Excessive nickel ions

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How much before and after nickel ion treatment? Was flocculation and sedimentation carried out?

There are not many nickel smelting enterprises in the country, and there is also a limited amount of technical information regarding the treatment of nickel-containing wastewater. Cases of treating nickel-containing wastewater from the electroplating industry are common; such treatments rely mainly on hydroxide precipitation. However, the natural solubility of nickel hydroxides is relatively high, so this method still fails to meet the emission standards. The key to pH control in the nickel removal process via sulfidation is to maintain extremely precise control in order to achieve the required standards; additionally, the use of certain special chemicals can ensure that these standards are met. We have dealt with nickel-containing wastewater with high nickel levels and large volumes of water – in such cases, sulfidation is used to remove most of the nickel first, followed by the use of a composite chemical to guarantee compliance with the standards.

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How much Ni do you want in the effluent?

This post was last edited by CoCo070563 on 2016-4-24 at 20:41. Our teacher has a product that enables deep processing to reduce Ni levels to around 0.01; I’m not sure if you’re interested in learning more about it. You can contact me via private message

Nickel ions are generally first precipitated using an alkaline solution; once the concentration has decreased, they are then adsorbed by resin. The eluate is again precipitated with an alkaline solution, and this process can bring the concentration below 0.05 ppm, which fully meets the emission standards. In the case of nickel cyanide, it is directly absorbed by an anionic resin, followed by elution, cyanide removal, precipitation, resin adsorption, and further precipitation to achieve the desired result.

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