Selective adsorption of molybdenum(VI) from Mo-Re bearing effluent by chemically modified astringent persimmon.
Selective adsorption of molybdenum(VI) from Mo-Re bearing effluent by chemically modified astringent persimmon.
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DOI：
10.1016/j.jhazmat.2010.12.077
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发表时间：
2011-02
影响因子：
13.6
通讯作者：
Y. Xiong;Haitao Wang;Z. Lou;W. Shan;Z. Xing;Guichun Deng;Dong-bei Wu;Dawei Fang;B. Biswas
中科院分区：
文献类型：
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作者：
Y. Xiong;Haitao Wang;Z. Lou;W. Shan;Z. Xing;Guichun Deng;Dong-bei Wu;Dawei Fang;B. Biswas
采用甲醛对涩柿进行化学交联，得到一种新型吸附凝胶，命名为APF凝胶。本文研究了Mo(VI)和Re(VII)以及其他共存金属在APF凝胶上的吸附行为。研究发现 APF 凝胶可有效吸附 Mo(VI)，而该凝胶在整个盐酸浓度范围内对铼和钙几乎完全呈惰性。当HCl浓度高于1mol/L时，APF凝胶对铁、铜、铅、镍、锰、锌离子的亲和力较低。该凝胶仅对Mo(VI)表现出选择性，吸附容量高达1.05mol/kg，吸附行为遵循Langmuir模型。根据热力学和动力学研究，吸热吸附过程遵循准二级动力学。此外，通过使用 APF 凝胶填充的柱进行吸附和洗脱测试，证实了其对 Mo(VI) 的优异吸附特性。该结果为从工业废水中回收Mo(VI)提供了一种新方法。
Astringent persimmon was chemically cross-linked by formaldehyde to obtain a novel kind of adsorption gel, which was named as APF gel. The adsorption behaviors of Mo(VI) and Re(VII) along with other coexisting metals onto the APF gel were studied in the present paper. The APF gel was found to be effective for the adsorption of Mo(VI) while the gel is almost completely inert toward rhenium and calcium over the whole hydrochloric acid concentration region. The APF gel has a low affinity for iron, copper, lead, nickel, manganese and zinc ions when the concentration of HCl is higher than 1mol/L. The gel exhibited selectivity only for Mo(VI) with a remarkably high adsorption capacity 1.05mol/kg, and the adsorption behavior obeys the Langmuir model. According to the thermodynamic and kinetic studies, the endothermic adsorption process followed pseudo-second order kinetics. Also, its excellent adsorption characteristics for Mo(VI) were confirmed by the adsorption and elution tests using a column packed with the APF gel. The result provides a new approach for the recovery of Mo(VI) from a industrial waste effluent.