Warm backwash on purpose? Possible discussion item.

[Reach4]

I ran across https://wqa.org/wp-content/uploads/2022/09/2016_GAC.pdf. This got me thinking:

Although organics are generally less soluble in colder
water, temperature also impacts mobility (transport) of the contaminant into the pores. Therefore, cold
water may actually inhibit the removal of that contaminant. Furthermore, some organics are volatile
and can be desorbed (released) from the GAC in hot water. For those instances, using a hot water
source to backwash the GAC will actually do a partial regeneration on it.

1. In biology, H2S might be classed as an organic. In chemistry, maybe not. But it got me wondering if H2S can be adsorbed into coconut shell GAC and released during backwash. And if so, maybe some way of heating the backwashing water would be worthwhile.

2. While CL2 is certainly not classed as an organic by anybody, I wonder if there is some manipulation that would let GAC release captured chlorine. Does GAC have a capacity that gets used up, and there is no simple regeneration possible? I expect high temperatures might drive out chlorine, but would something at reasonable temperatures do this?

3. I am wandering from the original topic... My Centaur Carbon, I use for iron+H2S removal, needs replacement after about 8 years. I tried washing with chlorine bleach, and that did not have the desired effect. I think baking the media at high temperatures might do something positive. https://www.calgoncarbon.com/app/uploads/DS-CENT12x4015-EIN-E1-1.pdf says "CENTAUR 12x40 is a liquid phase virgin activated carbon produced from bituminous coal using a patented process. "

https://d3pcsg2wjq9izr.cloudfront.net/files/3463/download/41282/CentaurHSV-GAC.pdf says

CENTAUR ® HSV
Granular Activated Carbon
Making Water and Air Safer and Cleaner Making Water and Air Safer and Cleaner
Description
CENTAUR® HSV* is a vapor phase virgin granular activated carbon
that has been developed specifically for odor removal from
sewage treatment operations. This agglomerated bituminous
coal-based product is unique in that it provides the highest
adsorption capacity for H 2S in the industry without chemical
impregnants and adsorbs volatile organic compounds (VOCs) in
an effective manner.
CENTAUR® HSV, by its catalytic functionality, oxidizes H2S and
converts it to water soluble sulfur compounds. As a result, H2S
capacity can be restored simply by water washing the carbon,
eliminating the safety concerns typically encountered with alkali
impregnated carbons. CENTAUR ® HSV is capable of being
thermally reactivated, which eliminates the disposal concerns
associated with alkali impregnated carbons.

I wonder if I could get HSV for my next media change. It is courser than CENTAUR 12x40. I wonder if that is the only difference.