PRESENCE OF HEAVY METALS IN RAW BOVINE MILK FROM MACHACHI, ECUADOR
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Politécnica Salesiana
2021
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| _version_ | 1876455503913025536 |
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| author | Francisco de la Cueva |
| author_facet | Francisco de la Cueva |
| contents | PRESENCE OF HEAVY METALS IN RAW BOVINE MILK FROM MACHACHI, ECUADOR Francisco de la Cueva Alexandra Naranjo Byron Puga Torres Eduardo Aragón Ciencias de la Tierra Lead Arsenic Mercury raw milk Machachi The presence of heavy metals in milk is an indicator of local environmental contamination. The objective of this investigation was to test raw milk from Machachi, Pichincha Province, Ecuador for the presence of lead, mercury, and arsenic. Fifty eight samples were collected from twenty nine dairy farms with extensive grazing systems located up to one kilometer from the Municipality of Machachi. Machachi is a site of industrial activity and is located near the Panamericana Sur highway. The samples were analyzed using atomic absorption spectrophotometry with a hydride generator (mercury and arsenic) and a graphite furnace (lead). All analyzed samples indicated the presence of lead, with an average abundance of 0.208 mg/kg (range between 0.0016 to 0.719 mg/kg). Of these samples, 98.28% (57/58) contained lead at levels higher than the maximum allowed by the NTE INEN 9, 0.02 mg/kg. Mercury was detected in four samples with a mean abundance of 0.00009 mg/kg (range between 0.00 to 0.002 mg/kg); and arsenic was detected in two samples with a mean abundance of 0.00003 mg/kg (0.00 to 0.001 mg/kg). Although these levels are very low, they remain worrisome because these carcinogenic elements are capable of accumulating. Based on these results, it can be concluded that lead contamination has occurred in the studied area. Furthermore, the detection of arsenic and mercury, two highly toxic substances, warrants continuous monitoring of the regional milk supply and a search for possible sources of contamination. 2021 artículo científico 1390-3799 https://www.redalyc.org/articulo.oa?id=476065991002 https://www.redalyc.org/journal/4760/476065991002/ https://www.redalyc.org/journal/4760/476065991002/html/ https://www.redalyc.org/journal/4760/476065991002/476065991002.epub https://www.redalyc.org/journal/4760/476065991002/movil https://doi.org/10.17163/lgr.n33.2021.02 en http://www.redalyc.org/revista.oa?id=4760 La Granja. Revista de Ciencias de la Vida application/pdf Universidad Politécnica Salesiana La Granja. Revista de Ciencias de la Vida (Ecuador) Num.1 Vol.33 |
| format | Artículo científico |
| id | redalyc_476065991002 |
| institution | Redalyc |
| language | en |
| publishDate | 2021 |
| publisher | Universidad Politécnica Salesiana |
| spellingShingle | PRESENCE OF HEAVY METALS IN RAW BOVINE MILK FROM MACHACHI, ECUADOR Francisco de la Cueva Ciencias de la Tierra Lead Arsenic Mercury raw milk Machachi PRESENCE OF HEAVY METALS IN RAW BOVINE MILK FROM MACHACHI, ECUADOR Francisco de la Cueva Alexandra Naranjo Byron Puga Torres Eduardo Aragón Ciencias de la Tierra Lead Arsenic Mercury raw milk Machachi The presence of heavy metals in milk is an indicator of local environmental contamination. The objective of this investigation was to test raw milk from Machachi, Pichincha Province, Ecuador for the presence of lead, mercury, and arsenic. Fifty eight samples were collected from twenty nine dairy farms with extensive grazing systems located up to one kilometer from the Municipality of Machachi. Machachi is a site of industrial activity and is located near the Panamericana Sur highway. The samples were analyzed using atomic absorption spectrophotometry with a hydride generator (mercury and arsenic) and a graphite furnace (lead). All analyzed samples indicated the presence of lead, with an average abundance of 0.208 mg/kg (range between 0.0016 to 0.719 mg/kg). Of these samples, 98.28% (57/58) contained lead at levels higher than the maximum allowed by the NTE INEN 9, 0.02 mg/kg. Mercury was detected in four samples with a mean abundance of 0.00009 mg/kg (range between 0.00 to 0.002 mg/kg); and arsenic was detected in two samples with a mean abundance of 0.00003 mg/kg (0.00 to 0.001 mg/kg). Although these levels are very low, they remain worrisome because these carcinogenic elements are capable of accumulating. Based on these results, it can be concluded that lead contamination has occurred in the studied area. Furthermore, the detection of arsenic and mercury, two highly toxic substances, warrants continuous monitoring of the regional milk supply and a search for possible sources of contamination. 2021 artículo científico 1390-3799 https://www.redalyc.org/articulo.oa?id=476065991002 https://www.redalyc.org/journal/4760/476065991002/ https://www.redalyc.org/journal/4760/476065991002/html/ https://www.redalyc.org/journal/4760/476065991002/476065991002.epub https://www.redalyc.org/journal/4760/476065991002/movil https://doi.org/10.17163/lgr.n33.2021.02 en http://www.redalyc.org/revista.oa?id=4760 La Granja. Revista de Ciencias de la Vida application/pdf Universidad Politécnica Salesiana La Granja. Revista de Ciencias de la Vida (Ecuador) Num.1 Vol.33 |
| title | PRESENCE OF HEAVY METALS IN RAW BOVINE MILK FROM MACHACHI, ECUADOR |
| topic | Ciencias de la Tierra Lead Arsenic Mercury raw milk Machachi |
| url | https://www.redalyc.org/articulo.oa?id=476065991002 https://www.redalyc.org/journal/4760/476065991002/ https://www.redalyc.org/journal/4760/476065991002/html/ https://www.redalyc.org/journal/4760/476065991002/476065991002.epub https://www.redalyc.org/journal/4760/476065991002/movil https://doi.org/10.17163/lgr.n33.2021.02 |