| 引用本文: | 丁文川,李桥,梁国强,向星光,曾晓岚,苏晴.生物炭三维电极对水中氨氮的去除机理[J].哈尔滨工业大学学报,2016,48(8):131.DOI:10.11918/j.issn.0367-6234.2016.08.022 |
| DING Wenchuan,LI Qiao,LIANG Guoqiang,XIANG Xingguang,ZENG Xiaolan,SU Qing.Characteristics of ammonia removal from water using biochar three-dimensional electrode reactor[J].Journal of Harbin Institute of Technology,2016,48(8):131.DOI:10.11918/j.issn.0367-6234.2016.08.022 |
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| 生物炭三维电极对水中氨氮的去除机理 |
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丁文川1,2Symbol`@@,李桥1,梁国强1,向星光1,曾晓岚1,2,苏晴3
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(1.重庆大学 城市建设与环境工程学院, 重庆400045;2.三峡库区生态环境教育部重点实验室 (重庆大学), 重庆400045;3.重庆市环境工程评估中心, 重庆401121)
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| 摘要: |
| 为考察生物炭三维电极对水中氨氮的作用机制, 以生物炭为反应介质构建三维电极反应器, 研究其对无氯水体中氨氮的去除效果，并探究水中氨氮的转化机理.结果表明, 生物炭三维电极可以在短时间内对氨氮高效去除(氨氮初始质量浓度ρ0=100 mg/L, t=3 h, η=45.72%), 去除过程符合一级动力学模型, 且氨氮的转化过程是一个消耗OH-的反应过程.反应器系统中反应产物分析证明, 生物炭吸附作用对氨氮去除贡献甚微, 氨氮主要通过直接氧化和间接氧化作用得以去除, 最终转化为等量的N2和NO3--N而得以去除.
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| 关键词: 三维电极 生物炭 氨氮 去除机理 电化学 |
| DOI：10.11918/j.issn.0367-6234.2016.08.022 |
| 分类号:X703.1 |
| 文献标识码:A |
| 基金项目:国家水体污染控制与治理科技重大专项(2012ZX07102-001-004)；重庆大学大型仪器设备开放基金(201406150062) |
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| Characteristics of ammonia removal from water using biochar three-dimensional electrode reactor |
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DING Wenchuan1,2, LI Qiao1,LIANG Guoqiang1, XIANG Xingguang1, ZENG Xiaolan1,2, SU Qing3
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(1.School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China; 2. Key Laboratory of Three Gorges Reservoir Area’s Ecology and Environment Ministry of Education (Chongqing University), Chongqing 400045, China;3.Appraisal Center for Environment & Engineering of Chongqing, Chongqing 401121, China)
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| Abstract: |
| In order to investigate the removal mechanism of ammonia by biochar three-dimensional electrode, a lab-scale innovative three-dimensional electrode reactor using biochar as reactive media was established, and the removal trend and mechanism of ammonia (in non-chlorine water) during the reactor operation were investigated. Experimental results indicated that the biochar three-dimensional electrode reactor could achieve a high ammonia reduction in a short time (ρ0=100 mg/L, t=3 h, η=45.72%). The ammonia transform process is a hydroxyl consumption reaction, which fitted well with the first-order kinetic model well, and biochar adsorption contributed insignificantly on bulk ammonia removal, while the direct and indirect oxidation within the reactor would convert the ammonia nitrogen to gaseous nitrogen and nitrate nitrogen instead.
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| Key words: three-dimensional electrode biochar ammonia nitrogen removal mechanism electrochemistry |
