Loading ...
Sorry, an error occurred while loading the content.

Journal article: Evaluation of a new point-of-use household water treatment

Expand Messages
  • dr_sara_bennett
    http://highwire.stanford.edu/cgi/medline/pmid;15382736 Evaluation of a new water treatment for point-of-use household applications to remove microorganisms and
    Message 1 of 1 , Oct 1, 2004
    • 0 Attachment
      http://highwire.stanford.edu/cgi/medline/pmid;15382736

      Evaluation of a new water treatment for point-of-use household
      applications to remove microorganisms and arsenic from drinking
      water. PF Souter, GD Cruickshank, MZ Tankerville, BH Keswick, BD
      Ellis, DE Langworthy, KA Metz, MR Appleby, N Hamilton, AL Jones, and
      JD Perry. J Water Health, June 1, 2003; 1(2): 73-84.

      Abstract: Contamination of drinking water by microorganisms and
      arsenic represents a major human health hazard in many parts of the
      world. An estimated 3.4 million deaths a year are attributable to
      waterborne diseases. Arsenic poisoning from contaminated water
      sources is causing a major health emergency in some countries such
      as Bangladesh where 35 to 77 million people are at risk. The World
      Health Organization (WHO) has recently recognized point-of-use water
      treatment as an effective means of reducing illness in developing
      country households. A new point-of-use water treatment system that
      is based on flocculation, sedimentation and disinfection was
      evaluated for the removal of bacterial, viral and parasitic
      pathogens as well as arsenic from drinking water to estimate its
      potential for use in developing countries. Tests were conducted with
      United States Environmental Protection Agency (EPA)-model and field-
      sample waters from developing countries. Samples were seeded with
      known numbers of organisms, treated with the combined
      flocculation/disinfection product, and assayed for survivors using
      standard assay techniques appropriate for the organism. Results
      indicated that this treatment system reduced the levels from 10(8)/l
      to undetectable (<1) of 14 types of representative waterborne
      bacterial pathogens including Salmonella typhi and Vibrio cholerae.
      No Escherichia coli were detected post-treatment in 320 field water
      samples collected from five developing countries. In addition, the
      water treatment system reduced polio and rotavirus titres by greater
      than 4-log values. Cyrptosporidium parvum and Giardia lamblia
      inocula were reduced by greater than 3-log values following use of
      this water treatment system. Arsenic, added to laboratory test
      waters, was reduced by 99.8%, and naturally occurring arsenic in
      field samples from highly contaminated Bangladeshi wells was reduced
      by 99.5% to mean levels of 1.2 microg/l. This water treatment system
      has demonstrated the potential to provide improved drinking water to
      households in developing countries by removing microbial and arsenic
      contaminants.
    Your message has been successfully submitted and would be delivered to recipients shortly.