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Reduction of Nitrate by Bimetallic Fe/Ni Nanoparticles£¬Environmental Technology, 2012, 33(18): 2185-2192
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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

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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
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ÎÄÏ×ÀàÐÍ:Article

ÓïÖÖ:English

Èë²ØºÅ: WOS:000310134900014

PubMed ID: 23240214

ISSN: 0959-3330
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    Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports®

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