Abstract
To decrease exhaust gas, waste solution, and solid waste accompanied by the synthetic adsorbent procedure and fast separation the adsorbent from large volumes of wastewater. In this paper, large scale SGAP with three-dimensional interpenetrating network structure were prepared in two steps: (1) soluble glass/poly(acryamide) gels were synthesized via free radical polymerization method; (2) soluble glass/poly(acryamide) gels with three-dimensional interpenetrating network structure were foamed at 190 °C for 30 min. The obtained SGAP were used to investigate adsorption of Cu2+ from aqueous solutions. The research results display that the obtained composite has high adsorption capacity at optimum pH = 5. The maximum adsorption capacity was 406.2 mg g−1 within 420 min at 45 °C. The kinetic datum were analyzed using the pseudo first-order and pseudo second-order models and found to fit very well the pseudo second-order kinetic model. Datum of equilibrium experiments were fitted well to Langmuir isotherm. Thermodynamic parameters showed that the adsorption process was spontaneous, endothermic. Energy-dispersive X-ray analyses and Fourier transform infrared spectrophotometry demonstrate the adsorption of Cu2+ onto SGAP.
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