Application of apophyllite and thomsonite natural zeolite as modified adsorbents for the removal of zinc from acid mine drainage

沸石 吸附 弗伦德利希方程 吸附 朗缪尔 化学 吸附剂 核化学 傅里叶变换红外光谱 离子交换 化学工程 有机化学 离子 催化作用 工程类
作者
Ravindra Gaikwad,Amol Vijay Sonawane,Vikas S. Hakke,Shirish H. Sonawane,Mahendra S. Gaikwad,Sandeep Kumar Lakhera,Venu Babu G,A.R. Warade,Ajay B. Urgunde,Vilas S. Sapkal
出处
期刊:Chemosphere [Elsevier BV]
卷期号:350: 141095-141095 被引量:6
标识
DOI:10.1016/j.chemosphere.2023.141095
摘要

Materials composed of natural zeolite have the potential to serve as highly effective adsorbents in the treatment of wastewater. The present study explores zeolite resin-based Apophyllite and Thomsonite as adsorbents for removing Zinc from acid mine drainage solution. The characteristics of the natural zeolites (Apophyllites and Thomsonite) are investigated using X-ray diffraction, Fourier-transform infrared spectroscopy and Field emission scanning electron microscopy analysis. The removal of Zinc from AMD is explored, and the influence of metal ion concentration, resin dose, and pH is investigated using a batch exchange resin-based experimental method. Maximum zinc removal occurs in the pH range of 2–6 with an initial zinc content of 50–250 mg/L and a resin dosage of 25–700 mg/L, indicating that the adsorption process is pH-dependent. Various isotherm models, including those proposed by Freundlich and Langmuir as well as Redlich-Peterson, Dubinin, and Temkin, are used to verify the results of the experimental research. All these isotherm models' constants are determined. Both resins showed different sorption efficiencies at different operating conditions. However, highest Zn removal efficiency of 86.2% was observed for the Thomsonite zeolite resin whereas Apophyllite zeolite resin showed maximum Zn uptake of 81.6%. Thus, Thomsonite was found to be an effective sorbent.
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