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Efficient removal of manganese ions from aqueous medium using a recyclable polymeric nanocomposite: A study of adsorption parameters and thermodynamics

机译:使用可回收的聚合物纳米复合材料有效去除水性介质中的锰离子:吸附参数和热力学的研究

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Herein, hybrid polymeric nano-composite (HPNC) was used for manganese metal ions (Mn2+) removal from aqueous solution. Different parameters were used for adsorption tests. The equilibrium studies were confirmed using Freundlich and Langmuir isotherms and the adsorption capacity was calculated to be 162 mg/g for Mn2+ by fitting the equilibrium data to the Langmuir model. The kinetic parameters showed that Mn2+ ions adsorption on HPNC followed pseudo-second-order kinetic model. Furthermore, the negative values of Delta G and Delta H evidence that Mn2+ adsorption on HPNC is an exothermic and spontaneous process in nature. The desorption studies displayed the best recovery of Mn2+ ions in 0.1 M HCl indicating that they can be recycled in industrial processes. Regeneration studies showed 41.40% and 40.26% loss in Mn2+ adsorption and recovery after four consecutive cycles, respectively. These findings suggest that HPNC has the promising application as an effective and economically feasible adsorbent for Mn2+ removal.
机译:本文中,使用杂化聚合物纳米复合材料(HPNC)从水溶液中去除锰金属离子(Mn2 +)。不同的参数用于吸附测试。使用Freundlich和Langmuir等温线确认了平衡研究,并通过将平衡数据拟合到Langmuir模型计算得出对Mn2 +的吸附容量为162 mg / g。动力学参数表明,MnNC +离子在HPNC上的吸附遵循伪二级动力学模型。此外,ΔG和ΔH的负值表明,HPNC上的Mn2 +吸附是自然的放热和自发过程。解吸研究显示在0.1 M HCl中Mn2 +离子的最佳回收率,表明它们可以在工业过程中回收。再生研究表明,连续四个循环后,Mn2 +的吸附和恢复损失分别为41.40%和40.26%。这些发现表明,HPNC作为一种有效且经济可行的Mn2 +去除吸附剂具有广阔的应用前景。

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