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Utilization of Tires Waste-Derived Magnetic-Activated Carbon for the Removal of Hexavalent Chromium from Wastewater

机译:利用轮胎废料衍生的磁性活性炭从废水中除去六价铬

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摘要

The present study focuses on fabrication of magnetic activated carbon (M-AC) using tire waste and its potential investigation for adsorption of Cr (VI) from wastewater. The composite material (M-AC) was synthesized by pyrolysis followed by in situ magnetization method, and characterized by FTIR, FESEM, EDX, and XRD analysis. The maximum adsorption of Cr (VI) ion over composite adsorbent was found (~99.5%) to occur at pH 2, sample volume 10 mL, adsorbent dose 100 mg, contact time 30 min. The adsorption process was endothermic, feasible, spontaneous, and was found to follow pseudo second order of the reaction. The Cr ion could be completely desorbed (~99.3%) from the composite adsorbent by using 20 mL of 2 M NaOH solution. The composite adsorbent was regenerated by continuous adsorption and desorption for 5 consecutive cycles by using 10 mL 0.1 M HCl solution. M-AC also performed well in case of tannery wastewater by removing about 97% of Cr (VI).
机译:本研究专注于使用轮胎废物制造磁性活性炭(M-AC)及其对废水中Cr(VI)的潜在研究。通过热解合成复合材料(M-AC),然后以原位磁化法合成,并通过FTIR,FESEM,EDX和XRD分析表征。发现Cr(vi)离子对复合吸附剂的最大吸附(〜99.5%)在pH 2,样品体积10ml,吸附剂剂量100mg,接触时间30分钟。吸附过程是吸热的,可行的,自发性的,发现遵循反应的伪二阶。通过使用20mL 2M NaOH溶液,Cr离子可以从复合吸附剂中完全解吸(〜99.3%)。通过使用10mL 0.1M HCl溶液,通过连续吸附和解吸再生复合吸附剂5连续循环。通过去除约97%的Cr(VI),在制革废水的情况下,M-AC也很好地进行。

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