Removal of Heavy Metal Nickel in Industrial Wastewater Treatment
The removal of heavy metal nickel is an important issue in the field of industrial wastewater treatment and environmental protection. Here are some common nickel removal methods:
1. Chemical precipitation method: by adding chemical reagents to the wastewater, the nickel ions react with the reagent to form sediment, so as to remove from the wastewater. Commonly used chemical reagents include hydroxide, sulfide and so on. This method is simple and easy to do, but it needs to control the type and dosage of reagents to avoid secondary contamination.
2. Ion exchange method: using the adsorption performance of ion exchange resin to exchange nickel ions in wastewater with other ions on the resin, so as to realize the removal of nickel. This method is less interference to other impurities in the wastewater and has better removal effect, but requires regular replacement and regeneration of ion exchange resin.
3. Electrolysis method: through the nickel ion in the electrolytic wastewater, it is deposited into a metal form on the cathode, so as to achieve the purpose of removal. The effect of this method is stable and reliable, but the energy consumption is large, and there may be the release problem of hydrogen, oxygen and other gases.
4. Biological adsorption method: using the adsorption performance of some microorganisms or biological materials, the nickel ions in the wastewater are adsorbed to the organisms, and then through the separation, recovery and other steps to achieve the removal of nickel. This method has the advantages of low cost and simple operation, but the adsorption effect may be affected by the organism growth conditions, wastewater composition and other factors.
In addition, there are activated carbon adsorption method, membrane separation method and other treatment methods. According to different situations and needs, it is necessary to consider various factors to choose the appropriate treatment method. At the same time, attention should be paid to updating environmental regulations and improving technologies to reduce processing costs and improve processing efficiency. In conclusion, the removal of heavy metal nickel is a complex and important task that requires a comprehensive consideration of multiple factors to select the best treatment method.
More details contact with Vivian Sun 86 13790671695 viviansun@san-mei.com
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