相关实验视频

Updated: Jul 1, 2025

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Published on: March 2, 2016

Ag⁺在球岩表面的吸附特性:一个综合实验和第一原则研究

Heng Yu¹, Hongliang Zhang¹, Chenyang Zhang^2,3

¹School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China.

Environmental science and pollution research international

|March 2, 2024

概括

天然球石有效地从工业废水中去除银离子 (Ag+). 这种矿物吸附剂具有很高的吸附能力,通过化学吸附形成硫化银 (Ag2S),为重金属污染提供了一种新的解决方案.

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:

工业发展产生大量的重金属废水,对生态系统和人类健康构成风险.
由于其半导体特性,天然球石具有环境修复应用的潜力.
从受污染的水源中有效地去除银离子 (Ag+) 是至关重要的.

研究的目的:

开发一种基于天然矿物质的吸附材料 (sphalerite) 来有效地从废水中去除Ag+.
研究Ag+对球石的吸附机制和动力学.
探索球石在处理重金属污染水中的潜力.

主要方法:

进行了批量吸附实验,以优化去除条件 (度,时间,剂量,颗粒大小,温度,pH).
用弗洛伊德利希等温和和伪二次运动模型分析了吸附数据.
用表面特征技术 (SEM-EDS,FTIR,XPS) 和密度函数理论 (DFT) 的计算来阐明吸附机制.

主要成果:

在最佳条件下,斯法莱里特在15分钟内有效地将Ag+度从50mg/L降低到0.094mg/L.
根据弗洛伊德利希和伪二阶模型,最大吸附能力达到19.77 mg/g.
SEM-EDS,FTIR,XPS和DFT证实了Ag+对球石的化学吸附,通过Ag+和S2之间的电荷转移形成Ag2S.

结论:

天然球石是一种高效的吸附剂,可以从废水中去除Ag+.
吸附过程主要是由化学相互作用驱动的,在矿物表面形成硫化银 (Ag2S).
这项研究提供了对球石上的Ag+吸附机制的系统理解,为重金属废水处理开辟了道路.

关键词:

吸附方式吸附方式吸附方式在 DFT 方面,它是最重要的.银银银银银银银斯法利石是一种斯法利石.废水是废水,废水就是废水.

更多相关视频

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

Experimental Study of the Relationship Between Particle Size and Methane Sorption Capacity in Shale

Experimental Study of the Relationship Between Particle Size and Methane Sorption Capacity in Shale

Published on: August 2, 2018

相关概念视频

Precipitation of Ions

Precipitation of Ions

Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:

Ionic Crystal Structures

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...

Chemical Reactions in Aqueous Solutions

Chemical Reactions in Aqueous Solutions

Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.

Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...