Research and Development of Carbon-Based Materials for Environment Clean-Up from Wood Wastes by Thermal Conversion

为了利用木材工业的间伐物、残余物和废料、林业废料和未使用的木材品种开发新的功能材料，研究和开发碳基材料，通过热转化从木炭或木材废料中清除环境污染。开发了新的间伐集材系统和木材建筑物拆除废物和木材工业废物和残留物收集系统。本文还研究了一种新的炭化体系，在60 ~ 2800 ℃的温度范围内，在N_2或Ar气流中炭化的杉木间伐材的炭化特性。随着炭化温度的升高，木炭的导电性、导热性和吸附性发生了显著的变化。探讨了炭化温度与木炭光催化反应的关系。研究了用杉炭材料吸附不同浓度水溶液中Hg、Zn、Cr、As、Cd、Pb等重金属的可能性。研究了碳化温度对污染水体中Hg、Zn、Pb、Cr、Cd和As选择性吸附的影响。研究和讨论了炭和炭与金属氧化物的碳基复合材料去除NOx或将其转化为无害气体的方法。本文还研究和讨论了异丙醇作为有机清洗液在活性炭吸附相中的吸附作用，应用于电器工业和精密机械工业。以木材废弃物为原料制备新型炭基材料用于环境净化的可能性正在研究和开发中。

In order to develop newly functional materials utilizing wood thinnings, residues and wastes from wood industries, forestry wastes and unused wood species, research and development studies on carbon-based materials for environmental clean-up from charcoal of wood wastes by thermal conversion. New yarding systems of thinnings and gathering systems of wastes from deconstruction of wood building and of wastes and residues from wood industries are developed. A new carbonization system is also development.Characteristics of wood charcoals of sugi thinnings carbonized at a temperature range of 60ﾟC to 2800ﾟC under N_2 or Ar gas flow is done. Electric conductivity, thermal conductivity and properties of adsorption of wood charcoal are drastically changed with a rise in carbonization temperature. Relationships between carbonization temperature and photo catalytic reactions of wood charcoal are examined and discussed. The possibility of utilizing charcoal materials from sugi for adsorbing heavy metals like Hg, Zn, Cr, As, Cd and Pb from aqueous solutions of different concentrations are researched. Relationships of carbonization temperature to the selective adsorption of Hg, Zn, Pb, Cr, Cd and As from a polluted water are found and discussed. Removal of NOx or its conversion into harmless gases by charcoals and carbon-based composites of charcoals and metal oxides are examined and discussed. Adsorption of isopropyl alcohol as an organic cleaning solution under charcoal adsorbance phases for the electric divices industries and precision machinery industries is also examined and discussed. The possibility of newly carbon-based from charcoals of wood wastes for environment clean-up is researching and developing.