Ecotoxicity Evaluation of Pure Peracetic Acid (PAA) after Eliminating Hydrogen Peroxide from Commercial PAA

Ravi Kumar Chhetri, Silvia Di Gaetano, Andrea Turolla, Manuela Antonelli and Henrik Rasmus Andersen
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Ravi Kumar Chhetri: Department of Environmental Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
Silvia Di Gaetano: EIM—Ecological Integrated Management S.R.L., 24124 Bergamo, Italy
Andrea Turolla: Environmental Division, Department of Civil and Environmental Engineering (DICA), Polytechnic University of Milano, 20133 Milano, Italy
Manuela Antonelli: Environmental Division, Department of Civil and Environmental Engineering (DICA), Polytechnic University of Milano, 20133 Milano, Italy
Henrik Rasmus Andersen: Department of Environmental Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark

IJERPH, 2020, vol. 17, issue 14, 1-9

Abstract: In recent years, peracetic acid (PAA) has gained a lot of attention as an alternative disinfectant to chlorine-based disinfectants in the water industry. Commercial PAA solutions contain both PAA and hydrogen peroxide (HP), and the degradation of HP is slower than PAA when it is used for disinfection. All previous toxicity studies have been based on commercial PAA, and variance in toxicity values have been observed due to different PAA:HP ratios. In this study, the ecotoxicity of pure PAA was studied, eliminating HP from the commercial PAA mixture using potassium permanganate. Ecotoxicity data were obtained by conducting a battery of ecotoxicity tests: bioassays using Vibrio fischeri (V. fischeri), Daphnia magna (D. magna) , and Pseudokirchneriella subcapitata (P. subcapitata) . The effect concentration (EC 50 ) of pure PAA was 0.84 (a 95% confidence interval of 0.78–0.91) mg/L for V. fischeri and 2.46 (2.35–2.58) mg/L for P. subcapitata , whereas the lethal concentration (LC 50 ) was 0.74 (0.55–0.91) mg/L for D. magna . Compared to this, our previous study found that the EC 50 values of commercial PAA towards V. fischeri and P. subcapitata were 0.42 (0.41–0.44) and 1.38 (0.96–1.99) mg/L, respectively, which were lower than pure PAA, whilst the LC 50 for D. magna was 0.78 (0.58–0.95) mg/L. These results showed that pure PAA was less toxic to the most commonly used aquatic species for toxicity tests compared to commercial PAA, except for D. magna .

Keywords: peracetic acid; hydrogen peroxide; disinfection; ecotoxicity (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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