Preface - kmutt

KMUTT Annual Research Abstracts 2005
sorption performances for a geosmin removal by
sorption onto granular activated carbons (GAC)
manufactured from different raw materials of
coconut shell and bituminous coal. The surface
of GAC was modified by chitosan coating. The
90% deacetylated chitosan flakes were used to
coated on GAC with the GAC:chitosan ratio of
5:1. The surface of GAC was characterized by
scanning electron microscope (SEM) analysis,
fourier transform infrared spectroscopy and
measurement of the pH solution. The sorption of
geosmin onto the chitosan for both uncoated and
coated GACs could be described by the
Freundlich adsorption model. Data revealed that
the sequence of geosmin sorption was chitosan
coated bituminous coal > uncoated bituminous
coal > coated coconut shell > uncoated coconut
shell. The bituminous coal based GAC with
chitosan coating had a maximum capacity of
23.57 µg/g which was about two fold of
uncoated bituminous coal based GAC. Two
simplified kinetic models, pseudo-first order and
pseudo-second order, were tested to investigate
the sorption mechanisms. It was found that the
intraparticle diffusion was a rate controlling step
for the sorption and followed the pseudo-second
order equation.
IC-224 SYNTHESIS OF STYRENE-
DIVINYLBENZENE COPOLYMERS ON
COTTON CELLULOSE:
CHARACTERIZATION AND APPLICATION
FOR CATION REMOVAL IN FRESHWATER
Set Siriwat, Soydoa Vinitnantharat,
Chanchai Thongpin
The 1 st International Water Association - Asia
Pacific Regional Group Conference and
Exhibition (IWA-ASPIKE), July 10-15, 2005,
Pan Pacific Hotel, Singapore
The aim of this work is to synthesis and
develop the strong acid exchanger on the natural
cellulose for the cation removal in freshwater.
Crosslinked cation exchange resin bearing
acylating sulfonic acid group was prepared by
photo radiation-induced grafting of styrene
containing crosslinker as divinylbenzene onto
cotton cellulose followed by Friedel-Crafts
acylation and Sulfoacylation reactions. The
reaction temperatures in the range of 30-60 °C
including reaction times of 4-6 h were
investigated to select the optimum condition.
The physical and chemical characteristics of the
synthesized samples were compared to a
153
commercial styrene -divinylbenzene copolymer
bed. As for the studies, the physical
characteristics were observed by using the
Scanning Electron Microscope (SEM). After
the Friedel-Crafts reactions and Sulfoacylation
of the synthesized samples, the chemical
characteristics were investigated by using
instrumental techniques namely
Thermogravimetric analysis (TGA), Fourier
Transform Infrared Spectrometer (FTIR) and
hardness titration. However, more investigations
are needed in order to comprehensive samples
and commercial ion exchange resin. Then, the
exchange resin samples were used to test the
exchangeable cation of Ca 2+ , Mg 2+ and Fe 2+ of
which concentrations 400, 1000 mg/1 as CaCO 3
and 15 mg Fe/1, respectively.
IC-225 A BATCH TESTS FOR ASSESSING
DECOLORIZATION AND KINETIC OF
REACTIVE DYES BY GRANULATED
ANAEROBIC MIXED CULTURE
Sunantha Laowansiri, Soydao Vinitnantharat,
Pawinee Chaiprasert, Sung Ryong Ha
The International Conference on Quantitative
Methods for the Environmental Sciences and
General Meeting of the International
Environmetrics Society, August 22-26, 2005,
Friendship Hotel, Beijing, China, pp. 107-117
Most of published studies have
considered adding carbon sources to wastewater
to affect the degradation and kinetics of dyes,
but in the normally textile process has the sizing
agents as the carbon source. Therefore, the aim
of this study was to investigate the rate of
decolorization and biological kinetics of dyes by
partially granulated anaerobic mixed culture
from an upflow anaerobic sludge blanket
(UASB) reactor. The partial granulated
anaerobic mixed culture (1.8 g MLVSS l -1 ) was
used to investigate the treatability of two diazo
dyes, reactive red 120 (RR 120) and reactive red
141(RR 141) in different carbon sources, dye
concentrations and COD in batch test
experiments with an incubation time of 324
hours. Three sizing agents, modified starch
(MS), polyvinyl alcohol (PVA) and acrylic size
(AS), were used as a carbon sources
concentrations varying in the range of 400-1600
mg COD l -1 and color concentrations of 20,40
and 60 mg l -1 . The removal efficiencies and
biological kinetics were evaluated. Results
revealed that increasing dye concentration could
International Conference