【摘要】 采用分层随机采样法采集上海老港填埋场填埋6～10a的陈腐垃圾,研究其有机碳含量的变化规律。陈腐垃圾由于含有大量含碳干扰物质,用TOC仪器法测定的结果(7.72%～15.33%)高于重铬酸钾容量法测定结果(5.64%～8.49%),但不同填埋时间陈腐垃圾有机碳含量变化趋势相同即填埋时间越长有机碳含量越高。不同氧化条件下重铬酸钾容量法中Tyurin法测得陈腐垃圾样品有机碳浓度最低,且存在由于加热时间较短不易于精确控制造成重复测定样品相对偏差较大的缺点;通过比较研究Hach公司推荐方法和Mebius法对含碳干扰物质的回收率,认为Hach公司推荐方法(105℃加热120min)测定陈腐垃圾有机碳结果最接近陈腐垃圾腐殖质碳含量。更多还原

【Abstract】 TOC determination is one of important method for aged refuse quantitative characterization.Multi-layer random sampling system used for aged refuse extraction in Shanghai MSW Landfill was proved to meet the request of error control on TOC determination.TOC values of aged refuse obtained by instrumental method(7.72%～15.33%) were,although,quite greater than those obtained by K2Cr2O7 oxidation method due to the presence of carbon interferents,the same obvious trend was observed.In the series of K2Cr2O7 oxidation methods,the condition recommended by Hach Company(heated for 120 min at 105 ℃) was considered as the preferable alternative because its results should be closest to humic substances carbon content in comparison with other methods.更多还原