辉光放电等离子体处理活性艳红X-3B染料废水实验研究

Degradation of Reactive Brilliant Red X-3B Dye in Wastewater Using Glow Discharge Plasma

辉光放电电解是一种新型的电化学过程,其中等离子体由电极和电解质液面之间的直流辉光放电来维持。在惰性电解质水溶液中进行辉光放电电解,可以产生大量的·OH、·H、e-aq、HO2·等活性粒子,进而降解各种有机物。文章采用辉光放电等离子体降解活性艳红X-3B,详细考察了多种因素对活性艳红降解效果的影响。实验发现,提高溶液酸度和增加电压均可提高活性艳红的脱色效果,加入一定量Fe2+能明显提高活性艳红的脱色效率。优化后的最佳条件为:电压为570 V,p H为3.04,活性艳红初始浓度为60 mg/L,Fe2+的用量为2 mmol/L,20 min内活性艳红的脱色率达到98.8%。

Glow discharge electrolysis（GDE） is a new kind of electrochemical technique for producing plasma. In the glow discharge electrolysis, inert electrolyte solution can produce a lot of active species, such as ·OH, ·H, e-aq, HO2·, which can degrade various organic matter. This study discussed the effect on the degradation of Reactive Brilliant Red Dye X-3B using glow discharge plasma. Experiments showed that this method can degrade most dye in the water. The decoloration rate of Reactive Brilliant Red Dye could be increased considerably by increasing solution acidity and voltage applied. Addition of Fe2＋ can increase the rate of decoloration, too. The optimum experimental conditions are as follows： voltage, 570 V; p H, 3.04; reactive brilliant red, 60 mg/L; Fe2＋, 2 mmol/L. The decolorization rate reached 97.16 % in 20 min with the glow discharge electrolysis.