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Forum for discussion on chemical and biological water quality contaminants, water testing equipment, testing techniques, guidelines, water safety plans, sanitary surveys, surveillance, etc.

Problems with Arsenic

Postby Myint » 27 May 2010 15:11

Can someone please share their experience with low-cost village level arsenic removal technologies that could be used to treat handpump water. Some sort of centralized solution rather than a household solution would be interesting. Appreciate help.

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27 May 2010 15:11

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Re: Problems with Arsenic

Postby Christian » 16 Jun 2010 06:40

Hi Myint,

See the attached files which list various treatment options. All require quite a lot of community participation and consumbles though so beware.
The first is teh AusAID guidelines for Arsenic which has a section towards the end on treatment mechanisms in development contexts and the other a WHO paper on removal mechanisms and systems.

Hope this helps,

Christian
Manageing arsenic in water supplies (AusAid 2004).pdf
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Re: Problems with Arsenic

Postby JKMakowka » 28 Nov 2010 06:13

Just to add to this:
I was told by a UNICEF worker that is the low lands of Nepal they used to have a lot of iron filters (probably explained above) to filter out arsenic a few years back, but phased those out now.
This was not because they were not working but rather because they quickly became microbiologically contaminated, and thus it was deemed better to just drill a new well and find one that was low on arsenic (which often can be the case only a few meters apart).

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Re: Problems with Arsenic

Postby omills » 17 Dec 2010 02:20

At the household level the Kanchan Filter or Kanchan Arsenic Filter (KAF), a successful adaption of the biosand filter is highly effective against arsenic. It has the added advantage of removing pathogens (biosand filter).

http://www.akvo.org/wiki/index.php/Kanchan_Arsenic_Filter
Try also : http://www.google.com/search?q=kanchan+filter

ENPHO in nepal is a good organisation to contact.

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Re: Problems with Arsenic

Postby JKMakowka » 16 May 2012 21:56

Future reference for someone:

http://www.insituarsenic.org/
http://www.qub.ac.uk/sites/TiPOT/

Quick summary:
In-situ oxidation of single wells by pumping water, aerating it and infiltrating it back into the aquifer over night has been field tested and found quite efficient as a low-cost solution to significantly reduce arsenic content in the well water.

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