CAJ | 학술논문

使用乙二胺改性的木屑黄原酸盐对水溶液中的Cu(II)、Ni(II)离子进行吸附。在单离子体系中，考虑影响因素(温度、投加量)对Cu(II)、Ni(II)单离子吸附等温线的影响；并计算Cu(II)、Ni(II)离子吸附的热力学参数：吸附吉布斯自由能(?GΘ)、吸附过程的焓变(?HΘ)以及熵变(?SΘ)，表明此吸附是一个放热自发的过程。在 Cu(II)和Ni(II)双离子体系中，采用修正后的拓展Langmuir模型对体系的吸附情况可以进行很好的预测。在单离子体系和双离子体系中，吸附过程的数据均可通过准二级动力学模型进行描述；计算得到其对Cu(II)和Ni(II)单离子的吸附活化能分别为59.12和55.92 kJ/mol。结果表明，金属离子在改性木屑表面的吸附效果会受到另一离子存在的影响。
사용을이알개성적목설황원산염대수용액중적Cu(II)、Ni(II)리자진행흡부。재단리자체계중，고필영향인소(온도、투가량)대Cu(II)、Ni(II)단리자흡부등온선적영향；병계산Cu(II)、Ni(II)리자흡부적열역학삼수：흡부길포사자유능(?GΘ)、흡부과정적함변(?HΘ)이급적변(?SΘ)，표명차흡부시일개방열자발적과정。재 Cu(II)화Ni(II)쌍리자체계중，채용수정후적탁전Langmuir모형대체계적흡부정황가이진행흔호적예측。재단리자체계화쌍리자체계중，흡부과정적수거균가통과준이급동역학모형진행묘술；계산득도기대Cu(II)화Ni(II)단리자적흡부활화능분별위59.12화55.92 kJ/mol。결과표명，금속리자재개성목설표면적흡부효과회수도령일리자존재적영향。
Sawdust xanthate modified with ethanediamine was used for the removal of Cu(II) and Ni(II) from aqueous solution. The influence of various operating parameters such temperature and adsorbent dosage on the adsorption isotherms of modified sawdust was investigated. Thermodynamic parameters, namely Gibbs free energy (?GΘ), enthalpy (?HΘ) and entropy (?SΘ) of Cu(II) and Ni(II) adsorption process were calculated, showing that the adsorption is a spontaneous and exothermic process. The modified extended Langmuir equation approaches provide excellent prediction of the binary adsorption. In single and binary systems, the overall adsorption data were best described by the pseudo-second order kinetic model, then the calculated values of activation energy of Cu(II) and Ni(II) adsorption process were 59.12 and 55.92 kJ/mol respectively. The results show that the affinity of each metal ion onto the modified sawdust surface is influenced by the presence of the other one.