异种取代的甘包作为一种有效的生物吸收剂,用于化染料
Megg Madonyk Cota Elias Carvalho1, Liliane Catone Soares1, Oscar Fernando Herrera Adarme2
1Physical Organic Chemistry Group, Department of Chemistry, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Rua Quatro, 786, Bauxita, Ouro Preto 35402-136, MG, Brazil.
Molecules (Basel, Switzerland)
|August 14, 2025
概括
异种取代的甘包油 (HDSB) 能够有效地从水中去除阳离子染料auramine-O和safranin-T. 这种可重复使用的吸附剂表现出强烈的,由度驱动的吸附,有可能用于废水处理应用.
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:
- 工业废水往往含有有毒的阴离子染料,需要有效的去除方法.
- 甘包油是一种丰富的纤维素生物质,具有功能化潜力.
- 化学修饰可以增强生物质衍生材料的吸附性能.
研究的目的:
- 为了准备和表征异种取代的甘包 (HDSB),用于去除染料.
- 为了研究HDSB的吸附性能,对阳离子染料auramine-O (AO) 和safranin-T (ST) 的吸附性能.
- 为了阐明HDSB的吸附机制和可重复使用性.
主要方法:
- 同时对甘包油与酸盐和酸盐无水化物进行单化学修饰,以产生HDSB.
- 批量吸附实验研究HDSB剂量,pH,接触时间和初始染料度的影响.
- 异热定位热度计 (ITC) 和分子动力学 (MD) 模拟以了解吸附热力学和相互作用.
主要成果:
- 在pH 7.0下,HDSB对AO (1.37 mmol g-1) 和ST (0.93 mmol g-1) 具有很高的吸附能力.
- 在二进制系统中,ST吸附对AO吸附产生了对抗作用,表明有偏好的结合.
- 吸附是自发的,运动的,和热驱动 (ΔadsH° ≈ -22 到 -23 kJ mol-1),由ITC证实.
- 在多个吸附-脱附周期中,HDSB表现出良好的可重复使用性.
结论:
- HDSB是一种高效且可重复使用的吸附剂,用于从水溶液中去除阴离子染料.
- 吸附过程在热力学上是有利的,并由力驱动.
- 模拟MD提供了对染料和HDSB表面之间的分子相互作用的见解.
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