Madureira Joana, Melo Rita, Pimenta Andreia I, Verde Sandra Cabo, Borrely Sueli I
a Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico , Universidade de Lisboa , Loures , Portugal.
b Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP , Radiation Technology Center, CTR , São Paulo , Brazil.
Environ Technol. 2018 Apr;39(7):873-877. doi: 10.1080/09593330.2017.1313887. Epub 2017 Apr 21.
Slaughterhouse industry produces large volumes of polluted wastewater, which cause negative impacts on the environment. The objective of this study was to assess the effect of electron-beam irradiation on the ecotoxicity of slaughterhouse effluents with absorbed doses up to 35 kGy. Two acute toxicity assays were applied to evaluate the efficiency of irradiation onto toxicity of wastewater. The exposed living-organisms were a luminescent bacteria Vibrio fischeri, and a freshwater microcrustacean Daphnia similis. Also, the total organic carbon was analysed in order to determine any possible organic carbon removal after irradiation. The ecotoxicological results evidenced that both living-organisms were suitable for the measurements. Therefore, the results demonstrated the toxicity of the effluent and its similarity for both organisms as well as the potential of radiation to reduce these effects. The 35 kGy dose was very effective for reducing toxic effects of slaughterhouse wastewater for daphnids suggesting that ionizing radiation could be used as a tool for removing toxic charge of such effluents. The type of contamination presented by the effluent justify the needs for alternatives of treatment.
屠宰行业产生大量污染废水，对环境造成负面影响。本研究的目的是评估电子束辐照对吸收剂量高达35 kGy的屠宰场废水生态毒性的影响。应用两种急性毒性试验来评估辐照对废水毒性的效果。受试生物为发光细菌费氏弧菌和淡水微型甲壳动物似同型水蚤。此外，分析了总有机碳，以确定辐照后是否有任何可能的有机碳去除情况。生态毒理学结果表明，这两种生物都适合用于测量。因此，结果证明了废水的毒性及其对两种生物的相似性，以及辐射降低这些影响的潜力。35 kGy的剂量对于降低屠宰场废水对水蚤的毒性作用非常有效，这表明电离辐射可作为去除此类废水有毒物质的一种手段。废水呈现的污染类型证明了需要替代处理方法。
