Abstract
BackgroundSustainable biomaterials are crucial in wastewater treatment applications and are constantly in demand. Multifunctional nanohybrids can eliminate organic and inorganic pollutants from wastewater. MethodsHerein, aluminum alginate/graphene oxide/boehmite (Al-Alg/GO/AlOOH) has been synthesized and characterized using Fourier Transform Infrared Spectrophotometer (FT-IR), Transmission Electron Microscopy (TEM), and X-ray diffraction (XRD). The scavenging of 2-chlorophenol (2-CP) and copper (II)) onto synthesized hybrid biopolymer has been investigated as a function of reaction time, influence of pH, initial concentrations, and temperatures. Significant FindingsThe adsorption of Cu(II) onto Al-Alg/GO/AlOOH nanohybrid was more favorable than the 2-CP. The scavenging of Cu(II) and 2-CP was pH dependent and optimum adsorption capacity was found 83 mg/g for Cu(II) at pH 5.5 and 63 mg/g at pH 9.0 for 2-CP, respectively. The Cu(II) and 2-CP adsorption best fit the Redlich-Peterson (R-P) isotherm model. The equilibrium kinetic data for Cu(II) adsorption was fitted well to the Elovich model, and 2-CP adsorption was closely fitted to the pseudo-first-order (PFO) kinetic model. Cu(II) scavenging was spontaneous and endothermic, while, 2-CP adsorption was exothermic. Cu(II) and 2-CP adsorption mechanisms onto Al-Alg/GO/AlOOH have proposed mainly attraction forces, complexation, and hydrogen bonding. After five successive regenerations, Al-Alg/GO/AlOOH was considered a recyclable and promising adsorbent for removing organic and inorganic pollutants from the contaminated aquatic environment.
Published Version
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