logo BDSP

Base documentaire


Votre avis nous intéresse

Le réseau BDSP met en oeuvre un projet d'innovation et d'amélioration de ses services, dans le souci constant de proposer des contenus de qualité adaptés aux besoins des utilisateurs.

Identifier de nouvelles sources de financements est la condition nécessaire pour assurer la poursuite et la pérennité de cet outil unique qu'est la BDSP, tout en le faisant évoluer.

Pour définir un nouveau modèle économique, nous avons besoin de votre avis : merci de répondre à notre enquête (temps estimé : 5 minutes).

Participer maintenant
Participer plus tard J'ai déjà participé

  1. Heavy metal pollution in soils and sediments of Rural Developing District 063, Mexico.

    Article - En anglais

    For over 100 years the Rural Developing District 063 (RDD-063), which is located in Hidalgo State, has received wastewater without treatment from Mexico City.

    This wastewater has been used as irrigation water in agriculture, so high amounts of toxic substances have been deposited in the soils and sediments of this area, including heavy metals.

    Heavy metals are not biodegraded and persist in the environment for long time, so the goal of this study was to evaluate the bioavailable concentration of four heavy metals (Cd, Co, Cr, and Pb) by atomic absorption spectrophotometry during three sampling periods in 1993.

    The results show increasing levels of cadmium and lead during July (second sampling period), while cobalt had its highest level in March (first sampling period).

    Finally, chromium data presented an irregular pattern during the whole year.

    The high levels of these elements indicate major pollution problems in RDD-063, which may represent increased health risks for humans and animals.

    Mots-clés Pascal : Eau usée urbaine, Irrigation, Agriculture, Pollution sol, Sédiment, Mesure concentration, Métal lourd, Biodisponibilité, Plomb, Cadmium, Chrome, Cobalt, Mexique, Amérique Centrale, Amérique

    Mots-clés Pascal anglais : Urban waste water, Irrigation, Agriculture, Soil pollution, Sediments, Concentration measurement, Heavy metal, Bioavailability, Lead, Cadmium, Chromium, Cobalt, Mexico, Central America, America

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 97-0029833

    Code Inist : 001D16D02. Création : 21/05/1997.