Bioequivalence & Bioavailability International Journal (BEBA)
ISSN: 2578-4803
Research Article
Adsorption of Bisphenol A on NH4OH- Modified Rice Husk and
Sugar Cane Bagasse Biochar
Authors:
Alegu HA
,
Umunna JC
,
Ugo VO
,
Nkweke DK
,
Thomas TS
,
Chibuzor CH
,
Okeke UN
,
Okeke NK
,
Isichei CV
and
Uchendu IK*
DOI:
10.23880/beba-16000246
Abstract
Objective: This study investigates the adsorption of bisphenol A (BPA) using ammonium hydroxide (NH₄OH)-modified biochar derived from rice husk and sugarcane bagasse.
Methods: The biochars were produced through a simple carbonization process and characterized using Scanning Electron Microscopy with Energy Dispersive X-ray (SEM/EDX) and Fourier Transform Infrared Spectroscopy (FTIR). SEM/EDX results indicated an amorphous structure, while FTIR analysis revealed functional groups such as alkanes and alkynes. Batch experiments were conducted to examine the influence of adsorbent dosage, contact time, initial BPA concentration, pH, and temperature.
Results: The adsorption performance of the sugarcane biochar (SCB) increased with longer contact time, whereas rice husk biochar (RHB) showed minimal variation. RHB achieved a maximum removal efficiency of 82.32% at 0.8 g dosage. At 50 mg/L BPA concentration, RHB demonstrated the highest adsorption capacity (84.11%). Changes in pH and temperature also impacted adsorption efficiency. Optimal performance for both biochars was observed at 85 °C, with SCB achieving a maximum removal of 79.92%. Overall, RHB was more effective across variations in initial concentration, contact time, pH, and dosage, while SCB performed better with changes in temperature. Conclusion: These findings highlight the potential of modified rice husk and sugarcane bagasse biochars as low-cost and sustainable adsorbents for BPA removal.
Keywords: Adsorption; Bisphenol A; Sugar Cane Biochar; Rice Husk Biochar; NH4OH Modified Biochar
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