摘要：Graphical abstractDisplay OmittedAbstractEffluents from textile industry are a major source of environmental pollution, especially water pollution. One of the commonly used nanoparticles is zinc oxide (ZnO). In this study, the toxicity of solutions containing the Reactive blue 29 dye after nano-catalytic process UV/ZnO using the model organismDaphnia magna(D. magna) was studied. This is a fundamental – practical study, which was done at laboratory scale.D. magnais considered as an indicator of textile industry wastewater’s toxicity. First, biological tests were performed according to the Standard Methods for the Examination of Water and Wastewater. Results showed that the LC50values at 24, 48, 72, and 96 h were 80.27, 62.26, 49.42, 32.64 mg/L, respectively.Advantages of this technique includes:•The results of this study can be used for selection of the appropriate methods for the removal of the dyes from wastewater.•Possible hazard of toxicity exists to ecosystems in any receiving system, highlighting the need for evaluating the toxicity of industrial dyes.•The results of this study show thatDaphnia magnais a suitable indicator for evaluating the toxicity of contacted oxidizing nanoparticles with a Reactive blue 29 dye.
关键词：Biological test;Daphnia magna;Toxicity;Reactive blue 29 dye;UV/ZnO;Nanophotocatalysis process
