摘要
以介孔纳米γ-Al2O3为吸附材料,重点研究了吸附剂投加量、溶液pH、吸附时间及温度对介孔纳米γ-Al2O3吸附稀土元素镧、铈的影响。通过正交实验优选出介孔纳米γ-Al2O3对稀土元素镧铈吸附的最优参数,采用10 mg/L的La3+、Ce4+标准溶液,选择投加量、pH、吸附时间为影响因素,进行3因素3水平的正交实验。通过正交实验与单因素实验综合分析表明最佳实验方案为:投加量为0.20 g,pH为7,吸附时间为15 min。在初始浓度为10～100 mg/L时,介孔纳米γ-Al2O3对La3+、Ce4+的吸附符合Langmuir等温吸附式。拟合得到的理论饱和吸附量分别为22.32 mg/g和23.75 mg/g。
With mesoporous nanometerγ-Al2O3 as the absorbent,the effects of adsorbent dosage, pH,con- tact time, adsorption temperature were studied. Parameters for mesoporous nanometerγ-Al2O3 of rare earth ele- ments lanthanum and cerium adsorption were optimized by orthogonal experimental method. With the 10 mg/L initial lanthanum and cerium concentration as the original solution,the adsorbent dosage, pH and contact time as variable factors were selected by orthogonal test. Compared with the orthogonal experiment and single factor ex- periment, the best scheme was found：adsorbent dosage of 0.20 g, pH of 7 and contact time of 15 min. With the initial concentration range of 10 - 100 mg/L, mesoporous nanometer γ-Al2O3 for La3＋ and Ce4＋ species fitted the Langmiur adsorption isothermal model. The saturated extents of adsorption of La3＋ and Ce4＋ were 22.32 mg/g and 23.75 mg/g, respectively.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第12期4519-4524,共6页
Chinese Journal of Environmental Engineering
基金
国家环境保护部环保公益性行业科研专项项目(200909032)
包头市园区建设(2008Y2016)
关键词
介孔纳米γ-Al2O3
稀土元素
吸附
正交实验设计
等温吸附模型
mesoporous nanometerγ-Al2O3
rare earth elements
adsorption
orthogonal experimental de- sign
isothermal adsorption model
