Magnetic Nano-Organo-Philic Clay and Zeolite to Remove Municipal Carbonaceous Wastes in Matrouh Station

Document Type : Original Article

Author

Hydro geochemistry dept., Water Treatment and Desalination Unit, Desert Research Center, Cairo, Egypt

Abstract

The iron nanocomposite of montmorillonite and zeolite in nano-sized as adsorbent with size 12-62 nm was carried by co-precipitation technology. Some carbonaceous compounds such as TSS/COD/BOD and TOC and also total nitrogen (TN), total phosphorous (TP) and total suspended solids (TSS) was studied. Pre-treatment analysis of raw clay and zeolite was done by acidification process. The prepared nanocomposite was characterized by X-ray diffraction (XRD) analysis; scanning electron microscopy (SEM), particle size distribution, and fourier transform infrared (FT-IR) spectroscopy and vibration sample magnetometry. This study focused on removal of COD, BOD, TOC and total nitrogen & phosphates by adsorption and desorption processes. The results showed that the maximum percentage removal of COD, BOD, TOC and TSS by using nanocomposite montmorillonite and zeolite/IONPs were 83.13 %, 88.07 %, 86.12 % and 79.2 % respectively. And also, for TN, TP and TSS were 73.74 %, 70.60 % and 79.21 %. The ratio values between COD/BOD5 & COD/TOC and TOC/BOD5 were 1.58, 1.63 and 0.97. Optimal conditions; Nanocomposite dosage: 5 g/l; Contact time: 30 min.; Temp.: 50oC; pH: 6.0. Adsorption data were reproduced by the Langmuir isotherm, where the carbonaceous compounds adsorption saturation capacity was determined as 72.04 and 206.61 mg/g respectively. The average adsorption free energy change was 2.880 kJ/mol, which indicated the occurrence of ionic exchange. The thermodynamic parameters implied that carbonaceous compounds adsorption was endothermic.

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History

  • Receive Date: 09 January 2022
  • Revise Date: 06 March 2022
  • Accept Date: 10 March 2022

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