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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Fabrication of magnetic macroporous chitosan-g-poly (acrylic acid) hydrogel for removal of Cd2+ and Pb2+
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Fabrication of magnetic macroporous chitosan-g-poly (acrylic acid) hydrogel for removal of Cd2+ and Pb2+

机译：磁性大孔壳聚糖-g-聚（丙烯酸）水凝胶的制备以去除Cd2 +和Pb2 +

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摘要

A novel macroporous magnetic macroporous chitosan-g-poly (acrylic acid) hydrogel adsorbent was fabricated from the Pickering high internal emulsions template stabilized by modified Fe3O4 nanoparticles. The structure and composition of modified Fe3O4 and macroporous magnetic hydrogel were characterized by TEM, XRD, TG and SEM techniques. The characterization results suggest that the Fe3O4 nanoparticles have been modified successfully with organosilane of 3-aminopropyltrimethoxysilane (APTES), and the porous structure of the macroporous hydrogel can be tuned with the amount of stabilized particles, volume fraction of dispersed phase and the amount of the cosurfactant. Adsorption experiments indicate that the adsorption equilibrium was rapidly reached within 20 min and the maximal adsorption capacities were determined to be 308.84 mg/g for Cd2+ and 695.22 mg/g for Pb2+. After five adsorption-desorption cycles, the adsorbent can retain its high adsorption capacity. The introduction of Fe3O4 is beneficial to the recycle of adsorbent after usage. (C) 2016 Elsevier B.V. All rights reserved.
机译：从改性的Fe3O4纳米粒子稳定的Pickering高内部乳液模板制备了一种新型的大孔磁性大孔壳聚糖-g-聚（丙烯酸）水凝胶吸附剂。用TEM，XRD，TG和SEM技术对改性的Fe3O4和大孔磁性水凝胶的结构和组成进行了表征。表征结果表明，Fe3O4纳米粒子已成功地被3-氨基丙基三甲氧基硅烷（APTES）的有机硅烷改性，并且大孔水凝胶的多孔结构可以通过稳定化粒子的数量，分散相的体积分数和纳米粒子的数量来调节。助表面活性剂。吸附实验表明，吸附平衡在20分钟内迅速达到，最大吸附容量对Cd2 +为308.84 mg / g，对Pb2 +为695.22 mg / g。经过五个吸附-解吸循环，吸附剂可以保持其高吸附容量。 Fe 3 O 4的引入有利于使用后再循环吸附剂。 （C）2016 Elsevier B.V.保留所有权利。

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