Synthesis and application of LGB/St/Al2O3 biocomposite for sensitive detection and efficient removal of brilliant green dye from wastewater

Biosorbent has excellent properties for the removal of dyes from wastewater but the leaching of its components in acidic and alkaline medium is a problem which necessitates preparing stable composite to overcome the leaching process. This paper focused on the synthesis of a novel biocomposite (LGB/St/Al₂O₃) by coupling between lignin of guava stem, stearic acid and alumina. LGB/St/Al₂O₃ was characterized using ultra violet/visible/infrared spectra, scanning electron microscope, x-ray diffraction and thermal analysis. The LGB/St/Al₂O₃ was tested for removing of the brilliant green dye (Br.G) from wastewater; the various parameters like Br.G concentration, pH, temperature and shaking time were studied to optimize the best condition for removing of Br.G from aqueous solution. It was found that Br.G was removed 100% in pH range 3–9 with shaking 5 min at room temperature. The pseudo-second order model