木质纤维素生物质稻草对饮用水中铝离子的有效生物吸附。

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
ACS Applied Electronic Materials Pub Date : 2024-05-01 Epub Date: 2023-12-14 DOI:10.1080/15226514.2023.2289588
Masoomeh Dakhem, Faezeh Ghanati, Mansour Afshar Mohammadian, Mohsen Sharifi
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引用次数: 0

摘要

饮用水中高浓度的铝(Al)是其主要摄入来源,可导致严重疾病。水稻秸秆(RS)作为木质纤维素生物质,具有从水环境中峰值吸收金属离子的巨大潜力,但尚未研究过用 RS 去除 Al3+ 的可行性。本研究旨在评估 RS 作为新型生物吸附剂去除饮用水中 Al3+ 的能力。研究人员通过多种生物和理化技术考察了 RS 的生物吸附特性。此外,还使用各种常见模型对等温线、动力学和热力学研究进行了评估。BET 曲线显示,在异质表面上存在纹理介孔,从而提高了生物吸附能力。扫描电子显微镜-电子显微镜分析(SEM-EDS)证实,通过物理机制,Al3+ 在外层表面形成了不规则的颗粒。生物测定和傅立叶变换红外光谱分析结果表明,木质素和果胶中的羧基和羟基是 Al3+ 的主要结合位点。批次实验结果表明,在生物吸附剂用量为 0.05 g/100 mL、接触时间为 50 分钟、pH 值为 7.5、温度为 30 ℃的条件下,Al3+ 的最大生物吸附容量为 283.09 mg/g,去除率为 94.86%。Freundlich 模型的匹配度最高,表明生物吸附过程为多层吸附过程。根据自由活化能的结果,生物吸附过程也是物理过程。热力学结果表明,生物吸附行为是自发和内热的。因此,结果表明 RS 是一种经济的生物吸附剂,可用于减少饮用水中的 Al3+。同时,它也可被视为管理稻田废弃物的最合适方法之一。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effective biosorption of Al ions from drinking water by lignocellulosic biomass rice straw.

High concentration of aluminum (Al) in drinking water is a major intake source of it and can result in serious diseases. Rice straw (RS) as lignocellulosic biomasses has great potential to peak up metal ions from aqueous environment, however, feasibility of Al3+ removal by RS has not been investigated yet. The present study aimed to evaluate the capacity of RS as a novel biosorbent for Al3+ from drinking water. Biosorption characteristics of RS were surveyed through several biological and physiochemical techniques. Additionally, isotherm, kinetic and thermodynamic studies were evaluated using various common models. BET profiles revealed the presence of textural mesoporosity on heterogeneous surface, which leading to improve the biosorption capacity. SEM-EDS analysis confirmed the morphological changes as irregularly particles of Al3+ on external surface via physical mechanism. The results of bioassays and FTIR analysis showed carboxylic and hydroxyl groups in lignin and pectin as the main Al3+ binding site. The batch experimental results showed the maximum biosorption capacity of 283.09 mg/g and removal efficiency of 94.86% for Al3+ at biosorbent dosage of 0.05 g/100 mL, contact time of 50 min, pH 7.5, and temperature of 30 °C. The Freundlich model has the best match and suggests the biosorption process as a multi-layer. According to the results of free activation energy, biosorption process was also physical. As thermodynamic result, the biosorption behavior was found spontaneous and endothermic. Consequently, results showed RS as an economical biosorbent for reducing Al3+ of drinking water. Meanwhile, it can be considered as one of the most appropriate methods for management of rice paddies waste.

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CiteScore
7.20
自引率
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