List of Publications

2025 - present

• Boye, K., Noël, V., Babey, T., Pierce, S., Kukkadapu, R. K., Zhao, Q., Bargar, J. R. and Engel, M. (2026). Organic matter and Fe colloid dynamics in a mountainous headwater stream floodplain. Just accepted to Environmental Science: Nano.

• Zheng, Y., Kovarik, L., Kukkadapu, R. K., Zhao, Q. and Engel, M. (2026). Coprecipitated Si controls the divergent pathways of cysteine-induced ferrihydrite transformation. Environmental Science and Technology. 60:22466-22476. https://doi.org/10.1021/acs.est.6c02208 

2020 - 2025

• Spielman-Sun, E., Boye, K., Dwivedi, D., Engel, M., Thompson, A., Kumar, N. and Noël, V. (2024). A Critical Look at Colloid Generation, Stability, and Transport in Redox-Dynamic Environments: Challenges and Perspectives. ACS Earth and Space Chemistry. 8:630-653. https://doi.org/10.1021/acsearthspacechem.3c00255 

• Engel M., Noël V., Pierce S., Kovarik L., Kukkadapu R., Lezama Pacheco J., Qafoku O., Runyon R., Chorover J., Zhou W., Cliff J., Boye K. and Bargar J. (2023). Structure and composition of natural ferrihydrite nano-colloids in anoxic groundwater. Water Research 238:119990. https://doi.org/10.1016/j.watres.2023.119990

• Engel M., Noël V., Kukkadapu R., Boye K., Bargar J. and Fendorf S. (2022). Nitrate controls on the extent and type of metal retention in fine-grained sediments of a simulated aquifer. Environmental Science and Technology 56:14452-14461. https://doi.org/10.1021/acs.est.2c03403 

• Babey T., Boye K., Tolar B., Engel M., Noël V., Perzan Z., Francis C., Bargar J. and Maher K. (2022). Simulation of anoxic lenses as exporters of reactivity in alluvial sediments. Geochimica et Cosmochimica Acta 334:119-134. https://doi.org/10.1016/j.gca.2022.07.018 

• Aeppli M., Babey T., Engel M., Fendorf S., Bargar J. and Boye K. (2022). Export of organic carbon from reduced fine-grained zones governs biogeochemical reactivity in simulated aquifer. Environmental Science and Technology 56:2738-2746. https://doi.org/10.1021/acs.est.1c04664 

• Engel M., Boye K., Noël V., Babey T., Bargar J. and Fendorf S. (2021). Simulated aquifer heterogeneity leads to enhanced attenuation and multiple retention mechanisms of Zn. Environmental Science and Technology 55:2932-2948. https://doi.org/10.1021/acs.est.0c06750 

• Engel M., Lezama Pacheco J., Noël V., Boye K. and Fendorf S. (2020). Organic compounds alter preferences and rates of heavy metal adsorption on ferrihydrite. Science of the Total Environment 750:141485. https://doi.org/10.1016/j.scitotenv.2020.141485 

2015 - 2020

• Engel M. and Chefetz B. (2019). The missing link between carbon nanotubes, dissolved organic matter and organic pollutants. Advances in Colloid and Interface Science 271:1-8. https://doi.org/10.1016/j.cis.2019.101993 

• Engel M., Hadar Y., Belkin S., Lu X., Elimelech M. and Chefetz B. (2018). Bacterial inactivation by a carbon nanotube-iron oxide nanocomposite: A mechanistic study using E.coli mutants. Environmental Science: Nano 5:372-380.  https://doi.org/10.1039/C7EN00865A

• Bhaduri B., Engel M., Polubesova T., Wu W., Xing B. and Chefetz B. (2018). Dual functionality of an Ag-Fe3O4-carbon nanotube composite material: Catalytic reduction and antibacterial activity. Journal of Environmental Chemical Engineering 6:4103-4113. https://doi.org/10.1016/j.jece.2018.06.023 

• Engel M. and Chefetz B. (2016). Removal of triazine-based pollutants from water by carbon nanotubes: Impact of dissolved organic matter (DOM) and solution chemistry. Water Research 106:146-154.  https://doi.org/10.1016/j.watres.2016.09.051 

• Engel M. and Chefetz B. (2016). Adsorption and desorption of dissolved organic matter by carbon nanotubes: Effects of solution chemistry. Environmental Pollution 213:90-98.  https://doi.org/10.1016/j.envpol.2016.02.009 

• Engel M. and Chefetz B. (2015). Adsorptive fractionation of dissolved organic matter (DOM) by carbon nanotubes. Environmental Pollution 197:287–294.  https://doi.org/10.1016/j.envpol.2014.11.020