1921
Volume 98, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

Abstract.

We assessed the ability of sodium dichloroisocyanurate (NaDCC) to provide adequate chlorine residual when used to treat groundwater with variable iron concentration. We randomly selected 654 tube wells from nine subdistricts in central Bangladesh to measure groundwater iron concentration and corresponding residual-free chlorine after treating 10 L of groundwater with a 33-mg-NaDCC tablet. We assessed geographical variations of iron concentration using the Kruskal–Wallis test and examined the relationships between the iron concentrations and chlorine residual by quantile regression. We also assessed whether user-reported iron taste in water and staining of storage vessels can capture the presence of iron greater than 3 mg/L (the World Health Organization threshold). The median iron concentration among measured wells was 0.91 (interquartile range [IQR]: 0.36–2.01) mg/L and free residual chlorine was 1.3 (IQR: 0.6–1.7) mg/L. The groundwater iron content varied even within small geographical regions. The median free residual chlorine decreased by 0.29 mg/L (95% confidence interval: 0.27, 0.33, < 0.001) for every 1 mg/L increase in iron concentration. Owner-reported iron staining of the storage vessel had a sensitivity of 92%, specificity of 75%, positive predictive value of 41%, and negative predictive value of 98% for detecting > 3 mg/L iron in water. Similar findings were observed for user-reported iron taste in water. Our findings reconfirm that chlorination of groundwater that contains iron may result in low-level or no residual. User reports of no iron taste or no staining of storage containers can be used to identify low-iron tube wells suitable for chlorination. Furthermore, research is needed to develop a color-graded visual scale for iron staining that corresponds to different iron concentrations in water.

[open-access] This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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2018-04-04
2018-10-16
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References

