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REMEDIATION OF ACID MINE DRAINAGE-AFFECTED STREAM WATERS BY MEANS OF ECO-FRIENDLY MAGNETIC HYDROGELS CROSSLINKED WITH FUNCTIONALIZED MAGNETITE NANOPARTICLES
Atrei, A., M. Fiorani, A. Bellingeri, G. Protano, and I. Corsi.
Environmental Nanotechnology, Monitoring & Management 12:100263(2019)

A study was conducted to explore the suitability of a carboxymethylcellulose hydrogel cross-linked with functionalized magnetite nanoparticles (CMC-Fe3O4) to remove heavy metals from solutions of Zn(II) in deionized (DI) water and AMD-affected stream waters. AMD-affected stream waters collected in a former mining site located in the Metalliferous Hills ore district were chosen as a suitable benchmark to validate the hydrogel applications. The hydrogel was able to adsorb Zn(II) from DI water solutions and reduce Zn and other heavy metals such as Cd, Co, Cu, Ni, and Pb in the AMD-affected stream waters. Growth inhibition testing of the hydrogel and treated waters for their effects on the freshwater green alga R. subcapitata showed no effects on growth upon exposure, suggesting that the technique is eco-friendly. Moreover, the hydrogel was able to reduce the toxicity of heavy metals to the green alga, both in DI and AMD-affected stream water.



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