Citation: YANG Ying-Li, YAN Xin-Long, HU Xiao-Yan, ZHOU Min. Zn/Al Hydrotalcite with Different n_Zn/n_Al Molar Ratios:Synthesis and Phthalic Acid Adsorption Behaviour[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(10): 1748-1756. doi: 10.11862/CJIC.2017.232 shu

Zn/Al Hydrotalcite with Different n_Zn/n_Al Molar Ratios:Synthesis and Phthalic Acid Adsorption Behaviour

School of Chemical Engineering & Technology, Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

Corresponding author: YAN Xin-Long, yanxl@cumt.edu.cn
Received Date: 12 April 2017
Revised Date: 30 August 2017

Figures(10)

Zn-Al layered double hydroxides (LDHs) with different Zn/Al molar ratios were prepare by co-preci-pitation method in this work. The structure and composition were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), thermogravimetric (TG), N₂ adsorption-desorption and inductively coupled plasma mass spectrometry (ICP-MS). The adsorption properties of as-prepared Zn/Al hydrotalcites for phthalic acid removal from water were investigated and compared. Results show that the adsorption capacity increased with the increasing of Zn/Al molar ratios at low Zn/Al molar ratios for hydrotalcites. Further increasing the n_Zn/n_Al molar ratios (>6), the adsorption capacity shows little change. Among those hydrotalcites, one sample with the highest adsorption capacity was selected and its adsorption kinetic and isotherm was further investigated. The adsorption equilibrium data were well described by Freundlich isotherm model and the kinetics followed a pseudo-second order kinetic equation/mechanism. In addition, the hydrotalcite can be reused at least 3 cycles without significant loss of adsorption capacity.
- hydrotalcite,
- Zn/Al molar ratios,
- adsorption and separation,
- phthalic acid,
- adsorption kinetics,
- adsorption thermodynamics
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Zn/Al Hydrotalcite with Different nZn/nAl Molar Ratios:Synthesis and Phthalic Acid Adsorption Behaviour

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通讯作者: 陈斌, bchen63@163.com

Zn/Al Hydrotalcite with Different n_Zn/n_Al Molar Ratios:Synthesis and Phthalic Acid Adsorption Behaviour