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Influence of High Levels of Total Suspended Solids on Measurement of Cod and Bod in the Yellow River, China

Abstract

Using the Yellow River, China, the study explores the problem of the use of COD and BOD5 as water quality management parameters in the presence of very high levels of suspended sediment (TSS) that characterize this river. Although the amount of natural organic matter per unit of suspended sediment of the Yellow River is not high, the very high concentration of mineral sediment in the Yellow River results in a large concentration of organic matter, which artificially inflates the laboratory values of COD and, as a consequent, leads to greatly exaggerated reports of pollution of the Yellow River. BOD5 can more accurately reflect the pollution of the Yellow River than COD; however, measured values of BOD under-report the actual values due to settling of the sediment in the incubation chamber resulting in values that are 21.6--38.3% less than the actual values. Therefore corrections are required for laboratory COD and BOD values so that the values are not artifacts of the sediment regime. Our work provides new insight into this phenomenon and demonstrates how correction factors may be determined and used with pollution data. Our work also suggests that the actual pollution levels of the Yellow River are probably not as high as reported by monitoring agencies.

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References

  • Chen, J. S., He, D. W., etal.: 2003, ‘Can the COD values truly reflect the water pollution of the Yellow River?’, Environ. Chem. 22(6), 611–614, (in Chinese).

    CAS  Google Scholar 

  • Chen, J. S., Zhang, Y., Yu, T. and He, D. W.: 2004, ‘Dissolubility and degradability of organic matters in sediment of the Yellow River’, Acta Scientiae Circumstantiae 24(1), 1–5 (in Chinese).

    Google Scholar 

  • Chen, J. S., Zhang, Y. and Yu, T.: 2004, ‘Influence of the suspended sediments on the water quality parameters CODCr, CODMn and BOD5 in the Yellow River, China’, Acta Scientiae Circumstantiae 24(3), 369–375 (in Chinese).

    Google Scholar 

  • Chapman, D.: 1992, Water Quality Assessments, Chapman & Hall, London, New York, Tokyo, Melbourne, Madras, 585 pp.

    Google Scholar 

  • Chinese Soil Association, the Special Committee on Chemical Analysis of Agricultural Soil: 1974, Conventional Analytical Methods for Soil, Beijing, The Scientific Press (in Chinese).

    Google Scholar 

  • Guo, H. C.: 1990, ‘Effect of the sediment in the Middle Yellow River on the water quality’, in: Collection of Research Papers on the Protection of the Yellow River Source, Beijing, 1990, pp. 70–76 (in Chinese).

  • Jia, Z. B., Zhao, Z. J. and Chang, Y. F.: 2004, ‘The COD change tendency of water pollution in Liao River, China’, Environ. Chem. 23(4), 435–440 (in Chinese).

    CAS  Google Scholar 

  • Ongley, E. D.: 2000. ‘The Yellow River: Managing the unmanageable’, Water Int. 25(2), 227–231.

    Article  Google Scholar 

  • SEPA, Editorial Committee of Monitoring and Analytical Methods for Surface and Waste Water: 1989, Analytical Methods for Surface and Waste Water, Chinese Environmental Sciences Press, Beijing (in Chinese).

    Google Scholar 

  • Velz, C. J.: 1984, Applied Stream Sanitation, 2nd ed., John Wiley and Sons, New York, 800 pp.

    Google Scholar 

  • YRCC, Yellow River Conservancy Commission: 1960–2002, Hydrologic Yearbooks. (Restricted publication) (in Chinese).

  • Zhao, P. L., Li, Q. F., Shen, X. C., etal.: 2001, ‘Effects of the sediment on the water quality of the Yellow River and the pollution control of major reaches’, Press of the Yellow River Conservancy, Zhengzhou, 2001 (in Chinese).

    Google Scholar 

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Correspondence to Chen Jingsheng.

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Jingsheng, C., Tao, Y. & Ongley, E. Influence of High Levels of Total Suspended Solids on Measurement of Cod and Bod in the Yellow River, China. Environ Monit Assess 116, 321–334 (2006). https://doi.org/10.1007/s10661-006-7374-2

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  • DOI: https://doi.org/10.1007/s10661-006-7374-2

Keywords

  • BOD
  • COD
  • oxygen-consumption
  • suspended sediment
  • water pollution
  • water quality assessment
  • Yellow River