Examination and Evaluation of Oyster Shell Utilization with Rice Husk Biochar for Phosphorus Adsorption

Calcium (Ca)-loaded biochar was produced from rice husks by loading the Ca source with subsequent carbonization and examined evaluation of P adsorption capability about method, availability oyster shells as alternative, effect temperature. Ca-loaded prepared at 650°C had CaCO3 form, that 400°C unconverted Ca(OH)2 less CO2 generation. Moreover, silicon in might have existed an amorphous structure calcium silicate hydrate reacting Ca. As method source, powder mixing effective conventional impregnation method. It clarified can be used decarboxylation hydration chemical form is important for improving capability. Furthermore, condition could performed paddy field location higher than 650°C, even though pores were not developed. The formation low-temperature affected improvement