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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 12, No. 8, 2015, pp. 2731-2740
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Bioline Code: st15256
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 12, No. 8, 2015, pp. 2731-2740
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A comparative study on tetracycline sorption by Pachydictyon coriaceum and Sargassum hemiphyllum
Li, W. C. & Wong, M. H.
Abstract
This study compared the biosorption of tetracycline,
an antibiotic commonly used to treat bacterial
infections, in aqueous solution under various conditions
using two brown seaweeds commonly found in Hong Kong
waters—Pachydictyon coriaceum and Sargassum hemiphyllum.
Two environmental effects (temperature and
shaking speed) and two chemical effects (pH and salinity)
were investigated to determine the optimal conditions for
sorption of tetracycline by biomass. It was found that the
maximum biosorption capacity (qmax) of tetracycline by the
two types of seaweed was generally higher at lower temperature
(15 °C) and higher shaking speed (250 rpm). The
sorption performances of P. coriaceum and S. hemiphyllum
were better in slightly acidic solution (pH 3), with qmax
around 9 mg/g for P. coriaceum. Higher salinity (100 mM
NaCl) reduced the sorption ability of both brown seaweeds
by reducing the solubility of the aqueous tetracycline. It
was found that S. hemiphyllum could tolerate and had
higher sorption in a slightly saline solution (50 mM NaCl),
while P. coriaceum performed better without the presence
of NaCl. This study provides crucial information for
achieving optimal sorption of aqueous tetracycline using P.
coriaceum over S. hemiphyllum as an effective biomass for
removing antibiotics in wastewater.
Keywords
Biosorption; Sargassum hemiphyllum; Pachydictyon coriaceum; Antibiotic
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