Adsorptive Removal of Copper (II) Ions from Aqueous Solution Using a Magnetite Nano-Adsorbent from Mill Scale Waste: Synthesis, Characterization, Adsorption and Kinetic Modelling Studies

Nanoscale Research Letters

Kamil Kayode Katibi¹  Hasfalina Che Man¹  Muhammad Umar Abba¹  Khairul Faezah Muhammad Yusof²  Raba’ah Syahidah Azis³  Ismayadi Ismail³  Syazana Sulaiman³ 

[1] Department of Biological and Agricultural Engineering, Faculty of Engineering, UPM;Department of Process and Food Engineering Faculty of Engineering, Universiti Putra Malaysia;Material Synthesis and Characterization Laboratory, Institute of Nanoscience and Nanotechnology (ION2), Universiti Putra Malaysia (UPM);

关键词: Magnetite nano-adsorbents (MNA);    Mill scale waste;    Adsorption;    Copper (II) ion;    Kinetic study;    Adsorption isotherm;   

DOI  :  10.1186/s11671-021-03622-y

来源: DOAJ

【 摘 要 】

Abstract In this study, magnetite nano-adsorbent (MNA) was extracted from mill scale waste products, synthesized and applied to eliminate Cu2+ from an aqueous solution. Mill scale waste product was ground using conventional milling and impacted using high-energy ball milling (HEBM) for varying 3, 5, and 7 milling hours. In this regard, the prepared MNA was investigated using X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), field emission scanning electron microscopy–energy-dispersive X-ray spectroscopy (FESEM-EDS), UV–Vis spectroscopy, Fourier-transform infrared (FTIR), Brunauer–Emmett–Teller (BET) and zeta potential. The resultant MNA-7 h milling time displayed a crystalline structure with irregular shapes of 11.23 nm, specific surface area of 5.98 m2g−1, saturation magnetization, Ms of 8.35 emug−1, and isoelectric point charge at pH 5.4. The optimum adsorption capacity, q e of 4.42 mg.g−1 for the removal of Cu2+ ions was attained at 120 min of contact time. The experimental data were best fitted to the Temkin isotherm model. A comparison between experimental kinetic studies and the theoretical aspects showed that the pseudo-second-order matched the experimental trends with a correlation coefficient of (R 2 > 0.99). Besides, regeneration efficiency of 70.87% was achieved after three cycles of reusability studies. The MNA offers a practical, efficient, low-cost approach to reutilize mill scale waste products and provide ultra-fast separation to remove Cu2+ from water.

【 授权许可】

Unknown