Environmental Research ( IF 8.3 ) Pub Date : 2020-03-12 , DOI: 10.1016/j.envres.2020.109367 Ghorban Asgari 1 , Amir Shabanloo 1 , Mehdi Salari 2 , Fatemeh Eslami 3
The present study investigates the synergistic performance of the sonophotolytic-activated ZnO/persulfate (US/UV/ZnO/PS) process in the decolorization of acid blue 113 (AB113) dye from aqueous solution and its feasibility for the treatment of real textile wastewater. Decolorization of AB113 solution was modeled by central composite design-response surface methodology (CCD-RSM) and artificial neural network (ANN) approaches and optimized by CCD-RSM and genetic algorithm (GA) approaches. Statistical metrics indicated that both CCD-RSM and ANN approaches seemed satisfactory. However, the results of statistical fit measures indicated a relative superiority of CCD-RSM as compared to the ANN approach. The results of optimization of the process parameters by CCD-RSM and GA approaches appeared to be similar as follows: pH = 6.1, reaction time = 25 min, US power density = 300 W/L, ZnO = 0.88 g/L and PS = 2.43 mmol/L. The synergistic effect of the hybrid US/UV/ZnO/PS process in comparison with its individual processes (US, UV, ZnO, and PS) was found to be 54.3%. Quenching experiments discovered that 
are the main oxidizing radicals in a mildly acidic condition of the reaction solution. The removal efficiency of AB113 in the presence of some anions decreased in the order of bicarbonate > sulfate > phosphate > nitrate > chloride. Further, the reusability feasibility of ZnO showed that the ZnO material retained its photocatalytic property after five successive cycles of reusability test, while Zn2+ ion concentration in the reaction solution was measured to be 2.81 mg/L. The findings also indicated that the integrated process application suppresses extremely chemical and electrical costs. The study of the feasibility of the US/UV/ZnO/PS process in the treatment of real textile wastewater was done by determining COD, TOC and BOD5/COD ratio. Results demonstrated that the 96.6 and 97.1% reduction of COD and TOC was achieved after 5 and 7 h reaction time, respectively. The obtained BOD5/COD ratio changed from about 0.15 (for non-treated wastewater) to about 0.61 with increasing reaction time from zero to 90 min. In conclusion, the hybrid US/UV/ZnO/PS system can be proposed as a novel and promising approach to be utilized as a pretreatment technique before a biological treatment process to facilitate the biological treatment of recalcitrant textile wastewater.
中文翻译：
ZnO /过硫酸盐声光催化处理AB113染料和真纺织品废水：通过响应面法和人工神经网络建模。
本研究研究了超声光解活化的ZnO /过硫酸盐（US / UV / ZnO / PS）工艺在水溶液中酸性蓝113（AB113）染料脱色方面的协同性能及其在处理真实纺织废水中的可行性。AB113溶液的脱色采用中央复合设计响应曲面方法（CCD-RSM）和人工神经网络（ANN）方法进行建模，并采用CCD-RSM和遗传算法（GA）方法进行优化。统计指标表明，CCD-RSM和ANN方法都令人满意。但是，统计拟合的结果表明，与ANN方法相比，CCD-RSM具有相对优势。通过CCD-RSM和GA方法对工艺参数进行优化的结果似乎相似：pH = 6.1，反应时间= 25分钟，US功率密度= 300 W / L，ZnO = 0.88 g / L，PS = 2.43 mmol / L。发现US / UV / ZnO / PS混合工艺与其单个工艺（US，UV，ZnO和PS）的协同效应为54.3％。淬火实验发现
京公网安备 11010802027423号