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本文以国家级土地复垦示范区徐州市煤矿塌陷区为研究区域,研究复垦土壤中有机碳和黑碳含量的变化,对解释复垦土壤质量变化规律,改善矿区土壤复垦工艺,促进矿区土壤的可持续利用具有一定的意义。本研究采集了煤矸石填充、混推平整复垦、泥浆泵填充和粉煤灰填充4种复垦方式土壤,并以塌陷区土壤作为对照,利用元素分析仪、重铬酸钾滴定法等方法,对其中的有机碳和黑碳的含量进行测定,结果表明:复垦方式对塌陷区土壤有机碳和黑碳的含量具有一定的影响,在粉煤灰填充方式中,土壤中不同深度的有机碳和黑碳含量变化最大;对四种复垦方式不同深度土层黑碳和有机碳含量进行回归分析,均可发现黑碳含量与有机碳的含量达到显著水平。所以研究区黑碳占有机碳的比例与有机碳的累积无明显关系。
In this paper, the coal mine subsidence area of Xuzhou City, a national land reclamation demonstration area, is taken as the research area to study the changes of organic carbon and black carbon content in the reclaimed soil, to explain the variation law of reclaimed soil quality, to improve the mining reclamation process and to promote the mining area The sustainable use of soil has some significance. In this study, four soil reclamation methods were collected, including gangue filling, mixing and leveler reclamation, mud pump filling and fly ash filling. Soil was used as a control in the subsidence area. Elemental analysis, potassium dichromate titration , The contents of organic carbon and black carbon in the soil were determined. The results showed that the reclamation method had a certain impact on the contents of soil organic carbon and black carbon in the subsidence area. In the fly ash filling method, Carbon and black carbon content had the most change. Regression analysis of black carbon and organic carbon content of four reclamation ways showed that the content of black carbon and organic carbon reached a significant level. Therefore, the proportion of black carbon in organic carbon in the study area has no obvious relationship with the accumulation of organic carbon.