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首页> 外文期刊>Journal of Residuals Science & Technology >Adsorption of Cu2+ and Pb2+ to Carboxylated Bagasse Hemicellulose
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Adsorption of Cu2+ and Pb2+ to Carboxylated Bagasse Hemicellulose

机译：羧化蔗渣半纤维素对Cu2 +和Pb2 +的吸附

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In this study, carboxylated bagasse hemicellulose was used as absorbent to adsorb ions Cu 2+ and Pb 2+ .The effects of pH and initial ions concentration on the adsorption capacity were discussed. The adsorption capacity was first increased and then decreased. The optimal pH for adsorption was 5.5. Thermodynamics showed that Freundlich adsorption isotherm can state the adsorption process of carboxylated hemicellulose for Cu 2+ and Pb 2+ . Adsorption was an exothermic process. The theoretical saturated adsorption capacities (q 2 ) for Cu 2+ and Pb 2+ were 19.28 mg.g -1 and 59.52 mg.g -1 . The Pseudo-second-order kinetics models for Cu 2+ and Pb 2+ were dqt/dt= 0.06(qt) 2 -2.41qt+23.30 and dqt/dt= 0.02(qt) 2 -2.82+89.96. The affinity of Pb 2+ to carboxylated hemicellulose was larger than that of Cu 2+ to carboxylated hemicellulose. Pb 2+ was easier adsorbed to carboxylated hemicellulose than Cu 2+ .
机译：本研究以羧化蔗渣半纤维素为吸附剂，吸附了Cu 2+和Pb 2+离子。探讨了pH和初始离子浓度对吸附能力的影响。吸附容量先增加然后减少。吸附的最佳pH为5.5。热力学表明，Freundlich吸附等温线可以阐明羧化半纤维素对Cu 2+和Pb 2+的吸附过程。吸附是放热过程。 Cu 2+和Pb 2+的理论饱和吸附容量（q 2）为19.28 mg.g -1和59.52 mg.g -1。 Cu 2+和Pb 2+的伪二级动力学模型为dqt / dt = 0.06（qt）2 -2.41qt + 23.30和dqt / dt = 0.02（qt）2 -2.82 + 89.96。 Pb 2+对羧化半纤维素的亲和力大于Cu 2+对羧化半纤维素的亲和力。与Cu 2+相比，Pb 2+更易于吸附到羧化半纤维素上。

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