters in the current waveform. The ozone gas generated from the reactor, was utilized directly and the percentage of the total organic carbon removal was calculated. The concentration of ozone responsible for the degradation of phenol was found to increase with an increase in the applied voltage and the treatment time. In the present study, more than 98% degradation of phenol has been achieved with the application of a voltage of 24 kV, which has been found to be superior as compared to the available reports. The degradation of phenol can be estimated from the UV-VIS spectra of the sample after 30 min of plasma treatment. Experimental parameters like pH and discharge current have also been varied and the results are analyzed. This indicates that the decomposition efficiency and total organic carbon (TOC) removal increase with increasing the input power. Thus, the process is expected to be of utmost importance for its potential application in wastewater treatment using plasma as the energy source.

中文翻译：

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介质阻挡放电等离子体技术降解工业酚醛废水

摘要

开发了电介质阻挡放电（DBD）等离子体装置，以通过变化的放电电压分解工业废水中存在的苯酚，并研究其对降解的影响。发现形成细丝类型的微放电，其在电流波形中观察为许多流光簇。从反应器中产生的臭氧气体被直接利用，并计算了总有机碳去除量的百分比。发现导致酚降解的臭氧浓度随施加电压和处理时间的增加而增加。在本研究中，通过施加24 kV的电压，苯酚的降解率达到98％以上，与现有报道相比，苯酚的降解率更高。等离子体处理30分钟后，可以从样品的UV-VIS光谱估算酚的降解。pH和放电电流等实验参数也已更改，并对结果进行了分析。这表明分解效率和总有机碳（TOC）去除量随输入功率的增加而增加。因此，预期该方法对于其在使用等离子体作为能源的废水处理中的潜在应用至关重要。