Occurrence and transport of pathogens in subsurface environment arise drinking water safety problems. Pathogens transformed to develop antibiotic resistance pose more challenges to clinical treatment of the infected patients. Understanding the spreading of antibiotic resistance in subsurface environment is an emerging and important field. Nanoparticles have critical control on the adsorption, transport, and transformation of biomaterials (virus, bacteria, antibiotics, antibiotic resistance gene: ARG) in hydrogeological settings, thusly, more attention needs to be paid to improve the understanding of the Bio-Nano Interactions in the subsurface environment. On the other hand, possibility remains to apply nanotechnology to enhance bioremediation by beneficial bacterial. This session aims to gather hydrologists, nanotechnologists and microbiologists to discuss modeling and field studies in the following and the related areas: (a) occurrence, spreading, and environmental concentrations of ARGs; (b) nanoparticle manipulated ARG-bacteria interactions; (c) nanoparticle-associated biomaterial transport; (d) ARG remediation techniques; and (e) nano-enhanced bioremediation of contaminated sites.

• H - Hydrology