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首页> 外文期刊>Journal of Environmental Science and Health >Ecotoxicological evaluation of waste water from nitrocellulose production
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Ecotoxicological evaluation of waste water from nitrocellulose production

机译：硝化纤维素生产废水的生态毒理学评估

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摘要

The present study evaluated the toxic potential and physicochemical characteristics of waste water generated in nitrocellulose production, including effluents from delignification, bleaching, nitration and mixture (composed of these three effluents), from a plant in the Paraiba Valley, Sao Paulo, Brazil. The test organisms used for toxicity assays were Daphnia similis, Danio rerio, Escherichia coli, Pseudomonas putida and Pseudokircheneriella subcaptata. The results showed that the effluents analyzed present acute and chronic toxicity for the organisms tested. Nitration effluent was the least toxic, while delignification and bleaching effluents were the most toxic. The naturally occurring pollutants in wood fiber and cotton, like lignin, probably contributed to effluents toxicity, in addition to higher concentrations of total dissolved solids, which are in non-compliance with Brazilian legislation, conductivity, chemical oxygen demand and color. The discharge of nitrocellulose effluent into an aquatic environment should only occur after appropriate treatment, due to their toxic characteristics.
机译：本研究评估了硝化纤维素生产中产生的废水的毒性潜力和理化特性，这些废水包括来自巴西圣保罗帕拉依巴谷地工厂的脱木素，漂白，硝化和混合物（由这三种废水组成）产生的废水。用于毒性测定的受试生物是水蚤，拟南芥，大肠杆菌，恶臭假单胞菌和亚伪膜假单胞菌。结果表明，所分析的废水对被测生物具有急性和慢性毒性。硝化废水的毒性最低，而脱木素和漂白废水的毒性最高。木纤维和棉花中的天然污染物（例如木质素）可能会导致废水中的毒性，此外总溶解固体的浓度更高，这不符合巴西的法规，电导率，化学需氧量和颜色。由于硝酸纤维素废水的毒性，只有在经过适当处理后才能将其排放到水生环境中。

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