CAJ | 학술논문

文章研究以天然铝土矿物为原料制备的除氟剂的吸附性能及其影响因素,静态吸附实验以及对吸附动力学、热力学的理论分析表明:除氟剂的吸附容量在pH值低于6.0时保持稳定,而高于6.0时随pH值升高而降低,故其最优pH值应为6.0左右;在初始F-质量浓度介于5 ～100 mg/L之间的研究范围内,吸附容量随F-初始浓度呈线性增长;随除氟剂投加量的增大,被吸附的F-量增加,但单位吸附剂的吸附量减少;在反应的前30 min 吸附速度比较快,随着时间的延长,吸附速度放慢,故吸附时间应控制在15～30 min之间较为适宜;铝土矿除氟剂对氟离子的吸附作用符合拟二级反应方程,吸附等温线符合Freundlich等温吸附模型.
문장연구이천연려토광물위원료제비적제불제적흡부성능급기영향인소,정태흡부실험이급대흡부동역학、열역학적이론분석표명:제불제적흡부용량재pH치저우6.0시보지은정,이고우6.0시수pH치승고이강저,고기최우pH치응위6.0좌우;재초시F-질량농도개우5 ～100 mg/L지간적연구범위내,흡부용량수F-초시농도정선성증장;수제불제투가량적증대,피흡부적F-량증가,단단위흡부제적흡부량감소;재반응적전30 min 흡부속도비교쾌,수착시간적연장,흡부속도방만,고흡부시간응공제재15～30 min지간교위괄의;려토광제불제대불리자적흡부작용부합의이급반응방정,흡부등온선부합Freundlich등온흡부모형.
The adsorption characteristics and influencing parameters of the fluoride adsorbent prepared from natural bauxite were investigated. Results show that the adsorption capacity kept constant at pH below 6.0 and increased at pH above 6.0. Therefore, the optimum pH range for adsorbent preparation was around 6.0. In the optimum condition of pH, the adsorption capacity was proved to be linear to the initial F- concentration ranging between 5 mg/L and 100 mg/L. With the increase of adsorbent addition, the F- adsorbed increased, while the adsorption capacity decreased. Within the initial 30 min, the rate of adsorption was high and reduced in the following reaction. Therefore, the adsorption time should be kept in 15～30 min. The adsorption process was found to follow pseudo-second-order rate kinetics as well as the Freundlich isotherm.