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首页> 外文期刊>Materials >Photocatalytic Degradation of Diclofenac by Hydroxyapatite–TiO 2 Composite Material: Identification of Transformation Products and Assessment of Toxicity
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Photocatalytic Degradation of Diclofenac by Hydroxyapatite–TiO 2 Composite Material: Identification of Transformation Products and Assessment of Toxicity

机译：羟基磷灰石-TiO 2复合材料光催化降解双氯芬酸：转化产物的鉴定和毒性评估

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Diclofenac (DCF) is one of the most detected pharmaceuticals in environmental water matrices and is known to be recalcitrant to conventional wastewater treatment plants. In this study, degradation of DCF was performed in water by photolysis and photocatalysis using a new synthetized photocatalyst based on hydroxyapatite and TiO 2 (HApTi). A degradation of 95% of the target compound was achieved in 24 h by a photocatalytic treatment employing the HApTi catalyst in comparison to only 60% removal by the photolytic process. The investigation of photo-transformation products was performed by means of UPLC-QTOF/MS/MS, and for 14 detected compounds in samples collected during treatment with HApTi, the chemical structure was proposed. The determination of transformation product (TP) toxicity was performed by using different assays: Daphnia magna acute toxicity test, Toxi-ChromoTest, and Lactuca sativa and Solanum lycopersicum germination inhibition test. Overall, the toxicity of the samples obtained from the photocatalytic experiment with HApTi decreased at the end of the treatment, showing the potential applicability of the catalyst for the removal of diclofenac and the detoxification of water matrices.
机译：双氯芬酸（DCF）是环境水基质中检测最多的药物之一，已知对常规废水处理厂具有顽固性。在这项研究中，DCF的降解是通过使用基于羟基磷灰石和TiO 2（HApTi）的新型合成光催化剂通过光解和光催化进行的。通过使用HApTi催化剂的光催化处理，在24小时内降解了95％的目标化合物，相比之下，光解过程仅去除了60％。通过UPLC-QTOF / MS / MS进行了光转化产物的研究，并针对HApTi处理过程中收集的样品中的14种检测到的化合物提出了化学结构。转化产物（TP）毒性的测定通过以下不同的方法进行：大型蚤（Daphnia magna）急性毒性试验，Toxi-ChromoTest和Lactuca sativa和茄果茄发芽抑制试验。总体而言，在处理结束时，使用HApTi进行光催化实验获得的样品的毒性降低，表明该催化剂对去除双氯芬酸和水基质解毒的潜在适用性。

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