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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2020
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| Online Access: | https://www.redalyc.org/articulo.oa?id=37072372014 https://www.redalyc.org/journal/370/37072372014/ https://www.redalyc.org/journal/370/37072372014/html/ https://www.redalyc.org/journal/370/37072372014/37072372014.epub https://www.redalyc.org/journal/370/37072372014/movil |
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Table of Contents:
- EFFICIENCY OF EFFLUENT TREATMENT OF MEATPACKING AND TEXTILE PLANTS, IN PHYSICAL, CHEMICAL AND TOXICOLOGICAL TERMS Michelli Fontana Rafael Lopes Turino Ivane Benedetti Tonial Ticiane Sauer Pokrywiecki Elisângela Düsman Ciencias de la Tierra toxicity Allium cepa L Artemia salina L textile effluent meatpacking effluent The disposal of untreated effluents directly affects the water quality of the receiving medium, which can cause damage to the aquatic ecosystem and to human health. Therefore, the objective of this study was to analyze the toxicity and the physical and chemical parameters of raw and treated effluents of a meatpacking and a textile plant, in order to evaluate the effectiveness of the treatment. Thus, cytotoxic tests with Allium cepa L. and the immobility/mortality test with Artemia salina L., besides the physical and chemical tests of pH, ammoniacal nitrogen, oxygen demand, total solids, chlorides and alkalinity were used. The immobility/mortality test with Artemia salinaL. revealed the absence of dead organisms in the tested low concentrations of raw and treated meatpacking and textile effluents. However, the highest concentrations of raw meatpacking effluents (50 % and 100 %) and treated meatpacking effluents (100 %) caused the mortality of organisms. Raw and treated textile effluents were statistically toxic only at the highest concentration evaluated (100 %). Furthermore, the raw and treated effluents of the meatpacking and textile plants were not cytotoxic in the test with Allium cepa L. The results of the physicochemical analyses proved the effectiveness of the treatment of the meatpacking effluents in terms of diminished pH, ammoniacal nitrogen, chemical oxygen demand, and total solids. And the raw effluents from the textile plant also exhibited a reduction in pH, chlorides, alkalinity and total solids. The treatments were effective for these effluents, but still had a toxic effect on A. salina. Thus, it is indicated that additional treatment should be carried out in the textile and meatpacking effluents, emphasizing the importance of adequate treatment systems to prevent environmental harm and public health problems. 2020 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37072372014 https://www.redalyc.org/journal/370/37072372014/ https://www.redalyc.org/journal/370/37072372014/html/ https://www.redalyc.org/journal/370/37072372014/37072372014.epub https://www.redalyc.org/journal/370/37072372014/movil 10.20937/RICA.53375 en http://www.redalyc.org/revista.oa?id=370 Revista Internacional de Contaminación Ambiental application/pdf Universidad Nacional Autónoma de México Revista Internacional de Contaminación Ambiental (México) Num.2 Vol.36