Abstract
A simple method of resource processing was developed by applying the material preparation technology to hazardous waste utilization. The iron oxide was synthesized by this method with steel pickling waste water and dust water in the production of bleaching powder. The effect of temperature on the synthesis was studied. X-Ray diffraction (XRD), transmission electron microscope (TEM) showed that the iron oxide samples are bright red and spherical α-Fe 2 O 3 powders, and the particle size analysis exhibited that the size of samples prepared at 70 °C and 80 °C were between 250-300nm.
Highlights
Bleaching powder is high concentration of calcium hypochlorite
This paper proposes a new method for the synthesis of red iron oxide, with the idea of changing waste into treasure, synthesizing high quality nano iron oxide red, and dealing with the huge environmental polluting problems facing in calcium hypochlorite industry and the steel industry
The spherical Į-Fe2O3 superfine powders were successfully synthesized with steel pickling waste water and dust water in the production of bleaching powder
Summary
Bleaching powder is high concentration of calcium hypochlorite. Available chlorine of calcium hypochlorite is as high as 70 percent. Fe2O3 has excellent resistance for light, high temperature, alkali and atmospheric effects[6], its raw materials is simple and easy to obtain It has wide range of uses and minimal toxicity. This paper proposes a new method for the synthesis of red iron oxide, with the idea of changing waste into treasure, synthesizing high quality nano iron oxide red, and dealing with the huge environmental polluting problems facing in calcium hypochlorite industry and the steel industry. The traditional treatment of rinse liquid[10] and steel pickling waste water[11] were to make it possible not to pollute the environment. The innovation solves the problem of environmental pollution produced by these two waste liquids, and obtains the high-quality Į-Fe2O3 superfine powders. The method for treating wastes achieves a clean concept of green chemistry, and a certain economic benefits, and this achieve a better treatment of rinse liquid and steel pickling waste water
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