A method for removing H.sub.2S from H.sub.2S-containing gaseous streams in which an H.sub.2S-containing gaseous stream is introduced into a flow channel and at least one liquid chemical H.sub.2S scavenging agent is also introduced into the flow channel. Directly within the flow channel, liquid chemical H.sub.2S scavenging agent is transformed into a plurality of H.sub.2S scavenging agent droplets, which plurality of H.sub.2S scavenging agent droplets are contacted with the H.sub.2S-containing gaseous stream, whereby at least a portion of the H.sub.2S is absorbed by the plurality of H.sub.2S scavenging agent droplets. In accordance with one embodiment, transformation of the liquid chemical H.sub.2S scavenging agent is carried out in an inclined flow channel and in accordance with another embodiment, the transformation is carried out using ultrasonic atomization.