Effect of aeration disturbance on humus in sediment of black and odorous water body
Taking rural black and odorous water body as the research object,the effects of different aer-ation treatment methods on the content of humus components in sediments were studied by combining three-dimensional fluorescence spectroscopy(EEMs),uV-VIS and Fourier infrared spectroscopy(FT-IR),and the spectral characteristics of humus were discussed under different aeration methods.The re-sults showed that compared with the control group,the content of fulic acid decreased,the content of humic acid and humacin increased,the total humus content increased by 0.99～2.34 g/kg,and the PQ value(humus index)increased by 4.08％～7.82％,reflecting the increase of lake productivity,the in-crease of biomass in the system and the accumulation of humus after aeration.After the aeration treat-ment,the fluorescence characteristic peak and the ultraviolet absorption peak intensity were reduced,and the infrared spectral absorption peak intensity was increased.After aeration treatment,the intensi-ty of fluorescence characteristic peak and ultraviolet absorption peak decreased,while the intensity of infrared absorption peak increased.After sludge aeration treatment,the intensity of six infrared ab-sorption peaks increased,which were higher than those of water aeration group.
aerationrural black and odorous water bodyhumus component of sedimentspectral characteristics
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