Detoxification of waste water contaminated with imidacloprid using homogeneous and heterogeneous photo-Fenton processes.
Detoxification of waste water contaminated with imidacloprid using homogeneous and heterogeneous photo-Fenton processes.
复制标题
使用同质和异质光芬顿过程对受吡虫啉污染的废水进行解毒。
DOI：
10.2166/wpt.2009.010
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发表时间：
2009
影响因子：
1.6
通讯作者：
P. González
中科院分区：
文献类型：
--
作者：
C. Zaror;C. Segura;H. Mansilla;M. Mondaca;P. González
本文介绍了均相和非均相光fenton法去除废水中吡虫啉的实验结果。实验在2l光反应器中进行，初始浓度范围为10 - 40 mg L -1 Fe（II）和100 - 450 mg L -1 h2o2；30 - 150分钟的处理时间。初始h2o2浓度决定了氧化过程的程度，而铁浓度在过程动力学中起关键作用。均相光fenton显示出快速的初始反应，在不到1分钟的处理后，吡虫啉的降解率达到50%，随后的过程更慢，直到完全去除。铁（II）快速氧化为铁（III）似乎是最初去除吡虫啉的原因。TOC和COD去除率分别高达77%和88%。使用共丙烯酸聚丙烯酰胺树脂作为固体载体的非均相光Fenton呈现出与均相应用相似的趋势，尽管整个过程的进行速度较慢。未处理的吡虫啉对水蚤有明显的急性毒性，对枯草芽孢杆菌有明显的遗传毒性。即使在完全去除农药后，急性毒性和遗传毒性仍可检测到，这表明存在有毒副产物。
This paper presents experimental results on the removal of Imidacloprid from waste water using homogeneous and heterogeneous photo-Fenton processes. Experiments were conducted in a 2 L photo reactor, initial concentrations in the range 10 - 40 mg L -1 Fe(II) and 100 - 450 mg L -1 H 2 O 2 ; 30 - 150 min processing times. Initial H 2 O 2 concentration determined the extent of the oxidation process, whereas iron concentration played a key role in the process kinetics. Homogeneous photo-Fenton showed a fast initial reaction leading to 50% Imidacloprid degradation after less than 1 min treatment, followed by a slower process until full removal was achieved. Rapid Fe(II) oxidation to Fe(III) seems responsible for the initial Imidacloprid removal. TOC and COD removal up to 77% and 88%, respectively, were measured. Heterogeneous photo Fenton, using co-acrylic acid polyacrylamide resin as a solid support, presented similar trends than homogeneous applications, although the overall process proceeded at a slower rate. Untreated Imidacloprid samples showed significant acute toxicity to Daphnia magna and genotoxic effects on Bacillus subtilis . Acute toxicity and genotoxicity remained detectable even after complete pesticide removal, showing that toxic by-products were present.