Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, 17104, South Korea.
Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, 17104, South Korea.
Chemosphere. 2021 May;270:129487. doi: 10.1016/j.chemosphere.2020.129487. Epub 2020 Dec 31.
Industrial waste discharge comprising heavy metals into potable water bodies induces many health hazards. This study investigates the role of metal-organic frameworks (MOFs) doped alginate beads (MOFs@ABs) as potential adsorbents for Cr(VI). Effects of pH, stirring rate, temperature, initial chrome concentration, and particles dosage on Cr(VI) adsorption are studied to evaluate adsorption ability of UiO-66@ABs for Cr(VI) removal from aqueous solution. The adsorption kinetics follows pseudo second order and the equilibrium isotherm is consistent with Langmuir isotherm model. The maximum adsorption capacity of UiO-66@ABs calculated from the model conforms to the experimental results. The desorption experiment of Cr(VI) adsorbed UiO-66@ABs (82%) demonstrates satisfactory regeneration efficiency. Based on our findings and comparative controlled experiments, the superiority of UiO-66@ABs promises their potential application in Cr(VI) removal from wastewater.
工业废水排放中的重金属进入饮用水体，引发诸多健康危害。本研究探讨了金属有机骨架（MOFs）掺杂海藻酸钠珠（MOFs@ABs）作为 Cr(VI) 潜在吸附剂的作用。考察了 pH 值、搅拌速率、温度、初始铬浓度和颗粒剂量对 Cr(VI)吸附的影响，以评估 UiO-66@ABs 对水溶液中 Cr(VI)去除的吸附能力。吸附动力学符合拟二级动力学模型，平衡等温线与朗缪尔等温模型一致。从模型计算得到的 UiO-66@ABs 的最大吸附容量与实验结果相符。吸附了 Cr(VI)的 UiO-66@ABs（82%）的解吸实验表现出令人满意的再生效率。基于我们的研究结果和对照实验，UiO-66@ABs 的优越性表明其在从废水中去除 Cr(VI)方面具有潜在的应用前景。
