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Degradation of Acid Red 73 by Activated Persulfate in a Heat/Fe3O4@AC System with Ultrasound Intensification.
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-01 , DOI: 10.1021/acsomega.0c00903 Liyan Liu 1 , Chao Yang 1 , Wei Tan 1 , Yang Wang 1, 2
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-01 , DOI: 10.1021/acsomega.0c00903 Liyan Liu 1 , Chao Yang 1 , Wei Tan 1 , Yang Wang 1, 2
Affiliation
This work aimed to investigate the degradation efficiency of waste water with an azo dye, Acid Red 73 (AR73), by persulfate/heat/Fe3O4@AC/ultrasound (US). The introduction of ultrasound into the persulfate/heat/Fe3O4@AC system greatly enhanced the reaction rate because of the physical and chemical effects induced by cavitation. Various parameters such as temperature, initial pH, sodium persulfate dosage, catalyst dosage, initial concentration of AR73, ultrasonic frequency and power, and free-radical quenching agents were investigated. The optimal conditions were determined to be AR73 50 mg/L, PS 7.5 mmol/L, catalyst dosage 2 g/L, ultrasound frequency 80 kHz, acoustic density 5.4 W/L, temperature 50 °C, and pH not adjusted. Nearly, 100% decolorization was achieved within 10 min under optimal conditions. Different from some other similar research studies, the reaction did not follow a radical-dominating way but rather had 1O2 as the main reactive species. The recycling and reusability test confirmed the superiority of the prepared Fe3O4@AC catalyst. The research achieved a rapid decolorization method not only using waste heat of textile water as a persulfate activator but also applicable to a complex environment where common radical scavengers such as ethanol exist.
中文翻译:
超声强化加热/ Fe3O4 @ AC系统中活化过硫酸盐降解酸性红73的研究。
这项工作旨在研究过硫酸盐/热/ Fe 3 O 4 @ AC /超声波(美国)对偶氮染料酸性红73(AR73)对废水的降解效率。将超声波引入过硫酸盐/热/ Fe 3 O 4中由于空化引起的物理和化学作用,@ AC系统大大提高了反应速率。研究了各种参数,例如温度,初始pH,过硫酸钠用量,催化剂用量,AR73的初始浓度,超声频率和功率以及自由基猝灭剂。确定最佳条件为:AR73 50 mg / L,PS 7.5 mmol / L,催化剂用量2 g / L,超声频率80 kHz,声密度5.4 W / L,温度50°C,pH未调节。在最佳条件下,在10分钟内几乎实现了100%的脱色。与其他类似研究不同,该反应不是遵循自由基主导的方式,而是具有1 O 2作为主要的反应物种。再循环和可重复使用性测试证实了所制备的Fe 3 O 4 @AC催化剂的优越性。该研究不仅实现了一种快速脱色的方法,该方法不仅利用纺织废水的余热作为过硫酸盐活化剂,而且还适用于存在常见自由基清除剂(例如乙醇)的复杂环境。
更新日期:2020-06-01
中文翻译:
超声强化加热/ Fe3O4 @ AC系统中活化过硫酸盐降解酸性红73的研究。
这项工作旨在研究过硫酸盐/热/ Fe 3 O 4 @ AC /超声波(美国)对偶氮染料酸性红73(AR73)对废水的降解效率。将超声波引入过硫酸盐/热/ Fe 3 O 4中由于空化引起的物理和化学作用,@ AC系统大大提高了反应速率。研究了各种参数,例如温度,初始pH,过硫酸钠用量,催化剂用量,AR73的初始浓度,超声频率和功率以及自由基猝灭剂。确定最佳条件为:AR73 50 mg / L,PS 7.5 mmol / L,催化剂用量2 g / L,超声频率80 kHz,声密度5.4 W / L,温度50°C,pH未调节。在最佳条件下,在10分钟内几乎实现了100%的脱色。与其他类似研究不同,该反应不是遵循自由基主导的方式,而是具有1 O 2作为主要的反应物种。再循环和可重复使用性测试证实了所制备的Fe 3 O 4 @AC催化剂的优越性。该研究不仅实现了一种快速脱色的方法,该方法不仅利用纺织废水的余热作为过硫酸盐活化剂,而且还适用于存在常见自由基清除剂(例如乙醇)的复杂环境。