- Joined
- Apr 30, 2018
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I'm looking for a general estimate of how quickly the rock will leach or bind PO4. Is it days or minutes? I'm sure it depends on a lot of variables, surface area, delta between water and rock, etc..
Reason I ask is that I am trying to lower PO4. GFO has had some progress but it is slow and expensive. Yesterday I dosed enough LaCl3 (Phosphate Rx) to drop my PO4 by 0.5ppm (per the dosing instructions). Today I tested and my PO4 had only dropped about 0.05 (close to Hanna URL repeatability limits). Could the rock have leached that fast? I made a bunch of precipitate into a 10 micron filter sock.
I have seen people claim to drop PO4 from 1.5ppm to zero in a day. Maybe PO4 binds slower than it leaches and their rock does not have a repository to leach. I'm just trying to make sense of my results and would appreciate any inputs.
Reason I ask is that I am trying to lower PO4. GFO has had some progress but it is slow and expensive. Yesterday I dosed enough LaCl3 (Phosphate Rx) to drop my PO4 by 0.5ppm (per the dosing instructions). Today I tested and my PO4 had only dropped about 0.05 (close to Hanna URL repeatability limits). Could the rock have leached that fast? I made a bunch of precipitate into a 10 micron filter sock.
I have seen people claim to drop PO4 from 1.5ppm to zero in a day. Maybe PO4 binds slower than it leaches and their rock does not have a repository to leach. I'm just trying to make sense of my results and would appreciate any inputs.