The total extractable quantity (by 10% of 0.1 mol/L NaOH, after 4 h of mixing) decreased linearly, while the HA/FA increased linearly,with increasing landfill age;

• 研究结果表明,填埋垃圾腐殖质的总可提取率和胡敏酸(HA)与富里酸(FA)比值(HA/FA)分别随填埋龄呈线性下降和上升趋势。