Preparation and characterization of biomimetic adsorbent frompoly-3-hydroxybutyrate
Xiaoxuan Zhang , Chaohai Wei , Qincong He , Yuan Ren
DOI:
Received September 24, 2009,Revised October 12, 2009, Accepted , Available online
Volume 22,2010,Pages 1267-1272
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Biomimetic adsorbent named as PHBBMA was prepared from lipophilic poly-3-hydroxybutyrate (PHB) by a modified double emulsion
solvent evaporation method. PHBBMA, characterized by using scanning electron microscope and nitrogen adsorption/desorption
measurements, is porous spherical particles. The characterization with the thermal gravimetric analysis and di erential scanning
calorimetry, 1H nuclear magnetic resonance and Fourier transform infrared spectroscopy showed that PHBBMA preparation was
a physical process without chemical reaction. The adsorption of PHBBMA for o-nitrochlorobenzene (o-NCB) was fitted better by
Langmuir model than by Freundlich model, while the pseudo second-order model fitting was better than the pseudo first-order model
fitting. The maximal adsorption capacity of PHBBMA for o-NCB was 57.83 mg/g at 30°C, although its specific surface area (SBET)
was only 8.45 m2/g. PHBBMA is a safe and environmental friendly adsorbent with high adsorption capacity because its component is
innocuous and biodegradable PHB produced reusing wastes and contaminants, no byproduct can produced, and its ester and hydrocarbyl
groups have strong a nity with organochlorine compounds. The further work will focus on the modification and improvement of
PHBBMA in order to increase its SBET and adsorption capacity.
