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[Ammonium Adsorption Characteristics in Aqueous Solution by Titanate Nanotubes].
Huan Jing Ke Xue. 2019 Jul 08; 40(7):3135-3145.HJ

Abstract

Titanate nanotubes (TNTs) were synthesized via a hydrothermal method using P25 and NaOH as the raw materials. The composition and morphology of the nanotubes were characterized by X-ray diffraction and transmission electron microscopy. The adsorption characteristics and the rules of ammonium in aqueous solutions were tested in the static system. The results showed that when the alkali concentration was 10 mol·L-1, titanate nanotubes with a length of approximately 120 nm and a diameter of approximately 8 nm were obtained. The equilibrium adsorption capacity of ammonium was 10.67 mg·g-1. When the pH ranged between 3 and 8, TNTs effectively adsorbed ammonium. The equilibrium adsorption time was 1 h, and this followed the pseudo second-order model. The results from the intra-particle model also showed that the adsorption process of ammonium by TNTs was controlled by surface adsorption and inter-particle diffusion. The Temkin model gave the best fit for the adsorption of ammonium onto TNTs. The thermodynamic experiments showed that the adsorption of titanate nanotubes on ammonium was a spontaneous endothermic process. Coexisting anions and cations had an inhibitory effect on the adsorption of ammonium. The order of influence was SO42- > Cl- > H2PO4- and K+ > Na+ > Ca2+, respectively. The adsorption effect of ammonium by regenerated TNTs remained more than 88.64% after five repeat usages. The results of Fourier transform infrared spectroscopy showed that the ammonium adsorption mechanism of titanate nanotubes was ion-exchange between NH4+ and Na+ in the TNTs. Titanate nanotubes can effectively remove ammonium from water because of their good recycling capacity and large adsorption capacity.

Authors+Show Affiliations

Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.Jiangsu Engineering and Research Center of Food Safety, School of Engineering and Technology, Jiangsu Institute of Commerce, Nanjing 210007, China.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.

Pub Type(s)

English Abstract
Journal Article

Language

chi

PubMed ID

31854711

Citation

Zhang, Zheng, et al. "[Ammonium Adsorption Characteristics in Aqueous Solution By Titanate Nanotubes]." Huan Jing Ke Xue= Huanjing Kexue, vol. 40, no. 7, 2019, pp. 3135-3145.
Zhang Z, Feng CS, Zhang XR, et al. [Ammonium Adsorption Characteristics in Aqueous Solution by Titanate Nanotubes]. Huan Jing Ke Xue. 2019;40(7):3135-3145.
Zhang, Z., Feng, C. S., Zhang, X. R., Jia, J. K., Jiang, C. Y., Li, P. J., & Wang, Y. P. (2019). [Ammonium Adsorption Characteristics in Aqueous Solution by Titanate Nanotubes]. Huan Jing Ke Xue= Huanjing Kexue, 40(7), 3135-3145. https://doi.org/10.13227/j.hjkx.201812085
Zhang Z, et al. [Ammonium Adsorption Characteristics in Aqueous Solution By Titanate Nanotubes]. Huan Jing Ke Xue. 2019 Jul 8;40(7):3135-3145. PubMed PMID: 31854711.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Ammonium Adsorption Characteristics in Aqueous Solution by Titanate Nanotubes]. AU - Zhang,Zheng, AU - Feng,Chang-Sheng, AU - Zhang,Xiao-Rui, AU - Jia,Jian-Kui, AU - Jiang,Cai-Yun, AU - Li,Pan-Jie, AU - Wang,Yu-Ping, PY - 2019/12/20/entrez PY - 2019/12/20/pubmed PY - 2019/12/20/medline KW - Titanate nanotubes KW - adsorption KW - adsorption mechanism KW - ammonium KW - kinetics SP - 3135 EP - 3145 JF - Huan jing ke xue= Huanjing kexue JO - Huan Jing Ke Xue VL - 40 IS - 7 N2 - Titanate nanotubes (TNTs) were synthesized via a hydrothermal method using P25 and NaOH as the raw materials. The composition and morphology of the nanotubes were characterized by X-ray diffraction and transmission electron microscopy. The adsorption characteristics and the rules of ammonium in aqueous solutions were tested in the static system. The results showed that when the alkali concentration was 10 mol·L-1, titanate nanotubes with a length of approximately 120 nm and a diameter of approximately 8 nm were obtained. The equilibrium adsorption capacity of ammonium was 10.67 mg·g-1. When the pH ranged between 3 and 8, TNTs effectively adsorbed ammonium. The equilibrium adsorption time was 1 h, and this followed the pseudo second-order model. The results from the intra-particle model also showed that the adsorption process of ammonium by TNTs was controlled by surface adsorption and inter-particle diffusion. The Temkin model gave the best fit for the adsorption of ammonium onto TNTs. The thermodynamic experiments showed that the adsorption of titanate nanotubes on ammonium was a spontaneous endothermic process. Coexisting anions and cations had an inhibitory effect on the adsorption of ammonium. The order of influence was SO42- > Cl- > H2PO4- and K+ > Na+ > Ca2+, respectively. The adsorption effect of ammonium by regenerated TNTs remained more than 88.64% after five repeat usages. The results of Fourier transform infrared spectroscopy showed that the ammonium adsorption mechanism of titanate nanotubes was ion-exchange between NH4+ and Na+ in the TNTs. Titanate nanotubes can effectively remove ammonium from water because of their good recycling capacity and large adsorption capacity. SN - 0250-3301 UR - https://www.unboundmedicine.com/medline/citation/31854711/[Ammonium_Adsorption_Characteristics_in_Aqueous_Solution_by_Titanate_Nanotubes] DB - PRIME DP - Unbound Medicine ER -
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