Competitive adsorption behavior and adsorption mechanism of limestone and activated carbon in polymetallic acid mine water treatment

吸附 机制(生物学) 活性炭 化学 化学工程 碳纤维 环境化学 材料科学 有机化学 复合材料 工程类 哲学 认识论 复合数
作者
Chang Yin,Yongbo Zhang,Y. Tao,Xueping Zhu
出处
期刊:Scientific Reports [Springer Nature]
卷期号:14 (1)
标识
DOI:10.1038/s41598-024-74240-8
摘要

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.

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