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γ-Al_2O_3/O_3多相催化氧化深度处理制药尾水
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摘要
以γ-Al_2O_3为催化剂,构建γ-Al_2O_3/O_3多相催化臭氧氧化体系处理难降解制药尾水,考察了主要因素对废水污染物去除效果的影响,并分析了废水可生化性及主要污染物变化规律。结果表明:γ-Al_2O_3作为催化剂可显著提升臭氧氧化对废水污染物的去除效果,在催化剂投加量为1.0 g/L,初始pH为9.0,臭氧进气浓度为10.0 g/Nm~3,臭氧气体流量为48 L/h,温度为25℃的条件下,10min内可实现废水中DMP的完全降解,5.0 h后废水DOC去除率可达到35%;经过2.0 h的反应,废水B/C值由0.11增加到0.30,反应5.0 h后,废水B/C值增加到0.36,可生化性显著改善;GC-MS分析结果表明,γ-Al_2O_3/O_3臭氧催化氧化对制药尾水中难降解有机物具有较高的氧化降解效率,包括DMP在内的苯类物质能被迅速降解,随着反应的进行,部分中间产物也能彻底降解直至完全矿化。
引文
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