Sulfide remediation from wastewater using hydrothermally synthesized δ-MnO2/porous graphitic carbon as adsorbent

A facile hydrothermal assisted in-situ precipitation technique was employed for synthesizing highly efficient porous graphitic carbon/manganese dioxide (PGC/MnO 2 ) nanocomposite adsorbent using calcium alginate as carbon precursor. Morphological and structural characterization scanning electron microscopy equipped with energy dispersive X-ray spectroscopy, transmission , diffraction techniques confirmed the interconnected nanoporous architecture birnessite (δ) MnO polymorph evenly distributed on PGC structure. The synergistic effect of exploited enhanced sulfide removal from wastewater via adsorptive oxidation. different experimental parameters, including solution pH, initial concentration, dosage, contact time efficiency investigated. equilibrium kinetic data adsorption by PGC/MnO fitted well Langmuir isotherm pseudo-second-order model, respectively. maximum uptake capacity determined 500 mg/g complete removal. Further, it estimated that a typical field application synthesized would require 0.5–1 g/L per 200 mg/L contaminated wastewater. Based results, schematic oxidation mechanism is proposed. • PGC/MnO2 nanocomposites made Alginate derived KMnO4 precursors. Facile achieved ethanol treatment. Detailed material hierarchial . Synthesized exhibited remarkable 499.3 mg/g.