Ca/Al and Mg/Al LDH Supported on Biochars As Effective Adsorbent and Highly Regeneration Ability for Phenol Removal from Aqueous Solution

Erni Salasia Fitri (Research Center of Inorganic Materials and Complexes, Sriwijaya University, Palembang, 30139, Indonesia)
Try Nanda Yunita (Research Center of Inorganic Materials and Complexes, Sriwijaya University, Palembang, 30139, Indonesia)
Risfidian Mohadi (Master of Materials Science, Graduate Program, Sriwijaya University, Palembang, 30139, Indonesia)
Aldes Lesbani (Master of Materials Science, Graduate Program, Sriwijaya University, Palembang, 30139, Indonesia)

Indonesian Journal of Material Research
Vol. 1 No. 3 (2023): November

This research conducted a composite of Ca/Al and Mg/Al Layered double hydroxide with Biochar material using co-precipitation method. Characterization results were carried out with various analyses including XRD, FT-IR, and BET. The results of XRD analysis on Ca/Al-BC showed peaks at 10-11° and 22°, while the Mg/Al-BC material showed peaks at 11. 41° (003), 22. 95° (002), 34. 05° (012) and 60.2° (116). The FT-IR analysis showed that Ca/Al and Mg/Al LDH materials composited with Biochar have functional groups of -OH, nitrate ions, C=O, C-H, C-O, and M-O. BET analysis results show an increase in surface area in Ca/Al and Mg/Al LDH materials after composite with biochar from 29.333 m2/g to 158.291 m2/g in Mg/Al-BC, while in Mg/Al-BC there is an increase from 23.150 m2/g to 111.404 m2/g.  The Ca/Al-BC and Mg/Al-BC composite materials have better stability than Ca/Al and Mg/Al LDH materials that can be used up to the fifth cycle. Hydrogen bonding and π-π interaction between the adsorbent and the aromatic ring on phenol can affect the adsorption process.