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2,4-二基酸在来自麦卡达米亚坚果外的活性炭上吸附

S Harabi¹, S Guiza¹, A Álvarez-Montero²

¹University of Gabes, National Engineering School of Gabes, Laboratory of Applied Thermodynamic, LR18ES33, 6029, Gabes, Tunisia.

Environmental research

|January 24, 2024

概括

马卡达米亚坚果外中的活性炭有效地从水中去除杀虫剂2,4-二二酸. 这些新型吸附剂显示出高容量和适用于净水应用的适用性.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
吸附科学吸附科学

背景情况:

水源的农药污染对环境和健康构成重大风险.
有效和可持续的方法去除污染物,如2,4-二基酸至关重要.

研究的目的:

调查使用来自麦卡达米亚坚果外的活性炭从水溶液中吸附2,4-二基酸.
探索不同活性剂对活性碳的特性及其吸附性能的影响.

主要方法:

使用麦卡达米亚坚果外和各种活性剂 (FeCl3,ZnCl2,KOH,H3PO4) 合成活性炭.
活性炭通过N2吸附-脱附,元素分析,热重力测量分析 (TG) 和零电荷点 (pHpzc) 进行表征.
在不同温度 (25,45,65°C) 的批量吸附实验中研究动力学,平衡和热力学,然后进行突破曲线分析.

主要成果:

活性炭表现出不同的多孔纹理和表面特性,取决于活性剂.
吸附动力学最好用FeCl3,H3PO4和KOH活性碳的伪二阶模型和ZnCl2活性碳的伪一阶模型来描述.
具有较高的吸附能力 (约. 600 mg g-1) 用KOH和ZnCl2活性炭实现,平衡数据符合Langmuir和Toth模型.
热力学分析表明一种自发的,内热吸附过程,随机性增加.

结论:

基于麦卡达米亚坚果外的活性炭是用于去除2,4-二二酸的有希望的吸附剂.
活性剂的选择显著影响吸附性质和吸附性能.
这项研究表明,废物回收利用的可持续方法是为了环境修复.

关键词:

2,4-二基酸二基酸 2,4-二基酸二酸活性炭是一种活性炭.吸附方式吸附方式吸附方式化学激活是一种化学激活.异热体 (isotherms) 是一种热体.运动学运动学

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