Development of Activated Carbon from Pineapple Crown Wastes and Its Potential Use for Removal of Methylene Blue

ABSTRACT

The use of agro-industrial residues to produce biomass-based activated carbon to remove methylene blue may be one of the most promising alternatives to solve industrial wastewater problems, as well as agro-industrial waste. This work purposes an alternative for the development of pineapple crown waste (PC) as activated carbon (ACPC) by chemical activation using NaOH and pyrolysis for the removal of methylene blue (MB). The material was characterized by CHNS-O, SEM, BET, XRD, FTIR, and TGA. For the non-linear study of the Langmuir, Freundlich, and Temkin isotherms, the parameter investigated was the initial concentration (10, 25, 50, 100, 250, and 500 mg.L⁻¹). Experimental results revealed the suitability of pineapple crown waste to be used as a precursor for activated carbon. According to the Langmuir non-linear model, ACPC presented a maximum adsorption capacity of 292 mg.g⁻¹. The good MB removal capacity by ACBP is due to pores structure. Pineapple crown waste can be used as an alternative cleaner for an ecologically adsorbent.

摘要

利用农用工业废渣生产生物质基活性炭去除亚甲基蓝, 是解决工业废水和农用工业废弃物的最有前景的替代方法之一. 以菠萝冠废料 (PC) 为原料, 采用NaOH化学活化, 热解去除亚甲基蓝 (MB) 的方法制备活性炭 (ACPC) . 用CHNS-O, SEM, BET, XRD, FTIR和TGA对材料进行了表征. 对于Langmuir, Freundlich和Temkin等温线的非线性研究, 所研究的参数是初始浓度 (10, 25, 50, 100, 250和500mg.L-1) . 实验结果表明, 菠萝冠废料作为活性炭前驱体的适宜性. 根据Langmuir非线性模型, ACPC的最大吸附容量为292mg.g-1. ACBP对MB的良好去除能力是由孔隙结构决定的. 菠萝冠废料可作为生态吸附剂的替代清洁剂.

关键词:

• 菠萝冠
• 活性炭
• 亚甲蓝
• 吸附
• 等正交项
• 大孔

KEYWORDS:

• Pineapple crown
• activated carbon
• methylene blue
• adsorption
• isortherms
• macroporous

Acknowledgments

Authors are grateful for the research support by FAPERJ (process E-26/010.001800/2015 and E-26/010.101232/2018).

Additional information

Funding

This work was supported by the Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro [Process E-26 /010.001800 / 2015 and E-26 / 010.101232 / 2018].