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Modeling of Hydrogen Sulfide Oxidation in Concrete Corrosion Products from Sewer Pipes
Author(s) -
Jensen Henriette Stokbro,
Nielsen Asbjørn Haaning,
HvitvedJacobsen Thorkild,
Vollertsen Jes
Publication year - 2009
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143008x357110
Subject(s) - hydrogen sulfide , corrosion , sulfide , sulfur , sulfuric acid , inorganic chemistry , chemistry , hydrogen , oxygen , materials science , chemical engineering , metallurgy , organic chemistry , engineering
Abiotic and biotic oxidation of hydrogen sulfide related to concrete corrosion was studied in corrosion products originating from a sewer manhole. The concrete corrosion products were suspended in an acidic solution, mimicking the conditions in the pore water of corroded concrete. The removal of hydrogen sulfide and dissolved oxygen was measured in parallel in the suspension, upon which the suspension was sterilized and the measurement repeated. The results revealed the biotic oxidation to be fast compared with the abiotic oxidation. The stoichiometry of the hydrogen sulfide oxidation was evaluated using the ratio between oxygen and hydrogen sulfide uptake. The ratio for the biotic oxidation pointed in the direction of elemental sulfur being formed as an intermediate in the oxidation of hydrogen sulfide to sulfuric acid. The experimental results were applied to suggest a hypothesis and a mathematical model describing the hydrogen sulfide oxidation pathway in a matrix of corroded concrete.