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Time-dependent uptake and toxicity of nickel to Enchytraeus crypticus in the presence of humic acid and fulvic acid.
Environ Toxicol Chem. 2017 11; 36(11):3019-3027.ET

Abstract

The present study aimed to investigate the influence of different fractions of dissolved organic carbon (DOC) on the uptake and toxicity of nickel (Ni) in the soil invertebrate Enchytraeus crypticus after different exposure times. The addition of DOC as humic acid or fulvic acid significantly reduced Ni uptake by E. crypticus in the soil-solution test system. Median lethal effect concentrations were calculated based on total dissolved Ni concentrations (LC50[Ni]), free Ni ion activity (LC50{Ni2+ }), and Ni body concentrations (LC50Body-Ni). The LC50[Ni] values increased with increasing DOC levels and decreased with exposure time (4, 7, and 10 d). Humic acid exerted a greater protective effect on Ni toxicity than fulvic acid, but the protective effects decreased with prolonged exposure time. The LC50{Ni2+ } values also decreased with exposure time but were almost constant with variation in DOC levels, indicating that the protective effect of DOC is mainly through complexation with free Ni ions to reduce Ni bioavailability. The LC50Body-Ni value was independent of DOC concentration and exposure time, with an estimated overall value of 22.1 µg/g dry weight. The present study shows that body concentration could serve as an effective indicator for predicting Ni toxicity with variations in the exposure environment (e.g., DOC) and exposure time. Environ Toxicol Chem 2017;36:3019-3027. © 2017 SETAC.

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Authors+Show Affiliations

He E
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China. Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit, De Boelelaan, Amsterdam, The Netherlands.
Qiu H
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China.
Qiu R
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China.
Rentenaar C
Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit, De Boelelaan, Amsterdam, The Netherlands.
Devresse Q
Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit, De Boelelaan, Amsterdam, The Netherlands.
Van Gestel CAM
Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit, De Boelelaan, Amsterdam, The Netherlands.

MeSH

AnimalsBenzopyransCarbonHumic SubstancesNickelOligochaetaSolutionsTime FactorsToxicity Tests

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28574657

Citation

He, Erkai, et al. "Time-dependent Uptake and Toxicity of Nickel to Enchytraeus Crypticus in the Presence of Humic Acid and Fulvic Acid." Environmental Toxicology and Chemistry, vol. 36, no. 11, 2017, pp. 3019-3027.
He E, Qiu H, Qiu R, et al. Time-dependent uptake and toxicity of nickel to Enchytraeus crypticus in the presence of humic acid and fulvic acid. Environ Toxicol Chem. 2017;36(11):3019-3027.
He, E., Qiu, H., Qiu, R., Rentenaar, C., Devresse, Q., & Van Gestel, C. A. M. (2017). Time-dependent uptake and toxicity of nickel to Enchytraeus crypticus in the presence of humic acid and fulvic acid. Environmental Toxicology and Chemistry, 36(11), 3019-3027. https://doi.org/10.1002/etc.3870
He E, et al. Time-dependent Uptake and Toxicity of Nickel to Enchytraeus Crypticus in the Presence of Humic Acid and Fulvic Acid. Environ Toxicol Chem. 2017;36(11):3019-3027. PubMed PMID: 28574657.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Time-dependent uptake and toxicity of nickel to Enchytraeus crypticus in the presence of humic acid and fulvic acid. AU - He,Erkai, AU - Qiu,Hao, AU - Qiu,Rongliang, AU - Rentenaar,Charlotte, AU - Devresse,Quentin, AU - Van Gestel,Cornelis A M, Y1 - 2017/07/12/ PY - 2016/11/27/received PY - 2017/01/07/revised PY - 2017/05/31/accepted PY - 2017/6/3/pubmed PY - 2018/2/10/medline PY - 2017/6/3/entrez KW - Accumulation KW - Bioavailability KW - Dissolved organic matter KW - Ecotoxicity KW - Soil organism SP - 3019 EP - 3027 JF - Environmental toxicology and chemistry JO - Environ Toxicol Chem VL - 36 IS - 11 N2 - The present study aimed to investigate the influence of different fractions of dissolved organic carbon (DOC) on the uptake and toxicity of nickel (Ni) in the soil invertebrate Enchytraeus crypticus after different exposure times. The addition of DOC as humic acid or fulvic acid significantly reduced Ni uptake by E. crypticus in the soil-solution test system. Median lethal effect concentrations were calculated based on total dissolved Ni concentrations (LC50[Ni]), free Ni ion activity (LC50{Ni2+ }), and Ni body concentrations (LC50Body-Ni). The LC50[Ni] values increased with increasing DOC levels and decreased with exposure time (4, 7, and 10 d). Humic acid exerted a greater protective effect on Ni toxicity than fulvic acid, but the protective effects decreased with prolonged exposure time. The LC50{Ni2+ } values also decreased with exposure time but were almost constant with variation in DOC levels, indicating that the protective effect of DOC is mainly through complexation with free Ni ions to reduce Ni bioavailability. The LC50Body-Ni value was independent of DOC concentration and exposure time, with an estimated overall value of 22.1 µg/g dry weight. The present study shows that body concentration could serve as an effective indicator for predicting Ni toxicity with variations in the exposure environment (e.g., DOC) and exposure time. Environ Toxicol Chem 2017;36:3019-3027. © 2017 SETAC. SN - 1552-8618 UR - https://www.unboundmedicine.com/medline/citation/28574657/Time_dependent_uptake_and_toxicity_of_nickel_to_Enchytraeus_crypticus_in_the_presence_of_humic_acid_and_fulvic_acid_ L2 - https://doi.org/10.1002/etc.3870 DB - PRIME DP - Unbound Medicine ER -