Meriç Süreyya, Kaptan Deniz, Olmez Tuğba
Environmental Engineering Department, Civil Engineering Faculty, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey.
Chemosphere. 2004 Jan;54(3):435-41. doi: 10.1016/j.chemosphere.2003.08.010.
In this study, Reactive Black 5 (RB5) was removed from synthetic wastewater using Fenton's oxidation (FO) process. Experiments were conducted on the samples containing 100 and 200 mg l(-1) of RB5 to remove the dye toxicity. Seventy-five milligram per litre of RB5 caused 25% toxicity on 24-h born daphnids whereas 100 mg l(-1) of RB5 displayed 100% toxicity on Daphnia magna. The study was performed in a systematic approach searching optimum values of FeSO(4) and H(2)O(2) concentrations, pH and temperature. Optimum pH and temperature for 100 mg l(-1) of RB5 were observed as 3.0 and 40 degrees C, respectively, using 100 mg l(-1) of FeSO(4) and 400 mg l(-1) of H(2)O(2) resulted in 71% chemical oxygen demand (COD) and 99% color removal. For 200 mg l(-1) of RB5, 84% COD removal was obtained using 225 mg l(-1) of FeSO(4) and 1000 mg l(-1) of H(2)O(2) yielding 0.05 molar ratio at pH 3.0 and 40 degrees C. Color removal was also more than 99%. The optimum conditions determined in accordance with the literature data. The H(2)O(2) requirement seems to be related to initial COD of the sample. FeSO(4)/H(2)O(2) ratios found were not changed for both concentrations. The temperature affected the COD removal significantly at high degrees. Toxicity was completely removed for each concentration of RB5 at optimum removal conditions.
在本研究中，采用芬顿氧化（FO）工艺从合成废水中去除活性黑5（RB5）。对含有100和200 mg/L RB5的样品进行实验以去除染料毒性。每升75毫克的RB5对24小时龄的水蚤造成25%的毒性，而100 mg/L的RB5对大型溞显示出100%的毒性。该研究采用系统方法寻找硫酸亚铁（FeSO₄）和过氧化氢（H₂O₂）浓度、pH值和温度的最佳值。对于100 mg/L的RB5，观察到最佳pH值和温度分别为3.0和40℃，使用100 mg/L的FeSO₄和400 mg/L的H₂O₂可实现71%的化学需氧量（COD）去除和99%的脱色率。对于200 mg/L的RB5，在pH值为3.0和温度为40℃时，使用225 mg/L的FeSO₄和1000 mg/L的H₂O₂，COD去除率达到84%，脱色率也超过99%，此时摩尔比为0.05。根据文献数据确定了最佳条件。H₂O₂的需求量似乎与样品的初始COD有关。两种浓度下发现的FeSO₄/H₂O₂比值均未改变。温度在较高程度上对COD去除有显著影响。在最佳去除条件下，每种浓度的RB5毒性均被完全去除。
