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Scientists Investigate the Presence of Engineered Nanoparticles in Wastewater
Created by snadmin on 11/07/2011 09:48:14


According to Huang, increased use of nanomaterials will result in their release into the environment including the air, water, and soil. The main transport route for ENP would be through industrial wastewater and municipal. Huang says that we are not completely aware about the ENP lifecycle and the extent to which the presence of nanomaterials can affect water, organisms and the ecosystem. He adds that their minute size makes it technically difficult to locate and isolate ENP. Huang’s team is working to determine the behaviour and transport of four important engineered nanomaterials: 

  • titanium dioxide, used in sunblock and food additives
  • zinc oxide, used in cosmetics and food
  • carbon nanotubes, used in printer ink and medicines, and
  • silver, used in refrigerators and disinfecting products. 

The project was sponsored by the US Environmental Protection Agency (EPA).

The research team at the University of Delaware utilises a new experimental approach to gather and categorise sludge samples and wastewater released from four main municipal wastewater treatment plants in Baltimore, Wilmington, Washington D.C., and Philadelphia. They could identify and quantify the nanomaterials retained in the system and their exact location by using electrospray aerosol analysis (EAA) and electrically assisted tangential flow (EATF) membrane filtration integrated with a nano aerosol mass spectrometer (NAMS).

The results obtained will help design engineers to develop new treatment procedures for the removal of solids like titanium dioxide from wastewater and to stop it from entering the environment where its effects are actually not yet known. Using the results from the research, decision makers in public and private sectors can alter wastewater treatment quality standards. Huang plans to launch similar research with scientists from partner firms in Korea, Taiwan and China.

Source: University of Deleware 




Professor of Civil and Environmental Engineering at the University of Delaware, Huang, Donald C. Phillips, is detecting the presence of engineered nanoparticles (ENP) in ground wastewater.print
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