摘要
利用人工合成的水铁矿对水中的铬(Ⅵ)进行吸附研究,考察了吸附时间、吸附剂用量、离子强度等对吸附效果的影响。结果表明,在室温条件下,水铁矿吸附Cr(Ⅵ)达到吸附平衡用时约120 min,吸附剂水铁矿的最佳投加量为2 g/L;在p H为2~4、离子强度为0.01~0.02 mol/L时,Cr(Ⅵ)的去除率较高。水铁矿吸附Cr(Ⅵ)的动力学过程可用准二级动力学方程描述,而吸附平衡过程符合Freundlich等温吸附模型。
The adsorption characteristics of synthetic ferrihydrite for Cr（Ⅵ）in water has been studied. The influ-ences of adsorption time,adsorbent dosage,ionic strength,etc. on the adsorbing effect are investigated. The re-sults show that under room temperature condition,it takes about 120 min for ferrihydrite to adsorb Cr（Ⅵ）andreach adsorption equilibrium. The optimum dosage of the adsorbent ferrihydrite is 2 g/L. When pH is 2-4,and ion-ic strength 0.01-0.02 mol/L,the Cr（Ⅵ）removing rate is comparatively high. The kinetics process of ferrihydritefor adsorbing Cr（Ⅵ）can be described by pseudo-second-order kinetics equation,while the adsorption equilibriumcomplies with the Freundlich isotherm adsorption model.
出处
《工业水处理》
CAS
CSCD
北大核心
2017年第2期29-33,共5页
Industrial Water Treatment
基金
国家自然科学基金项目(41371299
41371248)
关键词
水铁矿
六价铬
吸附
污水处理
ferrihydrite
Cr（Ⅵ）
adsorption
wastewater treatment
