6th International Young Scientist Congress (IYSC-2020) will be Postponed to 8th and 9th May 2021 Due to COVID-19. 10th International Science Congress (ISC-2020).  International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Congo River Waters Characterization and their Disinfection by Calcium Hypochlorite and their Treatment by Flocculation using Lime and Aluminum Sulphate

Author Affiliations

  • 1Unité de Recherche Chimie, Faculté des Sciences, Université des Sciences et Techniques de Masuku, Franceville, GABON
  • 2Laboratoire de Contrôle de Qualité, Société Nationale de Distribution d’Eau, Brazzaville, CONGO

Res.J.chem.sci., Volume 3, Issue (7), Pages 80-86, July,18 (2013)


The flocculation and the chlorination are two methods very used for the water treatment. The purpose of our study is the characterization of waters of Congo River, the determination of the dose of chlorine, lime and sulphate of aluminum necessary for their disinfection and their flocculation. It appears from all the results that, the best treatment by flocculation-coagulation is obtained by the application of a combination of 25 mg/L from sulfate of aluminum and 10 mg/L of lime. Whereas the best conditions of disinfection are obtained for 6 mg/L of hypochlorite of calcium and a pH value 6.48.


  1. Thurman E.H. and Malcom R.L., Structural study of humic substances: new approaches and methods, in aquatic and terrestrial humic materials, Ann Arbor Science Publishers, 1-23 (1983)
  2. Clark R.M., Gooddrich J.A. and Wymer L.J., Effect of distribution system on drinking water quality, J. Water SRT-Aqua, 24), 30-38 (1993)
  3. Achour S. and Moussaoui K., La Chloration des eaux de surface Algériennes et son incidence sur la formation des composés organohalogénés, Environmental technology, 14, 885-890 (1993)
  4. Mouchet P., Les modalités de traitement des eaux brutes : Quelle qualité d’eau ? Quels procédés ?, STP Pharma Pratiques, ), 136-148 (1991)
  5. Aremu M.O., Gav B.L., Opaluwa O.D., Atolaiye B.O., Madu P.C. and Sangari D.U., Assessment of physicochemical contaminants in waters and fishes froms elected rivers in Nasarawa State, NIGERIA, Res. J. Chem. Sci, 1(4), 6-17 (2011)
  6. Murhekar G.H., Assessment of Physico-Chemical Status of Ground Water Samples in Akot city, Department of chemistry, Govt. Vidarbha Institute of Science and Humanities, Amravati 444604 (M. S.) INDIA, Res. J. Chem. Sci, 1(4), 117-124 (2011)
  7. Andzi B.T. and Bouaka F., Physicochemical Characterization and Chlorination of Well Water Consumed in Brazzaville-Congo, J. Mater. Environ. Sci., ), 605-612 (2013)
  8. Andzi B.T. and Bouaka F., Physicochemical Characterization and Chlorination of Drilling Water Consumed In Brazzaville-Congo, (), 2328-2336 (2013)
  9. W.H.O, Normes Internationales applicables à l’eau de boisson. Genève, (1972)
  10. Sagar Suman, Singh N.P. and Chandra Sulekh, Effect of Filter Backwash Water when blends with Raw Water on Total Organic Carbon and Dissolve Organic Carbon Removal, Res. J. Chem. Sci., 2(10), 38-42 (2012)
  11. Haro M., Guiguemde I., Diendere F, Bani I, Kone M., Soubeiga M, Diarra J. and Bary A.,Effect of the Kossodo Industrial Wastewater Discharges on the PhysicoChemical Quality of Massili River in BURKINA FASO, Res. J. Chem. Sci, 3(2), 85-91(2013)
  12. Thorvat A.R., Sonaje N.P., Mujumdar M.M. and Swami V.A., A Study on the Physico-Chemical Characteristics of Panchaganga River in Kolhapur City, MS, INDIA, Res. J. Chem. Sci.,2(8), 76-79 (2012)
  13. W.H.O, Directives de qualité pour l’eau de boisson. Genève, (2004)
  14. Duirk S.E., Gombert B., Croue J.P. and Valentine R.L., Modeling monochloramine loss in the presence of natural organic matter, Water Res., 39 (14), 3418–3431 (2005)
  15. Cardot C., Les traitements de l’eau. Procédés physico-chimiques et biologiques, Cours et problèmes résolus. Ed. Ellipse, Paris, 256 (1999)
  16. Guergazi S. and Achour S., Caractéristiques physicochimiques des eaux d’alimentation de la ville de BISKRA. Pratique de la chloration, Larhyss Journal, 4,119-127 (2005)
  17. AFoufou F., Guesbaya N. and Achour S., Effet de la minéralisation des eaux naturelles sur l’élimination des composés organiques aromatiques par coagulation-floculation, Courrier du savoir, 75-81 (2007)
  18. Yang X., Shang C. and Westerhoff P., Factor affecting formation of haloacetonitriles, haloketones, chloropicrin and cyanogens halides during chloramination, Water Research, 41), 1193–1200 (2007)
  19. Lefebvre E. and Legube B., Coagulation par Fe(III) de substances humiques extraites d’eaux de surface : Effet du pH et de la concentration en substances humiques, Water Res., 24), 591-606 (1990)
  20. Rahni M., Coagulation-floculation de quelques composés organiques par le fer ferreux en milieu aqueux, Thèse de Doctorat, Université de Poitiers, France, (1994)
  21. Spellman F.R. and Whiting N.E., Water pollution control technology, ABS Group, 199–214 (1999)
  22. Awwa, Quality control for potable waters, J. An. Works assoc, 6012), 1317-1322 (1986)