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. 2026 Feb 4;16:7316. doi: 10.1038/s41598-026-36097-x

Fig. 7.

Fig. 7

Three-dimensional response surface plots showing the interactive effects of a pH and nanohybrid adsorbent dosage, b pH and contact time, c adsorbent dosage and contact time, and d adsorbent dosage and temperature on MG removal efficiency (R% MG). Color gradients represent response magnitude, and red circles indicate actual experimental data points.