Arsenate adsorption onto Fe-TNTs prepared by a novel water-ethanol   hydrothermal method: Mechanism and synergistic effect

doi:10.1016/j.jcis.2014.10.036

CORC > 北京大学 > 环境科学与工程学院

	Arsenate adsorption onto Fe-TNTs prepared by a novel water-ethanol hydrothermal method: Mechanism and synergistic effect
	Wang, Yanqi ; Liu, Wen ; Wang, Ting ; Ni, Jinren
刊名	胶体与界面科学杂志
	2015
关键词	Fe-TNTs Synergistic effect Arsenate Complexation Two-site Langmuir NANOCRYSTALLINE TITANIUM-DIOXIDE NATURAL ORGANIC-MATTER TITANATE NANOTUBES AQUEOUS-SOLUTION ALKALI TREATMENT OXIDE ADSORBENT TIO2 NANOTUBES IONIC-STRENGTH REMOVAL NANOPARTICLES
DOI	10.1016/j.jcis.2014.10.036
英文摘要	Arsenate adsorption onto Fe2O3 was highly restricted at acidic condition due to dramatic dissolution. To overcome this difficulty, iron oxide nanoparticle-grafted titanate nanotubes (Fe-TNTs) were synthesized by a facile one-step water-ethanol hydrothermal method and used to remove As(V) from aqueous solutions. This new adsorbent was acid-resistant, and showed a large As(V) adsorption capacity of 90.96 mg/g determined by two-site Langmuir model, which was almost 3 times of the original TNTs. Fe2O3 was proved to bonded to the surface of TNTs by TEM and XRD analysis and synergy of Fe2O3 and TNTs was of great help to excellent As(V) adsorption. Load of Fe2O3 greatly enhanced the point of zero charge. Moreover, tubular TNTs not only inhibited dissolution of Fe2O3 at low pH, but also maintained good sedimentation property. The hydroxyl groups on Fe-TNTs surface played the most important role in As(V) adsorption. Electrostatic interaction followed by complexation was confirmed to be the primary adsorption mechanism by means of XPS analysis. Desorption capability and reuse performance of Fe-TNTs were also investigated, and satisfactory As(V) adsorption was further found with NaOH desorbed even after three reuse cycles. (C) 2014 Elsevier Inc. All rights reserved.; Chemistry, Physical; SCI(E); EI; PubMed; 0; ARTICLE; nijinren@iee.pku.edu.cn; 253-262; 440
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158748]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Wang, Yanqi,Liu, Wen,Wang, Ting,et al. Arsenate adsorption onto Fe-TNTs prepared by a novel water-ethanol hydrothermal method: Mechanism and synergistic effect[J]. 胶体与界面科学杂志,2015.
APA	Wang, Yanqi,Liu, Wen,Wang, Ting,&Ni, Jinren.(2015).Arsenate adsorption onto Fe-TNTs prepared by a novel water-ethanol hydrothermal method: Mechanism and synergistic effect.胶体与界面科学杂志.
MLA	Wang, Yanqi,et al."Arsenate adsorption onto Fe-TNTs prepared by a novel water-ethanol hydrothermal method: Mechanism and synergistic effect".胶体与界面科学杂志 (2015).