This work evaluates the integration of dehalogenation with Zero Valent Iron (ZVI) and electrochemical oxidation (EO) for treatment urines polluted iodinated X-ray contrast media (ICM). To do this, different strategies were evaluated: pretreatment ZVI followed by EO (ZVI-EO) or electrolysis enhanced ZVI-dehalogenation (EO/ZVI). For comparison purposes, single was also performed to check best str...

Chlorinated solvents in the subsurface are a widespread problem with thousands of impacted sites in the United States. A large body of literature exists that evaluates treatment of chlorinated solvents using granular zero valent iron, which has been shown to treat chlorinated solvents via reductive dechlorination. Much of this literature is conducted within the context of permeable reactive bar...

results the results showed that the pcp degradation increased with an increase in zvi dosage from 0.056 to 1.4 g/l, an increase in persulfate concentration from 2.5 to 15.0 mm/l, and an increase in zvi to ps molar ratio from 0.1 to 2.5. the optimal initial ph for pcp removal was 5.0 and the maximum removal efficiency of 70% was achieved within 120 minutes. moreover, the zvi catalyst was reused ...

Developing innovative bioprocess strategies for carbon capture and utilization has been a major focus of research over the past decade as way creating more resilient world. In this study, zero-valent iron (ZVI) was utilized to generate hydrogen, which then an electron donor CO2 reduction by either Clostridium aceticum or carboxidivorans. For bioprocess, early acidic condition in reactors facili...

The bacterial redox state is essential for controlling the titer and yield of final metabolites in most bioconversion processes. Glycerol conversion to 1,3-propanediol (PDO) requires a large amount reducing equivalent expression reductive pathways. Zero-valent iron (ZVI) was used glycerol Klebsiella pneumoniae L17. level 1,3-PDO production increased with oxidation ZVI (31.8 ± 1.2 vs. 25.7 0.5, ...

This work describes the synthesis and testing of a novel environmental sorbent that combines the advantages of biochar, chitosan, and zerovalent iron (ZVI). Chitosan was used as a dispersing and soldering reagent to attach fine ZVI particles onto bamboo biochar surfaces. Characterization of the resulted ZVI-biochar composites (BBCF) indicated that chitosan effectively soldered the iron particle...

Zero-valent iron (ZVI) and green rusts can be used as reductants to convert chromium from soluble, highly toxic Cr(VI) to insoluble Cr(III). This study compared the reduction rates of Cr(VI) by ZVI and two carbonate green rust phases in alkaline/hyperalkaline solutions. Batch experiments were carried out with synthetic chromate solutions at pH 7.7-12.3 and a chromite ore processing residue (COP...

Raz Avni, Moran Nave, Omer Barad, Kobi Baruch, Sven O. Twardziok, Heidrun Gundlach, Iago Hale, Martin Mascher, Manuel Spannagl, Krystalee Wiebe, Katherine W. Jordan, Guy Golan, Jasline Deek, Batsheva Ben-Zvi, Gil Ben-Zvi, Axel Himmelbach, Ron P. MacLachlan, Andrew G. Sharpe, Allan Fritz, Roi Ben-David, Hikmet Budak, Tzion Fahima, Abraham Korol, Justin D. Faris, Alvaro Hernandez, Mark A. Mikel, ...

In this study, degradation of p-chlorophenol (p-CP) was evaluated using persulfate (PS) activated zerovalent iron (ZVI) based ultraviolet (UV) in a bench scale photoreactor. The effect of operational parameters such as solution pH (3, 7, and 11), reaction time (0-60 minutes), ZVI dosage (0.15, 1.25, 0.5, 1, and 1.5 mM), PS concentration (0.5, 1.5, 2, 2.5, 3, and 4 mM), and initial p-CP concentr...