Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (2): 156-160.

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Determination of Chemical Oxygen Demand of Papermaking Wastewater via Dual-Wavelength Ultraviolet Spectroscopy

Wang Yu-feng  Chen Ke-fu  Mo Li-huan  Zhou Zhi-ming   

  1. State Key Laboratory of Pulp and Paper Engineering∥United Lab of Resource Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-04-12 Revised:2011-06-28 Online:2012-02-25 Published:2012-01-04
  • Contact: 莫立焕(1971-) ，男，博士，高级工程师，主要从事制浆造纸清洁生产与污染控制研究． E-mail:lhmo@ scut.edu.cn E-mail:ppcwyf@yahoo.com.cn
  • About author:王玉峰(1982-) ，男，博士生，就职于广东省东莞市质量监督检测中心国家纸制品质量监督检验中心，主要从事制浆造纸清洁生产与污染控制研究．
  • Supported by:

    国家“973”计划项目( 2010CB732205)

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Abstract:

This paper deals with the feasibility of direct COD ( chemical oxygen demand) determination for papermaking wastewater via ultraviolet spectroscopy,with two kinds of papermaking wastewater being used in the experiments. The results show that ( 1) the two kinds of papermaking wastewater both possess the maximum UV absorption wavelength of 272nm although they are of different sources; ( 2) there is a good correlation between the UV absorbance at 272nm and the COD; and ( 3) by using 546nm as a reference wavelength,the interference of suspended solids in the wastewater with the UV absorbance is eliminated and the correlation curve becomes more accurate. Moreover,as compared with the standard testing method of COD,the proposed dual-wavelength method is of high precision and accuracy that well meet the requirements of Standard HJ /T 377—2007 Water Quality On-Line Automatic Monitor of Chemical Oxygen Demand ( CODCr ) ,which means that it is feasible in the rapid determination of COD for papermaking wastewater.

Key words: papermaking wastewater, chemical oxygen demand, dual-wavelength spectroscopy, rapid determination