Abstract

Gopal Rathor ¹, Neelam Chopra² and Tapan Adhikari ³

DOI : http://dx.doi.org/10.13005/ojc/330259

The management of nickel contaminated soil and water is a major current environmental issue. The main reason for pollution of the environment with nickel is the use of metal complexes in industry, agriculture and household. Nickel kept under environmental pollutant category due to their toxic effects in plants, human and food. There were more methods applicable for heavy metals removal are ion-exchange, adsorption by activated carbon, carbon nanotubes or bioadsorbents, membrane filtration or electrochemical processes. Each method has its limitations, from high investment or operational costs to low removal efficiency and big volume of produced sludge. Nanotechnology offers a number of emerging techniques much more effective and less costly that could work to immobilize contaminants. In the present study, nanoparticles zero valent iron was used to nickel removal from polluted soil and water. Nanopartcles of Zero-valet Iron was synthesized in lab using bottom-up with 0.1M FeSO4, 0.05M EDTA and 0.75M NaBH₄ solutions. TEM, SEM, DLS, DLS zeta, XRD and BET techniques were used to characterization of nZVI. The black coloured synthesized nanoparticles proved to have very small size (less than 100 nm), zeta potential -9.9mv, Surface area   20.96 m²/g. In this study we found that reduced the nickel content in spiked water up to 97% when the water is treated with nZVI (100mg/10 ml of water) while in the case of spiked soil, nickel remediation was recorded nearly 85% after treatment of nZVI (100mg/10 g of soil).The safely ability of iron to act as an electron donor or reducing agent.

nanotechnology; nZVI; remediation; nickel pollution; soil and water

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