Of course, ZVI is well known for its ability to degrade cVOCs, but it also has shown good degradation of a variety of COCs, such as TPH, TNT, chloroform, etc.  Researchers have shown some of the novel chemistries that ZVI can do.  These reactions include the anaerobic reactions with sulfidated-iron and the aerobic reactions with free radical reactions. David Sedlak at Berkeley has studies these off and on as well as others, but nothing has gone full-scale.  The work on PFAS and Pesticides is the most advance in the field.

The references that are included describe some of the aerobic reactions that can occur with ZVI. To sum it up, ZVI is known to be able to create free radical chemistry capable of degrading PCB’s in the presence of oxygen.  These reactions can be enhanced with the use of a chelator such as EDTA or EDDS.


The last article here looks at an oilfield wastewater.  At the end of experiments, the total removal efficiencies of hydrolyzed polyacrylamide (HPAM), TPH, and COD were 96%, 97% and 92%, respectively.

Cao, M., Tu, S., Xiong, S., Zhou, H., Chen, J., & Lu, X. (2018). EDDS enhanced PCB degradation and heavy metals stabilization in co-contaminated soils by ZVI under aerobic condition. Journal of Hazardous Materials, 358(January), 265–272. https://doi.org/10.1016/j.jhazmat.2018.06.056

Zhou, H., Sun, Q., Wang, X., Wang, L., Chen, J., Zhang, J., & Lu, X. (2014). Removal of 2,4-dichlorophenol from contaminated soil by a heterogeneous ZVI/EDTA/Air Fenton-like system. https://doi.org/10.1016/j.seppur.2014.05.037

Lu, M., & Wei, X. (2010). Treatment of oilfield wastewater containing polymer by the batch activated sludge reactor combined with a zerovalent iron/EDTA/air system. https://doi.org/10.1016/j.biortech.2010.11.103