Title :
Removal of Fe (II) and Mn (II) from Aqueous Solution by Palygorskite
Author :
Lin, Shaohua ; He, Huijun ; Zhang, Rui ; Li, Jierui
Author_Institution :
Coll. of Civil Eng., Nanjing Forestry Univ., Nanjing, China
Abstract :
Adsorption properties of Fe(II) and Mn(II) by palygorskite were investigated using a batch adsorption, and the effects of contact time, roasting temperature and acid concentration for activation on adsorption removal of Fe(II) and Mn(II) were studied. Results showed that the adsorption sites of palygorskite were well exposed to both kinds of metal ions, and the equilibrium adsorption was reached within a very short period. Adsorption of Fe(II) followed the Langmuir isotherm model fairly well, while adsorption of Mn(II) fitted the Freundlich isotherm model fairly well. Mercury porosimeter analysis indicated that heat-treatment at 500°C resulted in degradation of channel structure and adsorption capacity loss of palygorskite.With increasing HCl concentration of acid treating solution, adsorption capacities for Fe(II) and Mn(II) decreased firstly and then increased, the minimum was obtained at 5 mol/1 and 4 mol/1 of HCl concentration for Fe(II) and Mn(II) respectively.
Keywords :
adsorption; chemical engineering; heat treatment; hydrogen compounds; iron; manganese; porosity; wastewater treatment; water pollution; Freundlich isotherm model; Langmuir isotherm model; acid concentration; acid treating solution; batch adsorption; channel structure degradation; heat-treatment; iron removal; manganese removal; mercury porosimeter analysis; palygorskite; roasting temperature; Chemicals; Ions; Iron; Manganese; Temperature; Water pollution; adsorption; ferrous removal; manganese removal; palygorskite;
Conference_Titel :
Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM), 2011 International Conference on
Conference_Location :
Changsha
Print_ISBN :
978-1-61284-278-3
Electronic_ISBN :
978-0-7695-4350-5
DOI :
10.1109/CDCIEM.2011.341
