a new and efficient method for the adsorption and separation of arsenic metal ion from mining waste waters of zarshouran gold mine by magnetic solid-phase extraction with modified magnetic nanoparticles

widespread arsenic contamination of mining wastewater of zarshouran (west azerbaijan province) hasled to a massive epidemic of arsenic poisoning in the whole of surrounding areas. it is estimated thatapproximately all agriculture fields are being irrigated with the water that its arsenic concentrationselevated above the world health organization’s standard of 10 parts per billion. a novel advancedmagnetic matter adsorbent using magnetite embedded within nanosized fe3o4 was prepared and appliedfor separation of arsenic metal ion from aqueous solution. this adsorbent combines the advantages ofmagnetic nanoparticles with magnetic separability and high affinity toward arsenic metal ions, whichprovides distinctive merits including easy preparation, high adsorption capacity, and easy isolation fromsample solutions by the application of an external magnetic field. the adsorption behaviors of arsenicfrom an aqueous medium, using iron magnetite nanoparticles were studied by using equilibrium batchand column flow techniques. the effects of ph, contents of loaded magnetic matter nanoparticles, ionicstrength, adsorbent dose, contact time, and temperature on adsorption capacity of the magnetic beads wereinvestigated. all the results suggested that the mentioned nanoparticles could be excellent adsorbents foras(ii) and as(iii) contaminated water treatment.