รายละเอียดเอกสาร

สิ่งแวดล้อม มลภาวะ ของเสีย

เอกสารมาตรฐาน

สหรัฐอเมริกา

APHA

SMWW 6251

Disinfection Byproducts: Haloacetic Acids and Trichlorophenol

2023

11

Standard methods for the examination of water and wastewater (543.3 APHA 24th ed. Ref. Treatises&monographs FL2)

The haloacetic acids (HAAs) are formed by the chlorination of natural organic (humic and fulvic) matter. Utilities using chlorine as a water disinfectant generate haloacetic acids, usually as the second most prevalent group of known disinfection byproducts; the primary group formed is usually the trihalomethanes. Toxicological studies indicate that dichloroacetic acid and trichloroacetic acid are animal carcinogens. The U.S. Environmental Protection Agency has promulgated a maximum contaminant level for the sum of 5 haloacetic acids.