Poly-Filter and GFO

Ferdy · 05/18/2018, 12:26 PM

I have a concern that may be able to be addressed. Does Poly-Filter absorb/adsorb iron? The reason I ask is being able to determine if Poly-Filter defeats the purpose of using GFO for phosphate removal. Hopefully someone can answer this for me...I read the ASTM lab testing, and from what I gathered from that is, that, indeed, Poly-Filter does absorb/adsorb iron, which is what granular ferric oxide is. Also, will it absorb/adsorb micro nutrients such as phytoplankton and zooplankton? Thanks.

Dan_P · 05/18/2018, 04:07 PM

GFO does its job inside the GFO reactor where phosphate is adsorbed to the GFO particle. Adsorption of iron from the water is not an issue.

bertoni · 05/18/2018, 10:34 PM

I agree. I answered this in the other thread in which you posted.

05/18/2018, 12:26 PM	#1
Ferdy Registered Member Join Date: Aug 2016 Posts: 6	Poly-Filter and GFO I have a concern that may be able to be addressed. Does Poly-Filter absorb/adsorb iron? The reason I ask is being able to determine if Poly-Filter defeats the purpose of using GFO for phosphate removal. Hopefully someone can answer this for me...I read the ASTM lab testing, and from what I gathered from that is, that, indeed, Poly-Filter does absorb/adsorb iron, which is what granular ferric oxide is. Also, will it absorb/adsorb micro nutrients such as phytoplankton and zooplankton? Thanks.

05/18/2018, 10:34 PM	#3
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I agree. I answered this in the other thread in which you posted. __________________ Jonathan Bertoni

05/18/2018, 04:07 PM	#2
Dan_P Registered Member Join Date: Aug 2014 Posts: 1,432	GFO does its job inside the GFO reactor where phosphate is adsorbed to the GFO particle. Adsorption of iron from the water is not an issue.