Removal of phosphate using iron oxide nanoparticles synthesized by eucalyptus leaf extract in the presence of CTAB surfactant
Removal of phosphate using iron oxide nanoparticles synthesized by eucalyptus leaf extract in the presence of CTAB surfactant
复制标题
在 CTAB 表面活性剂存在下，使用桉叶提取物合成的氧化铁纳米粒子去除磷酸盐
DOI：
10.1016/j.chemosphere.2016.05.080
复制
发表时间：
2016-09-01
期刊：
影响因子：
8.8
通讯作者：
Chen, Zuliang
中科院分区：
文献类型：
--
作者：
Cao, Dan;Jin, Xiaoying;Chen, Zuliang
This study investigated the use of cetyltrimethylammonium bromide (CTAB) as a stabilizer in green synthesis to improve the reactivity of iron oxide nanoparticles (IONP). Results show that efficiency in removing phosphate increased from 71.0% to 97.3%. To understand how to improve the reactivity of IONP by CTAB: firstly, characterizations of IONP before and after phosphate removal by SEM, EDS, FTIR, XPS show the adsorption of P onto the IONP; secondly, batch experiments indicate that the adsorption capacity of phosphate increased when temperature or initial phosphate concentration increased and decreased with an increase in both adsorbent dose and pH. Adsorption followed the pseudo-second-order kinetics model and the equilibrium data fitted well to the Langmuir isotherm. Thermodynamic data confirmed the spontaneous and endothermic nature of the adsorption process. Finally, it was proposed that the adsorption of phosphate using CTAB-modified IONP was mainly associated with inner-sphere complexing mechanism and electrostatic attraction. (C) 2016 Elsevier Ltd. All rights reserved.
