Organic Matter Composition in Sediments of the Baiyangdian Lake in China

Abstract

Abstract The content and composition of organic matter (OM) in four areas(contrast area, aquaculture area, aquatic area and sewage area)of Baiyangdian lake are studied by using physical chemistry methods. The main objective of the study is to provide theoretical data for the management of Baiyangdian lake eutrophication. Compared with contrast area, aquaculture area and aquatic area sediment shows significantly higher concentrations of total organic matter in sewage area. These results suggest that more serious organic pollution in the sewage area sediment. Irrespective of the higher content of total organic matter, the light fraction organic matter (LFOM) is very low in four sample stations. Heavy fraction organic matter (HFOM) is the dominant class among organic matter composition in contrast area aquaculture area aquatic area and sewage area sediments contributing 85.80%, 87.7%, 78.71% and 85.00% respectively. These results indicate that HFOM account for most of organic matter while LFOM was completely decomposed. Correlation analysis of organic matter shows that labile organic matter (LOM), dissolved organic matter (DOM), LFOM and HFOM have remarkable positive correlation between them respectively.