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- W4220886021 abstract "Abstract Nitrite is a naturally-occurring inorganic compound that occurs in aquatic environments as an intermediary between nitrate and ammonia in the nitrogen cycle. It is a contaminant of potential concern resulting from anthropogenic activities in some cases. While the acute toxicity of nitrite has been characterized in previous studies, its sublethal toxicity is less understood. To determine the sublethal toxicity of nitrite on freshwater organisms, a suite of organisms was tested including: two salmonids ( Oncorhynchus mykiss and O. kisutch ), an alga ( Pseudokirchneriella subcapitata ), an aquatic macrophyte ( Lemna minor ), and three invertebrates ( Ceriodaphnia dubia, Chironomus dilutus, and Neocloeon triangulifer ). Test organisms were exposed to nitrite concentrations ranging between 0.02 and 1.28 mg/L nitrite (NO 2 -N). The toxicity tests were conducted according to procedures specified in standardized methods, allowing for the estimation of multiple endpoints for each test species. Species sensitivity distributions (SSDs) were generated using endpoints from the toxicity testing results, as well as data from previous studies, from which water chemistry approximated that used in the tests ( i.e., < 5 mg/L chloride, an important toxicity-modifying factor for nitrite). The mayfly, N. triangulifer , was the most sensitive species, followed by the two salmonids (which represented the second and third most sensitive species), although they were not as sensitive to nitrite exposure as reported in previous studies. The fifth percentile hazard concentration (HC5) generated from the SSD could be used for derivation of regulatory benchmarks and threshold values for site-specific aquatic risk assessments." @default.
- W4220886021 created "2022-04-03" @default.
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- W4220886021 date "2022-03-18" @default.
- W4220886021 modified "2023-09-26" @default.
- W4220886021 title "Evaluation Of Sublethal Toxicity Of Nitrite To A Suite Of Aquatic Organisms In Support Of The Derivation Of A Chronic Environmental Water Quality Benchmark" @default.
- W4220886021 doi "https://doi.org/10.21203/rs.3.rs-1455333/v1" @default.
- W4220886021 hasPublicationYear "2022" @default.
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