Optimization of ammonium adsorption from landfill leachate using montmorillonite/hematite nanocomposite: response surface method based on central composite design

• DOI: 10.5004/dwt.2021.27455
• Publication Date: 2021-12-10T08:42:22Z
• Authors: Hassan Hashemi; Shima Bahrami; Zahra Emadi; Hamideh Shariatipor; Majid Nozari
• Keywords: Central composite design; Langmuir adsorption model; Specific surface area

In this study, the adsorption of ammonium ions from landfill leachate (LL) was examined using montmorillonite/hematite nanocomposite (M/HNC).Parameters affecting such as pH 3-11, adsorbent dosage 0.05-0.25 g/L, mixing speed 75-175 rpm, and contact time 25-125 min were assessed.The central composite design (CCD)-based response surface methodology employed to experiments find optimal conditions.M/HNC synthesized under green conditions structurally investigated X-ray powder diffraction, Fourier-transform infrared spectroscopy, Brunauer-Emmett-Teller, scanning electron microscopy techniques.M/HNC with a particle size about 26 nm, magnetic properties, high specific area.The efficiency LL increased by enhancing parameters pH, dosage, speed, time.The 8.05, 0.167 117.42 81.99 presented according results CCD method.In addition, M/HNC 80% at conditions.The data on fitted well pseudo-second-order kinetic Langmuir isotherm models.It should be noted that interactive effects had an increasing impact efficiency.Based present effective potential for LL.