A Comprehensive Insight into Removal of Dye and Antibiotic Based on Mg/Al-LDHs-Biochar Hybrid Materials

ABSTRACT

Wastewater contains dye or pharmaceuticals could imply severe environmental impacts due to their toxicity to ecosystems and, consequently, the generation of human health risks. In this work, the orange peel biochar was prepared through pyrolysis, and then Mg/Al-layered double hydroxide (Mg/Al-LDHs) was grown on the surface of the biochar (BC@Mg/Al-LDHs) by hydrothermal method. The material was characterised by SEM, TEM, XRD, XPS and other techniques. The adsorption performance, adsorption isotherms, kinetics and thermodynamics of BC@Mg/Al-LDHs on methylene blue (MB) or tetracycline hydrochloride (TC) were investigated. The results showed that the maximum adsorption capacity of BC@Mg/Al-LDHs for MB and TC were 75.98 and 29.08 mg/g, respectively. The adsorption equilibrium was reached within 30 minutes, and removal percent was 93.99 and 62.06% for MB and TC, respectively. The obtained results investigate that the prepared BC@Mg/Al-LDHs materials for a broad range of applications in dye and pharmaceuticals separation from the water environment.

Graphical abstract

KEYWORDS:

• Adsorption
• biomass materials
• recoverability
• waste water treatment

Acknowledgments

This work was financially supported by The Natural Science Foundation of the Jiangsu Higher Education Institutions of China (21KJB530010), Jiangsu Planned Projects for Postdoctoral Research Funds (2020Z098), Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province (HPK202002), Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University (FMS202004), Students Practice Innovation and Training Program of Nanjing Forestry University (2020NFUSPITP0807, 2021NFUSPITP0474), Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Start-up Fund from Nanjing Forestry University and the Analysis and Test Center of Nanjing Forestry University.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Jiangsu Planned Projects for Postdoctoral Research Funds [2020Z098]; Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University [FMS202004]; Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province [HPK202002].