Citation: JIAN Yuan, MU Wan-Jun, LIU Ning, PENG Shu-Ming. Removal of Sr²⁺ Ions by Ta-Doped Hexagonal WO₃: Zeta Potential Measurements and Adsorption Mechanism Determination[J]. Acta Physico-Chimica Sinica, ;2016, 32(8): 2052-2058. doi: 10.3866/PKU.WHXB201604213 shu

Removal of Sr²⁺ Ions by Ta-Doped Hexagonal WO₃: Zeta Potential Measurements and Adsorption Mechanism Determination

JIAN Yuan ^1,2, ,
MU Wan-Jun ² ,
LIU Ning ¹ ,
PENG Shu-Ming ^1,2

1.
Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, P. R. China;
2.
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, P. R. China

Received Date: 29 February 2016
Revised Date: 20 April 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21501159).

The adsorption of Sr²⁺ ions onto Ta-doped hex-WO₃ nanomaterials was studied by measuring the zeta potentials of the powder nanoparticles and by determining the adsorption isotherm and adsorption mechanism. Five important results were obtained: (1) the zeta potential values of the Ta-doped hex-WO₃ suspensions in different electrolyte solutions, within the studied pH ranges, increased with an increase in electrolyte valence; and (2) the zeta potential of the Ta-doped hex-WO₃ suspensions increased with an increase in ionic strength. (3) Sr²⁺ ion adsorption increased with a decrease in temperature and ionic strength. (4) The adsorption enthalpy was calculated as －47 kJ·mol^-1, and the interaction between the Ta-doped hex-WO₃ surface and Sr²⁺ ions was concluded to be chemical in nature. (5) The adsorption of Sr²⁺ ions onto the Ta-doped hex-WO₃ was attributed to surface chemical adsorption and ion exchange (in tunnels).
- Ta,
- hex-WO₃,
- Zeta potential,
- Sr²⁺,
- Adsorption mechanism
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沈阳化工大学材料科学与工程学院沈阳 110142

Removal of Sr2+ Ions by Ta-Doped Hexagonal WO3: Zeta Potential Measurements and Adsorption Mechanism Determination

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通讯作者: 陈斌, bchen63@163.com

Removal of Sr²⁺ Ions by Ta-Doped Hexagonal WO₃: Zeta Potential Measurements and Adsorption Mechanism Determination