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==Source==
==Source==


* Brittney Dawney, Cheng Cheng, Richelle Winkler, Joshua M. Pearce. [http://www.sciencedirect.com/science/article/pii/S0169131714002397 Evaluating the geographic viability of the solar water disinfection (SODIS) method by decreasing turbidity with NaCl: A case study of South Sudan]. ''Applied Clay Science'' (in press). [open access soon] DOI: 10.1016/j.clay.2014.06.032
* Brittney Dawney, Cheng Cheng, Richelle Winkler, Joshua M. Pearce. [http://www.sciencedirect.com/science/article/pii/S0169131714002397 Evaluating the geographic viability of the solar water disinfection (SODIS) method by decreasing turbidity with NaCl: A case study of South Sudan]. ''Applied Clay Science'' 99:194–200 (2014). [https://www.academia.edu/8116733/Evaluating_the_geographic_viability_of_the_solar_water_disinfection_SODIS_method_by_decreasing_turbidity_with_NaCl_A_case_study_of_South_Sudan open access soon] DOI: [http://dx.doi.org/10.1016/j.clay.2014.06.032 10.1016/j.clay.2014.06.032]
 


==Highlights==
==Highlights==
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==See also==
==See also==
* [[Decreasing turbidity to optimize solar water disinfection]]
* [[Literature Review: Decreasing turbidity to optimize solar water disinfection]]<br>
* [[Literature Review: Decreasing turbidity to optimize solar water disinfection]]<br>
* [[Coagulation-flocculation jar test protocol]]
* [[Coagulation-flocculation jar test protocol]]

Revision as of 00:09, 29 August 2014

Sudansodis.png

Source

Highlights

  • Solar water disinfection (SODIS) method needs low turbidity.
  • Investigated table salt (NaCl) to reduce the turbidity of suspended colloidal clay
  • Vertisol soil dispersions had up to 92% particle removal efficiency.
  • NaCl in combination with as little as 30% bentonite jumpstarts turbidity reduction.
  • GIS study of South Sudan showed the expansion of SODIS by 1.56 million people.

Abstract

Making water clear for SODIS
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While the solar water disinfection (SODIS) method of treating microbiologically contaminated water at the household level has proven to be effective at reducing incidence of diarrhea, its effectiveness is limited to waters of low turbidity. This study investigates the use of table salt (NaCl) to reduce turbidity in water containing dispersed colloidal clay particles as a means of expanding the user base of SODIS. Jar tests were performed on solutions of a low-activity clay, simulating the general composition of soils of the Vertisol type, which are found in key developing regions. Results show that dispersions exhibited as high as 92% particle removal efficiency. The results of this study suggest that NaCl in combination with as little as 30% bentonite by mass may be used to produce a small-scale jumpstart effect by reducing turbidity to a level suitable for SODIS treatment. Soil type was mapped and overlaid with population estimates in a GIS environment to highlight geographic areas where salt + SODIS may be most viable in the case study of South Sudan. Findings suggest that the NaCl method could expand access to SODIS technology by about 1.56 million people who currently lack access to an improved water source in the case study.


See also

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