A whole new meaning for the phrase "panning for gold"

#1

There are, apparently, lots of useful heavy metals getting flushed down the drain, on a level equivalent to some commercial mines:

http://www.theguardian.com/science/2015/mar/23/gold-in-faeces-worth-millions-save-environment

A previous study, by Arizona State University, estimated that a city of 1 million inhabitants flushes around $13m (£8.7m) worth of precious metals down toilets and sewer drains each year.

and

In findings presented on Monday at the 249th National Meeting & Exposition of the American Chemical Society in Denver, the scientists showed that the levels of the precious levels were comparable with those found in some commercial mines.

The eight-year study, which involved monthly testing of treated sewage samples, found that 1kg of sludge contains around 0.4mg gold, 28mg of silver, 638mg copper and 49mg vanadium.

Bonkers!

0 Likes

#2

I swear that in my lifetime that we’ll start mining landfill for rare metals

0 Likes

#3

Oh yeah, for sure. I have thought about that a lot. Just think of all the metals in landfill from the era before anybody bothered to recycle anything.

0 Likes

#4

I’d much prefer mining landfill to the current plans of mining the deep sea.

0 Likes