CAJ | 학술논문

采用湿式化学法合成了磁性多壁碳纳米管（MWCNTs）,用透射电镜、X-射线衍射、傅里叶变换红外光谱、比表面积分析仪对磁性MWCNTs的表面特性进行了表征.考察了溶液pH值、吸附时间等因素对水中镉（Ⅱ）、铜（Ⅱ）和锌（Ⅱ）吸附过程的影响.结果表明：金属离子的吸附过程强烈依赖于pH值,金属离子的去除率随着溶液pH值的增大而增大,当溶液pH值达到一定值时,去除率达到最大,然后保持不变;吸附动力学分析与等温线拟合表明,准二级模型准确地反映了吸附过程的动力学,Freundlich等温线更好地说明了升高温度有利于吸附的事实.对热力学参数（ΔH0,ΔS0和ΔG0）的计算结果揭示了吸附过程具有自发且吸热的性质.
채용습식화학법합성료자성다벽탄납미관（MWCNTs）,용투사전경、X-사선연사、부리협변환홍외광보、비표면적분석의대자성MWCNTs적표면특성진행료표정.고찰료용액pH치、흡부시간등인소대수중력（Ⅱ）、동（Ⅱ）화자（Ⅱ）흡부과정적영향.결과표명：금속리자적흡부과정강렬의뢰우pH치,금속리자적거제솔수착용액pH치적증대이증대,당용액pH치체도일정치시,거제솔체도최대,연후보지불변;흡부동역학분석여등온선의합표명,준이급모형준학지반영료흡부과정적동역학,Freundlich등온선경호지설명료승고온도유리우흡부적사실.대열역학삼수（ΔH0,ΔS0화ΔG0）적계산결과게시료흡부과정구유자발차흡열적성질.
The magnetic multi-walled carbon nanotubes （MWCNTs） were synthesized by wet chemical treatments; and the surface properties of magnetic MWCNTs were characterized by transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and specific surface area analyzer. The effects of pH values and adsorption time of the im- pact on the adsorption of Cd （ Ⅱ ）, Cu （ Ⅱ ） and Zn （Ⅱ） ions in aqueous solutions were discussed. The results showed that the adsorption was strongly dependent on pH values, that the removal rate of metal ions increased with solution pH values, and that the rate was at the maximum and remained unchanged when the solution pH value reached a certain degree. Adsorption kinetics analysis and isotherm fitting demonstrated that the pseudo second order model could accurately represent the kinetics of adsorption process, and that Freundlich isotherm better explained that the high temperature was beneficial to the adsorp- tion experiments. The calculating results of the thermodynamic parameters （ΔH0, ΔS0,ΔG0） revealed that the adsorption process was spontaneous and endothermic.