吸附
氧化铈
介孔材料
水溶液
朗缪尔吸附模型
化学
Zeta电位
铈
傅里叶变换红外光谱
打赌理论
砷
核化学
降水
氧化物
无机化学
化学工程
催化作用
有机化学
纳米颗粒
气象学
工程类
物理
作者
Uttam Kumar Sahu,Sandip Mandal,Sumanta Sahu,Narayan Gouda,Raj Kishore Patel
标识
DOI:10.3846/jeelm.2022.16749
摘要
In the present work, the adsorption of carcinogenic pentavalent arsenic (As(V)) from an aqueous solution was studied using mesoporous cerium oxide (MCO). The MCO was synthesized in the precipitation process and confirmed by FT-IR, SEM-EDX, XRD, and BET instrumental techniques. Batch adsorption showed that 95% of As(V) was removed in the optimum conditions of 0.60 g/L adsorbent dose, 10 mg/L initial concentration, time 30 min, and pH 3. Pseudo-secondorder kinetics and the Langmuir isotherm model were fitted to the experimental data. The MCO had a high surface area of 191.97 m2/g and a maximum adsorption capacity of 58.25 mg/g at pH 3. MCO could be able to remove 88% and 82% in the first and second cycles after being desorbed with 0.1 M NaOH solution. The Zeta potential and FTIR studies suggested that electrostatic attraction and ligand exchange mechanisms were responsible for As(V) adsorption.
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