Preface - kmutt

116
for Hg 2+ with a mean residence time of 87 ps,
whereas several water exchange processes were
found between the second hydration shell and
the bulk for all metal ions. For water exchange
processes between the second hydration shell
and the bulk, the mean residence time of 10 ps
for Cd 2+ is nearly the same as that observed for
Hg 2+ (13 ps), whereas the values of 22 ps and 55
ps were evaluated for Cr 3+ and Co 3+ ,
respectively.
IC-117 DETERMINATION OF CHROMIUM,
MANGANESE, CADMIUM AND LEAD IN
SEAFOODS BY FLAME ATOMIC
ABSORPTION SPECTROSCOPY
Greeta Mathap, Burin Limchawfar,
Surasak Sujaritvanichapong
The 11 th Asian Chemical Congress (11th ACC),
August 24-26, 2005, Korea University, Seoul,
Korea
This research undertook the quantitative
study of chromium, manganese, cadmium and
lead in seafoods e.g. cockle, sea mussel, sea
crab and white bass from coastal areas
in Bangkoontein, Bangkok, Pak Klong
Mahachai, Samutsakorn and Bangprakong
Rivers in Thailand by Flame Atomic Absorption
Spectroscopy. It was found that chromium
content in cockle, sea mussel, sea crab and white
bass was 1.14 - 1.52 mg/kg, 1.16 - 1.23 mg/kg,
0.69 - 1.14 mg/kg and 0.59 - 0.93 mg/kg,
respectively. Manganese in cockle, sea mussel,
sea crab and white bass was 9.83 - 11.29 mg/kg,
12.81 - 15.27 mg/kg, 16.22 - 18.04 mg/kg and
0.11 - 0.062 mg/kg, respectively. Cadmium in
cockle, sea mussel, sea crab and white bass was
1.46 - 2.04 mg/kg, 0.11 – 0.26 mg/kg, 0.15 -
0.31 mg/kg and 0.06 - 0.15 mg/kg, respectively.
Lead in cockle, sea mussel, sea crab and white
bass was 0.34 - 1.56 mg/kg, 0.62 - 1.42 mg/kg,
0.39 - 0.65 mg/kg and 0.34 - 0.70 mg/kg,
respectively. The precision of the analysis was
in the range of standard deviation form ± 0.003
to ± 0.001, The relative standard deviation was
in the range of ± 0.001 to ± 0.0100. The results
show that the heavy metals in cockle, sea
mussel, sea crab are more than those in white
bass. Especially, cadmium in cockle is more
than the Thai Ministry of Health standard limit
(found 1.46 - 2.04 mg/kg, standard limit 1
mg/kg).
IC-118 REMOVAL OF ACRIDINE ORANGE
KMUTT Annual Research Abstracts 2005
DYE FROM AQUEOUS SOLUTIONS USING
POLY(AMINOSTYRENE)
Withawat Mingvanish, Benchang Sangchakr,
Suwanna Faktim, Pannipa Kamsathon
The 11 th Asian Chemical Congress (11th ACC),
August 24-26, 2005, Korea University, Seoul,
Korea, p. 294
The use of poly(aminostyrene) as
sorbent of Acridine Orange dye from aqueous
solutions was studied. The effect of contact time,
initial pH of the solution and dye concentration
on the sorption were established. The
concentration of dye solution remaining at
equilibrium was measured by UV-Visible
spectroscopy at the wavelength of 491 nm. The
experimental data was described by Langmuir
isotherm with a high correlation coefficient.
IC-119 KINETICS OF COPPER(II) AND
ZINC(II) ADSORPTION ON
POLY(AMINOSTYRENE)
Benchang Sangchakr,
Kwan Thumrongwonggawin,
Wirote Kaewkamphonkul, Withawat Mingvanish
The 11 th Asian Chemical Congress (11th ACC),
August 24-26, 2005, Korea University, Seoul,
Korea, p. 346
Kinetics and mechanism of adsorption
of copper(II) and zinc(II) from aqueous
solutions using poly(aminosytrene) were studied
in the temperature range 303-348 K. Two
simplified kinetic models, pseudo first- and
second-order equations were tested. It was
shown that the adsorption of both metal ions
could be described by the pseudo second-order
equation. Rate constants of the best-fit model
were calculated and the related apparent
activation energies were also evaluated and
discussed.
IC-120 PREPARATION OF MICROPOROUS
NUCLEAR TRACK ETCHED MEMBRANE
FROM THIN POLYCARBONATE FILM
Apaporn Thongphud, Wichian Ratanatongchai,
Benchang Sangchakr, Pinpan Visal-thaphand
The 3 rd Regional Symposium on Membrane
Science & Technology, April 26-27, 2005,
Institut Teknologi Bandung, Indonesia
Microporous nuclear track etched
International Conference