低成本大象粪便生物炭吸附亚甲基蓝的研究

Q3 Environmental Science Applied Environmental Research Pub Date : 2021-07-05 DOI:10.35762/aer.2021.43.3.3
Y. Suma, N. Pasukphun, N. Eaktasang
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引用次数: 4

摘要

采用350℃控制加热法制备的象粪生物炭(ED350)吸附水溶液中的亚甲基蓝(MB)。考察了吸附时间、pH、吸附剂投加量和MB初始浓度对吸附效果的影响。然后进一步分析动力学,等温线和热力学模型以确定吸附。结果表明,ED350在180 min内即可有效吸附MB,最佳吸附pH为11。发现Langmuir等温线模型最适合吸附平衡数据,ED350具有均匀的表面。计算得到的平衡参数(RL)值均大于零且小于1,表明吸附过程良好,ED350是一种高效的MB去除吸附剂。甲基溴在ED350上的吸附动力学服从准二阶模型。热力学数据表明,吸附过程是自发的、放热的。这一发现表明,ED350可能被证明是一种高效、低成本的废水中MB的吸附剂。
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Adsorption of Methylene Blue by Low-Cost Biochar Derived from Elephant Dung
Elephant dung biochar (ED350) prepared by controlled heating at 350 ºC was used to adsorb methylene blue (MB) in an aqueous solution. The effects of adsorption time, pH, adsorbent dosage, and initial MB concentration were examined. Kinetic, isotherm, and thermo-dynamic models were then further analyzed to determine the adsorption. The results show that ED350 was found to be efficient within 180 min. The optimum pH of MB adsorption was 11. The Langmuir isotherm model was found to be the most suitable fit for the adsorption equilibrium data, with ED350 having a homogeneous surface. The calculated equilibrium parameter (RL) values were greater than zero and less than one, indicating a favorable adsorption process and that ED350 was an efficient adsorbent for MB removal. The kinetics of MB adsorption onto ED350 obeys the pseudo-second-order model. The results of thermo-dynamic data consideration reveal that the adsorption process is spontaneous and exothermic in nature. This finding suggests that ED350 may prove to be an efficient low-cost adsorbent of MB from wastewater.
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来源期刊
Applied Environmental Research
Applied Environmental Research Environmental Science-Environmental Science (all)
CiteScore
2.00
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0.00%
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