Strong adsorption of phosphate by amorphous zirconium oxide nanoparticles
Y. Su; H. Cui; Q. Li; S. A. Gao; J. K. Shang
Source PublicationWater Research
AbstractPhosphate removal is important in the control of eutrophication of water bodies. Adsorption is one of the promising approaches for the removal of phosphate, which could serve as a supplement for the biological phosphate removal process commonly used in the wastewater treatment industry to meet the discharge requirement when the biological performance is deteriorated from changes of operation conditions. Amorphous zirconium oxide nanoparticles were synthesized by a simple and low-cost hydrothermal process, and their phosphate removal performance was explored in aqueous environment under various conditions. A fast adsorption of phosphate was observed in the kinetics study, and their adsorption capacity was determined at about 99.01 mg/g at pH 6.2 in the equilibrium adsorption isotherm study. Commonly coexisting anions showed no or minimum effect on their phosphate adsorption performance. The phosphate adsorption showed little pH dependence in the range from pH 2 to 6, while it decreased sharply with the pH increase above pH 7. After adsorption, phosphate on these am-ZrO2 nanoparticles could be easily desorbed by NaOH solution washing. Both the macroscopic and microscopic techniques demonstrated that the phosphate adsorption mechanism of am-ZrO2 nanoparticles followed the inner-sphere complexing mechanism, and the surface hydroxyl groups played a key role in the phosphate adsorption. (C) 2013 Elsevier Ltd. All rights reserved.
description.department[su, yu ; cui, hang ; li, qi ; gao, shian ; shang, jian ku] chinese acad sci, inst met res, shenyang natl lab mat sci, environm funct mat div, shenyang 110016, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa. ; li, q (reprint author), 72 wenhua rd, shenyang 110016, liaoning provin, peoples r china. ;
KeywordEutrophication Phosphate Removal Amorphous Zro2 Nanoparticles Adsorption Inner-sphere Complexing Mechanism Situ Preconcentration Method Phosphorus Removal Aqueous-solution Waste-water Adsorbent Eutrophication Hydroxide Wastewaters Technology Desorption
Document Type期刊论文
Recommended Citation
GB/T 7714
Y. Su,H. Cui,Q. Li,et al. Strong adsorption of phosphate by amorphous zirconium oxide nanoparticles[J]. Water Research,2013,47(14):5018-5026.
APA Y. Su,H. Cui,Q. Li,S. A. Gao,&J. K. Shang.(2013).Strong adsorption of phosphate by amorphous zirconium oxide nanoparticles.Water Research,47(14),5018-5026.
MLA Y. Su,et al."Strong adsorption of phosphate by amorphous zirconium oxide nanoparticles".Water Research 47.14(2013):5018-5026.
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