MDF (Medium Density Fiberboard) production processes produce a large amount of wood leachate as a hazardous waste. Wood leachate is a lignin-based waste material from the MDF production industry. It constitutes a potential environmental problem if discarded by penetrating into groundwater aquifers. Currently, there is no viable way for industrial MDF leachate waste to be transformed into environmentally friendly high value materials. The aim of this work was to present for the first time a novel approach which was successfully developed for the recovery of wood leachate industrial waste as a catalyst for the synthesis of UF adhesives for MDF panels. The leachates were examined by FTIR, ¹³C NMR, and DSC as well as by evaluating the properties of fiberboards bonded with liquid UF resins. In addition, the other aim of this work was to capture the free formaldehyde gas emitted by MDF panels. It was of interest determine whether an MDF bonded panel prepared with a UF resin catalyzed by the wood leachate would exhibit lower formaldehyde emissions and the lowest thickness swelling, while still presenting a relatively good performance. The direct reuse of the fiberboard industrial leachate in the experiments demonstrated that the preparation method of the UF bonded fiberboard was environmentally friendly and sustainable. Therefore, this work arrived at some interesting conclusions that may be used as a base for future work on the recycling and reuse of MDF waste.

MDF（中密度纤维板）生产过程会产生大量的木材浸出液作为危险废物。木材浸出液是来自中密度纤维板生产行业的木质素废料。如果通过渗入地下水含水层而丢弃，则会构成潜在的环境问题。目前，还没有可行的方法将工业中密度纤维板渗滤液废物转化为环保的高价值材料。这项工作的目的是首次提出一种新方法，该方法已成功开发用于回收木材渗滤液工业废物，作为合成用于中密度纤维板的超滤粘合剂的催化剂。渗滤液通过 FTIR 检测，¹³C NMR 和 DSC 以及通过评估与液体 UF 树脂粘合的纤维板的性能。此外，这项工作的另一个目的是捕获中密度纤维板释放的游离甲醛气体。确定用木材浸出液催化的 UF 树脂制备的 MDF 粘合面板是否会表现出较低的甲醛排放量和最低的厚度膨胀，同时仍然表现出相对良好的性能是很有趣的。实验中纤维板工业渗滤液的直接回用表明，超滤粘合纤维板的制备方法具有环保性和可持续性。因此，这项工作得出了一些有趣的结论，这些结论可用作未来中密度纤维板废物回收和再利用工作的基础。