Tags

Type your tag names separated by a space and hit enter

Interactions and Toxicity of Cu-Zn mixtures to Hordeum vulgare in Different Soils Can Be Rationalized with Bioavailability-Based Prediction Models.
Environ Sci Technol. 2016 Jan 19; 50(2):1014-22.ES

Abstract

Soil contamination with copper (Cu) is often associated with zinc (Zn), and the biological response to such mixed contamination is complex. Here, we investigated Cu and Zn mixture toxicity to Hordeum vulgare in three different soils, the premise being that the observed interactions are mainly due to effects on bioavailability. The toxic effect of Cu and Zn mixtures on seedling root elongation was more than additive (i.e., synergism) in soils with high and medium cation-exchange capacity (CEC) but less than additive (antagonism) in a low-CEC soil. This was found when we expressed the dose as the conventional total soil concentration. In contrast, antagonism was found in all soils when we expressed the dose as free-ion activities in soil solution, indicating that there is metal-ion competition for binding to the plant roots. Neither a concentration addition nor an independent action model explained mixture effects, irrespective of the dose expressions. In contrast, a multimetal BLM model and a WHAM-Ftox model successfully explained the mixture effects across all soils and showed that bioavailability factors mainly explain the interactions in soils. The WHAM-Ftox model is a promising tool for the risk assessment of mixed-metal contamination in soils.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Qiu H
Division Soil and Water Management, KU Leuven , 3001 Heverlee, Belgium.
Versieren L
Division Soil and Water Management, KU Leuven , 3001 Heverlee, Belgium.
Rangel GG
Division Soil and Water Management, KU Leuven , 3001 Heverlee, Belgium.
Smolders E
Division Soil and Water Management, KU Leuven , 3001 Heverlee, Belgium.

MeSH

Biological AvailabilityCopperEnvironmental PollutionHordeumModels, TheoreticalPlant RootsSoilSoil PollutantsZinc

Pub Type(s)

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

Language

eng

PubMed ID

26649642

Citation

Qiu, Hao, et al. "Interactions and Toxicity of Cu-Zn Mixtures to Hordeum Vulgare in Different Soils Can Be Rationalized With Bioavailability-Based Prediction Models." Environmental Science & Technology, vol. 50, no. 2, 2016, pp. 1014-22.
Qiu H, Versieren L, Rangel GG, et al. Interactions and Toxicity of Cu-Zn mixtures to Hordeum vulgare in Different Soils Can Be Rationalized with Bioavailability-Based Prediction Models. Environ Sci Technol. 2016;50(2):1014-22.
Qiu, H., Versieren, L., Rangel, G. G., & Smolders, E. (2016). Interactions and Toxicity of Cu-Zn mixtures to Hordeum vulgare in Different Soils Can Be Rationalized with Bioavailability-Based Prediction Models. Environmental Science & Technology, 50(2), 1014-22. https://doi.org/10.1021/acs.est.5b05133
Qiu H, et al. Interactions and Toxicity of Cu-Zn Mixtures to Hordeum Vulgare in Different Soils Can Be Rationalized With Bioavailability-Based Prediction Models. Environ Sci Technol. 2016 Jan 19;50(2):1014-22. PubMed PMID: 26649642.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Interactions and Toxicity of Cu-Zn mixtures to Hordeum vulgare in Different Soils Can Be Rationalized with Bioavailability-Based Prediction Models. AU - Qiu,Hao, AU - Versieren,Liske, AU - Rangel,Georgina Guzman, AU - Smolders,Erik, Y1 - 2015/12/23/ PY - 2015/12/10/entrez PY - 2015/12/10/pubmed PY - 2016/9/13/medline SP - 1014 EP - 22 JF - Environmental science & technology JO - Environ Sci Technol VL - 50 IS - 2 N2 - Soil contamination with copper (Cu) is often associated with zinc (Zn), and the biological response to such mixed contamination is complex. Here, we investigated Cu and Zn mixture toxicity to Hordeum vulgare in three different soils, the premise being that the observed interactions are mainly due to effects on bioavailability. The toxic effect of Cu and Zn mixtures on seedling root elongation was more than additive (i.e., synergism) in soils with high and medium cation-exchange capacity (CEC) but less than additive (antagonism) in a low-CEC soil. This was found when we expressed the dose as the conventional total soil concentration. In contrast, antagonism was found in all soils when we expressed the dose as free-ion activities in soil solution, indicating that there is metal-ion competition for binding to the plant roots. Neither a concentration addition nor an independent action model explained mixture effects, irrespective of the dose expressions. In contrast, a multimetal BLM model and a WHAM-Ftox model successfully explained the mixture effects across all soils and showed that bioavailability factors mainly explain the interactions in soils. The WHAM-Ftox model is a promising tool for the risk assessment of mixed-metal contamination in soils. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/26649642/Interactions_and_Toxicity_of_Cu_Zn_mixtures_to_Hordeum_vulgare_in_Different_Soils_Can_Be_Rationalized_with_Bioavailability_Based_Prediction_Models_ DB - PRIME DP - Unbound Medicine ER -