摘要
对木质素磺酸盐在紫外光/双氧水(UV/H2O2)体系下的降解过程进行了研究,通过对比处理前后木质素磺酸盐溶液的紫外可见光谱、凝胶渗透色谱(GPC)谱图、红外光谱谱图、1H NMR谱图及溶液化学耗氧量(COD)的变化对其降解过程进行了跟踪和讨论。此外,通过对木质素的模型化合物——愈创木酚降解的研究,推测了降解中苯环的开环过程。实验结果表明,木质素磺酸盐在UV/H2O2体系处理下能够发生降解,降解过程中首先生成一些中间产物,随着反应时间的加长,最终能够降解成CO2、H2O等小分子化合物。
Lignosulfonate was treated in a ultraviolet irradiation/hydrogen peroxide （UV/H2O2 ） system. The degradation of lignosulfonate during this process was traced and investigated by UV-vis, GPC, IR, ^1H NMR speetroseopy and COD methods. The effect of H2O2 concentration on the degradation of lignosulfonate was discussed. A possible reaetion mechanism of the degradation was proposed. The results showed that being treated in the UV/H2O2 system, lignosulfonate was degraded and transformed into some intermediate compounds firstly, and small molecular products such as carbon dioxide and water were formed finally. Moreover, the degradation rate of lignin was increased with increased H2O2 concentration.
出处
《林产化学与工业》
EI
CAS
CSCD
2007年第3期98-102,共5页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(50521302
50473057)
中国科学院优秀博士学位论文启动基金(无编号)
