Abstract
Walnut, pistachio and chestnut shells are wonderful precursors for activated carbon. Due to the country’s tremendous output and consumption of the nuts, a huge amount of nut shells are produced in China every year. In this study, activation temperature, activation time, impregnation ratio and zinc chloride activator concentration for high quality activated carbon formation are investigated experimentally by the methylene blue adsorption method. Copper ion adsorption is also analyzed. Chestnut shell is the most suitable material for activated carbon preparation. With 357mg/g methylene blue adsorption value, that is 2.6 times as the China’s national standard. All three types activated carbon show the highest copper ion adsorption when the concentration of copper sulfate is 50ppm, and the maximum adsorption capacity is 1.06mg/g.
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