Transport of ammonia nitrogen for groundwater pollution control in an informal low-permeability landfill site

Abstract In informal landfills, leachate leaked into the underlying soil and groundwater has been gaining increasing attention. Recently, an low-permeability landfill site in northern China was investigated detail, it found that contaminated by leachate. A flow contamination transport model developed using FEFLOW to forecast contaminant evaluate feasible pollutant control schemes. this model, good matches between simulated observed level concentration of ammonia nitrogen show established can reproduce process movement effectively. Three kinds schemes, including natural conditions, pollution source removal, pump treatment, were simulated, results compared. The showed that, under does not travel far horizontally vertically. Removal sources little effect on over a period 100 years. treatment system effectively remove high concentrations site, with maximum decline 90%. Therefore, method may be valid for short-term remediation.