| 引用本文: | 杨基先,王蕾,郭海娟,马放.Fe3O4-H2O2类Fenton体系催化降解苯酚[J].哈尔滨工业大学学报,2014,46(12):39.DOI:10.11918/j.issn.0367-6234.2014.12.007 |
| YANG Jixian,WANG Lei,GUO Haijuan,MA Fang.Catalyzed degradation of phenol by Fe3O4-H2O2 Fenton like system[J].Journal of Harbin Institute of Technology,2014,46(12):39.DOI:10.11918/j.issn.0367-6234.2014.12.007 |
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| Fe3O4-H2O2类Fenton体系催化降解苯酚 |
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杨基先1, 王蕾1,2,郭海娟1,3 , 马放1,2
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(1. 城市水资源与水环境国家重点实验室(哈尔滨工业大学), 150090 哈尔滨;2. 哈尔滨工业大学宜兴环保研究院, 214205 江苏 宜兴; 3. 台州学院, 318000 浙江 台州)
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| 摘要: |
| 为提出基于新型磁纳米Fe3O4催化剂的类Fenton体系,采用化学共沉淀法制备磁纳米Fe3O4,用四甲基氢氧化铵（TMAH）对所制备的磁纳米Fe3O4进行表面改性,就Fe3O4-H2O2类Fenton体系对苯酚废水的处理效果进行探讨,考察催化剂投量、H2O2浓度、pH、反应时间等因素对COD和挥发酚去除率的影响. 结果表明：磁纳米颗粒平均粒径为30 nm,并在20~100 nm内呈现良好的粒度分布. 不同剂量TMAH包覆的3种催化剂经超声预处理后,在室温（13 ℃）下对50 mg/L苯酚（相当于112 mg/L COD）的降解效果基本一致. 当催化剂投量为0.8 mmol/L、H2O2浓度为2.0 mmol/L、pH为4.5、反应时间180 min时,COD去除率最高可达72%；催化剂投量为0.4 mmol/L、H2O2浓度为2.0 mmol/L、 pH为4.5、反应时间为90 min时,挥发酚的去除率接近100%. 而在重复使用方面,3# Fe3O4-TMAH（2 mL）催化剂的回用性最好,4次反应COD的去除率分别为73%、29%、28%、26%,挥发酚去除率分别为100%、84%、67%、54%. 该类Fenton体系具有不产生多余泥量的优点,且磁纳米催化剂在外磁场作用下可实现快速分离回收. |
| 关键词: 磁纳米Fe3O4 类Fenton体系 催化降解 苯酚 |
| DOI：10.11918/j.issn.0367-6234.2014.12.007 |
| 分类号:X703 |
| 基金项目:水专项：阿什河流域水污染综合治理技术及工程示范(2012ZX07201-003);城市水资源与水环境国家重点实验室(哈尔滨工业大学)开放课题(QA201319). |
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| Catalyzed degradation of phenol by Fe3O4-H2O2 Fenton like system |
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YANG Jixian1, WANG Lei1,2, GUO Haijuan1,3, MA Fang1,2
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(1.State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology), 150090 Harbin, China; 2. HIT Yixing Academy of Environmental Protection, 214205 Yixing, Jiangsu, China; 3. Taizhou University, 318000 Taizhou, Zhejiang, China)
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| Abstract: |
| To put forward a Fenton-like system based on a new type of Fe3O4 magnetic nanoparticles catalyst, Fe3O4 magnetic nanoparticles were prepared using chemical co-precipitation , and their surface was modified with tetramethyl ammonium hydroxide (TMAH). The catalyzed degradation of phenol by Fe3O4-H2O2 Fenton-like system was investigated, including the effect of catalyst dosage, H2O2 dosage, pH value and reaction time on the removal of COD and volatile phenol. The results showed that the mean size of the Fe3O4 nanoparticles is 30 nm and they show a good disparity between 20 and 100 nm. Three different doses of TMAH coated catalysts after ultrasonic pretreatment, revealed almost the same treatment efficiency of 50 mg/L phenol (112 mg/L COD equivalent) under the room temperature (13 ℃). Under the condition of 0.8 mmol/L catalyst dosage, 2.0 mmol/L H2O2 dosage, pH 4.5 and the reaction time of 180 minutes, the highest COD removal efficiency was 72%; while under the condition of 0.4 mmol/L catalyst dosage, 2.0 mmol/L H2O2 dosage, pH 4.5 and the reaction time of 90 minutes, the removal rate of volatile phenol was close to 100%. 3# Fe3O4-TMAH（2 mL）catalysts revealed optimal reuse efficiency, the removal rate of COD were 73%,29%,28%,26%, the removal rate of volatile phenol were 100%,84%,67%,54%. The Fenton-like system has the advantage of no redundant excess sludge producing, and the magnetic catalyst can realize quick separation and recycling under the action of outside magnetic field. |
| Key words: Fe3O4 magnetic nanoparticles Fenton-like system catalyzed degradation phenol |
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