TOTAL CONTENTS OF CADMIUM, COPPER, MANGANESE AND ZINC IN AGRICULTURAL SOILS IRRIGATED WITH WASTEWATER FROM HIDALGO, MÉXICO
This study analyzes the levels of heavy metals (Cd, Cu, Mn and Zn) present in five soil profiles from the state of Hidalgo and which, for over 40 years, have been irrigated with wastewater coming out of the basin of México. These soil profiles are compared to others from a nearby area which are free...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | México |
| Recursos: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Internacional de Contaminación Ambiental |
| Idioma: | español |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/29310 |
| Acesso em linha: | https://www.revistascca.unam.mx/rica/index.php/rica/article/view/29310 |
| Access Level: | acceso abierto |
| Palavra-chave: | heavy metals soil pollution cadmium copper manganese zinc wastewater |
| Resumo: | This study analyzes the levels of heavy metals (Cd, Cu, Mn and Zn) present in five soil profiles from the state of Hidalgo and which, for over 40 years, have been irrigated with wastewater coming out of the basin of México. These soil profiles are compared to others from a nearby area which are free from effluent irrigation. It was observed that in sites which have been irrigated with sewage effluents the averages of metal concentrations in Ap horizons were consistently higher in comparison with the lower horizons. The average content of Cu in Ap horizons was highly significant which indicates high accumulation in the superficial soil layers. With respect to Cd and Zn, it was noted that highly significant accumulations embrace the two most superficial soil horizons. No significant accumulations of Mn were present in the superficial soil horizons. It was possible to observe the influence of irrigation when comparisons were made between total contents of the above mentioned elements in areas irrigated with wastewater and those not receiving these effluents. In this last case heavy metal contents were lower and the difference between both areas was highly significant. Contents of organic matter and silt seem to be the soil properties most associated to the presence of Cu, Mn and Zn in soils irrigated with sewage effluents, while CaCO3 contents in soils is the characteristic most associated to Cd. |
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