| 王 昶,彭招弟,薛智芸,张苑芳.蛭石类Fenton体系催化降解愈创木基木素模型物的研究[J].中国造纸学报,2016,31(1):27-31 |
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| 蛭石类Fenton体系催化降解愈创木基木素模型物的研究 |
| Study on Fenton-like Oxidation of Guaiacol Catalyzed by Vermiculite |
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| DOI：10.11981/j.issn.1000-6842.2016.01.27 |
| 中文关键词: 蛭石类Fenton 愈创木酚 高级氧化技术 |
| Key Words:vermiculite Fenton-like guaiacol advanced oxidation technology |
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| 中文摘要: |
| 以愈创木酚作为造纸废水中主要污染物愈创木基木素的模型物,以天然蛭石作为类Fenton反应的催化剂,通过扫描电镜-X射线能谱仪、激光粒度分析仪等分析了蛭石的基本性质,考察了蛭石粒径及用量、H2O2用量、pH值等因素对蛭石类Fenton体系催化降解愈创木酚效果的影响。结果表明,蛭石中铁元素含量约为13.6%～20.4%；研磨后，蛭石粒径变小,比表面积增大,蛭石仍保持微观层状结构，但表面孔数量增多；在蛭石研磨10 min及其用量2.0 g/L、H2O2用量1.3 mmol/L、pH值为3的条件下,反应180 min后，质量浓度50 mg/L愈创木酚的去除率接近100%。 |
| Abstract: |
| The degradation of guaiacol, the model compound of guaiacol lignin by Fenton-like oxidation catalyzed with vermiculite was studied. The characteritics of ground and unground vermiculite were analyzed by EDS, SEM and scattering laser particle analyzer. EDS analysis showed that the mass content of iron in vermiculite was about 13.6%~20.5%, SEM images showed that there were many micro pores in the lamellar structure of vermiculite, and the size test showed that the particle size decreased while specific area increased when the vermiculite was ground. A series of experiments were conducted to investigate the influence of oxidation condition on the degradation of guaiacol, such as vermiculite dosage, H2O2 dosage, initial pH of reaction system and the initial concentration of guaiacol solution. The removal rate of guaiacol almost reached 100% within 180 min at pH=3 when the dosage of H2O2 and vermiculite were 1.3 mmol/L and 2.0 g/L, respectively. Comparing with the conventional Fenton-process, the advantages of Fenton-like oxidation catalyzed by vermiculite included using less H2O2 dosage, the catalyst vermiculite is less expensive and easy to obtain, and its resource is rich. |
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