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基于FeO-N-香蕉皮生物质炭对亚甲基蓝的高吸附性能。

High adsorption to methylene blue based on FeO-N-banana-peel biomass charcoal.

作者信息

Gong Zhu-Xiang, Steven Mfitumucunguzi, Chen Yan-Ting, Huo Li-Zhu, Xu Hao, Guo Chao-Fei, Yang Xue-Juan, Wang Yu-Xuan, Luo Xi-Ping

机构信息

College of Chemistry and Materials Engineering, Zhejiang A&F University Hangzhou 311300 China

Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass Hangzhou 311300 China.

出版信息

RSC Adv. 2024 Aug 15;14(35):25619-25628. doi: 10.1039/d4ra04973j. eCollection 2024 Aug 12.

DOI:10.1039/d4ra04973j
PMID:39148761
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11325343/
Abstract

This research focused on utilizing banana peel as the primary material for producing mesoporous biomass charcoal through one-step potassium hydroxide activation. Subsequently, the biomass charcoal underwent high-temperature calcination with varying impregnation ratios of KOH : BC for different durations in tubular furnaces set at different temperatures. The resultant biomass charcoal was then subjected to hydrothermal treatment with FeCl·6HO to produce biochar/iron oxide composites. The adsorption capabilities of these composites towards methylene blue (MB) were examined under various conditions, including pH (ranging from 3 to 12), temperature variations, and initial MB concentrations (ranging from 50 to 400 mg L). The adsorption behavior aligned with the Langmuir model and demonstrated quasi-secondary kinetics. After five adsorption cycles, the capacity decreased from 618.64 mg g to 497.18 mg g, indicating considerable stability. Notably, FeO-N-BC exhibited exceptional MB adsorption performance.

摘要

本研究聚焦于利用香蕉皮作为主要原料，通过一步氢氧化钾活化法制备介孔生物质炭。随后，生物质炭在不同温度的管式炉中，以不同的KOH : BC浸渍比进行不同时长的高温煅烧。接着，将所得的生物质炭用FeCl·6HO进行水热处理，以制备生物炭/氧化铁复合材料。在包括pH值（3至12）、温度变化和初始亚甲基蓝（MB）浓度（50至400 mg L）等各种条件下，考察了这些复合材料对亚甲基蓝（MB）的吸附能力。吸附行为符合朗缪尔模型，并表现为准二级动力学。经过五个吸附循环后，吸附容量从618.64 mg g降至497.18 mg g，表明具有相当的稳定性。值得注意 的是，FeO-N-BC表现出优异的亚甲基蓝吸附性能。

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