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从水溶液中吸附性去除和二烯,用氧功能化的多壁碳纳米管从米废物中提取:一项比较研究

Anh H Q Le¹, Hien Y Hoang², Thuan Le Van²

¹Faculty of General Sciences, Ho Chi Minh City University of Natural Resources and Environment, Ho Chi Minh City, 70000, Viet Nam.

|June 20, 2023

概括

这项研究从大米废物中合成了多壁碳纳米管 (MWCNT),用于污染控制. 与原始MWCNT和活性炭相比,功能化的MWCNT显示出和的吸附性优越.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
纳米技术纳米技术

背景情况:

可持续发展需要利用废物进行环境修复.
从大米废物中提取的活性炭被用作前体.
合成了多壁碳纳米管 (MWCNT) 和它们的氧化衍生物.

研究的目的:

从废物衍生的活性碳合成和表征MWCNT及其含氧功能的形式.
为了比较这些材料的吸附能力来去除和.
调查影响吸附的因素和潜在的机制.

主要方法:

合成MWCNT和氧化MWCNT (HNO3 / H2SO4,NaOCl,H2O2) 的过程.
使用FT-IR,BET,XRD,SEM,TEM,TGA,拉曼和表面电荷分析进行全面的表征.
和的吸附实验,使用兰格穆尔异温和伪二次动力学进行分析.

主要成果:

合成的MWCNT的外/内直径为40/20nm.
氧化NaOCl的MWCNT显示出最大的间隙;氧化HNO3/H2SO4的MWCNT具有最多的氧基.
吸附能力顺序:AC < MWCNT < HNO3/H2SO4-MWCNT < H2O2-MWCNT < NaOCl-MWCNT;多烯比更容易被吸附.

结论:

功能化程度和表面化学是MWCNT吸附的关键,与AC的多孔性不同.
来自大米皮废弃物的氧化MWCNT显示了芳香污染物去除的增强潜力.
吸附遵循兰格穆尔等温和和伪二阶动力学,表明化学吸附是显著的.

关键词:

活性炭是一种活性炭.吸附机制是一种吸附机制.多壁碳纳米管多壁碳纳米管.氧化功能化的功能化.大米皮皮皮挥发性有机化合物吸附吸附

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