Ozonation of dye wastewater by membrane contactor using PVDF and PTFE membranes
Ozonation of dye wastewater by membrane contactor using PVDF and PTFE membranes
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DOI：
10.1016/j.seppur.2010.02.006
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发表时间：
2010-04-20
影响因子：
8.6
通讯作者：
Jiraratananon, Ratana
中科院分区：
文献类型：
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作者：
Bamperng, Sahawet;Suwannachart, Tarakorn;Jiraratananon, Ratana
研究了臭氧氧化膜接触法对染料废水的脱色效果。三种不同的染料，选择了直接红23、酸性蓝113和活性红120作为染料。考察了气液流速、液相温度、染料助剂等操作参数对传质过程的影响，并进行了沿着研究。在这项工作中使用的膜是PVDF和PTFE中空纤维膜。研究了两种膜的臭氧传质性能和臭氧氧化的长期性能。此外，在间歇式反应系统中，考察了不同操作参数和染料种类对臭氧氧化脱色性能和动力学的影响，结果表明，臭氧传质随液速、液相温度和Na2CO3的存在而增大。相反，臭氧通量不受气体流速的影响。PVDF膜的臭氧通量比PTFE膜高，但PTFE膜在较长运行周期内的臭氧通量比PVDF膜稳定。不同类型染料的臭氧通量大小顺序为：直接红23>活性红120>酸性蓝113。酸性蓝113的脱色率高于直接红23和活性红120。动力学分析表明，染料的脱色符合一级动力学，其速率常数顺序为：酸性蓝113>活性红120>直接红23。(C)2010 Elsevier B.V.保留所有权利。
This work aimed to study the decolorization of dye wastewater by ozonation membrane contacting process. Three different dyes, i.e., Direct red 23, Acid blue 113 and Reactive red 120 were selected to be used in this work. The effects of operating parameters which were gas and liquid velocity, liquid phase temperature, dye auxiliary reagents were investigated along with the mass transfer study. Membranes used in this work were PVDF and PTFE hollow fiber membranes. The ozone mass transfer performance and long term performance in ozonation by these two different types of membrane were studied. In addition, decolorization performance and kinetic study of ozonation in the batch system with various operating parameters and dye types were investigated.From the results, the ozone mass transfer increased with increasing liquid velocity, liquid phase temperature, and with the presence of Na2CO3. On the contrary, the ozone flux was not influenced by gas velocity. PVDF membrane provided higher ozone flux than PTFE, but PTFE membrane gave more stable and higher flux than PVDF for a long operation period. The ozone flux of different types of dye was in the following order: Direct red 23> Reactive red 120> Acid blue 113. Conversely, the decolorization performance of Acid blue 113 was higher than those of Direct red 23 and Reactive red 120. Kinetic analysis showed that decolorization of dyes followed the first order kinetics and the rate constants were in the following order: Acid blue 113> Reactive red 120> Direct red 23. (C) 2010 Elsevier B.V. All rights reserved.