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Effects of water chemistry on the chronic toxicity of lead to the cladoceran, Ceriodaphnia dubia.
Ecotoxicol Environ Saf. 2011 Mar; 74(3):238-43.EE

Abstract

As the first step toward parameterization of a chronic lead (Pb) biotic ligand model (BLM) for Ceriodaphnia dubia, 7-d toxicity tests were performed in waters modified to evaluate the influences of hardness, DOM (as Suwannee River NOM and Aldrich humic acid (HA)), pH (buffered with 4 mM MOPS) and alkalinity on the chronic toxicity of Pb. Calculated EC(20)s for the control base water test and each of the most extreme modified test waters were as follows in μg L(-1) Pb (95% confidence interval): base water control=45 (14-53), 5 mM CaSO(4)=22 (12-30), 32 mg L(-1) DOM=523 (388-573), 2.5 mM NaHCO(3)=73 (21-120) and pH 6.4 buffered with MOPS=3.9 μg L(-1) Pb (1-5). Results indicate that hardness does not protect against chronic toxicity of Pb to C. dubia, whereas HA does protect at the highest concentration tested (597 μM). Additionally, our findings suggest that low pH increases the chronic toxicity of Pb whereas increased alkalinity is protective. The findings reported herein support the need for a chronic Pb BLM as an alternative approach to hardness-based regulations.

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Authors+Show Affiliations

Mager EM
Division of Marine Biology and Fisheries, University of Miami, Rosenstiel School of Marine and Atmospheric Science, Miami, FL 33149, USA. emager@rsmas.miami.edu
Brix KV
No affiliation info available
Gerdes RM
No affiliation info available
Ryan AC
No affiliation info available
Grosell M
No affiliation info available

MeSH

AnimalsDaphniaDose-Response Relationship, DrugFresh WaterHydrogen-Ion ConcentrationLeadToxicity Tests, ChronicWater Pollutants, Chemical

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

21145110

Citation

Mager, Edward M., et al. "Effects of Water Chemistry On the Chronic Toxicity of Lead to the Cladoceran, Ceriodaphnia Dubia." Ecotoxicology and Environmental Safety, vol. 74, no. 3, 2011, pp. 238-43.
Mager EM, Brix KV, Gerdes RM, et al. Effects of water chemistry on the chronic toxicity of lead to the cladoceran, Ceriodaphnia dubia. Ecotoxicol Environ Saf. 2011;74(3):238-43.
Mager, E. M., Brix, K. V., Gerdes, R. M., Ryan, A. C., & Grosell, M. (2011). Effects of water chemistry on the chronic toxicity of lead to the cladoceran, Ceriodaphnia dubia. Ecotoxicology and Environmental Safety, 74(3), 238-43. https://doi.org/10.1016/j.ecoenv.2010.11.005
Mager EM, et al. Effects of Water Chemistry On the Chronic Toxicity of Lead to the Cladoceran, Ceriodaphnia Dubia. Ecotoxicol Environ Saf. 2011;74(3):238-43. PubMed PMID: 21145110.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of water chemistry on the chronic toxicity of lead to the cladoceran, Ceriodaphnia dubia. AU - Mager,Edward M, AU - Brix,Kevin V, AU - Gerdes,Robert M, AU - Ryan,Adam C, AU - Grosell,Martin, Y1 - 2010/12/08/ PY - 2010/03/22/received PY - 2010/11/05/revised PY - 2010/11/21/accepted PY - 2010/12/15/entrez PY - 2010/12/15/pubmed PY - 2011/5/24/medline SP - 238 EP - 43 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 74 IS - 3 N2 - As the first step toward parameterization of a chronic lead (Pb) biotic ligand model (BLM) for Ceriodaphnia dubia, 7-d toxicity tests were performed in waters modified to evaluate the influences of hardness, DOM (as Suwannee River NOM and Aldrich humic acid (HA)), pH (buffered with 4 mM MOPS) and alkalinity on the chronic toxicity of Pb. Calculated EC(20)s for the control base water test and each of the most extreme modified test waters were as follows in μg L(-1) Pb (95% confidence interval): base water control=45 (14-53), 5 mM CaSO(4)=22 (12-30), 32 mg L(-1) DOM=523 (388-573), 2.5 mM NaHCO(3)=73 (21-120) and pH 6.4 buffered with MOPS=3.9 μg L(-1) Pb (1-5). Results indicate that hardness does not protect against chronic toxicity of Pb to C. dubia, whereas HA does protect at the highest concentration tested (597 μM). Additionally, our findings suggest that low pH increases the chronic toxicity of Pb whereas increased alkalinity is protective. The findings reported herein support the need for a chronic Pb BLM as an alternative approach to hardness-based regulations. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/21145110/Effects_of_water_chemistry_on_the_chronic_toxicity_of_lead_to_the_cladoceran_Ceriodaphnia_dubia_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(10)00377-5 DB - PRIME DP - Unbound Medicine ER -