Comparison of Surface-Modified Adsorbents for Phosphate Removal in Water

Title
Comparison of Surface-Modified Adsorbents for Phosphate Removal in Water
Authors
최재우이상협이승연김지은박기영김동주홍석원
Keywords
Sulfate coated; Zeolite; Hydrotalcite; Activated alumina; Phosphate
Issue Date
2012-07
Publisher
Water, air, and soil pollution
Citation
VOL 223, NO 6, 2881-2890
Abstract
Three novel composite adsorbents, sulfate coated zeolite (SCZ), hydrotalcite (SCH) and activated alumina (SCAA), were characterized and employed for the removal of phosphate from aqueous solution using equilibrium and kinetic batch experiments. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction spectrum (XRD) were used to study the surface characteristics of the coated layer. Equilibrium tests showed that the adsorption of phosphate followed both Langmuir and Freundlich isotherms. The powder type sulfate coated zeolite was better for phosphate removal (maximum binding energy, = 111.49 mg g-1) compared to hydrotalcite and activated alumina. The adsorption of phosphate was considered to take place mainly by ion exchange. The kinetic data followed a pseudo-second-order kinetic model. The initial adsorption of phosphate onto the sulfate coated adsorbents was fast, indicating that the sulfate coated materials developed in this study can be used as promising adsorbents for the removal of phosphate from wastewater or sewage.
URI
http://pubs.kist.re.kr/handle/201004/41428
ISSN
0049-6979
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE