摘要
为了寻找更适合于废弃CCA防腐木材的回收处理方法,该文采用正交试验方法,研究了液化时间、温度、硫酸和磷酸加入量对樟子松CCA防腐处理木材苯酚液化效率的影响,并对液化后残渣中的铜、铬、砷去除率进行测定和分析,得到了CCA防腐处理木材的苯酚液化优化工艺参数和金属元素去除率的优化工艺参数。结果表明:①温度160℃、时间2 h、磷酸和硫酸加入量分别为1%和2%时,CCA防腐木材的苯酚液化残渣率可达到10.67%。②当温度160℃、时间1 h、磷酸和硫酸加入量分别为3%和4%时,CCA防腐木材中的金属去除效果最好,铜去除率达到100%,铬去除率为99.34%,砷去除率为42.73%。
In order to find a suitable method to recycle preservative-treated waste to protect environment and to increase the utilization of wood, this research focuses on the optimum liquefaction processing parameters of CCA-treated wood in phenol and on the optimum metals （Cu, Cr and As） removing processing parameters for CCA-treated wood. The effects of liquefaction time, temperature, concentration of sulfuric acid and phosphoric acid on the liquefaction and the corresponding metals removing rate were discussed in this paper. The results indicated that the optimum conditions of liquefaction for CCA-treated wood in phenol were： reaction temperature of 160℃, reaction time of 2 hrs, phosphoric acid content of 1% and sulfuric acid content of 2 %, and 10.67% residue rate could be obtained. Under the processing parameters of temperature 160℃, the reaction time of 1 hour, phosphoric acid content of 3 % and sulfuric acid content of 4 %, the best metal removing rate of Cu, Cr and As could be reached up to 100%, 99.34% and 42.73%, respectively.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2009年第3期111-115,共5页
Journal of Beijing Forestry University
基金
"十一五"国家科技支撑计划项目(2006BAD18B0905)
关键词
CCA防腐木材
苯酚液化
金属去除率
优化工艺
CCA-treated wood
liquefaction in phenol
removing rate of metals
optimum technology
作者简介
张求慧，博士，副教授。主要研究方向：木材科学与技术。电话：010-62336314Email：qhzh66@163．com地址：100083北京林业大学材料科学与技术学院。
