东北黑土区水库底泥有机无机复合体组成特性研究——以长春市新立城水库为例

为了探讨静水湖泊底泥中有机碳的分布特征及其与周边土壤的关系,同时为研究湖库中的有机污染状况提供理论依据,以长春市新立城水库底泥和水库周边土壤为供试材料,采用颗粒大小分组法分离复合体,研究东北黑土区水库底泥的有机无机复合体组成及有机碳的分布特征。结果表明,底泥中粘粒复合体平均含量为65%,粉粒为18.7%,砂粒为3.1%;而其周边土壤的平均含量分别为粘粒28.8%、粉粒29.5%、砂粒31%;底泥全土的有机碳平均含量为17.4g/kg,对照土壤为15.4g/kg,底泥各粒级复合体有机碳含量分别为粘粒24.7g/kg、粉粒14.4g/kg、砂粒1.84g/kg,土壤分别为30.6g/kg、粉粒13.63g/kg、砂粒2.67g/kg;底泥的HA/FA平均值为1.24,土壤为1.78。由此可以看出,底泥的有机无机复合体组成以粘粒复合体为主,粉粒复合体含量次之,砂粒复合体含量最少;底泥的有机碳平均含量高于土壤,底泥的粘粒级复合体的有机碳含量全部高于土壤,而底泥的粉粒复合体和砂粒复合体有机碳含量均低于对照土壤;底泥的HA/FA都小于对照土壤。

Study on the Composition Characteristics of Sediment Organic-mineral Complex in Reservoir of Northeast Black Soil Zone ——Take Xinlicheng Reservoir of Changchun City as an Example

In order to discuss the distribution features of organic carbon of the static water lakes sediment and the surrounding soil relationship,and to provide the theory basis for studying organic pollution condition of the library lake,this article researched the characteristic of reservoir sediment in the black soil region of Northeast China whose organic-mineral complex composing and organic carbon distributing,by the tested materials in Changchun City of Xinlicheng Reservoir sediment and reservoir surrounding soil,through the way of particle size fractionation for the separation of complex.The results indicated that,the substrate sludge stuck in the average level of complexes for 65% of 18.7% for the face,and by 3.1% to sand,and its surrounding soil of the average concentration of clay,silt,sand were 28.8%,29.5%,31%,the total soil organic carbon in sediment content average was 17.4 g/kg,contrast of soil for 15.4 g/kg,the grain size of sediment organic carbon content of the clay complex were 24.7 g/kg,14.4 g/kg powder,sand 1.84 g/kg,soil were 30.6 g/kg,13.63 g/kg powder,sand for 2.67 g/kg,sediment was on the mean value of 1.24 HA/FA,soil was 1.78.From this we can see that on the composition of organic-mineral complex in clay complex mainly,complex content of powder second,complex content of sand at least.The sediment organic carbon content was higher than that of soil,sediment clay grade complex organic carbon content were all higher than the soil,while the sediment particle complexes and sand complex organic carbon content were lower than those of contrast soil,on the HA/FA are smaller than those in the contrast of soil.