Effective extrapolation models for ecotoxicity of benzene, toluene, ethylbenzene, and xylene (BTEX)
Effective extrapolation models for ecotoxicity of benzene, toluene, ethylbenzene, and xylene (BTEX)
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苯、甲苯、乙苯和二甲苯 (BTEX) 生态毒性的有效外推模型
DOI：
10.1016/j.chemosphere.2019.124906
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发表时间：
2020
期刊：
影响因子：
8.8
通讯作者：
Junhong Ling
中科院分区：
文献类型：
--
作者：
Jiayun Xu;Lei Zheng;Zhenguang Yan;Yi Huang;Chenglian Feng;Linlin Li;Junhong Ling
苯系物对水生生物有明显的毒性作用。本研究收集并筛选了苯、甲苯、二甲苯和甲苯（BTEX）的急性毒性数据，建立了BTEX配对毒性外推模型。结果表明，除苯和二甲苯因数据不足相关性不强外，其余5对BTEX的线性相关性均较好（p< 0.01），其中4对BTEX拟合的R2均大于0.85。交叉验证结果表明，乙苯-二甲苯模型的预测效果最好，所建立的5种BTEX模型对绝大多数物种（81.8%）的预测误差小于10%。用麦穗鱼的实验结果验证了外推模型的正确性，BTEX的急性毒性预测值与实测值的误差小于1倍，表明外推模型具有较高的准确性。
Benzene homologues have significant toxic effects to aquatic organisms. In this study, the acute toxicity data of benzene, toluene, ethylbenzene and xylene (BTEX) were collected and screened, and the toxicity extrapolation model of paired BTEX was established. The results showed that except the correlation between benzene and xylene was not strong due to insufficient data, the linear correlation of the other five paired BTEX was good (p< 0.01), and R2fitted by the four out of five paired BTEX was greater than 0.85. The cross validation showed that ethylbenzene-xylene model was optimal, and for most species (81.8%), the established five BTEX models had a prediction error of less than 10%. Also, these extrapolation models were validated by experimental results ofPseudorasbora parva.The difference between the predicted and measured values of the acute toxicity of BTEX was less than 1 fold, which indicated that the extrapolation model had high accuracy.