聚环芳的竞争性吸附在尾 Modified 污泥生物炭上提供了机械洞察力
Anrong Liu1,2, Li-Juan Feng3, Yangyang Ou1,4
1School of Geography and Environmental Science, Guizhou Normal University, Guiyang, 550001, Guizhou, People's Republic of China.
Environmental geochemistry and health
|November 7, 2024
概括
这项研究表明,由污泥和尾矿制成的生物炭如何有效地吸附废水中的多环芳 (PAHs). 不同的PAH在吸附点上竞争,其中的机制包括孔隙填充和疏水相互作用.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- 多环芳 (PAH) 是废水中的持久污染物.
- 生物炭是一种有前途的吸收剂,可以去除PAHs.
- 了解不同PAH在生物炭上的竞争性吸附是至关重要的.
研究的目的:
- 为了研究污泥和尾矿的联合热解,用于生产生物炭.
- 评估由此产生的生物炭的吸附性能,以测定具有不同环数的PAHs (,,[a]).
- 阐明竞争性吸附机制和影响因素.
主要方法:
- 生物炭通过污泥和尾矿的联合热解在300,500和800°C时合成.
- 进行了批量吸附实验,以确定吸附能力和机制.
- 使用表面特征技术 (例如BET) 来分析生物炭的特性.
主要成果:
- 尾增强了生物炭特性,如BET表面积,微孔体积,疏水性和芳香性.
- 观察到的最大吸附能力为:菲南的29.90μmol/g,的25.58μmol/g和的20.45μmol/g.
- 烯和烯在C=O和C-O-C位点上竞争,而烯主要使用C-OH和C=C位点,在C=C位点上表现出更强烈的竞争.
结论:
- 从污泥和尾矿生产的生物炭对PAH去除有效.
- 吸附机制包括孔隙填充,疏水相互作用和π-π相互作用.
- 竞争性吸附动态在PAH之间因其在生物炭上的结构和功能组而有所不同.
更多相关视频
08:21Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
Published on: May 18, 2018
14.5K
10:44Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
Published on: February 12, 2019
9.9K
相关概念视频
01:28Adsorption of Gases on Solids
Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...
01:26Microbial Bioremediation of Hydrocarbons
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...