The electroplating industry, while providing functional coatings for many fields, also produces a large amount of zinc-containing wastewater. If the waste water is discharged directly without proper treatment, it will cause serious harm to the ecological environment of water body and human health. The appearance of total zinc remover in electroplating wastewater has brought the dawn to effectively solve this problem.
Zinc in electroplating wastewater mainly comes from raw materials such as zinc salt used in electroplating process and zinc coating on the surface of plating parts. Zinc ions have certain solubility and migration in water, which will lead to water eutrophication, affect the growth, reproduction and metabolism of aquatic organisms, and may eventually enter the human body through the enrichment of the food chain, endangering the human nervous system and immune system.
The action principle of total zinc remover in electroplating wastewater is various. Common is chemical precipitation, in which certain components of the remover, such as sulfide or hydroxide, react chemically with zinc ions to form insoluble zinc sulfide or zinc hydroxide precipitates, thereby separating zinc ions from the wastewater. For example, after sodium sulfide is added to electroplating wastewater as a remover, it will quickly react with zinc ions to produce zinc sulfide precipitation, which has a fast precipitation rate and significant removal effect. There is also the ion exchange method, which uses the exchangeable ions on the ion exchange resin to exchange zinc ions, and adsorbs zinc ions to the resin to achieve the purpose of removing zinc. This method is more effective for the treatment of low concentration zinc wastewater, and the resin can be recycled and reused to reduce the treatment cost.
The remover has many advantages. The first is high efficiency, which can reduce the total zinc concentration in electroplating wastewater to a level that meets the discharge standard in a relatively short time, and improve the efficiency of wastewater treatment. Secondly, it is highly targeted, specifically designed for the characteristics of zinc ions in electroplating wastewater, and has a good removal effect on zinc, without excessive interference with other useful components in the wastewater. Moreover, it is easy to use, according to the zinc content and water quality of the wastewater, the removal agent can be added to the wastewater in accordance with a certain proportion, and the removal of zinc can be achieved by simple stirring, reaction and precipitation operations.
The total zinc remover in electroplating wastewater is often used in combination with other wastewater treatment processes such as flocculation and filtration to further improve the quality and stability of wastewater treatment. With the increasingly strict environmental regulations and the sustainable development needs of the electroplating industry, the total zinc remover of electroplating wastewater is also constantly innovating and improving, developing towards a more efficient, more environmentally friendly and more economical direction, and playing an increasingly important role in protecting water resources and ecological environment.
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