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Industrial wastewater containing persistent organic pollutants—pharmaceutical residues, textile dyes, and phenolic compounds—represents a global environmental challenge that conventional treatment methods struggle to address. Modified LDH catalysts, particularly transition metal-doped variants (Co-Fe, Cu-Mg-Al, Ni-Zn), activate advanced oxidation processes (AOPs) including Fenton-like reactions and peroxymonosulfate (PMS) systems to generate reactive oxygen species that mineralize organic contaminants.
The performance enhancement mechanism operates through three pathways: First, LDH's layered structure exposes abundant coordinatively unsaturated metal sites serving as catalytic active centers—Co-Fe LDH achieves 100% ranitidine degradation within 20 minutes under optimized conditions. Second, surface modification through calcination or organic intercalation increases specific surface area by 3-5x and creates hierarchical porosity for improved mass transfer. Third, the positively charged LDH surface concentrates anionic organic pollutants near catalytic sites through electrostatic attraction. Nanjing Mission New Materials Co.,Ltd supplies custom-engineered LDH catalysts validated to reduce COD levels by 85-95% in real textile and pharmaceutical wastewater, operating effectively across pH 3-11 without secondary sludge generation.
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