TITLE:
Effect of Non-Thermal Plasma Modified NiAl Layered Double Hydroxides on the Removal of Fluoride from Aqueous Solution
AUTHORS:
Hongxiao Lu, Qiurong Li, Haiyan Xiao, Ranran Wang, Danyang Xie
KEYWORDS:
Adsorption, NiAl Layered Double Hydroxides, Non-Thermal Plasma, Fluoride
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.5 No.9,
June
20,
2014
ABSTRACT: In this paper, NiAl layered double hydroxides (NiAl-LDHs) has been modified by non-thermal plasma (NTP) to enhance the fluoride removal capacity of materials. The samples were characterized by X-ray diffraction, Fourier transform infrared spectrometer (FTIR), Thermogravimetric differential thermal analyzer (TG-DTA) and N2 adsorption-desorption. Effects of pH, co-existing anions, temperature and kinetics on F﹣ adsorption were investigated. The results showed that pH affects the adsorbent surface charge. The effective pH range for F﹣ removal was between 4.5 and 10. Lower pH potentially causes dissolution of NiAl-LDHs. The negligible interference of coexisting ions such as makes the NiAl-LDHs a promising sorbent for fluoride polluted water treatment.