【摘要】：針對鐵碳微電解處理有機廢水時鐵碳填料易鈍化、難連續(xù)可用性的問題,采用超聲波(US)-零價鐵/活性炭(Fe0/GAC)微電解技術(shù)降解硝基苯廢水。考察了鐵碳填料連續(xù)使用性,考察了Fe0劑量、GAC劑量、廢水初始p H值對US-Fe0/GAC降解硝基苯的影響規(guī)律。結(jié)果表明:不更換填料時,US-Fe0/GAC連續(xù)處理4批相同廢水的硝基苯去除率均在90%左右;而在Fe~0/GAC處理下,4次硝基苯去除率依次為48%、36%、25%、17%。超聲不僅維持了填料高活性使其能被連續(xù)使用,有效提高了Fe~0/GAC對硝基苯去除率。得到降解硝基苯的適宜操作條件為:Fe0劑量20 g·L~(-1),GAC劑量10 g·L~(-1),廢水初始p H為4。在此條件下,反應(yīng)80min,硝基苯的去除率可達(dá)93%,出水的可生化系數(shù)BOD5/CODcr為0.32,能滿足生化處理要求。
[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.
【作者單位】： 中北大學(xué)山西省超重力化工工程技術(shù)研究中心;超重力化工過程山西省重點實驗室;
【基金】：國家自然科學(xué)基金資助項目(21206153) 山西省優(yōu)秀青年基金項目(2014021007) 山西省高等學(xué)校創(chuàng)新人才支持計劃資助項目(201316)
【分類號】：X789

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本文編號：2292609