Removal of diethyl phthalate via adsorption on mineral rich waste coal modified with chitosan

摘要: Abstract Phthalic acid esters or phthalates in wastewater are priority pollutants and demand efficient method for remediation. Here we present a novel utilization of low grade coal, which is otherwise waste, modified by chitosan as adsorbent removal diethyl phthalate (DEP) via adsorption. A carbon high silicate content coal was chosen, characterized CHN analyzer, energy dispersive X-ray analysis diffraction. composite mineral rich prepared electrostatic interaction hydrogen bonding between the hydroxyl groups group coal; confirmed Fourier transformed infrared spectroscopy, thermogravimetry zeta potential measurements. An optimized 9:1 weight ratio coal-chitosan exhibited positive value aqueous medium corresponded to 91.1% DEP adsorption at an condition e.g., pH 5.8, dose 4 mg/mL contact time 4 h. The thermodynamically favorable followed pseudo-second order kinetics, attributable chemisorption process, attributed functional composite. isotherm data best fitted non-linearly Sips model, consistent with Freundlich lower concentration (5 100 mg/L), while Langmuir favored higher concentrations (100 400 mg/L). qmax 42.67 mg/g, significant improvement sorption from among readily degradable adsorbents reported so far. practical application has been demonstrated its re-usability ability spiked municipal wastewater, supported decrease chemical oxygen treated wastewater.