Preparation of Fly Ash/rare Earth Adsorbent and Its Adsorption for Reactive Dye from Aqueous Solution
Lanthanum doped fly ash (La-FA) adsorbent was prepared using hydrothermal reaction method and applied to the removal of wool-used reactive red B (WRR B) dye from the aqueous solution.The preparation and adsorption conditions of the sorbent were investigated.The adsorption characteristics and mechanism were analyzed by X-ray diffraction (XRD) and discussed from kinetics viewpoint.The results show that: the removal rate of WRR B from the solution containing 150 mg/L at pH 6.0 by La-FA adsorbent,which obtained under the conditions of a certain ratio of mass to concentration of La3+ and stirring time of 6h at 60℃,is 94% with good adsorption effect when the contact time is 2.5h at temperature of 25℃.All sorption kinetic data at different temperature are found to be described by the pseudo-second order equation very well and the adsorption process is mainly controlled by intra-particle diffusion.The equilibrium adsorption amount (qe) of the La-FA adsorbent for reactive dyes increased with increase in dye initial concentration and decreased with the rise of temperature.The adsorption activation energy obtained was 9.86kJ/mol.Combining with XRD analysis,the results indicate that the adsorption is mainly the physical sorption with exothermic nature.The room temperature is favorable to the adsorption and actual operation.
Fly ash La3+ Wool-used reactive red B Adsorption properties
Chen Wang Beigang Li Jing Mi
Chemistry ＆ Environment Science College, Inner Mongolia Normal University,Hohhot 010022, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
409-413
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）