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Purpose <p>Arsenic (As) is a significant toxic metalloid that has been subjected to investigations concerning its toxicological relevance. Nevertheless, studies on the toxic effects of As on soil <i>Caenorhabditis elegans</i> are relatively limited and do not fully consider the effects of varying soil properties and residence time. Thus, it is urgent to quantify the As toxicity of <i>Caenorhabditis elegans</i> data to better and informed As risk assessment in soil.</p> Materials and methods <p>ISO 10872 guidelines was used to investigate the toxic effects of aging As (V) for 7, 14, 28, 56, 128 and 156 days on <i>Caenorhabditis elegans</i> growth, fertility, and reproduction in six representative Chinese soils.</p> Results <p>The toxicity of six soils treated with As (V) for 7 days to <i>Caenorhabditis elegans</i> was Yunnan &gt; Hebei &gt; Anhui &gt; Heilongjiang &gt; Gangdong &gt; Jiangxi. The toxicity to <i>Caenorhabditis elegans</i> of the six soils treated with As (V) for 156 days was lower than that after 7 days. Specifically, the growth, fertility and reproductive EC<sub>50</sub> value were increased by 1.4 ~ 3.4, 1.4 ~ 3.7 and 1.7 ~ 3.7 times, respectively. Soil CaCO<sub>3</sub> and total aluminum content (Al<sub>total</sub>) were the most important factors to predict the toxicity of As (V) to <i>Caenorhabditis elegans</i>. We also observed a significant positive correlation between aging effect and manganese oxide content (<i>P</i> &lt; 0.05).</p> Conclusion <p>These findings provided a basis for the toxicity threshold and ecological risk prediction of As contaminated agricultural soils with different physicochemical properties and for more accurate derivation of the soil As reference value in China.</p>

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Influence of soil properties and residence time on the toxicity of exogenous arsenic to soil-dwelling Caenorhabditis elegans

  • 期刊论文

  • 发表日期：

    2025年2月15日

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  • Jian Geng,
  • Long Zhao,
  • Wenjia Wang,
  • Hong Hou,
  • Qiyuan Zhang,
  • Peng Zhang,
  • Samina Irshad,
  • Roland Bol,
  • Xiuli Dang

摘要

Purpose

Arsenic (As) is a significant toxic metalloid that has been subjected to investigations concerning its toxicological relevance. Nevertheless, studies on the toxic effects of As on soil Caenorhabditis elegans are relatively limited and do not fully consider the effects of varying soil properties and residence time. Thus, it is urgent to quantify the As toxicity of Caenorhabditis elegans data to better and informed As risk assessment in soil.

Materials and methods

ISO 10872 guidelines was used to investigate the toxic effects of aging As (V) for 7, 14, 28, 56, 128 and 156 days on Caenorhabditis elegans growth, fertility, and reproduction in six representative Chinese soils.

Results

The toxicity of six soils treated with As (V) for 7 days to Caenorhabditis elegans was Yunnan > Hebei > Anhui > Heilongjiang > Gangdong > Jiangxi. The toxicity to Caenorhabditis elegans of the six soils treated with As (V) for 156 days was lower than that after 7 days. Specifically, the growth, fertility and reproductive EC50 value were increased by 1.4 ~ 3.4, 1.4 ~ 3.7 and 1.7 ~ 3.7 times, respectively. Soil CaCO3 and total aluminum content (Altotal) were the most important factors to predict the toxicity of As (V) to Caenorhabditis elegans. We also observed a significant positive correlation between aging effect and manganese oxide content (P < 0.05).

Conclusion

These findings provided a basis for the toxicity threshold and ecological risk prediction of As contaminated agricultural soils with different physicochemical properties and for more accurate derivation of the soil As reference value in China.