CAJ | 학술논문

采用廉价的煤矸石为主要原料,添加一定量的沥青粉制备了沸石NaA/活性炭粒状复合材料,并以此作为吸附剂,研究了水溶液中Ni~(2+)在该复合材料中的吸附行为,考察溶液的初始浓度、吸附时间和pH对吸附的影响.结果表明溶液较高的pH值有利于Ni~(2+)在吸附剂上的吸附;随Ni~(2+)初始浓度的增大复合材料的吸附量增大,而Ni~(2+)的去除率随之减小;Ni~(2+)在复合材料上的吸附接近Langmuir-Freundlich等温吸附模型,反映了吸附表面的多相性及两类吸附中心在复合材料上的共存性;吸附速率遵循准二级吸附动力学模型.
채용렴개적매안석위주요원료,첨가일정량적력청분제비료비석NaA/활성탄립상복합재료,병이차작위흡부제,연구료수용액중Ni~(2+)재해복합재료중적흡부행위,고찰용액적초시농도、흡부시간화pH대흡부적영향.결과표명용액교고적pH치유리우Ni~(2+)재흡부제상적흡부;수Ni~(2+)초시농도적증대복합재료적흡부량증대,이Ni~(2+)적거제솔수지감소;Ni~(2+)재복합재료상적흡부접근Langmuir-Freundlich등온흡부모형,반영료흡부표면적다상성급량류흡부중심재복합재료상적공존성;흡부속솔준순준이급흡부동역학모형.
Granular zeolite NaA/activated carbon composite has been prepared by adding pitch powder into elutrilithe as raw material.The capability of the composite to renlove Ni~(2+) ions from aqueous solutions by adsorption has been investigated under conditions of various pH.initial concentrations of metal ions and contact time.The capacity of adsorption increases with the increase of pH and initial concentration.and the removal of Ni~(2+)ions Can be 97.8%with the initial concentration of 23.4 mg/L and pH of 4.3.The adsorption isotherm fits well with the Langmnir-Freundlich isotherm(n=1.757),indicating the surface heterogeneity of the adsorbent and coexistence of two kinds of adsorption sites in composite.The overall rate of adsorption is pseudo-second order for the uptake of Ni~(2+).