Acute and short‐term chronic effects of continuous and intermittent chlorination on mysidopsis bahia and menidia beryllina

摘要: Intermittent chlorination to inhibit biofouling in condensers is a widespread practice the power generation industry. Because U.S. Environmental Protection Agency's water quality criteria for chlorine were based on continuous exposure of test organisms, it possible that effluent discharge limits derived from these are overprotective aquatic organisms exposed only intermittently. The toxicity 96-h acute and 7-d short-term chronic exposures under intermittent (2-, 4-, 6-, 8-h daily exposures) two saltwater species was determined. Mysids (Mysidopsis bahia) found be more sensitive than inland silversides (Menidia beryllina) when continuously conditions. No difference between responses mysids chlorination. In contrast, All less toxic both exposures. acute-to-chronic ratios (ACR) indicate ACRs approximately 1.5 can used with data estimate chlorine. range 3.1 6.1.