海浜砂中における水分と有機物分解性の関係
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概要
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The tide fluctuates twice a day and the water content of the intertidal zone sediment changes with it. In order to assess the biodegradability of the sediment organics it is important to know the effect of water content on the rate of aerobic biodegradation in the sediment.Biodegradability of organics in beach sands was measured over a water content range from 0 to 100% (g H2O/g dry soil). The amount of CO2 generated was used as an index of decomposition. This experiment was done four times changing carbon sources (Gracilaria powder, artificial sewage) and incubation conditions (still, shaken).In all cases the rate of degradation became lower when the water content was less than 10%. And oxygen depletion seemed to affect the degradation rate when the sand was saturated with water.When artificial sewage was used sand seemed to stimulate the degradation notably but in case of Gracilaria powder we couldnt detect such an effect. A possible explanation is that a particle like sand doesnt affect particulate organics such as Gracilaria powder so much.
- 社団法人 日本水環境学会の論文
- 1995-05-10