ʻO ke kinoea kūlohelohe, kahi "wahie alahaka" koʻikoʻi, loaʻa pinepine ka hydrogen sulfide (H₂S) a me nā hui sulfur organik (mercaptans, COS), he mea ʻawahia, ʻino, a hana i ka SOx ʻino i ka wā e puhi ʻia ai. No laila, he mea nui ka desulfurization (mea ʻono).