Application of Functionalized Iron Magnetic Nanoparticles (γfe2o3) by Humic Acid for Elimination of Anionic and Cationic Pollutants from Wastewater تطبيق حبيبات أکسيد الحديد المغناطيسيه المتناهية الصغر والمشبعه بحمض الهيوميک في ازالة الملوثات الانيونيه والکاتيونيه من المياه العادمه

Document Type : Original Article

Author

Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt.

Abstract

Due to expensive costs in wastewater treatment, humic acid (HA) functionalized onto Fe2O3 magnetic nanoparticles (FeMNPs-HA) was synthesized in this study to remove Cr-6 and Pb+2from wastewater. FeMNPs-HA was synthesized by the co-precipitation method for cheap and eco-friendly materials. FTIR and TGA were used for the characterization of FeMNPs-HA. FTIR showed similar bands for both HA and MNPs-HA and this indicated that HA was successively functionalized at FeMNPs. Moreover, TGA analysis showed high stability of material synthesized, since loss of weight began over 600 °C. Batch adsorption experiment was conducted to state the optimum conditions for removal of positive and negative ions (Pb+2 and Cr-6) from the aqueous solution using FeMNPs-HA. Adsorption of the studied metals onto FeMNPs-HA reached equilibrium in less than5 minutes, whereas the adsorption process wasn't affected by pollutants concentrations. Langmuir adsorption model was suitable to explain the sorption process of Pb+2 and Cr-6 onto MNPs-HA with maximum adsorption capacities reached 99.99 mg g-1. The FeMNPs-HA proved to has the capability for elimination more than 99% of Cr-6 and Pb+2 from the wastewater at optimized pH. Synthesized material was applied for toxic metals elimination from industrial wastewater (IWW), FeMNPs -HA showed high removal efficiency for Cd, Cr and Ni. Based on the adsorption data; FeMNPs -HA could be considered as an efficient material for wastewater purification from heavy metals regardless their charge.

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