THE STABLE ISOTOPE OF HYDROGEN AS AN INDICATOR OF MEDIOUNA LANDFILL LEACHATE POLLUTION (Casablanca, Morocco)

摘要

Since 1986 the municipal solid wastes produced by the city of Casablanca are stockpiled in Mediouna landfi ll installed on old quarries without liner or leachate collection system. A previous study had showed an advance of the pollution plume from landfi ll, according to the faults affecting the fractured aquifer matrix. The aim of our study is to use the unique isotopic characteristics observed in landfi ll leachate as an indicator for confi rming whether contamination is from landfi ll or some other local sources. Oxygen-18 and deuterium investigation was undertaken on samples collected, from wells upstream and downstream the landfi ll. Compared to hydrogen and oxygen isotopes of local precipitation samples of some wells show an enrichment of hydrogen isotope values. This data is used to delimit pollution plume extension.The deuterium is useful as an environmental indicator for municipal landfill pollution.