Geochemical Changes in Ground Water Due to Landfill Gas Effects

摘要: Concentrations of dissolved inorganic constituents commonly monitored in ground waters at landfills were evaluated during and after a period landfill gas effects on the water. Landfill can potentially act as an acid or reducing agent (Lewis base) due to its carbon dioxide methane content, respectively. Ground water data from single gas-affected well used evaluate correlation total volatile organic compound (VOC) concentration (as general measure effects) with bicarbonate alkalinity, ammonia, calcium, iron, magnesium, manganese, sodium, chloride, sulfate concentrations. Bicarbonate magnesium concentrations correlated VOC The calcium is attributed increased dissolution carbonate minerals by carbonic dioxide. Total manganese also increasing content. This reduction (IV) aquifer gas. No detectable iron was observed successful corrective action, suggesting that redox potential not sufficiently low reduce (III) minerals. There no between concentrations, there insufficient ammonia detections evaluate. are expected depend particular mineralogy quality site. These results basic chemical principles, however, suggest could cause increase without increases sodium chloride many sites. Because municipal solid waste leachate typically characterized significantly elevated relative background be differentiated lack accompanying detections.