Preparation and performance of a composite mineral ceramic material for decolorization of dyeing wastewater

Key words: 
• natural minerals /
• ceramic /
• dyeing and printing wastewater /
• decolorization

Abstract: Dyeing wastewater, as a main source of water pollution, is difficult and urgent to be properly treated at present. Natural minerals can effectively remove dye pollutants via adsorption, photocatalytic degradation processes. In order to develop novel environmental mineral material, some natural minerals as raw materials, composite ceramic material was synthesized with a mix-granulate-calcine process. For the new ceramic material, the decolorization capability to the dyes (acid blank 10B, direct blending blue D-3GL) was investigated through quantitative research and batch experiments. Results showed that the decolorization rate of both wastewater could reach more than 95% under the optimum condition, 8 g/L dosage, 12 h reaction time, and pH 2~8. After being calcinated at 800℃ for 15 min，the material could be regenerated. Besides, the characteristics of the material showed that the material had apparent micropore structure, high mechanical strength and low dissipation rate. It demonstrated that the process was an effective solution to the problems of the separation of mushy stage.