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- W2020904547 abstract "• Debromination of HBCD by NZVI is fast and effective. • HBCD was treated and evaluated under different geochemical conditions. • A surface-chemical reaction was occurred on NZVI while electron transfer took place. • Anions decreased the reaction efficiency of NZVI due to the complexation occurs on Fe surface. • The oxidized sites and species of NZVI also contribute the removal of HBCD through adsorption. Hexabromocyclododecane (HBCD), an emerging contaminant, is a brominated flame retardant that has been widely detected in the environment. In this study, nanoscale zerovalent iron (NZVI) aggregates are firstly used to treat HBCD and its removal under different geochemical conditions is evaluated. HBCD is almost removed from solutions by NZVI, with a k SA of 4.22 × 10 −3 L m −2 min −1 . An increase in the iron dosage and temperature increases the removal rate. The activation energy for the removal of HBCD by NZVI is 30.2 kJ mol −1 , which suggests that a surface-chemical reaction occurs on NZVI. HBCD is adsorbed on the NZVI surface, where electrons were transferred to HBCD, and consequently forms byproducts with less bromide. Three common groundwater anions decrease the reaction kinetics and efficiency of NZVI. The k obs of HBCD in the presence of anions is in the order: pure water >Cl − > NO 3 − ≒ HCO 3 − . The inhibitory effect of these anions may be a result of the possible complexation of anions with the oxidized iron surface. The oxidized sites on NZVI and oxidized species of iron also contribute to the removal of HBCD by adsorption on NZVI from solutions." @default.
- W2020904547 created "2016-06-24" @default.
- W2020904547 creator A5045451133 @default.
- W2020904547 creator A5059499167 @default.
- W2020904547 date "2014-07-01" @default.
- W2020904547 modified "2023-10-17" @default.
- W2020904547 title "The transformation of hexabromocyclododecane using zerovalent iron nanoparticle aggregates" @default.
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- W2020904547 doi "https://doi.org/10.1016/j.jhazmat.2014.04.044" @default.
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