Comparison Between the Performance of Activated Carbon and Graphene in Removal of Reactive Red 198

Q4 Environmental Science
M. Samarghandi, A. Poormohammadi, S. Shanesaz, K. Godini
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引用次数: 3

Abstract

The current study aimed at comparing the performances of activated carbon and graphene in the removal of reactive red 198. The experiments were conducted in a batch reactor and the effects of some operational parameters including initial dye concentration, pH, contact time, and different doses of activated carbon and graphene on the removal efficiency of dye were investigated. The results showed that the adsorption efficiency was affected by initial dye concentration. In general, with increasing contact time up to 180 minutes, the removal efficiency increased significantly. The removal efficiency of reactive red 198 increased with increasing contact time, and after 60 minutes of contact time, adsorption phase reached the equilibrium. When activated carbon was used, the maximum removal efficiency happened at pH 3. At this pH value, reactive red 198 was removed completely (100%) after 120 minutes, whereas the minimum efficiency was observed at pH 10. A similar trend was also observed for graphene as an adsorbent. Moreover, the removal efficiency of the dye by both adsorbents increased with the increase of the adsorbent dosage. The experimental data showed that the adsorption of reactive red198 on both active carbon and graphene fitted well into the second-order kinetic model. Active carbon and graphene fitted well Langmuir 1 model. According to the results, graphene acts as suitable adsorbent and can be applied in treating several industrial effluents and contaminated water in greater scales. The main upside of grapheme, in comparison with activated carbon, is that it reaches the equilibrium in a shorter time. Further, grapheme adsorbed the dye nearly completely (98% to 100%).
活性炭和石墨烯去除活性红198的性能比较
目前的研究旨在比较活性炭和石墨烯在去除活性红198方面的性能。实验在间歇式反应器中进行,研究了染料初始浓度、pH、接触时间以及不同剂量的活性炭和石墨烯等操作参数对染料去除效率的影响。结果表明,吸附效率受染料初始浓度的影响。一般来说,随着接触时间增加到180分钟,去除效率显著提高。活性红198的去除效率随着接触时间的增加而增加,接触60分钟后,吸附相达到平衡。当使用活性炭时,最大去除效率出现在pH值为3时。在该pH值下,反应性红198在120分钟后被完全去除(100%),而在pH 10下观察到最低效率。石墨烯作为吸附剂也观察到类似的趋势。此外,两种吸附剂对染料的去除效率都随着吸附剂用量的增加而提高。实验数据表明,活性red198在活性炭和石墨烯上的吸附符合二阶动力学模型。活性炭和石墨烯与Langmuir 1模型拟合良好。结果表明,石墨烯是一种合适的吸附剂,可用于更大规模的工业废水和污水处理。与活性炭相比,石墨烯的主要优点是它在更短的时间内达到平衡。此外,石墨烯几乎完全吸附了染料(98%至100%)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Avicenna Journal of Environmental Health Engineering
Avicenna Journal of Environmental Health Engineering Environmental Science-Health, Toxicology and Mutagenesis
CiteScore
1.00
自引率
0.00%
发文量
8
审稿时长
8 weeks
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