Is the effectiveness of GFO temperature dependent?

[Lasse]

Maybe a silly question but is there anyone that knows if low temperatures effect the rate of GFO:s uptake of PO4?

The reason to this question is that we are planning a 40 000 L coldwater kelp tank and want to have GFO as one of our tools. It will be placed in a reactor by a closed loop. We are also planning to use both refugium and sulphur based denitrification. For these two we plan to heating up the water to around 20 degree C (slow flow through both) from the normal 7 - 12 degree C. If the uptake rate of PO4 in a GFO reactor is significant temperature depended - we can add that feature to this small close loop to - but if does not matter - its much easier and cheaper to use the original cold water.

Sincerely Lasse


















.s uptake of PO4

 

[Cory]

Here is something about about the factors controlling it, says nothing about temperature but its interesting:

(PDF) Factors Controlling Phosphate Interaction with Iron Oxides

PDF | Factors such as pH, solution ion composition, and the presence of natural organic matter (NOM) play a crucial role in the effectiveness of... | Find, read and cite all the research you need on ResearchGate

www.researchgate.net

Here is a pdf talking about temperature and iron oxides:

https://www.google.ca/url?sa=t&source=web&rct=j&url=https://www.nrcresearchpress.com/doi/pdf/10.4141/S99-079&ved=2ahUKEwju097FtPHuAhULt54KHTVWAMcQFjAEegQIBRAB&usg=AOvVaw3qiOze_NAtHyuCo61K8GYt

 

[Cory]

From that pdf:

"The amounts of phosphate adsorbed by the different Fe oxides increased with increas- ing temperature, since there is higher energy for the bond breaking and bond formation at a higher temperature."

 

[Lasse]

Thanks

Sincerely Lasse