摘要
采用浸渍法成功制备了负载La OH的膨胀石墨除磷剂(expanded graphite-La OH,EG-La OH),探讨了制备过程中的最优工艺条件,考察了初始磷浓度、投加量、干扰离子和再生对吸附剂除磷性能的影响.制备EG-La OH的最优工艺条件如下:镧浓度为0.10 mol/L,浸渍时间为40 min.随着初始磷浓度的增加,EG-La OH的除磷吸附容量逐渐增大,继而保持恒定.随着吸附剂投加量的增加,其除磷吸附容量逐渐降低.溶液中F-,Cl-的存在对该吸附剂的除磷效果有一定的干扰.该吸附剂在25和90?C下再生一次后,其除磷吸附容量分别为9.48和14.40 mg/g.
Expanded graphite-LaOH （EG-LaOH） was fabricated successfully using an immersion method. The best synthesis conditions were studied. Influences of initial phos- phate concentration, interfering anions and dosage were investigated as well. The best con-dition of EG-LaOH preparation was La concentration of 0.10 mol/L and immersion time of 40 min. Removal capacity of EG-LaOH was gradually improved and then kept unchanged with the increase of phosphate concentration but decreased with the rise of dosage. F-and Cl^- had only limited impact on phosphorus removal of EG-LaOH. After the first recovery under the condition of 25 and 90 ℃, removal capacities of EG-LaOH could still reach 9.48 and 14.40 mg/g, respectively.
作者
苏阳
靳苏皖
张玲
SU Yang JIN Suwan ZHANG Ling(School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, Chin)
出处
《上海大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第6期775-783,共9页
Journal of Shanghai University:Natural Science Edition
基金
国家自然科学基金资助项目(21207085)
上海市教委科研创新基金资助项目(14YZ014)
关键词
除磷
镧
膨胀石墨
再生
phospha.te adsorption
lanthanum
expanded graphite （EG）
recovery
