Evaluation of caffeine adsorption by MgAl-LDH/biochar composite.
Pollyanna Vanessa Dos Santos LinsDanielly Carlos HenriqueAlessandra Honjo IdeCarmem Lúcia de Paiva E Silva ZantaLucas MeiliPublished in: Environmental science and pollution research international (2019)
In the present work, the composite MgAl-LDH/biochar using activated carbon from bovine bone as support for the layered double hydroxide particles was successfully synthesised and used as an alternative adsorbent for caffeine removal from water. Kinetic studies showed that the equilibrium was achieved in only 20 min of contact between the adsorbent and the adsorbate. The pseudo-first-order model represented the experimental data more satisfactorily (R2 = 0.95), suggesting a physical adsorption process. The isotherms were performed at three temperatures, in which it was observed the decrease in the adsorption in higher temperatures. It was obtained a maximum adsorption capacity of 26.219 mg/g at 40 °C, and the experimental data were better adjusted by Redlich-Peterson, R2 > 0.9942. In short, the study demonstrated that the composite was satisfactorily synthesised and its use in the caffeine removal was quite attractive, being a potential adsorbent for water treatment applications.
Keyphrases
- aqueous solution
- heavy metals
- electronic health record
- big data
- physical activity
- mental health
- anaerobic digestion
- sewage sludge
- bone mineral density
- risk assessment
- mass spectrometry
- body composition
- machine learning
- organic matter
- molecular dynamics
- molecular dynamics simulations
- combination therapy
- data analysis
- bone loss
- solid phase extraction
- deep learning
- human health