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 ...

This paper investigated the effectiveness of incorporating zero-valent iron (ZVI) into electrokinetic (EK) to remediate hyper-Cr(VI) contaminated clay (2497 mg/kg). A ZVI wall was installed in the center of the soil specimen and was filled with 1:1 (w/w) ratio of granular ZVI and sand. Results show that transport of H(+) is greatly retarded by the strong opposite migration of anionic chromate i...

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...

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, ...

Permeable reactive barriers (PRBs) composed of zero-valent iron (ZVI) are susceptible to passivation, resulting in substantially decreased rates of chlorinated solvent removal over time. In this study, the application of low electrical direct current (DC) to restore the reductive capacity of passivated ZVI was examined. Electrical current was applied to a laboratory column reactor filled with a...

The feasibility of a heterogeneous Fenton Process (ZVI/H2O2) using commercial low-carbon-steel nails as the Zero-Valent Iron (ZVI) source was evaluated for first time removal natural organic matter (NOM) from surface waters with distinct physico-chemical characteristics. synergistic effect ZVI and H2O2 on process confirmed. Results showed similar efficiencies NOM in water samples Thames river R...

Background & Aims of the Study: The heterotrophic bacteria are widely used as a water microbial pollution index for drinking water. The aim of this study was to investigate the effect of metallic nanoparticles such as Zero Valent Iron (ZVI), Titanium dioxide (TiO2) and Zinc oxide (ZnO) on Heterotrophic Bacter...

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...

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...