Technical Bulletin No. 0018: The Chlorine Oxidation of Sulfur Compounds in Dilute Aqueous Solution (AQTB)

A number of kraft mills have used chlorine to oxidize odorous non-condensable gases. In general, these systems have employed existing waste bleach effluents of varying chlorine content, and little effort has been made to determine the actual chlorine requirements for complete oxidation. The attached bulletin summarizes the findings of an NCASI study conducted under the direction of Donald Adams, Head of Air Pollution Research at Washington State University, where the chlorine requirements of the primary sulfur constituents known to be present in kraft mill gases were investigated. Reaction rates were found to be extremely rapid and the final oxidation product appeared to be mainly sulfate. These investigations were extended and the findings are included in Atmospheric Quality Improvement Technical Bulletin No. 21.