Water, Air, & Soil Pollution

, Volume 222, Issue 1–4, pp 255–269 | Cite as

Tracing Organic Footprints from Industrial Effluent Discharge in Recalcitrant Riverine Chromophoric Dissolved Organic Matter

  • Mikhail BorisoverEmail author
  • Yael Laor
  • Ibrahim Saadi
  • Marcos Lado
  • Nadezhda Bukhanovsky


Excitation–emission matrix fluorescence spectroscopy, combined with parallel factor analysis and measurements of UV absorption and dissolved organic carbon (DOC) concentrations, was used to trace the footprints of industrial effluents discharged into the lower Kishon River (Israel). The lower Kishon River typifies streams that are affected by seawater tidal intrusion and represents an extreme case of severe long-term pollution caused mainly by a variety of industrial effluents. The industrial effluents may contribute about 90%, in terms of biochemical oxygen demand, of the total organic carbon discharged into the lower Kishon River. Water samples were collected along the river, including the points of effluent discharge from industrial plants, between November 2005 and September 2006. Two types of fluorescent components characterized the fluorescence of the lower Kishon River water: component I corresponded to humic-like matter and component II spectrally resembled material known to be associated with biological productivity, but different from typical tryptophan-like fluorophore. These fluorescent components and other substances that absorbed light at 254 nm contributed to the DOC pool that resisted riverine microbial degradation under laboratory conditions, and that constitutes up to 70% of the overall riverine DOC. The variations in DOC concentration, absorbance at 254 nm, and concentration of humic-like matter (characterized by component I) correlated with the distance from the sea and the water electrical conductivity, and were linked to seawater tidal intrusion. The increased concentration of component II, as well as its enlarged fraction in the overall riverine DOC pool, was found to be associated with the location of major inputs of the industrial effluents. These findings support the use of this fluorescent component as an indicator of industrial pollution in such severely contaminated riverine systems.


CDOM Industrial effluent Biodegradation River pollution EEM PARAFAC 



We are deeply grateful to the Kishon River Authority for their cooperation and to Mr. Alon Ben-Meir for his help in water sampling. The financial support for this research was provided by the Israel Ministry of Environmental Protection (Project No. 161/03). Valuable comments of two anonymous reviewers are greatly appreciated.


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Mikhail Borisover
    • 1
    Email author
  • Yael Laor
    • 2
  • Ibrahim Saadi
    • 2
  • Marcos Lado
    • 3
  • Nadezhda Bukhanovsky
    • 1
  1. 1.Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, the Volcani CenterBet DaganIsrael
  2. 2.Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Newe Ya’ar Research CenterRamat YishayIsrael
  3. 3.Area of Soil Science, Faculty of SciencesUniversity of A CoruñaA CoruñaSpain

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