Designing a Technology of Industrial Sewage Waters Purification from the Spent Polishing Powder Based on Ceric Oxide

The primary activity of an enterprise, where the wastewater samples have been taken, is applying lacquer coatings to glass and the mirrors production. For washing glass before the application of coatings a suspension of powder based on ceric oxide is prepared, which is used as a polishing solution. The physical and chemical properties of industrial sewage waters, generated after glass polishing, and of the initial and spent polishing powder based on ceric oxide have been researched. The optimal doses of flocculating agents for purifying wastewaters in order to reduce turbidity, suspended solids concentration and dry residue have been determined. After the flocculation the advanced treatment of the water was done, by means of filtering elements with pore size 5 and 1 μm, produced by the Pentek Company. The process scheme of wastewater purification, including the physico-chemical method (flocculation) and mechanical purification method by using bag filters, has been developed.

Influence of Different Ceric Oxide and Ferric Oxide Content on the Color of Alumina-Glass-Composites Restoration

This study aims to investigate the effects of ceric oxide and ferric oxide on the color of alumina-glass-composite (AGC). Uncolored glass and colored glass powder with 4% ceric oxide and 0.5% ferric oxide were fabricated. Primary mixture powder were made by mixing the two colored glass powder with 0.1g interval, and then 81 kinds of colored mixture powder were gained by mixing uncolored powder with the primary mixture powder. Molten glass was infiltrated into presintered alumina blocks. The colored AGC and VITAPAN-3D-MASTER shade guide were measured with spectrophotometer. Experiment results showed that the Yxy value of VITAPAN-3D-MASTER shade guide distributed from (185,0.378,0.340) to (121,0.443,0.341) and the Yxy value of colored AGC distributed from (227,0.352,0.343) to (102,0.489,0.364). There were 37 kinds of samples in the color range of shade guide. The color range of 81 kinds of AGC covered that of the VITAPAN-3D-MASTER shade guide.