Ukuphefumula indandatho / ikholomu ephefumulayo iyisihlungi semidiya esiyisiyingi esinesakhiwo esinzima kakhulu se-pore, esakhiwe ngokubalwa kokushisa okuphezulu. Lesi sihlungi kulula ukukhiqiza i-eddy yamanje ukuchoboza into enkulu lapho amanzi egeleza ngayo .Ukuphefumula indalo / ikholomu impahla eluhlaza kungumbumba wemvelo, onamaminerali amaningi acebile, njenge-aluminium, i-magnesium, i-iron, i-sodium, i-potassium ne-calcium .
Lesi sihlungi futhi esinama-electronegative, singenza isihlungi sibe ne-adsorption yomzimba enhle kakhulu.Lapho inani le-PH lamanzi i-asidi engaphelele, ukuphefumula kwendandatho / ikholomu kunganciphisa ukukhipha i-calcium ne-sodium, kuvikele ngempumelelo ukunciphisa kwe-PH, ukuze kugcinwe indawo enempilo okwezinhlanzi.