Investigation on the removal of Mo(VI) from Mo-Re containing wastewater by chemically modified persimmon residua.
Investigation on the removal of Mo(VI) from Mo-Re containing wastewater by chemically modified persimmon residua.
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DOI：
10.1016/j.biortech.2011.04.040
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发表时间：
2011-07
影响因子：
11.4
通讯作者：
Y. Xiong;Chengbo Chen;X. Gu;B. Biswas;W. Shan;Z. Lou;Dawei Fang;S. Zang
中科院分区：
文献类型：
--
作者：
Y. Xiong;Chengbo Chen;X. Gu;B. Biswas;W. Shan;Z. Lou;Dawei Fang;S. Zang
采用浓硫酸交联法对柿子单宁废料进行化学改性，制备了一种新型的吸附凝胶--交联柿子单宁（CPT）。研究了钼（VI）与其它共存金属离子在CPT凝胶上的吸附行为。该凝胶对Mo（VI）离子具有很高的分离因子（βMo/Re= 164.37），表明该凝胶对Mo（VI）离子具有选择性，并对Mo（VI）的多物种吸附机理进行了研究。钼的吸附符合Langmuir吸附模型，吸附容量高达0.56mol/kg。不同温度下吸附动力学研究表明，吸附过程符合准二级反应动力学。通过对不同含钼铼工业废水中钼（VI）的去除和分离实验，证明了其对钼（VI）的优良吸附性能和适用性。
Persimmon waste was chemically modified by crosslinking with concentrated sulfuric acid to obtain a novel kind of adsorption gel, which was termed as crosslinked persimmon tannin (CPT), hereinafter. The adsorption behaviors of Mo(VI) with other coexisting metal ions onto the CPT gel were investigated. The gel exhibited selectivity only for Mo(VI) ions evidenced by the high value of separation factor of molybdenum and rhenium (βMo/Re= 164.37), and the adsorption mechanism of Mo(VI) as a multispecies was studied. The molybdenum adsorption behavior conforms to the Langmuir model with a remarkably high adsorption capacity of 0.56 mol/kg. A kinetic study for the adsorption of molybdenum at various temperatures confirmed that the endothermic adsorption process followed pseudo-second order kinetics. Moreover, its excellent adsorption properties and applicability for Mo(VI) were demonstrated by the removal and separation of Mo(VI) from different Mo–Re containing industrial wastewaters.