Dear Camila,

The specific surface area of a porous medium  made up of spherical particles of diameter d can be calculated as As = 6(1-theta)/d (Logan 1999). For example, graphite granules anode (1.5 mm diameter) used in MFCs has had specific area estimated to be 817 m2/m3 (Rabaey et al. 2005).

Therefore, based on the specific area for the sponge (850 m2/m3) the diameter in your case will be close to 1.5 mm).

for more details please use the following link:

https://books.google.ps/books?id=2z_vfgvFAJ0C&pg=PA188&lpg=PA188&dq=calculate+a+projected+surface+area+for+a+POROUS+surface&source=bl&ots=4hVBYmCap2&sig=ET25hZ7nrPcaUqUK9g8h4k2sQZo&hl=en&sa=X&ved=0ahUKEwjw58T50ITKAhUBtxQKHWneB10Q6AEIMzAF#v=onepage&q=calculate%20a%20projected%20surface%20area%20for%20a%20POROUS%20surface&f=false

Hoping this will be helpful,

Rafik

Dear Camila,

The specific surface area of a porous medium  made up of spherical particles of diameter d can be calculated as As = 6(1-theta)/d (Logan 1999). For example, graphite granules anode (1.5 mm diameter) used in MFCs has had specific area estimated to be 817 m2/m3 (Rabaey et al. 2005).

Therefore, based on the specific area for the sponge (850 m2/m3) the diameter in your case will be close to 1.5 mm).

for more details please use the following link:

https://books.google.ps/books?id=2z_vfgvFAJ0C&pg=PA188&lpg=PA188&dq=calculate+a+projected+surface+area+for+a+POROUS+surface&source=bl&ots=4hVBYmCap2&sig=ET25hZ7nrPcaUqUK9g8h4k2sQZo&hl=en&sa=X&ved=0ahUKEwjw58T50ITKAhUBtxQKHWneB10Q6AEIMzAF#v=onepage&q=calculate%20a%20projected%20surface%20area%20for%20a%20POROUS%20surface&f=false

Hoping this will be helpful,

Rafik

thank you very much Rafik!!