Abstract:

Nano zerovalent iron (NZVI) is an attractive material for insitu groundwater remediation due to its high activity. However, oxidation and aggregation are easily happened on NZVI and lower its reduction ability. Therefore, researchers try to use environmentfriendly materials to do surface modification on NZVI. A kind of carboxymethyl cellulose (CMC) coating NZVI is synthesized (CNZVI). Its dispersity and reactivity was studied in this paper. The results showed that stabilization of CNZVI is obviously better than commercial RNIP. The higher proportion CMC coating has, the greater stabilization and dispersity CNZVI has. CNZVI also has a good performance on Cr(VI) removal in water.

Key words: nanoscale zerovalent iron, carboxymethyl cellulose, dispersity, Cr(VI)