Reduction of ozone oxidants in synthetic seawater by use of sodium thiosulfate

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Progressive Fish and Culturist; (United States)

DOI:https://doi.org/10.1577/1548-8640(1992)054<0054:ROOOIS>2.3.CO;2· OSTI ID:6502344

Hemdal, J F ^[1]

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1. Toledo Zoological Society, OH (United States)

Ozone gas was dissolved in synthetic seawater at various concentrations. The toxicity of the resultant ozone oxidants on Brachionus sp. rotifers was noted. The time to 50% mortality ranged from 10 min for an oxidant concentration of 9.0 mg/L to more than 23 h for a 0.43-mg/L concentration. Sodium thiosulfate was added to water samples containing known toxic concentrations of ozone oxidants. One milligram of sodium thiosulfate neutralized 0.16-1.13 mg of ozone oxidants depending on the length of time the sample was aerated before thiosulfate was added: the longer the aeration, the less effectively thiosulfate neutralized oxidants. In samples in which the oxidants were fully neutralized by sodium thiosulfate, the time to 50% rotifer mortality was comparable to that in control samples never exposed to ozone. 7 refs., 3 tabs.

• OSTI ID: 6502344
• Journal Information: Progressive Fish and Culturist; (United States), Vol. 54:1; ISSN 0033-0779
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
OZONE
BIOLOGICAL EFFECTS
ROTIFERA
MORTALITY
THIOSULFATES
ANTIOXIDANTS
AQUATIC ECOSYSTEMS
AQUATIC ORGANISMS
OXIDIZERS
SEAWATER
SODIUM
TOXICITY
ALKALI METALS
ANIMALS
ECOSYSTEMS
ELEMENTS
HYDROGEN COMPOUNDS
INVERTEBRATES
METALS
OXYGEN COMPOUNDS
WATER
540320* - Environment
Aquatic- Chemicals Monitoring &amp; Transport- (1990-)
560300 - Chemicals Metabolism &amp; Toxicology