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Synergetic degradation of reactive dye Acid Red 1 by cobalt-doped lignite fly ash

机译:钴掺杂褐煤粉煤灰协同降解活性染料酸性红1

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Degradation studies on a reactive dye Acid Red 1 are carried out by lignite fly ash (LFA) and cobalt-doped over LFA under UV-C radiation. In India, disposal of fly ash is a major problem. As fly ash is an inert material containing small quantities of photoreactive, inorganic oxides like TiO2, CaO and Fe2O3, this paper makes an effort to use it to overcome the degradation of dye and disposal of the fly ash problem. The chemical composition of LFA is analysed by X-ray fluorescence. Scanning electron microscopy with energy dispersive X-ray spectroscopy and X-ray diffraction are carried out to characterise the physical and photophysical properties of the catalyst. The optimum parameters affecting the dye degradation are found for LFA and cobalt-doped LFA under UV-C light. The kinetic coefficients for both catalysts are also determined. Cobalt-doped LFA proved the most effective, followed by LFA, and the corresponding efficiencies are 99 and 95%, respectively, at the end of 60 min. The reuse of cobalt-doped fly ash and fly ash are also tested, and it is found that the efficiency for the first reuse is 93 and 88%, respectively, at the end of 60 min.
机译:用褐煤粉煤灰(LFA)进行活性染料酸性红1的降解研究,并在UV-C辐射下在LFA上掺钴。在印度,粉煤灰的处理是一个主要问题。由于粉煤灰是一种惰性材料,其中包含少量的光反应性无机氧化物,例如TiO2,CaO和Fe2O3,因此,本文尝试使用它来克服染料的降解和粉煤灰的处理问题。通过X射线荧光分析LFA的化学组成。进行了具有能量色散X射线光谱学的扫描电子显微镜和X射线衍射,以表征催化剂的物理和光物理性质。发现了在UV-C光下LFA和钴掺杂的LFA的影响染料降解的最佳参数。还确定了两种催化剂的动力学系数。钴掺杂的LFA被证明是最有效的,其次是LFA,在60分钟结束时相应的效率分别为99%和95%。还测试了掺钴的粉煤灰和粉煤灰的再利用,发现在60分钟结束时,第一次再利用的效率分别为93%和88%。

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