Short Communication: Recycling wasted biomaterial, crab shells, as an adsorbent for the removal of high concentration of phosphate

In this study, crab shells were recycled as an adsorbent for the removal of phosphate. The effects of shell particle size, temperature, pH and phosphate concentration on phosphate removal were investigated. Shell particles less than 1000 mm in diameter removed more than 85% of 500 mg/L phosphate in...

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Published in:Bioresource technology 2009-05, Vol.100 (9), p.2646-2649
Main Authors: Jeon, Dong Jin, Yeom, Sung Ho
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Language:English
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Decapoda
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description In this study, crab shells were recycled as an adsorbent for the removal of phosphate. The effects of shell particle size, temperature, pH and phosphate concentration on phosphate removal were investigated. Shell particles less than 1000 mm in diameter removed more than 85% of 500 mg/L phosphate in 24 h while particles 3350 mm in diameter exhibited only 50% removal efficiency. Temperature showed negligible effect on phosphate removal in the range of 15-45 °C. Although removal efficiency was highest at pH 2.0, the efficiency remained 50-60% at pH of 4.0-10.0. The maximum removal capacity was calculated as 108.9 mg/g through Langmuir isotherm plotting, which was 17.0 and 4.7 times higher than those of coal fly ash and scallop shells, respectively. Although calcium carbonate played an active role in the removal of phosphate, both proteins composing 12.5% of crab shells and cellulose-like backbone of the crab shells also played an important role in phosphate removal.
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title Short Communication: Recycling wasted biomaterial, crab shells, as an adsorbent for the removal of high concentration of phosphate
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