1. Activated carbon adsorption method to treat industrial oily sewage
Oily industrial waste water, such as the pollution of sea water caused by oil tanker leaks, oil pollution and waste from factories, needs to be processed at multiple levels to meet the standards. Because the oil is an organic material, only the material with good compatibility can absorb and remove it, while activated carbon is with good hydrophilicity, which corresponding to its hydrophilicity is relatively poor, it results in activated carbon adsorption of oil has a certain upper limit. This requires organic matter adsorption and multi-stage treatment of oil-bearing industrial wastewater, and then the final treatment with activated carbon, in order to adsorb the oil in the wastewater completely.
2. Industrial wastewater containing heavy metal ions was treated by activated carbon adsorption
Industrial wastewater is mostly the waste liquid of chemical reaction, which contains a large number of toxic heavy metals such as mercury and chromium that have not been fully reacted. If such metals are discharged into rivers without treatment, they will cause fatal risks to plant growth, protein metabolism and respiratory tract in animals. Activated carbon has a strong adsorption effect on low concentration mercury which is the most toxic in industrial wastewater and it can effectively remove mercury ions. However, at high concentrations, the mercury must first be chemically precipitated, and then activated carbon can be used to completely adsorb the remaining mercury ions. Although the mechanism of activated carbon treatment of industrial wastewater containing chromium is very complex, including physical adsorption of chromium, chemical reduction and physical chemical adsorption, but the effect is very good, general chromium containing wastewater only activated carbon adsorption can remove the chromium ion.
3. Treatment of industrial wastewater containing pigment by activated carbon adsorption
The development of textile industry, especially the garment industry and paper industry in recent years, as well as the incomplete treatment of wastewater produced in the production process, which has led to an increasing amount of wastewater discharge from the pigment industry. As the components of this type of industrial wastewater are very complex, the concentration is large, and the color quality is deep, it is difficult to treat with activated carbon alone. Generally, for pigment industrial wastewater, the commonly used treatment method is to oxidize and adsorb the wastewater first, then carry out membrane separation and multistage degradation, and finally use activated carbon to do deep decolorization treatment. The advantages of activated carbon for strong adsorption of color, which makes it have great application prospects in the treatment of pigment wastewater.
