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Tartrazine adsorbed on biomass with pH variationsPZC analysis (A)and the relationship between pH and the percentage of tartrazine removal, highlighting the pH-dependent nature of the adsorption (B). Experimental conditions: Solutions containing 10 mg·L–1 of dye and 0.1 g of BSY were prepared at pH values ranging between 2 and 8 using McIlvaine buffer at room temperature (25 °C).
