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Effect of sewage polluted by heavy metal on domestic crops

Journal of Applied Biotechnology & Bioengineering
Delfino Marín-Mendoza1 Gabriel Gallegos-Morales,2 Jesus Jaime Hernández-Escareño,3 Juan Manuel Sánchez-Yáñez4

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The application of sewage water (SW) to irrigate and feed agricultural crops in Mexico is widespread due to the problem of scarcity in the country, and in the world. Agricultural crops not eaten raw irrigated and fed with SW benefit and/or harm directly or indirectly by the chemical composition that in industrial cities that includes heavy metals of risk to human health. The objective of this work was to analyze the effect of sewage with heavy metals on the growth and yield of an agricultural soil of “El Canada” N.L. Mexico. Compared with plant growth and yield in a soil from Cadereyta, Nuevo León, Mexico in greenhouse irrigated with ground water and conventional chemical fertilization. For which the concentration of heavy metals of the SW in the plant and the soil was determined. The results show that the SW used in the irrigation of agricultural crops supported plant growth. With no evidence that heavy metals caused any negative effect on plant growth and yield, despite the length of SW use, it is believed that some of these crops have developed tolerance to heavy metals regarding the risk to be consume by humans and animals.


soil, phytoremediation, oligodynamic effect, soil, plant nutrition