RPB-Mn^(2+)/H_2O_2/O_3处理硝基苯废水  

Degradation of nitrobenzene wastewater with Mn^(2+)/ H_2O_2/O_3 in a rotating packed bed

作　　者：王永红[1,2] 焦纬洲[1,2] 刘有智[1,2] 杨鹏飞[1,2] 秦月娇 李现龙[1,2] 

机构地区：[1]中北大学山西省超重力化工工程技术研究中心,山西太原030051 [2]超重力化工过程山西省重点实验室,山西太原030051

出　　处：《现代化工》2016年第11期98-101,103,共5页Modern Chemical Industry

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)

摘　　要：在旋转填料床(RPB)中考察了Mn^(2+)/H_2O_2/O_3处理硝基苯废水的效果。考察了Mn^(2+)浓度、初始p H、超重力因子β、H_2O_2浓度、液体流量对硝基苯去除效果的影响。结果表明,硝基苯去除率随Mn^(2+)浓度、p H、超重力因子β、H_2O_2浓度、液体流量的增加呈先增加后减小的趋势。当硝基苯质量浓度为150 mg/L时,在Mn^(2+)浓度为1.8 mmol/L,p H 2.5,超重力因子β=40,臭氧质量浓度为40 mg/L,H_2O_2浓度为5.0 mmol/L,液体流量为120 L/h,循环处理25 min的条件下,硝基苯去除率和TOC去除率分别可达99.82%、59.24%,硝基苯质量浓度为0.27 mg/L,达国家一级排放标准(GB 8978—1996)。相同实验条件下,硝基苯去除率比RPB-O_3/H_2O_2提高了21.43%,TOC去除率比RPB-O_3/H_2O_2提高了21.08%。Degradation of nitrobenzene wastewater with Mn2＋/H2O2/O3 is studied in a rotating packed bed （RPB）. The effects of high gravity factor β, n2O2 concentration, initial pH value, liquid flow rate and Mn2＋ concentration on the removal rate of nitrobenzene are investigated. The results show that the nitrobenzene efficiency sis firstly increased and then decreased with the increase of high gravity factor β, H2O2 concentration, initial pH value, liquid flow rate and Mn2＋ concentration ,respectively. When the concentration of nitrobenzene is 150 mg/L, the removal rate of nitrobenzene and the removal rate of TOC reached 99. 82% and 59. 24% respectively, under the following conditions：l. 8 mmol/L of Mn2＋ concentration,β = 40, 2. 5 of the initial pH, 40 mg/L of ozone mass concentration, 5.0 mmol/L of H2O2 concentration, 120 L/h of liquid flow rate and 25 minutes of recycling time. The residual concentration of nitrobenzene concentration is 0. 27 mg/L, meeting the first national level emission standard （GB 8978-1996）. Under the same experimental conditions, the removal rate of nitrobenzene is increased by 21.43% compared with RPB-O3/H2O2, and the removal rate of TOC is also increased by 21.08% compared with RPB-O3/H2O2.

关 键 词：旋转填料床 臭氧 双氧水 硝基苯 锰离子 

分 类 号：X703.1[环境科学与工程—环境工程]