SaniS.; AbdullahiH.; MazojiA. M. ONE-STEP CENTRAL COMPOSITE-DESIGNED OPTIMIZATION FOR LEAD (II) IONS ADSORPTION ONTO PRISTINE AND ACID-MODIFIED ORANGE-PEELS FROM SIMULATED WASTEWATER. FUDMA JOURNAL OF SCIENCES, v. 8, n. 3, p. 201 - 213, 30 Jun. 2024.