Centralized Resource Laboratory, University of Peshawar, Peshawar 25120, Pakistan E-mail:
Department of Chemistry, Islamia College Peshawar, Peshawar 25120, Pakistan.
Water Sci Technol. 2020 Dec;82(11):2552-2561. doi: 10.2166/wst.2020.527.
Zero valent Fe/Cu functionalized spent tea adsorbent was prepared for the decontamination of Cd(II) contaminated water. The synthesized material was characterized for structural and morphological characteristics using various analytical techniques. The material was used as adsorbent for the adsorption of Cd(II) from aqueous solutions in batch study experiments. The effect of initial pH, adsorbent dosage, contact time and adsorbate concentration was investigated. The obtained data well followed the Langmuir adsorption isotherm model and pseudo-second order rate model with maximum adsorption capacity of 89.686 mg·g. Based on Langmuir separation factor (R), having a value of 0.706-0.194, the adsorption process was confirmed to be favorable. The adsorbent was used in the form of a column for the sorption of Cd(II) from a running solution with satisfactory results. The spent material was regenerated and reutilized with reduction of adsorption capacity by 1.48% only. Overall, the current adsorbent can be efficiently utilized for the removal of aqueous Cd(II).
零价 Fe/Cu 功能化废茶吸附剂用于受污染水的 Cd(II) 去除。采用多种分析技术对合成材料的结构和形态特征进行了表征。在批处理实验中，将该材料用作从水溶液中吸附 Cd(II) 的吸附剂。考察了初始 pH 值、吸附剂用量、接触时间和吸附质浓度的影响。获得的数据很好地遵循了 Langmuir 吸附等温线模型和准二级速率模型，最大吸附容量为 89.686mg·g。基于 Langmuir 分离因子（R），其值为 0.706-0.194，证实了吸附过程是有利的。以柱状形式使用吸附剂从运行溶液中吸附 Cd(II)，效果令人满意。用过的材料被再生并重新使用，吸附容量仅降低了 1.48%。总的来说，该新型吸附剂可以有效地用于去除水溶液中的 Cd(II)。
