Fabrication of Cerium Metal-Organic Frameworks Functionalized with Glutamic Acid for Adsorption of Basic Red 46 from Aqueous Solutions: Kinetics, Thermodynamics, and Optimization.

Each line corresponds to a variable: Variable A green line (adsorbent dose) shows a negative trend, indicating that increasing its value reduces ( q e ); Variable B blue line (contact time) displays a positive trend, suggesting that higher values enhance ( q e ); and Variable C gray line (effect of pH) remains relatively flat, implying a minimal effect on ( q e ) within this range.

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