Thread Content
With the rapid advancement of urbanization and industrialization in modern society, new pathogenic microorganisms are constantly appearing in our daily drinking water. To improve the quality of drinking water and effectively remove harmful substances such as trace organic compounds, as well as iron, manganese, and heavy metal ions from it, natural water purifiers have come onto the market – coconut shell activated carbon. The equipment materials used in adsorption towers exhibit corrosion patterns that are significantly different from those under normal corrosion conditions, due to their contact with the activated carbon used for solvent recovery. Especially as corrosive substances are adsorbed and concentrated, the lower layers of the adsorption tower tend to exhibit severe corrosion levels that have not been seen in other types of systems. This phenomenon occurs even with what are generally considered high-grade materials; therefore, it is necessary to consider measures such as improving the properties of certain materials, applying surface treatments, and implementing methods for recovering solvents and maintaining activated carbon, in order to ensure that all materials used in these systems can be utilized over the long term. At present, China’s citric acid industry requires 4,400 tons of activated carbon each year. The supply sources are not classified, and there is chaos regarding quality and prices, which poses many problems for both citric acid manufacturers and activated carbon producers. They are unable to communicate with each other, and disputes arise over quality standards. We have developed activated carbon specifically for citric acid by adjusting its pore structure and altering the polarity of its surface as well as the structure of its electric double layer, in order to produce activated carbon that meets the special requirements of the citric acid industry. Thereby increasing the added value of activated carbon and achieving greater economic benefits. Reuse of reclaimed water has been widely adopted in developed countries, and an increasing number of industries are beginning to use treated wastewater. Population growth leads to an increased demand for water, posing a serious challenge to the existing water resources; water scarcity is becoming increasingly severe, which makes the reuse of water resources all the more important. China’s total water resources amount to 2.8 trillion cubic meters, and when calculated per capita, the country faces severe water shortages. Therefore, the role of activated carbon in the reuse of reclaimed water is becoming increasingly significant in China’s water resource management.