TY - GEN
T1 - Control of microbial corrosion in sewers using a green biocidal agent
AU - Jiang, Guanamina
AU - Sun, Xiaoyan
AU - Bond, Philips
AU - Keller, Jurg
AU - Yuan, Zhiguo
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2015
Y1 - 2015
N2 - Concrete sewer corrosion induced by the sulfide oxidation is a long-standing challenge to sewer management. This study presents a novel strategy for reducing the H2S oxidation on corroding concrete surfaces that accommodate an active corrosion biofilm cultivated under sewer conditions. Free nitrous acid was employed to reduce the biological oxidation of sulfide through treating the corrosion biofilm with a spray of nitrite solution. The H2S uptake rates on treated concrete were reduced by 84% -92% 15 days after the nitrite spray. No obvious recovery of the H2S uptake rate was observed up to 22 months after the spray, indicating the long-term effectiveness of the FNA treatment in controlling the activity of the corrosion-causing biofilms. The nitrite is readily transformed by the indigenous microbes in sewage, thus it is a green chemical. Further field trials are still required to verify the effectiveness of this strategy. Nevertheless, it has been demonstrated that the nitrite spray is potentially a very cheap and effective strategy to reduce concrete corrosion in sewers.
AB - Concrete sewer corrosion induced by the sulfide oxidation is a long-standing challenge to sewer management. This study presents a novel strategy for reducing the H2S oxidation on corroding concrete surfaces that accommodate an active corrosion biofilm cultivated under sewer conditions. Free nitrous acid was employed to reduce the biological oxidation of sulfide through treating the corrosion biofilm with a spray of nitrite solution. The H2S uptake rates on treated concrete were reduced by 84% -92% 15 days after the nitrite spray. No obvious recovery of the H2S uptake rate was observed up to 22 months after the spray, indicating the long-term effectiveness of the FNA treatment in controlling the activity of the corrosion-causing biofilms. The nitrite is readily transformed by the indigenous microbes in sewage, thus it is a green chemical. Further field trials are still required to verify the effectiveness of this strategy. Nevertheless, it has been demonstrated that the nitrite spray is potentially a very cheap and effective strategy to reduce concrete corrosion in sewers.
UR - https://www.scopus.com/pages/publications/85025658573
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85025658573&origin=recordpage
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781510837379
VL - 1
T3 - European Corrosion Congress, EUROCORR 2015
SP - 385
EP - 389
BT - European Corrosion Congress, EUROCORR 2015
PB - Austrian Society for Metallurgy and Materials (ASMET)
T2 - European Corrosion Congress, EUROCORR 2015
Y2 - 6 September 2015 through 10 September 2015
ER -