Studying the toxicity of SLEnS-LAS micelles to collembolans and plants: Influence of ethylene oxide units in the head groups.,Journal of Hazardous Materials

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Studying the toxicity of SLEnS-LAS micelles to collembolans and plants: Influence of ethylene oxide units in the head groups.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-03-19 , DOI: 10.1016/j.jhazmat.2020.122522
S Fernandes ₁ , V Nogueira ₂ , F Antunes ₃ , I Lopes ₄ , R Pereira ₁

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Mixed micelles of linear alkylbenzene sulfonic acid (LAS) and ether sulfate-based surfactants (SLEnS) can be added in household products and cleaning agents. SLEnS with higher ethylene oxide (EO) units in the head groups have economic and environmental advantages. This work aims to assess the influence of the number of EO units in the ecotoxicity of seven variants of SLEnS-LAS micelles (0-50 EO units) in soils. Ecotoxicological tests were carried out to assess emergence and growth of four plants species and reproduction of collembolans. Most of the variants inhibited plants growth at the highest concentrations (1237.5 μg SLEnS kg-1 of soildw). For reproduction, lower number of EO units resulted in EC50 from 924.2 (95 % CL: 760.7-1063.4) to 963.2 (95 % CL: 676.9-1249.6) μg SLEnS kg-1 of soildw, whereas for higher number of EO units (50 and 30) no inhibition was reported. Based on these results, we suggest that a higher number of EO units contribute to less hazardous formulations, confirming that different designs of surfactants may contribute to changes in the responses of terrestrial organisms. Therefore, we demonstrate that standardized ecotoxicological assays may contribute to more sustainable and effective formulations, when used upstream, prior to manufacture and marketing.

中文翻译：

研究SLEnS-LAS胶束对collembolans和植物的毒性：头部环氧乙烷单元的影响。

线性烷基苯磺酸（LAS）和基于醚硫酸盐的表面活性剂（SLEnS）的混合胶束可以添加到家用产品和清洁剂中。在头组中具有较高环氧乙烷（EO）单元的SLEnS具有经济和环境优势。这项工作旨在评估EO单元数量对土壤中7种SLEnS-LAS胶束变体（0-50 EO单元）的生态毒性的影响。进行了生态毒理学测试，以评估四种植物的出现和生长以及胶粒的繁殖。大多数变体在最高浓度下（1237.5μgSLEnS kg-1的土）抑制了植物的生长。为了繁殖，较少的EO单位导致EC50从924.2（95％CL：760.7-1063.4）到963.2（95％CL：676.9-1249.6）μgSLEnS kg-1土，而对于更高数量的EO单元（50和30），没有抑制作用的报道。根据这些结果，我们建议使用更多的EO单元有助于降低危险性，从而证明不同设计的表面活性剂可能会导致陆地生物的响应发生变化。因此，我们证明，在生产和销售之前在上游使用时，标准化的生态毒理学测定可能有助于更可持续和有效的配方。

更新日期：2020-03-20

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