<![CDATA[The increasing generation of sulfuric acid-rich liquid waste from bleaching earth activation poses significant environmental concerns due to its high acidity and potential ecological impact. This study presents a kinetic analysis of ammonium sulfate formation from bleaching earth waste, which has not been widely reported, particularly regarding the determination of reaction orders and activation energy. The reaction was carried out by neutralization with ammonium hydroxide, with no variation in reactant concentration. Experiments were conducted by varying the reaction time (5–25 minutes) and temperature (30–70 °C) to evaluate their effects on the reaction rate. Kinetic analysis was performed by testing zero-, first-, and second-order models using linear regression in Microsoft Excel. The results indicate that the first-order model best represents the experimental data, with R² values ranging from 0.97 to 0.99. The Arrhenius plot of ln k versus 1/T showed a linear relationship with R² = 0.9826, yielding an activation energy (Ea) of 10.611 kJ/mol. The rate constant (k) increased with temperature, confirming the temperature dependence of the reaction. The maximum sulfuric acid conversion achieved was 94.54% at 70 °C and 25 minutes. These findings demonstrate that the developed kinetic model provides a reliable basis for reactor design and process scale-up. The results highlight the potential of converting sulfuric acid waste into value-added ammonium sulfate, contributing to sustainable and economically viable waste management practices.]]>
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