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2026

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06

Water Treatment and Quality Enhancement: The Practical Value of High-Specific-Surface-Area Calcium Hydroxide in Wastewater Treatment

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In industrial wastewater treatment, high‑specific‑surface calcium hydroxide is a multifunctional environmental protection agent that simultaneously neutralizes acids and bases, removes heavy metals, promotes flocculation and sedimentation, and purifies water quality. It is widely used in the treatment of effluents from industries such as chemicals, electroplating, textile dyeing, and metallurgy, delivering performance far superior to conventional agents like ordinary lime and caustic soda.
Industrial wastewater is predominantly acidic and contains heavy metal ions such as copper, nickel, chromium, and lead, along with substantial suspended solids and colloidal pollutants. Conventional caustic soda neutralization offers rapid treatment but is costly and fails to remove heavy metals and impurities; ordinary lime, while inexpensive, has low particle reactivity and incomplete reaction kinetics, often leading to turbidity and poor settling performance. High‑specific‑surface‑area calcium hydroxide seamlessly combines the advantages of low cost, high efficiency, and multifunctionality.
During wastewater treatment, its strong alkalinity rapidly neutralizes acidic effluents, precisely adjusting the pH to meet the influent requirements of biochemical systems. Meanwhile, its porous structure effectively adsorbs colloidal particles and organic suspended solids, facilitating rapid flocculation and settling. Most notably, it reacts with various heavy metal ions to form insoluble, stable hydroxide precipitates, enabling highly efficient removal of heavy metals and achieving an exceptionally high compliance rate.
In addition, this product can eliminate harmful bacteria in water, degrade certain organic pollutants, and enhance the biochemical performance of wastewater, thereby supporting the stable operation of subsequent biochemical treatment processes. With its high purity and minimal impurities, it does not generate substantial sludge upon dosing; sludge production is significantly lower than that of conventional lime, substantially reducing sludge disposal costs.
With its multifunctionality, low cost, and high efficiency, high‑specific‑surface‑area calcium hydroxide has become the preferred reagent for industrial wastewater treatment, ensuring compliance with discharge standards while effectively controlling operating costs.

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