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One study is abut storing water in copper pots and the other is about copper in drinking water. Does storing water in pots automatically mean that the copper goes into the water and if yes, how high is the concentration?
TFA looked at the copper concentration in the water after storage and it was below WHO guidelines for safe copper levels. Whether the WHO guidelines are sufficient or not is another question.
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Interesting. Two studies with pretty much conflicting conclusions about safety of copper for potable water. I imagine that there is a level (range) of exposure that is in the sweet spot between 'kills harmful microbes' and 'kills/harms humans who drink the water'.
One study is abut storing water in copper pots and the other is about copper in drinking water. Does storing water in pots automatically mean that the copper goes into the water and if yes, how high is the concentration?
It's not automatic, but depends on pH. Acidic conditions will be favorable to metals leaching into water. The paper cites an initial pH of 7.84, and final pH of 7.94 - so the pH increased slightly as a result of the copper entering the solution.
This pH change correlated with 177 ppb Cu concentration in these pots after 16 hours. If initial pH was lower this concentration would see a logarithmic increase in relation the lower initial pH over the same time interval.
"Since distilled water is slightly acidic (pH 6.7±0.05) which might enhance copper leaching, we have demonstrated the effect of copper pot in regular drinking-water"
The antibacterial properties of copper are well known, and were proven long ago. I think this is just someone looking for something to research and write a paper on.
Can you back up your claim?
The antibacterial properties of copper are well known, and were proven long ago. I think this is just someone looking for something to research and write a paper on.
> and were proven long ago. Can you back up your claim?
There are a whole class of heavy metals that act as germicides.
The antibacterial properties of copper are well known, and were proven long ago. I think this is just someone looking for something to research and write a paper on.
> and were proven long ago. Can you back up your claim?
[0] https://en.wikipedia.org/wiki/Antimicrobial_properties_of_co...
The antibacterial properties of copper are well known, and were proven long ago. I think this is just someone looking for something to research and write a paper on.
> and were proven long ago. Can you back up your claim?
The antibacterial properties of copper are well known, and were proven long ago. I think this is just someone looking for something to research and write a paper on.
I will just leave it here in case someone will want to employ copper pots: https://www.ncbi.nlm.nih.gov/pubmed/10383875
Earlier quoted context omitted.
> and were proven long ago. Can you back up your claim?
Not sure about copper pots specifically, but Wikipedia has a reference suggesting 1893 [0]. [0] https://en.wikipedia.org/wiki/Antimicrobial_properties_of_co...