Effects of benzotriazole on copper accumulation and toxicity in earthworm (Eisenia fetida)

JOURNAL OF HAZARDOUS MATERIALS

卷:351

Article

Xing, Yanshuai¹  Meng, Xiaoshuang¹  Wang, Lei¹  Zhang, Junjie¹  Wu, Zijing¹  Gong, Xinying¹  Wang, Chenye¹  Sun, Hongwen¹ 

[1] Nankai Univ, Coll Environm Sci & Engn, Tianjin Key Lab Environm Remediat & Pollut Contro, Minist Educ,Key Lab Pollut Proc & Environm Criter, Tianjin 300071, Peoples R China

关键词: Benzotriazole;    Copper;    Earthworm;    Combined pollution;    Subcellular distribution;   

DOI  :  10.1016/j.jhazmat.2018.03.019

来源: Elsevier

【 摘 要 】

Triazole contaminants in water and soil environments can form complexes with metal ions, and therefore affect the bioavailability and toxicity of some heavy metals. In present study, significant increase of copper (Cu) uptake by earthworm (Eisenia fetida) was observed when combined pollution of benzotriazole (BTR) presented in soil. For instance, Cu accumulation in earthworms increased 55% approximately when BTR presented at the BTR/Cu molar ratio of 1:2.5. While the single Cu exposure (at 32 mg kg(-1) in soil) resulted in increased malondialdehyde (MDA) content in earthworms from 0.319 to 0.668 nmol mg protein(-1), joint exposure to BTR at BTR/Cu molar ratio of 1:10 significantly decreased the MDA content to 0.405 nmol mg protein(-1). This indicates a potential detoxification effect of BTR to Cu induced oxidative damage in earthworms. Varied Cu subcellular distribution can be observed in earthworms of the single and combined exposure treatments. With the combined exposure of BTR, the proportion of Cu associated with granular fraction, the toxically inert fraction in earthworms, increased from 25% to 39%. This phenomenon can be used to explain the protective effects of BTR against oxidative damage.

【 授权许可】

Free