  1. Clasen T, Cairncross S, Haller L, Bartram J, Walker D, , 2007. Cost-effectiveness of water quality interventions for preventing diarrhoeal disease in developing countries. J Water Health 5: 599608.
  2. Clasen T, Edmondson P, , 2006. Sodium dichloroisocyanurate (NaDCC) tablets as an alternative to sodium hypochlorite for the routine treatment of drinking water at the household level. Int J Hyg Environ Health 209: 173181.
  3. Arnold BF, Colford JM, Jr, 2007. Treating water with chlorine at point-of-use to improve water quality and reduce child diarrhea in developing countries: a systematic review and meta-analysis. Am J Trop Med Hyg 76: 354364.
  4. Sobsey MD, Stauber CE, Casanova LM, Brown JM, Elliott MA, , 2008. Point of use household drinking water filtration: a practical, effective solution for providing sustained access to safe drinking water in the developing world. Environ Sci Technol 42: 42614267.
  5. Centers for Disease Control and Prevention, 2014. Free Chlorine Testing. Available at: https://www.cdc.gov/safewater/chlorine-residual-testing.html. Accessed January 24, 2018.
  6. Lippy EC, , 1986. Chlorination to prevent and control waterborne diseases. J Am Water Works Assoc 78: 4952.
  7. Hossain MD, Huda MK, , 1997. Study of iron content in groundwater of Bangladesh. J Civ Eng 25: 171179.
  8. Ferguson AS, Mailloux BJ, Ahmed KM, van Geen A, McKay LD, Culligan PJ, , 2011. Hand-pumps as reservoirs for microbial contamination of well water. J Water Health 9: 708717.
  9. Luby S, Islam MS, Johnston R, , 2006. Chlorine spot treatment of flooded tube wells, an efficacy trial. J Appl Microbiol 100: 11541158.
  10. Dowling CB, Poreda RJ, Basu AR, Peters SL, Aggarwal PK, , 2002. Geochemical study of arsenic release mechanisms in the Bengal Basin groundwater. Water Resour Res 38: 12-112-18.
  11. Hem JD, , 1985. Study and Interpretation of the Chemical Characteristics of Natural Water. Alexandria, VA: Department of the Interior, US Geological Survey.
  12. Stefan MI, , 2017. Advanced Oxidation Processes for Water Treatment: Fundamentals and Applications. London, United Kingdom: IWA Publishing.
  13. Hem JD, , 1960. Restraints on Dissolved Ferrous Iron Imposed by Bicarbonate Redox Potential, and pH. Washington, DC: US Government Printing Office.
  14. National Research Council, Safe Drinking Water Committee, 1977. Drinking Water and Health. Washington, DC: The National Academy of Sciences.
  15. Al-Jasser A, , 2007. Chlorine decay in drinking-water transmission and distribution systems: pipe service age effect. Water Res 41: 387396.
  16. Hallam N, West JR, Forster C, Powell J, Spencer I, , 2002. The decay of chlorine associated with the pipe wall in water distribution systems. Water Res 36: 34793488.
  17. Sarin P, Snoeyink V, Bebee J, Jim K, Beckett M, Kriven W, Clement J, , 2004. Iron release from corroded iron pipes in drinking water distribution systems: effect of dissolved oxygen. Water Res 38: 12591269.
  18. Gordon G, Cooper WJ, Rice RG, Pacey GE, , 1988. Methods of measuring disinfectant residuals. J Am Water Works Assoc 80: 94108.
  19. Clark RM, Yang YJ, Impellitteri CA, Haught RC, Schupp DA, Panguluri S, Krishnan ER, , 2010. Chlorine fate and transport in distribution systems: experimental and modeling studies. J Am Water Works Assoc 102: 144155.
  20. Islam N, Sadiq R, Rodriguez MJ, , 2013. Optimizing booster chlorination in water distribution networks: a water quality index approach. Environ Monit Assess 185: 80358050.
  21. Aieta EM, Berg JD, , 1986. A review of chlorine dioxide in drinking water treatment. J Am Water Works Assoc 78: 6272.
  22. Kinniburgh D, Smedley P, , 2001. Arsenic contamination of groundwater in Bangladesh. Kinniburgh DG, Smedley PL, eds. British Geological Survey Report WC/00/19. Keyworth, United Kingdom: British Geological Survey.
  23. Merrill R, Labrique A, Shamim A, Schulze K, Christian P, West K, , 2010. Elevated and variable groundwater iron in rural northwestern Bangladesh. J Water Health 8: 818825.
  24. WHO, 2003. Iron in Drinking-Water: Background Document for Development of WHO Guidelines for Drinking-Water Quality. Available at: http://www.who.int/water_sanitation_health/dwq/chemicals/iron.pdf. Accessed May 18, 2017.
  25. WHO, 2011. Guidelines for Drinking-Water Quality, 4th edition. Available at: http://whqlibdoc.who.int/publications/2011/9789241548151_eng.pdf. Accessed July 8, 2016.
  26. Arnold BF, Null C, Luby SP, Unicomb L, Stewart CP, Dewey KG, Ahmed T, Ashraf S, Christensen G, Clasen T, , 2013. Cluster-randomised controlled trials of individual and combined water, sanitation, hygiene and nutritional interventions in rural Bangladesh and Kenya: the WASH benefits study design and rationale. BMJ Open 3: e003476.
  27. British Geological Survey, 2001. Groundwater Quality: Bangladesh 2001. Available at: https://www.bgs.ac.uk/downloads/start.cfm?id=1277. Accessed August 5, 2017.
  28. Nelson D, , 2002. Natural Variations in the Composition of Groundwater. Presented at Groundwater Foundation Annual Meeting, November 2012, Eugene, Oregon.
  29. Mladenov N, Zheng Y, Miller MP, Nemergut DR, Legg T, Simone B, Hageman C, Rahman MM, Ahmed KM, McKnight DM, , 2009. Dissolved organic matter sources and consequences for iron and arsenic mobilization in Bangladesh aquifers. Environ Sci Technol 44: 123128.
  30. Flanagan S, Meng X, Zheng Y, , 2013. Increasing acceptance of chlorination for household water treatment: observations from Bangladesh. Waterlines 32: 125134.
  31. Dhar R, Zheng Y, Stute M, Van Geen A, Cheng Z, Shanewaz M, Shamsudduha M, Hoque M, Rahman M, Ahmed K, , 2008. Temporal variability of groundwater chemistry in shallow and deep aquifers of Araihazar, Bangladesh. J Contam Hydrol 99: 97111.
  32. Yang F, Shi B, Gu J, Wang D, Yang M, , 2012. Morphological and physicochemical characteristics of iron corrosion scales formed under different water source histories in a drinking water distribution system. Water Res 46: 54235433.
  33. Ayotte JD, Nielsen MG, Robinson GR, Jr Moore RB, , 1999. Relation of Arsenic, Iron, and Manganese in Ground Water to Aquifer Type, Bedrock Lithogeochemistry, and Land Use in the New England Coastal Basins. Pembroke, NH: US Department of the Interior, US Geological Survey.
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  • Received : 06 Dec 2016
  • Accepted : 20 Dec 2017

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