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研究论文

陈静生,张宇,于涛,何大伟.泥沙对黄河水质参数COD、高锰酸钾指数和BOD₅的影响——三论黄河的COD值与高锰酸钾指数不能真实反映其污染状况[J].环境科学学报,2004,24(3):369-375

Influences of the suspended matter on the water quality parameters including COD, P_otassium Permanganate Index and BOD₅ in the Yellow River, China

摘要：研究了黄河泥沙含量与COD、高锰酸盐指数和BOD₅等水质参数间的关系,揭示了当前黄河COD和高锰酸盐指数监测与评价中存在的问题.结果表明,在上述3个描述耗氧有机物污染程度的参数中,BOD₅能真实地反映黄河的有机污染状况,而COD和高锰酸盐指数,不论是用含泥沙的浑水样品测得的数值,还是用滤除掉泥沙的清水样品测得的数值,均在相当程度上夸大了黄河的水污染程度.这种夸大作用在未污染和轻污染河段尤为显著.作者认为,在使用COD和高锰酸盐指数等参数对黄河水质进行评价时,不宜使用直接测得的数值,而应使用经"泥沙有机质本底量"校正的数值.

Abstract：The paper studied the relationships between the content of suspended matter in the Yellow River and water quality parameters including COD, P_otassium Permanganate Index and BOD₅. The results show that there are shortcomings in monitoring and evaluating water quality in the Yellow River using theses parameters. It indicates that, among the three above-mentioned parameters for reflecting the pollution of the oxygen-demanding organic matters, the BOD₅ can factually reflect the status of organic pollution. However, the COD and P_otassium Permanganate Index obtained either from the turbid water which contains the sediment or from filtered water exaggerate the pollution of the Yellow River. The exaggeration is especially notable in the unpolluted or lightly-polluted reaches of the River. Therefore, the author deems that when using the COD or P_otassium Permanganate Index to evaluate the water quality in the Yellow River, it is not suitable to use the measured raw value, but the value which has been calibrated by the "background content of the organic matters in the sediment".