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Real textile wastewater treatment by a sulfate radicals-Advanced Oxidation Process: Peroxydisulfate decomposition using copper oxide (CuO) supported onto activated carbon
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2020-09-14 , DOI: 10.1016/j.jwpe.2020.101623
Rahil Kiani , Fatemeh Mirzaei , Farshid Ghanbari , Rouzhan Feizi , Fayyaz Mehdipour

In this work, a simple method was used for the preparation of CuO@activated carbon (AC) composite for peroxydisulfate (PDS) activation to treat a real textile wastewater for the first time. The characteristics of the catalyst were determined by several methods. The performance of various processes was evaluated on total organic carbon (TOC) removal from the textile wastewater. Around 61 % of TOC was eliminated under the conditions of PDS = 7 mM, CuO@AC = 1 g/L, pH = 7 and 60 min reaction time. Other parameters were also studied indicating that 95 % of color, 72 % of COD (Chemical Oxygen Demand) and 70 % of BOD (Biochemical Oxygen Demand) were removed during treatment process. Kinetic studies showed that pseudo-first order was well fitted for color, COD, BOD and TOC removals with obtained rate constants of 0.054, 0.023, 0.021 and 0.018 min−1 respectively. The reusability and stability of CuO@AC catalyst were tested; the results demonstrated that three cycles of catalyst use were acceptable and copper leaching was negligible. Acute toxicity of raw and treated wastewater was also evaluated by Daphnia magna. According to acute toxicity results, PDS/CuO@AC process removed the toxicity of textile wastewater significantly. As a conclusion, PDS/CuO@AC process can be applied for real wastewater treatment and detoxification. This process can be an alternative oxidation process for the degradation of organic pollutants.



中文翻译:

通过硫酸根处理真实的纺织品废水-高级氧化工艺:使用负载在活性炭上的氧化铜(CuO)分解过氧化二硫酸

在这项工作中,采用了一种简单的方法来制备用于过氧二硫酸盐(PDS)活化的CuO活性炭(AC)复合材料,以首次处理真实的纺织品废水。催化剂的特性通过几种方法确定。对从纺织废水中去除总有机碳(TOC)的各种过程的性能进行了评估。在PDS = 7 mM,CuO @ AC = 1 g / L,pH = 7和60分钟反应时间的条件下,消除了约61%的TOC。还研究了其他参数,表明在处理过程中去除了95%的颜色,72%的COD(化学需氧量)和70%的BOD(生化需氧量)。动力学研究表明,伪一阶很好地适合了颜色,COD,BOD和TOC的去除,获得的速率常数为0.054、0.023、0.021和0.018分钟-1。测试了CuO @ AC催化剂的可重复使用性和稳定性;结果表明,使用催化剂的三个循环是可以接受的,而铜的浸出则可以忽略不计。大蚤(Daphnia magna)还评价了原水和处理后废水的急性毒性。根据急性毒性结果,PDS / CuO @ AC工艺可显着去除纺织品废水的毒性。结论是,PDS / CuO @ AC工艺可用于实际废水处理和排毒。该过程可以是用于降解有机污染物的另一种氧化过程。

更新日期:2020-09-14
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