Effect of membrane filtration on ozonation efficiency for removal of atrazine from surface water
Effect of membrane filtration on ozonation efficiency for removal of atrazine from surface water
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DOI：
10.1021/ie200375j
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发表时间：
2011-06
影响因子：
4.2
通讯作者：
P. Luis;M. Saquib;C. Vinckier;B. Bruggen
中科院分区：
文献类型：
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作者：
P. Luis;M. Saquib;C. Vinckier;B. Bruggen
研究了在pH 3、7和9条件下，采用超滤（UF）、纳滤（NF）和反渗透（RO）3种压力驱动膜过滤方法对地表水中阿特拉津进行臭氧氧化降解的动力学，以确定给水水质对阿特拉津化学氧化的影响。首先，在天然有机物（NOM）的存在下，在地表水（未经膜预处理）中测定阿特拉津的衰减率。阿特拉津衰减率的增加，观察到在pH 3和7的地表水，这可以归因于NOM的存在下，因为它作为OH自由基促进剂。然而，在pH = 9时，NOM效应消失，因为在该高pH下，高级氧化过程（AOP）效应变得远远占主导地位。结合膜过滤技术与随后的臭氧化步骤去除阿特拉津从地表水的效率主要取决于pH值和NOM的分子量分数。
The kinetics of the decay rate of atrazine from surface water by ozonation was studied at pH 3, 7, and 9 without and with pretreatment with several pressure-driven membrane filtration methods: ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO), in order to determine the influence of the feedwater quality on the chemical oxidation of atrazine. First, the atrazine decay rate was determined in surface water (without pretreatment with membranes) in the presence of natural organic matter (NOM). An increase in the atrazine decay rate is observed at pH 3 and 7 in surface water, which can be attributed to the presence of NOM since it acts as OH radicals promoter. However, at pH = 9, the NOM effect vanishes since at this high pH, the advanced oxidation process (AOP) effect becomes far dominant. The efficiency of combining membrane filtration techniques with a subsequent ozonation step for removing atrazine from surface water mainly depends on the pH and the molecular weight fraction of the NOM. Un...