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Implementation of martite nanoparticles prepared through planetary ball milling as a heterogeneous activator of oxone for degradation of tetracycline antibiotic: Ultrasound and peroxy-enhancement
Chemosphere ( IF 8.8 ) Pub Date : 2018-07-17 , DOI: 10.1016/j.chemosphere.2018.07.077
Reza Darvishi Cheshmeh Soltani , Masumeh Mashayekhi , Sahand Jorfi , Alireza Khataee , Mohammad-Javad Ghanadzadeh , Mika Sillanpää

The aim of the present study was to employ martite nanoparticles synthesized through planetary ball milling instead of conventional sources of iron for the activation of Oxone in order to decompose tetracycline (TC) antibiotic in the aquatic phase. Accordingly, martite nanoparticles-activated Oxone exhibited a remarkable improvement in degrading TC molecules up to 87%. The results indicated an increased decomposition rate of TC with increasing Oxone concentration, martite nanoparticles dosage, and initial pH. In the absence of ultrasound, the decomposition rate of TC was 0.0481 min−1 within 30 min, while the implementation of ultrasound at 320 W and addition of hydrogen peroxide at 40 mM led to increase in the decomposition rate up to 0.0770 and 0.0907 min−1, respectively. The presence of carbonate and even persulfate ions suppressed the decomposition rate. Inversely, the addition of chloride and carbon tetrachloride enhanced the reactor performance in terms of TC degradation. Within four consecutive experimental runs, only 10.8% was dropped in the decomposition rate, indicating the appropriate reusability potential of martite nanoparticles. The results confirmed the appropriate ability of the treatment process in degrading and mineralizing the target pollutant but a longer exposure time is required for an efficient mineralization.



中文翻译:

通过行星式球磨制备的马氏体纳米颗粒作为异质酮的四环素抗生素降解活化剂的实施:超声和过氧增强

本研究的目的是使用通过行星球磨合成的马氏体纳米颗粒代替传统的铁源来活化Oxone,以在水相中分解四环素(TC)抗生素。因此,马氏体纳米颗粒活化的Oxone在将TC分子降解高达87%方面显示出显着的改善。结果表明,TC的分解速率随Oxone浓度,martite纳米颗粒剂量和初始pH值的增加而增加。在没有超声的,TC的分解率为0.0481分钟-1在30分钟内,而在为320W超声和添加过氧化氢,在40毫米的实施导致在分解率达到增加至0.0770和0.0907分钟- 1个, 分别。碳酸盐甚至过硫酸根离子的存在抑制了分解速率。相反,就TC降解而言,氯化物和四氯化碳的加入增强了反应器的性能。在四个连续的实验运行中,分解速率仅下降了10.8%,这说明了martite纳米粒子具有适当的可重用性。结果证实了该处理过程具有降解和矿化目标污染物的适当能力,但是有效矿化需要更长的暴露时间。

更新日期:2018-07-18
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