Environmental catalysis and materials

Preparation and characterization of biomimetic adsorbent frompoly-3-hydroxybutyrate

Xiaoxuan Zhang , Chaohai Wei , Qincong He , Yuan Ren


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.

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