Synthesis of poly (3-hydroxy butyrate)-g-poly (ricinoleic acid)-Ag nanocomposite for adsorption of methyl blue with multivariate optimization

Abstract

A novel material based on Poly (3-hydroxy butyrate)-Polyricinoleic acid-Ag nanocomposite (PHB-AgPrici) is prepared and used for removing methyl blue (MB) from water. Solid phase micro-extraction (SPME) in portable syringe systems was established in this work. Silver nanoparticles were induced from AgNO3 in ricinoleic acid under atmospheric autoxidation conditions at room temperature leading to peroxidized polyricinoleic acid (AgPrici). Methacrylate poly (3-hydroxy butyrate) (PHB-MA) was reacted with AgPrici to obtain PHB-poly ricinoleic acid containing silver nanoparticles (PHB-AgPrici). The obtained nanocomposite was characterized using 1H NMR, SEM-EDX, DSC, and FT-IR. Using studies of isotherms, kinetics, and thermodynamics, the adsorption mechanisms of MB over PHB-AgPrici were examined. About 169 mg/g maximum monolayer adsorption capacity was determined and the percentage efficiency was reached to 99.5 %. Moreover, the percentage recovery was recorded at 99.0 % for wastewater and 99.5 % in drinking water which reached 99.7 % in river water. The values of G° −3.709 KJ mol−1 and H° 4.4039 KJ mol−1 designate an endothermic adsorption process. The obtained results indicated that the prepared material is very promising to be used to remove pollutants from industrial wastewater.