Division of Wood Chemistry, Forest Products Department, National Institute of Forest Science, 57 Hoegiro, Dongdaemun-gu, Seoul, 02455, Republic of Korea.
Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
J Hazard Mater. 2020 Feb 15;384:121356. doi: 10.1016/j.jhazmat.2019.121356. Epub 2019 Sep 30.
Concerns over the disposal of preservative-treated wood waste and its related environmental problems are the main driving forces of research into the recycling of preservative-treated wood. Preservative-treated wood waste composed of cellulose, hemicellulose, and lignin with several types of heavy metals can be recycled in various ways, such as wood-based composites, heavy metal extraction, energy recovery, etc. In particular, thermochemical conversion has attracted considerable attention recently because energy can be recovered from biomass as liquid fuel and bio-oil, as well as produce bio-char with a high carbon content, which can be applied to valuable products, such as soil amendment, adsorbents, solid fuels, and catalyst supports. On the other hand, environmental issues, such as heavy metal volatilization and heavy metal leaching, are still a challenge. This review reports the state-of-the-art knowledge of biochar production from preservative-treated wood with the main focus on the feedstock, process technology, biochar characteristics, application, and environmental issues. This review provides important information for future studies into the recycling of preservative-treated woods into biochar.
对防腐剂处理木材废物的处理及其相关环境问题的担忧是研究防腐剂处理木材回收的主要驱动力。含有纤维素、半纤维素和木质素以及多种类型重金属的防腐剂处理木材废物可以通过多种方式回收，例如木质复合材料、重金属提取、能量回收等。特别是，热化学转化最近引起了相当大的关注，因为可以从生物质中回收能量作为液体燃料和生物油，并产生高碳含量的生物炭，可应用于有价值的产品，如土壤改良剂、吸附剂、固体燃料和催化剂载体。另一方面，重金属挥发和重金属浸出等环境问题仍然是一个挑战。本文综述了从防腐剂处理木材生产生物炭的最新知识，主要集中在原料、工艺技术、生物炭特性、应用和环境问题上。本文为未来将防腐剂处理木材回收成生物炭的研究提供了重要信息。
