超声强化铁碳微电解处理硝基苯废水

发布时间：2018-10-24 21:28

【摘要】：针对铁碳微电解处理有机废水时铁碳填料易钝化、难连续可用性的问题,采用超声波(US)-零价铁/活性炭(Fe0/GAC)微电解技术降解硝基苯废水。考察了铁碳填料连续使用性,考察了Fe0剂量、GAC剂量、废水初始p H值对US-Fe0/GAC降解硝基苯的影响规律。结果表明:不更换填料时,US-Fe0/GAC连续处理4批相同废水的硝基苯去除率均在90%左右;而在Fe~0/GAC处理下,4次硝基苯去除率依次为48%、36%、25%、17%。超声不仅维持了填料高活性使其能被连续使用,有效提高了Fe~0/GAC对硝基苯去除率。得到降解硝基苯的适宜操作条件为:Fe0剂量20 g·L~(-1),GAC剂量10 g·L~(-1),废水初始p H为4。在此条件下,反应80min,硝基苯的去除率可达93%,出水的可生化系数BOD5/CODcr为0.32,能满足生化处理要求。
[Abstract]:To solve the problem that iron-carbon filler is easily passivated and difficult to be used continuously in the treatment of organic wastewater, ultrasonic (US) zero-valent iron / activated carbon (Fe0/GAC) microelectrolysis technology is used to degrade nitrobenzene wastewater. The effects of Fe0 dosage, GAC dose and initial pH value of wastewater on the degradation of nitrobenzene by US-Fe0/GAC were investigated. The results showed that the removal rate of nitrobenzene in four batches of wastewater treated continuously by US-Fe0/GAC was about 90% without changing fillers, while in Fe~0/GAC treatment, the removal rate of nitrobenzene for four times was 4836 and 251717 respectively. Ultrasound not only maintains the high activity of filler so that it can be used continuously, but also improves the removal efficiency of nitrobenzene by Fe~0/GAC. The optimum operating conditions for the degradation of nitrobenzene were as follows: Fe0 dosage 20g L ~ (-1), GAC dose 10g L ~ (-1), the initial pH of wastewater was 4g / L ~ (-1). Under these conditions, the removal rate of nitrobenzene can reach 933% and the biochemical coefficient of effluent BOD5/CODcr is 0.32, which can meet the requirements of biochemical treatment.
【作者单位】：中北大学山西省超重力化工工程技术研究中心;超重力化工过程山西省重点实验室;
【基金】：国家自然科学基金资助项目(21206153) 山西省优秀青年基金项目(2014021007) 山西省高等学校创新人才支持计划资助项目(201316)
【分类号】：X789

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