胺基化杂化微球对溶解中Cu（II）和Pb（II）的吸附-《郑州大学学报(工学版)》

文章信息/Info

Title:: Adsorption of Cu( II) and Pb( II) in Solution of Aminated Hybrid Microspheres

Author(s):: ZHANG Jie; SHANG Cheng-jiang; Chen Wei-hang; WANG Jing-tao; School of Chemical Engineering and Energy ,Zhengzhou University , Zhengzhou 450001 ,China

摘要:: 通过蒸馏共沉淀聚合反应和酰胺反应制备胺基功能化核–壳型有机/无机杂化二氧化硅微球Р(DETA - co -EGDMA)/SiO. ,该杂化微球无机内核直径约为400 nm,有机高分子外壳厚度约为33 nm.元素分析表明胺基化杂化微球上N元素的含量为2.91%．将所制备的胺基化杂化微球用于吸附污水中Cu(Ⅱ)和 Pb(II)．结果表明:胺基化杂化微球较甲基丙烯酸化杂化微球P(MAA-co-EGDMA )/Si0,和未改性SiO,微球对Cu(ⅡI)和Pb(II)有更好的吸附性能;吸附过程符合Langmuir等温吸附模型,在298 K时对Cu( ⅡI)和Pb(II)的最大吸附容量分别为45.50 mg/g和70.75 mg/ g ;吸附动力学行为符合准二级动力学模型;三次脱附再生实验后胺基化杂化微球仍具有良好的再生率.

Abstract:: The aminated core-shell organic-inorganic hybrid silica microspheres P( DETA-co-EGDMA)/Si0,were prepared by distilation precipitation polymerization and amide reaction.The diameter of hybrid micro-spheres inorganic core was ca. 400 nm and the thickness of organic polymer shell was ca. 33 nm.The amina-ted hybrid microspheres were characterized by elemental analysis and it was found that N element content ofmicrospheres was 2.91 % .The adsorption behaviors of aminated hybrid microspheres on heavy metal ions Cu(lI) and Pb( II) were investigated,which showed that aminated hybrid microspheres exhibited larger adsorp-tion capacities than methacrylic acid hybrid microspheres P(MAA-co-EGDMA )/SiO2 and unmodified silicamicrospheres.The adsorption isotherm of aminated hybrid microspheres followed the Langmuir model and themaximum adsorption capacities of aminated hybrid microspheres was 45.50 mg/g for Cu(ll) and 70.75 mg/gfor Pb( II) at 298 K,respectively. The adsorption kinetics were consistent with pseudo-second order model.The aminated hybrid microspheres still maintained excellent regeneration ratios through thrice desorption andregeneration experiment.