We use no sorbent for waste ...

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We use no sorbent for waste water treatment from heavy metals. The Electromagnetic Vortex Layer devices show the high efficiency in heavy metals removing processes. Here is the description https://youtu.be/sFRbTvX6c6o
Here you can see the figures

Acid and heavy metal content before processing:
pH: 1.75
Fe /iron/: 9.7 mg/liter
Cu /copper/: 19.29 mg/liter
Ni /nickel/: 5.8 mg/liter
Cr+6 /hexavalent chromium/: 19.08 mg/liter

after processing on Vortex Machine the figures are as follows:
pH: 6.74
Fe /iron/: 2.77 mg/liter
Cu /copper/: 0.68 mg/liter
Ni /nickel/: less than 0.02 mg/liter
Cr+6 /hexavalent chromium/: less than 0.005 mg/liter