I think that if I worked in a mine I would start carrying a water purification system (portable.) Though I doubt the chinese workers could afford one. Could one be cobbled together, & could such a system (or even a professional grade purifier) remove the toxins from urine?
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.