The Acute Toxicity of Single and Combined Exposure of Mercury and Bromoxynil on Fridericia Bulbosa

Abstract:

The acute toxic effects of mercury (Hg) and bromoxynil (BX) on Enchytraediae Fridericia bulbosa in OECD soil were investigated. The results suggested there was statistically significant differences (p<0.05) between negative controls and exposure experiments except the lowest concentration of single pollutant. The 14-d LC50 values for F. bulbosa exposed to Hg and BX were 0.73 and 0.48 mg kg-1, respectively. The concentration of BX significantly influenced to the mortality of earthworms by Hg，and BX was the main contributive factor of the combined toxic effects. The interactive effects between Hg and BX were synergistic when the concentrations of BX were 0.25 and 1 mg kg-1. While BX concentration was 4 mg kg-1, the interactive effects were antagonistic. It can be concluded that F. bulbosa is a suitable test species to measure the acute toxicity of HM and pesticide, and the morality may be considered as a valuable and sensitive biomarker diagnose adverse effects of Hg or BX in soil environment.

• Periodical: Applied Mechanics and Materials (Volume 137)
• Pages: 280-285
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.137.280
• Online since: October 2011
• Authors: Dao Li Yang, Jiang Zhu, Gen Xiang Shen, Wen Hua Wang, Xiao Pin Guo, Zhen Qi Wang, Hong Wei Yao
• Keywords: Acute Toxic Effect, Bromoxynil, Combined Pollution, Enchytraediae F. bulbosa, Mercury

References

[1] Y.J. An, C.Y. Yang, Fridericia peregrinabunda (Enchytraeidae) as a new test species for soil toxicity assessment, J. Chemosphere. 77 (2009) 325-329.

DOI: 10.1016/j.chemosphere.2009.07.013

[2] J. Zhu, Y.T. Lu, Single and joint toxic effects of cadmium and phenanthrene on Enchytraediae Fridericia bulbosa, J. Eur. J. Soil Biol. 44(3) (2008) 260-265.

DOI: 10.1016/j.ejsobi.2008.03.002

[3] K. Lock, C.R. Janssen, Ecotoxicity of mercury to Eisenia fetida, Enchytraeus albidus and Folsomia candida, J. Biol. Fert. Soils. 34 (2001) 219-221.

DOI: 10.1007/s003740100392

[4] W.N. Beyer, E. Cromaritie, G.B. Moment Accumulation of methymercury in the earthworm, Eisenia fetida, and its effect on regeneration, J. B. Environ. Contam. Toxcol. 35 (1985) 157-162.

DOI: 10.1007/bf01636494

[5] E. Fischer, L. Koszorus, Sublethal effects, accumulation capacities and elimination rates of As, Hg and Se in the manure worm, Eisenia fetida, (Oligochaeta Lumbricidae), J. Pedobiologia. 36 (1992) 172-178.

[6] S. Sauve, M. Fournier, Age-specific immunocompetence of the earthworm Eisenia andrei: Exposure to methymercury chloride, J. Ecotoxicon. Environ. Saf. 60(2005)67–72.

DOI: 10.1016/j.ecoenv.2003.12.022

[7] S.N. Bagchi, T. Bitz, A Synechococcous elongatus PCC7942 mutant with a higher tolerance towards the herbicide bentazone also confers resistance to sodium chloride stress, J. Photosynth. Res. 92 (2007) 87–101.

DOI: 10.1007/s11120-007-9176-y

[8] C.L. Yang, T.H. Sun, Single and joint effects of pesticides and mercury on soil urease, J. J. Environ. Sci. 19 (2007) 210-216.

[9] M.E. Wang, Q.X. Zhou, Joint stress of chlorimuron-ethyl and cadmium on wheat Triticum aestivum at biochemical levels, J. Environ. Pollut. 144(2) (2006) 572-580.

DOI: 10.1016/j.envpol.2006.01.024

[10] Q.X. Zhou, M.E. Wang, J.D. Liang, Ecological detoxification of methamidophos by earthworms in phaeozem co-contaminated with acetochlor and copper, J. Appl. Soil Ecol.40 (1) (2008) 138-145.

DOI: 10.1016/j.apsoil.2008.03.014

[11] Baratac，J. Bardd, Toxicity of binary mixtures of metals and pyrethroid insecticides to Daphnia magna Straus. Implications for multisubstance riskes assessment, J. Aquat. Toxicol .78 (1) (2006) 1-14.

DOI: 10.1016/j.aquatox.2006.01.013

[12] Organization for Economic Co-operation and Development (OECD), OECD Guideline for Testing of Chemicals No 207, Earthworm Acute Toxicity Test. (1984)

[13] A.M. Bindesbol., B. Mark, Impacts of heavy metals, polyaromatic hydrocarbons,and pesticides onfreeze tolerance of the earthworm Dendrobaena octaedra, J. Environ. Toxicol. Chem. 28 (2009) 2341–2347.

DOI: 10.1897/09-078.1

[14] K.E. Giller, Toxicity of heavy metals to microorganisms and microbial processes in agricultural soils: a review, J. Soil boil. biochem. 30 (1998) 1389-1414.

DOI: 10.1016/s0038-0717(97)00270-8

[15] A.C. Belfroid, D.T. Sijm, Bioavailability and toxicokinetics of hydrophobic aromatic compounds in benthic and terrestrial invertebrates. Environ. Rev. 4 (1996) 276-299.

DOI: 10.1139/a96-015