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I used to live near a volcano where the groundwater contains naturally occurring arsenic compound. Since $\ce{As2O3}$, $\ce{As2S3}$, and $\ce{As4S4}$ are predominantly occurring in drinking water, what are the processes for removing them?

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  • $\begingroup$ You may find what you need (happy accident!) in the body of this question chemistry.stackexchange.com/questions/472/…. I don't know that it's a duplicate, I'll let the community decide that. $\endgroup$ – jonsca Jun 16 '13 at 1:58
  • $\begingroup$ (but I wholeheartedly agree with Eric's sentiment below, if you are in fact using this as a method to purify drinking water and not just as a lab exercise, consult an expert in this area for your own safety) $\endgroup$ – jonsca Jun 16 '13 at 1:59
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The US Environmental Protection Agency (EPA) has a page dedicated to arsenic in drinking water. It contains a section that suggests ways to remove it from water.

Disclaimer: I have no idea if the arsenic removal methods on the linked page actually work. You should consult someone trained in the science of water purification for definitive information.

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  • $\begingroup$ Could you give me the chemical equations for precipitating those Arsenic compounds for my experiments? $\endgroup$ – user11750 Jun 16 '13 at 0:27
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    $\begingroup$ I'm sorry, I am not qualified to offer specific suggestions on how to remove toxins thus making water potable. $\endgroup$ – Eric Brown Jun 16 '13 at 0:34

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