高压脉冲放电协同纳米催化剂降解苯酚废水

发布时间：2018-07-10 16:45

  本文选题：放电 + 纳米型催化剂　； 参考：《高电压技术》2017年08期

【摘要】：工业废水排放量逐年增多,其中含酚废水危害大,处理困难。为此,采用高压脉冲放电协同纳米型催化剂TiO_2和Fe-TiO_2对苯酚进行了降解处理实验,考察了催化剂的焙烧温度、投加质量对苯酚降解率的影响,并分析了苯酚中间产物质量浓度、溶液矿化率和总有机碳(TOC)质量浓度。结果显示:焙烧温度和投加质量对苯酚降解率有一定的影响,随着焙烧温度的升高、投加质量的增加,苯酚降解率均是先升高后降低;与单独脉冲放电相比,协同催化剂放电有效提高了苯酚降解率,且协同Fe-TiO_2催化剂的效果最佳;当Fe-TiO_2催化剂的投加质量为0.05 g,焙烧温度为450℃,放电时间为140 min时,苯酚降解率最高,达98.75%;中间产物质量浓度随放电时间的变化而呈现先增大后减小的趋势,相比单独脉冲放电,在协同TiO_2放电时间内苯二酚不再间断出现,且其他3种物质峰值质量浓度均有所提高,达到峰值质量浓度后的下降速度更快;相比投加TiO_2催化剂,在协同Fe-TiO_2放电时间内苯二酚完全降解,且对苯酚、对苯醌的峰值质量浓度均有所降低;投加催化剂后,矿化率提升幅度较大,相比单独脉冲放电,协同Fe-TiO_2放电时间为140 min时,溶液矿化率提高了1倍以上。研究结果可为脉冲放电协同催化剂技术处理苯酚废液提供一定的理论支撑。
[Abstract]:The discharge of industrial wastewater is increasing year by year, among which phenolic wastewater is harmful and difficult to treat. In this paper, the degradation experiments of phenol were carried out by using high pressure pulse discharge combined with nano-catalyst TiO2 and Fe-TiOs2. The effects of calcination temperature and adding quality on the degradation rate of phenol were investigated, and the concentration of intermediate product of phenol was analyzed. Solution mineralization rate and total organic carbon (TOC) mass concentration. The results showed that the degradation rate of phenol was affected by calcination temperature and adding quality. With the increase of calcination temperature, the degradation rate of phenol increased first and then decreased, and compared with the pulse discharge alone, the degradation rate of phenol increased firstly and then decreased with the increase of roasting temperature and adding quality. The synergistic catalyst discharge can effectively increase the phenol degradation rate, and the synergistic Fe-TiO-2 catalyst is the best, when the mass of Fe-TiO2 catalyst is 0.05 g, the calcination temperature is 450 鈩，

本文编号：2113994