Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, Seminaryjna 3, 85-326 Bydgoszcz, Poland.
Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, Seminaryjna 3, 85-326 Bydgoszcz, Poland.
J Hazard Mater. 2021 Feb 5;403:123856. doi: 10.1016/j.jhazmat.2020.123856. Epub 2020 Sep 5.
Octyl-dimethyl-para-aminobenzoic acid (ODPABA) is one of compounds of emerging concern. It undergoes transformations under the influence of oxidizing or chlorinating agents and UV radiation forming products with different properties. There is very little experimental data concerning the environmental fate of ODPABA and its transformation products. Therefore, the purpose of the studies was to determine environmental parameters: water solubility, soil - water partition coefficient, octanol - air partition coefficient, bioconcentration factor as well as half-life in air, water and soil. Based on the results obtained, the persistence and migration possibilities of ODPABA and its transformation products in the aquatic environment were estimated. Moreover, the ecological toxicity of oxidation and chlorination products was investigated. Microtox®, Daphtoxkit F® and Artoxkit M® tests were used to determine toxicity. LC for Fish and Daphnia magna was calculated by Ecosar module. Studies have shown that as a result of ODPABA transformations, chloroorganic products are formed, which are lipophilic, are bioconcentrated in organic matter, are characterized by significant environmental persistence, can spread over considerable distances and are toxic. Oxidation products have significantly smaller impact on the environment. They are characterized by higher water solubility, lower bioconcentration factor and are less toxic.
辛基-二甲基-对氨基苯甲酸（ODPABA）是一种新出现的关注化合物。它在氧化剂、氯化剂和紫外线辐射的影响下发生转化，形成具有不同性质的产物。关于 ODPABA 及其转化产物的环境归宿，仅有很少的实验数据。因此，本研究的目的是确定环境参数：水溶解度、土壤-水分配系数、辛醇-空气分配系数、生物浓缩系数以及在空气、水和土壤中的半衰期。基于获得的结果，评估了 ODPABA 及其转化产物在水生环境中的持久性和迁移可能性。此外，还研究了氧化和氯化产物的生态毒性。使用 Microtox®、Daphtoxkit F® 和 Artoxkit M® 测试来确定毒性。通过 Ecosar 模块计算了鱼类和大型溞的 LC50。研究表明，由于 ODPABA 的转化，形成了亲脂性的含氯有机产物，这些产物在有机物中被生物浓缩，具有显著的环境持久性，能够在相当大的距离内传播，并且具有毒性。氧化产物对环境的影响要小得多。它们具有更高的水溶解度、更低的生物浓缩系数，毒性也更小。
