Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (8): 137-141,146.doi: 10.3969/j.issn.1000-565X.2010.08.026

• Environment Science & Technology • Previous Articles     Next Articles

Catalytic Reduction of Nitrate Nitrogen by Nano-Sized Bimetallic Pd-Cu/SnO2 Catalyst

Cheng Jian-hua 1.2  Hu Yong-you 1.2  Wu Yi-bao 1.2   

  1. 1. School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, Guangdong, China; 2. Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area of the Ministry of Education, South China University of Technology, Guangzhou 510006, Guangdong, China
  • Received:2010-01-07 Revised:2010-04-11 Online:2010-08-25 Published:2010-08-25
  • Contact: 程建华（1976-），男，博士，讲师，主要从事水处理技术研究． E-mail:jhcheng@scut．edu．cn
  • About author:程建华（1976-），男，博士，讲师，主要从事水处理技术研究．
  • Supported by:

    国家科技重大专项资助项目（2008ZX07211-005）

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Abstract:

Nano-sized SnO2 and bimetallic Pd-Cu/SnO2  catalysts were successfully prepared via the thermal decomposition method and the impreganation method, respectively. Then, the nano-sized SnO2 was characterized by means of XRD, TEM and specific surface area analyzer, etc. , and the catalytic reduction activity and selectivity of the nano-sized Pd-Cu/SnO2  for nitrate nitrogen were analyzed at atmospheric pressure, with formic acid as the reducing agent. The results show that （ 1 ） the prepared nano-sized SnO2 is of a crystalline size of about 8.9 10. 4 nm or 9.3- 10. 7 nm, with a particle size of about 10. 0 nm and a BET specific surface area being up to 144. 9892m2 /g; and that, in the catalytic reduction of nitrate at a Pd-to-Cu ratio of 6：1 and a formic acid dosage of 16. 0mmol/L, nitrate is completely reduced; 76.23% of the total nitrogen is removed; the catalytic activity reaches 0. ll9mmoL/（min· g） ; and the optimal pH value is 4.0

Key words: tin dioxide, Pd-Cu/SnO2, formic acid, nitrate nitrogen, catalytic reduction