海藻酸钠包埋纳米羟基磷灰石复合材料的合成及其对氟离子的选择性吸附。
Synthesis of alginate bioencapsulated nano-hydroxyapatite composite for selective fluoride sorption.
机构信息
Department of Chemistry, Anna University, University College of Engineering, Dindigul, Reddiyarchatram, Dindigul 624 622, Tamilnadu, India.
Department of Chemistry, Anna University, University College of Engineering, Dindigul, Reddiyarchatram, Dindigul 624 622, Tamilnadu, India.
出版信息
Carbohydr Polym. 2014 Nov 4;112:662-7. doi: 10.1016/j.carbpol.2014.06.029. Epub 2014 Jun 18.
This article focuses on the development of eco-friendly adsorbent by alginate (Alg) bioencapsulating nano-hydroxyapatite (n-HAp) namely n-HApAlg composite for defluoridation studies in batch mode. n-HAp powder utilized as a promising defluoridating material, but it causes a significant pressure drop during field applications. To overcome such technological bottlenecks, n-HApAlg composite was synthesized. The defluoridation capacity (DC) of synthesized n-HApAlg composite possesses an enhanced DC of 3870 mg F(-)/kg when compared to n-HAp and calcium alginate (CaAlg) composite which possess DC of 1296 and 680 mg F(-)/kg, respectively. The biocomposite features were characterized using FTIR and SEM with EDAX analysis. The various adsorption influencing parameters like contact time, pH, co-anions, initial fluoride concentration and temperature were optimized. The adsorption process was enlightened by various isotherms and kinetic models. The suitability of the biocomposite at field conditions was also tested.
本文专注于通过海藻酸钠（Alg）生物包封纳米羟基磷灰石（n-HAp）来开发环保吸附剂，即 n-HApAlg 复合材料，用于批量除氟研究。n-HAp 粉末作为一种很有前途的除氟材料，但在实际应用中会导致显著的压降。为了克服这些技术瓶颈，合成了 n-HApAlg 复合材料。与 n-HAp 和海藻酸钙（CaAlg）复合材料相比，合成的 n-HApAlg 复合材料具有增强的除氟容量（DC），分别为 3870 和 1296、680mg F(-)/kg。使用 FTIR 和 SEM 以及 EDAX 分析对生物复合材料的特性进行了表征。优化了接触时间、pH 值、共阴离子、初始氟浓度和温度等各种吸附影响参数。吸附过程由各种等温线和动力学模型说明。还测试了生物复合材料在现场条件下的适用性。
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