Effect Of Calcination Temperature On The Morphology Of Plating Sludge

Abstract

The effect of calcination temperature on the morphology of plating sludge generated from waste water treatment plant was studied. This waste was hazardous waste due to high toxic metal content [1]. It must be recovered, reuse or recycled before the process but its properties should determined in order to decide recovery method [2]. Previous researches were shown that this kind of wastes were used in different industries such as ceramic, glass, pigment, etc., at this point, its behavior against to heat was very important to decide the suitable recovery method [3,4,5]. In this study, the sludge was dried and calcined for 3 hours at temperatures ranging from 650 to 1200 degrees C. Phase transformation of the calcined powders has been investigated as a function of calcination temperature by room-temperature X-ray diffraction and scanning electron microscopy techniques. With increasing calcining temperature, metal oxides were formed cubic spinel phase (ZnCr2O4) with calcium iron phosphate.