摘要
选用5种不同的铁盐对活性炭进行改性,采用浸润法制备活性炭负载铁盐的复合材料(GAC-Fe),并运用X射线衍射(XRD)和红外光谱(FTIR)对材料GAC-Fe进行表征.考察在不同p H值和初始浓度条件下高氯酸盐的去除效果,分析吸附等温模型和吸附动力学,并探讨反应机理.结果表明,活性炭负载FeCl_3制备的复合材料对ClO_4^-的效果去除最好,去除效率达97%;ClO_4^-的去除效果在中性和弱偏酸性条件下较好,吸附等温实验表明Langmuir模型优于Freundlich模型描述复合材料(GAC-Fe)对ClO_4^-吸附过程;吸附动力学结果表明复合材料(GAC-FeCl_3)对ClO_4^-的吸附更加符合准二级动力学方程.
Five different iron salts were chosen for modified activated carbon,and iron salts supported on activated carbon（GAC-Fe）was synthesized in infiltration,the GAC-Fe were characterized through X-ray diffraction（XRD）and Fourier transform infrared spectroscopy（FTIR）.The effect of different p H and initial ClO_4^- concentration adsorbed perchlorate,adsorption isothermal models and kinetics were studied,and its reaction mechanisms were assessed.The results show that the effect of removal of ClO_4^- is the best with Fe Cl_3 supported on activated carbon,and the removal rate is 97 %;the removal rate of ClO_4^- under the neutral and weak acid condition is better.Adsorption isotherm experiments show that Langmuir model is better than Freundlich model in describing the composite material adsorption of ClO_4^- process.Adsorption kinetics result shows that the adsorption of ClO_4^- of composite material（GAC-FeCl_3）is more in line with the pseudo-secondary dynamics equation.
出处
《有色金属科学与工程》
CAS
2016年第2期48-53,共6页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(51178321
51064008)
关键词
活性炭
高氯酸盐
铁盐
吸附等温
动力学
activated carbon
perchlorate
iron salts
adsorption isothermal
kinetic
