The discharge of colored effluents from various industries poses a significant threat to water resources globally. Among these pollutants, cationic dyes are particularly concerning due to their high solubility, stability, an‎d toxicity. Their presence in water bodies inhibits sunlight penetration, disrupts aquatic ecosystems, an‎d poses risks to human health, including potential carcinogenic an‎d mutagenic effects. While conventional wastewater treatment methods often fall short in effectively removing these persistent compounds, adsorption has emerged as a superior, efficient, an‎d economically viable technique. This booklet provides a detailed scientific overview of the adsorption process for removing cationic dyes, with a special focus on Methylene Blue. It systematically explores the fundamental principles of adsorption, classifies an‎d characterizes a wide range of adsorbents-from natural clays an‎d agricultural waste to advanced synthetic polymers an‎d nanocomposites-an‎d elucidates the complex physico-chemical mechanisms governing the process. The factors influencing adsorption efficiency, such as pH, temperature, an‎d adsorbent properties, are critically examined. A dedicated case study on rice husk demonstrates the practical application of a low-cost adsorbent. The booklet also eva‎luates the sustainability an‎d cost-effectiveness of different adsorbent categories an‎d concludes with future perspectives, highlighting the potential of hybrid materials, green synthesis, an‎d advanced technologies in advancing this critical field of water purification.

11/5/2025 12:00:00 AM

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1404/08/20

The Adsorbents Used for the Removal of Cationic Dyes from Water