The knowledge about toxic levels of toxic heavy metals in irrigation water is very scarce and quite varied. This work aimed to evaluate the concentrations of toxic heavy metals in the lake of the Experimental Farm UEMG, Passos-MG Unit. The toxic heavy metals evaluated were Cadmium (Cd), Chromium (Cr) and Lead (Pb). The lagoon was divided into ten strategic points for sampling, each point being sampled in triplicate. The pH of the water and the concentrations of toxic heavy metals present were evaluated. PH measurements were performed on the water in natura, being measured before and after filtration. Values ranging from 6.25 to 7.75 were found. For the determinations of Cd, Cr, and Pb, an Atomic Absorption Spectrophotometer was used. The samples were treated with acid digestion. The values of toxic heavy metals found were: Cadmium: 0.727 mg/L at 0.754 mg/L; Chromium: 0.177 mg/L at 0.256 mg/L and Lead: 0.023 mg/L at 0.081 mg/L. These values are above the limit established by CONAMA 357/2005. The dangers of contamination of water by toxic heavy metals are not restricted only to the direct consumption of this water, but also to the consequences in the food chain when we refer to bioaccumulative toxicants.
Cite this paper
Camargo, M. A. F. and Pereira, T. A. R. (2018). Evaluation of Concentrations of Heavy Metals in Water Used in Agricultural Irrigation. Open Access Library Journal, 5, e4959. doi: http://dx.doi.org/10.4236/oalib.1104959.
Pimentel, C.A., Camelo, F.L., Silva, da.O.de.D., Oliveira, de.A.B., Gusmao, S.da.A. and Alves, M.A. (2015) Avaliacao ecotoxicologica da qualidade das aguas do rio Catarino, Re-alengo, RJ. In: XII Congresso Nacional de Meio Ambiente de Pocos de Caldas, 7, 2015, Congresso, Pocos de Caldas, 1-7.
Novaes, C.A. and Aguiar, de.P.M.R.M. (2002) Remocao de metais pesados de efluentes industriais por aluminossilicatos. Química Nova, 25, 1145-1154. http://www.scielo.br/pdf/%0D/qn/v25n6b/13130.pdf https://doi.org/10.1590/S0100-40422002000700015
Valentim, E., Hazin, A.C., Nascimento, F.A., Silveira, B.P., Almeida, M.A. and Silva, S.C.F. (2013) Determinacao de metais pesados em amostras de agua usada para irrigacao de hortalicas cultivadas em beira de estrada. Scientia Plena, 9, 2-3. http://www.scientiaplena.org.br/sp/article/view/1555
Carvalho, A.W., Bosco, D.M.S. and Jimenez, S.R. (2004) Remocao de metais pesados de efluentes aquosos pela zeolita natural escolecita-influência da temperatura e do pH da adsorcao em sistemas monoelementares. Química Nova, 27, 734-738. http://quimicanova.sbq.org.br/detalhe_artigo.asp?id=4010 https://doi.org/10.1590/S0100-40422004000500011
Souza, de.C.L., Lima, S.de.F.R. and Guedes, A.de.J. (2005) Metais pesados em agua do rio Jundiai-Macaiba/RN. Revista de Geologia, 18, 131-142. http://www.researchgate.net/profile/Raquel_Souza5/publication/ 260173782_Metais_pesados_em_gua_do_rio_Jundia_-MacabaRN/ links/02e7e52fe0a7a068a6000000.pdf
Silva, da.C.B.L. (2008) Avaliacao espaco temporal de metais pesados no rio Paranaiba do Sul e rio Imbe por meio de plantas de Eichhornia crassipes (Mart.) Solms (AGUAPE), seston e sedimento. Campos do Goytacazes-RJ, 2008. 99f (tese de mestrado em biociencias e biotecnologia) Universidade Estadual do Norte Fluminense, RJ. http://uenf.br/Uenf/Downloads/pgecologia_5718_1378840785.pdf
Minghini, I. (2007) Avaliacao qualitativa da agua residuaria de abatedouro de aves para fins de reuso em irrigacao, Botucatu, SP: UNESP, 2007. 66f (Tese de mestrado em irrigacao e drenagem) Faculdade de Ciências Agron?micas, Botucatu. http://www.pg.fca.unesp.br/Teses/PDFs/Arq0218.pdf
Roese, M.F. (2008) Me-tais em agua, solo e hortalicas produzidas na regiao urbana no municipio de Campo Grande, MS, Campo Grande, MS: 2008. 73f ( tese de pos graduacao em tecnologias ambientais ) Universidade Federal de Mato Grosso do Sul, Campo Grande, MS. https://posgraduacao.ufms.br/portal/trabalho-arquivos/download/315
Rocha, da.F.A. (2009) Cadmio, chumbo, mercurio, a problematica destes metais pesados na saude pública? monografia em Ciencias da Nutricao, Universidade do Porto, Porto, 38 p. https://repositorio-aberto.up.pt/bitstream/10216/54676/4/127311_0925TCD25.pdf
ATSDR (AGENCY FOR TOXIC SUBSTANCES AND DISEASE REGISTRY) (2000) Toxicological Profile for Chromium. U.S. Department of Health &Human Service, Syracuse.
Moreira, F.R. and Moreira, J.C. (2004) Os efeitos do chumbo sobre o or-ganismo humano e seu significado para a saúde. Revista Panamericana de Salud Pública, 15, 119-129. http://www.scielosp.org/pdf/rpsp/v15n2/20821.pdf https://doi.org/10.1590/S1020-49892004000200007