Natural Mineral Composite Ceramic Materials, And Printing And Dyeing Wastewater

Dyeing wastewater, as a main source of water pollution, is difficult and urgent to be properly treated at present. Its esistence influences the sustainable development of textile dyeing and printing industry and pose a threat to the human survival environment.In our country,6～7 million tons of printing and dyeing wastewater was discharged into the water environment yearly. Printing and dyeing wastewater, with large amount of water, high organic contaminant content, much refractory compound, high chroma, complicated components, and so on, results that it is hardly to find effective printing and dyeing wastewater disposal route for a long time. All of them have an extremely threaten to water quality security of our country.Therefore, resolving the printing and dyeing wastewater staining problem is imperatived under the situation. And reserrching and developing new and effective decolorization material to printing and dyeing wastewater is one of the efficient pathes.At present, bleaching methods mainly include adsorption method, membrane separation, redox process, photocatalytic oxidation process, electrochemical process, biology method, etc. And physical chemistry-biochemistry group technology is mainly adoped, physical-chemistry in decoloration, biochemistry in removal of organics at domestic.Natural minerals have surface effect, porthole effect, ion exchange effect, hydrate effect, redox effect, Semiconductor effect, biology exchange effect, etc. So they show up unique environmental purification function. Besides, natural minerals also have following merits, widespread and low price.So mineral materia have a bright application prospect in the environmental purification territory. 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 (CMC) was synthesized with a mix-granulate-calcine process(90℃parch,900℃calcine for 1h). 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. The main conclusions are as follows:1. The decolorization rate of both wastewater can reach more than 95% under the optimum condition,8 g/L dosage,12 h react time, and pH 2-8.2. After being calcinated at 800℃for 15min, making the metal ions possess activity over and over again, the material can be regenerated. It demonstrated that usage counter was over six times.3. Present anions had vnaanlbzon on the decolorization, Cl- and SO42- make a big difference on the DirectB decolorization, higher ion concentration was good for dye decolorization.4. The characteristics of the material showed, the material had apparent micropore structure. It is feasible to achieve granulate by high temperature calcine, soaking strength>20d, low dissipation rate. It demonstrated that the process is an effective solution to the problems of the separation of mushy stage. Moreover, it had low cost, simple manufacture craft and no secondary pollution, achieving the lowest pollution preparation process.Natural minerals can dealwith printing and dyeing wastewater, because of its rich raw material resources, low in price and excellent decolorization, it gradually becomes research highlight of late years. In this paper, composite minerals ceramic materials were prepared to be applied to the decolorization of printing and dyeing wastewater. The environmental value of natural minerals was widen and new and effective environmental mineral materials were obtained.