吸附
结晶紫
阳离子聚合
化学
水溶液
朗缪尔吸附模型
傅里叶变换红外光谱
核化学
离子交换
尿素
化学工程
离子
有机化学
医学
病理
工程类
作者
Yuliana Shkliarenko,Vita Halysh,Alla Nesterenko
出处
期刊:Water
[MDPI AG]
日期:2023-04-14
卷期号:15 (8): 1536-1536
被引量:4
摘要
Adsorption of cationic dye crystal violet (CV) onto a modified walnut shell (WS) adsorbent was investigated. Combined treatment of WS using urea and sodium dodecylsulfate (SDS) was carried out. Surface modification of adsorbents was confirmed by FTIR analysis, pHpzc measurements, and elemental and SEM-EDX analysis. In order to optimize the adsorption conditions, the effect of solution pH, adsorbent dose and CV concentration was studied by means of central composite face-centered design (CCFD). The highest correlation between experimental and model data was obtained for the pseudo-second-order (PSO) kinetic model, assuming an ion exchange mechanism of adsorption. A satisfactory fit of CV adsorption data was obtained from the Langmuir adsorption isotherm, supporting a single layer adsorption. According to obtained results, modified WS can be considered as a low-cost, efficient and environmentally compatible biosorbent for the removal of cationic pollutants from aqueous solutions.
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