Enhanced coagulation-photocatalytic treatment of Acid red 73 dye and real textile wastewater using UVA/synthesized MgO nanoparticles
Enhanced coagulation-photocatalytic treatment of Acid red 73 dye and real textile wastewater using UVA/synthesized MgO nanoparticles
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DOI：
10.1016/j.jenvman.2016.04.005
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发表时间：
2016-07-15
影响因子：
8.7
通讯作者：
Abtahi, Mehrnoosh
中科院分区：
文献类型：
--
作者：
Jorfi, Sahand;Barzegar, Gelavizh;Abtahi, Mehrnoosh
研究了UVA/MgO纳米粒子序贯混凝-光催化降解工艺对酸性红73染料的去除效果，并对真实的纺织废水进行了处理。以模拟废水为研究对象，考察了pH值、混凝剂投加量、光催化剂投加量等工艺参数对处理效果的影响，并将该工艺应用于真实的废水。混凝和光催化过程都依赖于pH值。当混凝剂投加量为200 mg/L，初始pH为6时，染料浓度从200 mg/L降至31 mg/L。当MgO纳米颗粒浓度为0.8 g/L、初始pH为5、反应时间为60 min时，AR 73的去除效果最好。去除结果与Langmuir-Hinshelwood模型拟合良好（R-2：0.939-0.988）。在真实的纺织废水的情况下，顺序混凝-UVA/MgO纳米颗粒光催化降解产生相当大的总COD和TOC去除率分别为98.3%和86.9%，300 min后。（C）2016 Elsevier Ltd.版权所有。
Sequencing coagulation - photocatalytic degradation using UVA/MgO nanoparticles process was investigated for Acid red 73dye removal and then treatment of a real textile wastewater. Effective operational parameters including pH and coagulant and photocatalyst dosage were studied in synthetic wastewater and then the process was applied for real wastewater. Both coagulation and photocatalytic processes were pH dependent. At coagulant dosage of 200 mg/L and initial pH of 6, the dye concentration decreased from 200 to 31 mg/L. Complete removal of AR73 was observed with MgO nanoparticles of 0.8 g/L, initial pH of 5 and reaction time of 60 min. Langmuir-Hinshelwood model was well fitted with removal results (R-2: 0.939-0.988 for different initial dye concentration). In the case of real textile wastewater, the sequence coagulation-UVA/MgO nanoparticles photocatalytic degradation yielded considerable total COD and TOC removal 98.3% and 86.9%respectively, after 300 min. (C) 2016 Elsevier Ltd. All rights reserved.