| Literature DB >> 26212946 |
Cangliang Shen1, Pauline Norris2, Olivia Williams3, Stephanie Hagan4, KaWang Li5.
Abstract
Free chlorine (FC) reacting with organic matter in wash water promotes the formation of chlorine by-products. This study aims to evaluate the dynamic impact of FC and organic load on the generation of haloacetic acids (HAAs) and trihalomethanes (THMs) in simulated wash water. Lettuce juice was sequentially added into FC solution with FC periodically replenished. Water samples were collected after each lettuce juice addition to measure water qualities and determine HAAs and THMs using US-Environmental-Protection-Agency (EPA) methods. Concentrations of 88-2103 μg/l of total HAAs and 20.79-859.47 μg/l of total THMs were detected during the study. Monobromoacetic, tribromoacetic, chlorodibromoacetic and trichloroacetic acid were the major HAAs components. Chloroform (trichloromethane) was the primary THMs present. A significant correlation of HAAs with chemical oxygen demand and THMs with FC was observed. Results indicated that optimizing wash water sanitizing systems to limit organic matters and maintain minimal effective FC concentration is critical.Entities:
Keywords: Bromodichloromethane (PubChem CID: 6359); Chlorodibromoacetic acid (PubChem CID: 115266); Dibromochloromethane (PubChem CID: 31296); Free chlorine; Haloacetic acids; Monobromoacetic acid (PubChem CID: 6227); Organic loads; Tribromoacetic acid (PubChem CID: 6415); Tribromomethane (PubChem CID: 5558); Trichloroacetic acid (PubChem CID: 6421); Trichloromethane (PubChem CID: 6212); Trihalomethanes
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Year: 2015 PMID： 26212946 DOI： 10.1016/j.foodchem.2015.04.146
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514