负载氢氧化镧的膨胀石墨除磷剂的制备、性能及再生

doi:10.3969/j.issn.1007-2861.2015.02.017

摘要/Abstract

摘要：

采用浸渍法成功制备了负载LaOH 的膨胀石墨除磷剂(expanded graphite-LaOH, EG-LaOH), 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-LaOH 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-LaOH 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 ℃下再生一次后, 其除磷吸附容量分别为9.48 和14.40 mg/g.

关键词: 镧, 膨胀石墨, 再生, 除磷

Abstract:

Expanded graphite-LaOH (EG-LaOH) was fabricated successfully using an immersion method. The best synthesis conditions were studied. Influences of initial phosphate concentration, interfering anions and dosage were investigated as well. The best condition 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.

Key words: lanthanum , expanded graphite (EG) , recovery, phosphate adsorption

苏阳, 靳苏皖, 张玲. 负载氢氧化镧的膨胀石墨除磷剂的制备、性能及再生[J]. 上海大学学报(自然科学版), 2016, 22(6): 776-783.

SU Yang, JIN Suwan, ZHANG Ling. Preparation, performance and recovery of expanded graphite loaded with lanthanum hydroxide[J]. Journal of Shanghai University（Natural Science Edition）, 2016, 22(6): 776-783.

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