May 25, 2021

EPA Responds to Petition Seeking RCRA and TSCA Regulatory Action for Phosphogypsum and Process Wastewater

On May 21, 2021, the U.S. Environmental Protection Agency (EPA) published its response to a portion of the petition it received February 8, 2021, from People for Protecting Peace River, Center for Biological Diversity, and 16 other organizations. 86 Fed. Reg. 27546. While the petition requested three actions related to the Toxic Substances Control Act (TSCA), EPA states that it has determined that only one of those actions is an appropriate request: a request to issue...
May 2, 2018

EPA Continues to Investigate Engineered Nanomaterials in Industrial Wastewater Discharge

On May 2, 2018, the U.S. Environmental Protection Agency (EPA) published a Federal Register notice announcing publication of its Final 2016 Effluent Guidelines Program Plan.  The Plan describes EPA’s Clean Water Act rulemakings and other actions intended to control industrial wastewater pollution.  According to the Plan, EPA continued several ongoing investigations, including one on the manufacture and processing of engineered nanomaterials as a potential new source of...
April 26, 2011

Scientists Investigate Behavior of Metallic Silver Nanoparticles in a Pilot Wastewater Treatment Plant

Environmental Science & Technology posted on April 5, 2011, an article entitled “Behavior of Metallic Silver Nanoparticles in a Pilot Wastewater Treatment Plant.” The abstract states: We investigated the behavior of metallic silver nanoparticles (Ag-NP) in a pilot wastewater treatment plant (WWTP) fed with municipal wastewater.  The treatment plant consisted of a nonaerated and an aerated tank and a secondary clarifier.  The average hydraulic retention time including...