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Household detergents, shampoos may form harmful substance in waste water

Date:
April 8, 2010
Source:
American Chemical Society
Summary:
Scientists are reporting evidence that certain ingredients in shampoo, detergents and other household cleaning agents may be a source of precursor materials for formation of a suspected cancer-causing contaminant in water supplies that receive water from sewage treatment plants. The study sheds new light on possible environmental sources of this poorly understood water contaminant, called NDMA, which is of ongoing concern to health officials.

Scientists are reporting evidence that certain ingredients in shampoo, detergents and other household cleaning agents may be a source of precursor materials for formation of a suspected cancer-causing contaminant in water supplies that receive water from sewage treatment plants. The study sheds new light on possible environmental sources of this poorly understood water contaminant, called NDMA, which is of ongoing concern to health officials.

Their study is in ACS' Environmental Science & Technology.

William Mitch and colleagues note that scientists have known that NDMA and other nitrosamines can form in small amounts during the disinfection of wastewater and water with chloramine. Although nitrosamines are found in a wide variety of sources -- including processed meats and tobacco smoke -- scientists know little about their precursors in water. Past studies with cosmetics have found that substances called quaternary amines, which are also ingredients in household cleaning agents, may play a role in the formation of nitrosamines.

Their laboratory research showed that when mixed with chloramine, some household cleaning products -- including shampoo, dishwashing detergent and laundry detergent -- formed NDMA. The report notes that sewage treatment plants may remove some of quaternary amines that form NDMA. However, quaternary amines are used in such large quantities that some still may persist and have a potentially harmful effect in the effluents from sewage treatment plants.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Kemper et al. Quaternary Amines As Nitrosamine Precursors: A Role for Consumer Products? Environmental Science & Technology, 2010; 44 (4): 1224 DOI: 10.1021/es902840h

Cite This Page:

American Chemical Society. "Household detergents, shampoos may form harmful substance in waste water." ScienceDaily. ScienceDaily, 8 April 2010. <www.sciencedaily.com/releases/2010/04/100407110819.htm>.
American Chemical Society. (2010, April 8). Household detergents, shampoos may form harmful substance in waste water. ScienceDaily. Retrieved September 15, 2014 from www.sciencedaily.com/releases/2010/04/100407110819.htm
American Chemical Society. "Household detergents, shampoos may form harmful substance in waste water." ScienceDaily. www.sciencedaily.com/releases/2010/04/100407110819.htm (accessed September 15, 2014).

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