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首页> 外文期刊>Cogent Environmental Science >Adsorptive behavior, isothermal studies and kinetic modeling involved in removal of divalent lead from aqueous solutions, using Carissa carandas and Syzygium aromaticum
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Adsorptive behavior, isothermal studies and kinetic modeling involved in removal of divalent lead from aqueous solutions, using Carissa carandas and Syzygium aromaticum

机译：使用Carissa carandas和Syzygiumaromaticum从水溶液中去除二价铅的吸附行为，等温研究和动力学模型

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This study is focused on the biosorption of lead(II) ion onto surface of Carissa carandas and Syzygium aromaticum biomass from aqueous solution. The operating parameters, pH of solution, biomass dosage, contact time, initial metal ion concentration, and temperature considerably affect the biosorption efficiency of Pb(II). Biosorbent C. carandas leaf powder showed higher sorption efficiency than that of biosorbent S. aromaticum powder under identical experimental conditions. It was observed that the lead(II) removal percentage was found highest of 95.11% for C. carandas and 91.04% for S. aromaticum at contact period of 180?min. Also, it was observed that the regression coefficient (R ~(2)?=?0.99) for the pseudo-second-order kinetic model is higher in comparison with the pseudo-first-order kinetic model and the calculated value of q _(e ) for the pseudo-second-order kinetic model is very close to the experimental value, which indicates that it fits well with the equilibrium data for Pb(II) sorption from aqueous solutions on biosorbents. Also, the adsorption of Pb(II) onto C. carandas was best described by the Freundlich isotherm model.
机译：这项研究的重点是水溶液中铅（II）离子在Cari​​ssa carandas和Syzygium aromaum生物质表面上的生物吸附。操作参数，溶液的pH值，生物量，接触时间，初始金属离子浓度和温度会极大地影响Pb（II）的生物吸附效率。生物吸附剂C。 anda叶粉末显示出比生物吸附剂 S更高的吸附效率。在相同的实验条件下制成的香精粉。观察到对于iC，发现铅（II）的去除百分比最高为95.11％。卡兰达斯和 S的91.04％。接触时间为180分钟的芳香精。此外，还观察到，伪二阶动力学模型的回归系数（iR〜（2）α=Δ0.99）高于伪一阶动力学模型，并且其计算值拟二阶动力学模型的 q _（ e）与实验值非常接近，这表明它与生物吸附剂上水溶液吸附Pb（II）的平衡数据非常吻合。同样，Pb（II）在iC上的吸附。用Freundlich等温线模型最好地描述了卡兰兹。

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