Facile synthesis of papaya biochar/cerium organic frameworks embedded gelatin composite for highly selective
Sesuraj Sebastin Thomas1, Natrayasamy Viswanathan1, Mohamed Hammad Adam Suleiman2
1Department of Chemistry, Anna University, University College of Engineering - Dindigul, Reddiyarchatram, Dindigul 624 622, Tamilnadu, India.
Abstract:
Excess phosphate in water causes eutrophication. To address this problem, gelatin-based composite was prepared using papaya biochar and cerium organic frameworks namely Gel/PBC/Ce-MOFs composite by the hydrothermal method. This composite was characterized using SEM, EDAX, and FTIR techniques to analyze their physicochemical properties. Batch adsorption tests have been carried out to assess the impact of pH, co-ions, contact time and temperature. The maximum phosphate adsorption capacity of Gel/PBC/Ce-MOFs composite was 47 mg/g, achieved with 30 min. The solution pH influenced phosphate adsorption of this composite. Sulfate ion was found to interfere with phosphate adsorption on the prepared composite. Isotherm analysis indicated that phosphate adsorption on the composite was followed by Freundlich isotherm. Kinetic studies showed that intraparticle diffusion and pseudo-second-order models are appropriate models for phosphate adsorption onto composite. Thermodynamic studies confirmed that the composite adsorbed phosphate spontaneously, with the process being endothermic. Additionally, the prepared composite can be reusable for up to five cycles and its effectiveness under field conditions was also evaluated.
