title: [The method to remove nitrite from tap water by tea].
abstract: Drinking water (tap water) is polluted in pipelines by bacteria after long distance transportation. The water contains nitrite (NO2-) which is potentially harmful to human health. The nitrite concentrations range from 0.10 to 2.0 mg/L. Our experiment proved that NO2- could not be removed by boiling, but could be removed by tea. As a natural antioxidant, tea contains several antioxidants, such as ascorbic acid and catechins, which removed NO2- from tap water effectively.
mesh_terms: D000975:Antioxidants; D009573:Nitrites / Q000032:analysis*; D010936:Plant Extracts; D013662:Tea / Q000737:chemistry; D014877:Water Pollution, Chemical / Q000517:prevention & control*; D018508:Water Purification / Q000379:methods; D014881:Water Supply