Nano-hydroxyapatite polymeric hydrogels for dye removal.
Nano-hydroxyapatite polymeric hydrogels for dye removal.
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DOI：
10.1039/c8ra01887a
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发表时间：
2018-05-16
期刊：
影响因子：
3.9
通讯作者：
Oyarzun P
中科院分区：
文献类型：
--
作者：
Varaprasad K;Nunez D;Yallapu MM;Jayaramudu T;Elgueta E;Oyarzun P
本文以蛤蜊壳和麦哲伦壳为原料，采用湿化学沉淀法合成了两种纳米羟基磷灰石。主要通过自由基聚合法制备了羧甲基纤维素/丙烯酰胺/纳米羟基磷灰石复合水凝胶，并研究了其对酸性蓝113（AB）水溶液的吸附性能。用重量法研究了水凝胶的溶胀行为和动力学行为。CMC-AM-水凝胶的溶胀性能受纳米羟基磷灰石中钙电解质（Ca 2+）含量的影响。在CMC-AM/nHA-CS（0.22353-0.27681 cm 2 s-1）和CMC-AM/nHA-MS（0.22377-0.29737 cm 2 s-1）水凝胶中，扩散系数值随着纳米羟基磷灰石含量的增加而增加。水分扩散的机制是反常输运。CMC-AM/nHA-MS水凝胶具有较高的AB吸附效率和吸附容量。这些结果说明，基于Magellan壳的纳米羟基磷灰石水凝胶是有吸引力的纳米复合水凝胶，用于在水净化应用中吸附染料。通过湿化学和自由基聚合工艺和nHA水凝胶的吸收工艺开发nHA和基于nHA的水凝胶的示意图。
Herein, two kinds of nano-hydroxyapatite were synthesized from Clam and Magellan shell by wet chemical precipitation method. Mainly, carboxymethyl cellulose/acrylamide/nano-hydroxyapatite composite hydrogels were developed via a free-radical polymerization process and investigated as a sorbent for Acid Blue 113 (AB) from aqueous AB solution. The swelled and kinetic behaviours of hydrogels were investigated using a gravimetric method. The swelling properties of the CMC-AM-hydrogels were influenced by the calcium electrolytes (Ca2+) content in nano-hydroxyapatites. The diffusion coefficient value increased with the increase of nano-hydroxyapatite content in the CMC-AM/nHA-CS (0.22353–0.27681 cm2 s−1) and CMC-AM/nHA-MS (0.22377–0.29737 cm2 s−1) hydrogels. The mechanism of water diffusion was found to be anomalous transport. The CMC-AM/nHA-MS hydrogels showed high AB absorption efficiency and adsorption capacities. These results explained that the nano-hydroxyapatites of Magellan shells based hydrogels are attractive nanocomposite hydrogels for the adsorption of dye in the water purification applications. Schematic diagram of nHA and nHA based hydrogels development via wet chemical and free-radical polymerization process and absorbent process of nHA hydrogel.
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影响因子：
3.3
作者：
El Khal, Hana;Batis, Narjes Harrouch
通讯作者：
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影响因子：
11.1
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0.5
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影响因子：
11.2
作者：
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