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Arsenic is noxious metal exist in water in form of organic dimethyl arsenic acid (C2H7AsO2) and monomethylarsonic acid (CH5AsO3) while in inorganic arsenic trioxide (As2O3) and sodium arsenate (NaH2AsO4). Its trivalent and pentavalent forms are abundant in natural water. Its trivalent form is 60 times more hazardous than pentavalent form. Reports proved that arsenic contamination in water is the basic reason behind many chronic health problems and its removal was the major concern issue. Versatile soft synthesized ferrite material was used as an efficient adsorbent to adsorb arsenic from drinking water in recent times. In these contribution, magnetic nanoparticles adsorbents (NiFe2O4) have been synthesized by co-precipitation route using stable nickel salts and ferric with potassium hydroxide as the precipitating agent. Synthesized NiFe2O4 exhibits tetrahedral and octahedral sites having typical ferromagnetic and technologically properties and used as adsorbent. Nickel ferrite was well characterized by thermo gravimetric analysis (TGA), powder X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS) and field emission scanning electron microscope (FESEM). Adsorption of as using NiFe2O4 correlated well (R2>0.90) with the Freundlich isotherm. The analysis revealed that 98% arsenic has been removed from water by nickel ferrite which is much higher than other adsorbents.

Enhanced Aqueous Arsenic Absorbing Substituted Spinel Nickel Ferrite (NiFe2O4) Nano-Particles