Yin Chang, Zhang Yongbo, Tao Yongjiang, Zhu Xueping
Taiyuan University of Technology, Taiyuan, 030024, China.
Sci Rep. 2024 Oct 9;14(1):23561. doi: 10.1038/s41598-024-74240-8.
Acid mine water (AMD) can cause significant environmental hazards due to its high concentration of metal ions, so the development of effective treatment methods is essential to mitigate its impact. In this study, adsorption experiments were conducted using limestone (LS) and activated carbon (AC) to explore the adsorption efficiency for different concentrations of metal ions. Adsorption was evaluated by static and competitive batch tests. The adsorbent mechanism was investigated using analytical techniques such as SEM, FTIR and XRD. The efficacy of LS and AC for competitive adsorption of Fe, Mn, Zn and Cu ions from AMD was evaluated. The study analyzed the effect of environmental conditions such as initial concentration and ionic strength on the adsorption efficiency. The results showed that LS showed high adsorption capacity for Fe and Cu, but was less effective in competitive adsorption of Mn. AC showed superior adsorption performance for Fe and Cu under competitive conditions due to its high surface area and functional groups. Both adsorbents showed selective efficacy influenced by the physicochemical properties of metal ions. This study helps to guide the optimization of adsorbents in AMD treatment and highlights the importance of selecting suitable materials based on specific metal ion properties.
酸性矿山废水（AMD）因其高浓度的金属离子会造成重大环境危害，因此开发有效的处理方法对于减轻其影响至关重要。在本研究中，使用石灰石（LS）和活性炭（AC）进行吸附实验，以探索对不同浓度金属离子的吸附效率。通过静态和竞争性批量试验评估吸附情况。使用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）等分析技术研究吸附剂机理。评估了LS和AC对AMD中Fe、Mn、Zn和Cu离子的竞争性吸附效果。该研究分析了初始浓度和离子强度等环境条件对吸附效率的影响。结果表明，LS对Fe和Cu表现出高吸附容量，但在竞争性吸附Mn方面效果较差。由于其高比表面积和官能团，AC在竞争性条件下对Fe和Cu表现出优异的吸附性能。两种吸附剂均表现出受金属离子物理化学性质影响的选择性效果。本研究有助于指导AMD处理中吸附剂的优化，并突出了根据特定金属离子性质选择合适材料的重要性。
