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- Title
Preliminary study of doxycycline adsorption from aqueous solution on alkaline modified biochar derived from banana peel.
- Authors
Van-Truc Nguyen; Thanh-Binh Nguyen; Thi-Dieu-Hien Vo; Nguyen Duy Dat; Thi-Kim Quyen Vo; Xuan Cuong Nguyen; Viet-Cuong Dinh; Thi-Ngoc-Chau Le; Thi-Giang-Huong Duong; Manh-Ha Bui; Xuan-Thanh Bui
- Abstract
This study explores the adsorption of doxycycline (DOX) from aqueous solutions onto biochar derived from banana peel, which was prepared using a potassium hydroxide activation method (KOH-BPB). The biochar properties were characterized based on morphology, surface area (SBET of 710.241 m² g-1), functional groups, and surface charge (pHPZC = 7.7). Parameters, including initial pH, DOX concentration, and ionic strength, that influenced the DOX adsorption capacity of KOH-BPB were examined. Adsorption equilibrium of DOX on KOH-BPB was assessed through four isothermal models: the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models. The obtained data were most compatible with the Langmuir model (R² = 0.9879). KOH-BPB has a maximum DOX absorption capacity of 121.95 mg g-1 which exceeds that of many comparable absorbents. The maximum DOX removal was 96.7% at pH 6, a DOX concentration of 20 mg L-1, and a KOH-BPB dose of 1.0 g L-1. These findings reveal that biochar from banana peel effectively removes antibiotic residues from water. This study provides a potential, low-cost, and environmentally friendly adsorbent.
- Subjects
BIOCHAR; AQUEOUS solutions; BANANAS; ANTIBIOTIC residues; DOXYCYCLINE; SURFACE charges; ALKALINE solutions; SOLID-liquid equilibrium
- Publication
Environmental Engineering Research, 2024, Vol 29, Issue 3, p1
- ISSN
1226-1025
- Publication type
Article
- DOI
10.4491/eer.2023.196