Mahmoodi Niyaz Mohammad, Arami Mokhtar
Department of Environmental Research, Institute for Colorants, Paint and Coatings, Tehran 1668814811, Iran.
J Photochem Photobiol B. 2009 Jan 9;94(1):20-4. doi: 10.1016/j.jphotobiol.2008.09.004. Epub 2008 Sep 17.
The feasibility and performance of photocatalytic degradation and toxicity reduction of textile dye (Acid Blue 25) have been studied at pilot scale in an immobilized titania nanoparticle photocatalytic reactor. UV-Vis, Ion Chromatography (IC) and chemical oxygen demand (COD) analyses were employed to obtain the details of the photocatalytic dye degradation. The effects of operational parameters such as H2O2, pH and dye concentration on the photocatalytic degradation of Acid Blue 25 were investigated. The aliphatic carboxylic acid intermediates and inorganic anions generated during the dye degradation process were analyzed. Daphnia magna bioassay has been used to test the progress of toxicity during the treatment process. Total disappearance of dye was attained. During the photocatalytic treatment process, the residual acute toxicity was reduced. The results showed that immobilized titania nanophotocatalysis capable to degradation and toxicity reduction of acid dye textile wastewater.
在一个固定化二氧化钛纳米颗粒光催化反应器中，以中试规模研究了纺织染料（酸性蓝25）的光催化降解及毒性降低的可行性和性能。采用紫外可见光谱、离子色谱（IC）和化学需氧量（COD）分析来获取光催化染料降解的详细信息。研究了诸如过氧化氢、pH值和染料浓度等操作参数对酸性蓝25光催化降解的影响。分析了染料降解过程中产生的脂肪族羧酸中间体和无机阴离子。使用大型溞生物测定法来测试处理过程中毒性的变化情况。染料完全消失。在光催化处理过程中，残留的急性毒性降低。结果表明，固定化二氧化钛纳米光催化能够降解酸性染料纺织废水并降低其毒性。
