TITLE:
Removal of Fe3+ from Aqueous Solution by Natural Apatite
AUTHORS:
Gongming Qian, Maolin Li, Fei Wang, Xinggang Liu
KEYWORDS:
Adsorbent; Iron Removal; Apatite; Adsorption Isotherm
JOURNAL NAME:
Journal of Surface Engineered Materials and Advanced Technology,
Vol.4 No.1,
January
16,
2014
ABSTRACT: The
feasibility of natural apatite for adsorptive removal of Fe3+ from
aqueous solution was investigated. Batch experiments were performed as function
of process parameters such as contact time, initial concentration of Fe3+,
temperature, apatite dosage and pH. The natural apatite exhibited a high
performance for the removal of Fe3+ from aqueous solution. The pH
value clearly affects the removal mechanism of Fe3+ by natural
apatite. At low pH value, dissolution/precipitation is the main effect. The
effect of hydrolyzation increased with the pH value. After the pH value above
5.0, hydrolyzation is the main effect. The adsorption isotherms demonstrated that
the adsorbent behaved in a favorable manner for Fe3+ adsorption. The
experimental data were well fitted with Langmuir isotherm.