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Reduction of Nitrate by Bimetallic Fe/Ni Nanoparticles£¬Environmental Technology, 2012, 33(18): 2185-2192 Âé·³°ïæ²éÒ»ÏÂÊÇ·ñ±»ÒýÓã¬Èç±»ÒýÓ㬴ÎÊýÊǶàÉÙ£¬·Ç³£¸Ðл£¡£¡£¡£¡ |
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Reduction of nitrate by bimetallic Fe/Ni nanoparticles ×÷Õß:Kang, HY (Kang, Haiyan)[ 1 ] ; Xiu, ZM (Xiu, Zongming)[ 2,3 ] ; Chen, JW (Chen, Jiawei)[ 4 ] ; Cao, WP (Cao, Wenping)[ 5 ] ; Guo, YF (Guo, Yifei)[ 1 ] ; Li, TL (Li, Tielong)[ 3 ] ; Jin, ZH (Jin, Zhaohui)[ 3 ] ENVIRONMENTAL TECHNOLOGY ¾í: 33 ÆÚ: 18 Ò³: 2185-2192 DOI: 10.1080/09593330.2012.665486 ³ö°æÄê: 2012 ²é¿´ÆÚ¿¯ÐÅÏ¢ ÕªÒª Bimetallic Fe/Ni nanoparticles were synthesized and their nitrate reduction capacity was studied. Nitrate (354 mg L-1, equal to 5.71 mmol L-1) reduction was performed using Fe/Ni nanoparticles with various Ni contents (1.0, 5.0, 10 and 20%) in an unbuffered condition. Optimum nitrate reduction rate (1.03 +/- 0.087 x 10(-4) mol . min(-1) . g(reduc)(-1)) was obtained with 5.0% nano-scale Fe/Ni, while only 25% nitrate (1.05 +/- 0.091 x 10(-5) mol . min(-1) . g(reduc)(-1)) was transformed by nano-scale Fe-0 within the same reaction time, which means that these bimetallic nanoparticles are obviously more reactive than monometallic nano-scale Fe-0. For this bimetallic system a near-neutral initial pH (6.5) is more favourable than an acidic condition (2.0 and 4.0). Relatively air-stable nano-scale Fe/Ni particles were developed by slowly aging them for 22 h and exhibited similar reactivity to freshly synthesized nano-scale Fe-0. Although undesirable transformation of nitrate (91.0 +/- 0.37%) to ammonium was observed in this study, Fe/Ni particles showed a much higher nitrate reduction rate and an optimum reduction rate at near-neutral pH, which may have important implications for nitrate-contaminated site remediation. ¹Ø¼ü´Ê ×÷Õ߹ؼü´Ê:Fe/Ni; Fe-0; nanoparticle; nitrate; reduction; stability KeyWords Plus:NANOSCALE IRON PARTICLES; ZERO-VALENT IRON; COMPLETE DECHLORINATION; CATALYTIC-REDUCTION; CHEMICAL-REDUCTION; AQUEOUS-SOLUTION; DRINKING-WATER; REMOVAL; KINETICS; TRICHLOROETHYLENE ×÷ÕßÐÅÏ¢ ͨѶ×÷ÕßµØÖ·: Kang, HY (ͨѶ×÷Õß) Henan Univ Urban Construct, Dept Environm & Municipal Engn, Pingdingshan City, Peoples R China. µØÖ·: [ 1 ] Henan Univ Urban Construct, Dept Environm & Municipal Engn, Pingdingshan City, Peoples R China [ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ] [ 2 ] Rice Univ, Dept Civil & Environm Engn, Houston, TX USA [ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ] [ 3 ] Nankai Univ, Coll Environm Sci & Engn, Tianjin 300071, Peoples R China [ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ] [ 4 ] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing, Peoples R China [ 5 ] Xuzhou Inst Technol, Dept Environm Engn, Xuzhou, Peoples R China µç×ÓÓʼþµØÖ·:kanghaiyan1979@yahoo.com.cn; chenjiawei@cugb.edu.cn »ù½ð×ÊÖúÖÂл »ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ Fundamental Research Funds for the Central Universities 2010ZD14 2010ZD13 National Program of Control and Treatment of Water Pollution 2009ZX07424-002 Program for New Century Excellent Talents in University NCET-07-0769 China Geological Survey Ke [2011]-01-66-07 ²é¿´»ù½ð×ÊÖúÐÅÏ¢ ³ö°æÉÌ TAYLOR & FRANCIS LTD, 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND Àà±ð / ·ÖÀà Ñо¿·½Ïò:Environmental Sciences & Ecology Web of Science Àà±ð:Environmental Sciences ÎÄÏ×ÐÅÏ¢ ÎÄÏ×ÀàÐÍ:Article ÓïÖÖ:English Èë²ØºÅ: WOS:000310134900014 PubMed ID: 23240214 ISSN: 0959-3330 ÆÚ¿¯ÐÅÏ¢ Ŀ¼£º Current Contents Connect® Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports® ÆäËûÐÅÏ¢ IDS ºÅ: 024UO Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 37 Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 1 |
3Â¥2015-09-24 22:57:44
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