Empirical gas emission and oxidation measurement at cover soil of dumping site: example from Malaysia

Abushammala, Mohammed; Basri, Noor; Basri, Hassan; Kadhum, Abdul; El-Shafie, Ahmed
June 2013
Environmental Monitoring & Assessment;Jun2013, Vol. 185 Issue 6, p4919
Academic Journal
Methane (CH) is one of the most relevant greenhouse gases and it has a global warming potential 25 times greater than that of carbon dioxide (CO), risking human health and the environment. Microbial CH oxidation in landfill cover soils may constitute a means of controlling CH emissions. The study was intended to quantify CH and CO emissions rates at the Sungai Sedu open dumping landfill during the dry season, characterize their spatial and temporal variations, and measure the CH oxidation associated with the landfill cover soil using a homemade static flux chamber. Concentrations of the gases were analyzed by a Micro-GC CP-4900. Two methods, kriging values and inverse distance weighting (IDW), were found almost identical. The findings of the proposed method show that the ratio of CH to CO emissions was 25.4 %, indicating higher CO emissions than CH emissions. Also, the average CH oxidation in the landfill cover soil was 52.5 %. The CH and CO emissions did not show fixed-pattern temporal variation based on daytime measurements. Statistically, a negative relationship was found between CH emissions and oxidation ( R = 0.46). It can be concluded that the variation in the CH oxidation was mainly attributed to the properties of the landfill cover soil.


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