| 摘要: |
| 通过共沉淀法制备纳米Fe2O3-SnO2光催化剂，采用XRD、SEM等测试手段对其进行形貌、物象、粒径一系列的表征，研究结果显示制得的催化剂仍保持纯SnO2四方金红石型结构. 研究了Fe2O3-SnO2光催化剂投加量、Fe2O3与SnO2物质的量比、煅烧温度、煅烧时间、氨氮初始浓度、pH值、H2O2浓度以及光照反应时间等因素对海水养殖废水中氨氮降解效率的影响.在紫外光照射下进行正交实验，确定最优化反应条件：催化剂投加量为0.4 g/dm3 ，煅烧时间为3 h，物质的量比为1∶2，氨氮初始含量为50 mg/dm3，光照反应时间为2 h.这5个因素对Fe2O3-SnO2光催化氧化速率影响的大小程度依次为：Fe2O3与SnO2物质的量比>煅烧时间> Fe2O3-SnO2光催化剂投加量> 氨氮初始浓度>光照时间.氨氮去除率可以达到85.1%，相同条件可见光下也可达到82.3%. |
| 关键词: 纳米Fe2O3-SnO2 海水养殖废水 光催化 氨氮 |
| DOI：10.3969/J.ISSN.2095-4972.2018.01.009 |
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| 基金项目:山东省自然科学基金资助项目（ZR2017BEM034）；山东省科技发展计划资助项目（2014GGX102006）；山东省高等学校科研发展计划资助项目（J17KB076）；山东省高等学校科研计划资助项目（J16LA56） |
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| Photocatalytic degradation of ammonia nitrogen in mariculture wastewater with nanometer Fe2O3-SnO2 |
| JIN Xiao-jie,LIU Ji-chen,ZHANG Tao,LI Yang,WANG Ping,CHENG Ren-ce |
| (Material Department in College of Engineering，Yantai nanshan University，Yantai 265713，China;Shandong nanshan Aluminium Industry Company Limited By Shares，Yantai 265713，China) |
| Abstract: |
| Fe2O3-SnO2 photocatalysts were synthesized by co-precipitation method. The morphology and crystal pattern of some prepared catalysts were characterized by XRD and SEM techniques which demonstrated that the prepared catalysts were quartet rutile structure. The effects of different factors on the degradation efficiency of ammonia nitrogen in mariculture wastewater were investigated, including Fe2O3-SnO2 catalyst dosage, the molar ratio of Fe2O3 and SnO2 , calcination temperature, calcination time, the initial concentration of ammonia-N, pH value, the concentration of H2O2 and catalytic reaction time. An orthogonal experiment was carried out under UV-light. The optimal combinations were confirm with results that the dosage of catalyst was 0.4 g/dm3, calcination time was 3.0h, the molar ratio of Fe2O3 and SnO2 was 1∶2, initial concentration of ammonia-N was 50mg/dm3 and photocatalytic degradation reaction time was 2.0h. The influence orders of degradation are listed as follows, the molar ratio of Fe2O3 and SnO2 > calcination time> photocatalyst dosage> initial concentration of ammonia-N> reaction time. The removal rate of ammonia-N is capable to reach 85.1%, the removal rate of ammonia-N in seawater is expected to reach 82.3% under the same conditions. |
| Key words: marine chemistry nanometer Fe2O3-SnO2 mariculture wastewater photocatalysis ammonia nitrogen |
