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sulphuric acid biogenic

  • A new test procedure for biogenic sulfuric acid corrosion

    A new test method is described for biogenic sulfuric acid corrosion of concrete more specifically in sewer con-ditions.The aim of the new test method is the development of an accelerated and reproducible procedure formonitoring the resistance of different types of concrete with regard to biogenic sulfuric acid corrosion. This exper-imentalprocedure reflects worst case conditions by providing

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  • (PDF) Biogenic sulfuric acid corrosion resistance of new

    Biogenic sulfuric acid corrosion resistance was studied by analyzing the surface and localized morphology mass loss and compressive strength of both concrete specimens. The corrosion products

    Read More
  • Assessment of biogenic sulfuric acid corrosion in sewers.

    Biogenic sulfuric acid corrosion is caused by hydrogen sulfide gas which is released by the effluents in sewers and which is converted into sulfuric acid by sulfur bacteria in humid areas above the water level. After a brief explanation of these processes this paper discusses calculation methods for forecasting the possibility of H2S formation in effluents in 2 predisposing environments

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  • Biogenic corrosion by sulfuric acid (BSA)

    BIOGENIC SULFURIC ACID CORROSION (BSA) MATERIALs TEsTING The number of damages caused by biogenic sulfuric acid corrosion (BsA) is increasing. The development of materials resistant to BsA requires testing methods that allow for a testing of the materials that is both oriented towards practice and accelerated. To achieve this test rigs were

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  • Predicting Life Expectancy of Concrete Septic Tanks

    Biogenic Sulphuric Acid Attack A thesis submitted in fulfilment of the requirements for the degree of Masters of Engineering Md Saeed Hasan B.Sc. Eng. (Civil) School of Civil Environmental and Chemical Engineering RMIT University August 2009

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  • Accelerated Degradation Testing Of Concrete In Acidic

    biogenic sulfuric acid corrosion. To examine the degradation of concrete by aggressive liquids a testing apparatus for accelerated degradation tests (TAP) was developed. It was conceived to obtain acceleration of the deterioration process through alternate wetting and drying because this procedure simulates the real-life

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  • Burn with sulfuric acid causes symptoms diagnosis

    Sulfuric acid is a strong oxidizer that absorbs air vapors and dehydrating organic materials. Chemical damage occurs due to the ingress of acid alkali a mixture of chemical reagents or salts of heavy metals onto the living tissue site. From the chemical point of view the acid is a substance with hydrogen atoms and an acid residue.

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  • Degradation modeling of concrete submitted to biogenic

    To obtain the amount of biogenic acid the production rate of H₂SO₄ by SOB is calculated via a set of simplified models governed by pH. Coupling with the modeling of H₂SO₄ degradation process the biodeterioration depth and the solid composition evolution could be predicted.

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  • An evolutionary approach to modelling concrete degradation

    Biogenic sulphuric acid attack of concrete sewer pipes a prediction ofthe corrosion rate in V.M. Malhotra (Ed.). (2001). Chemical and m icrobiological tests to simulate sulfuric acid corrosion of polymer-m odified concre te (2012).

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  • Saadet Gökdoğan s research works Cukurova University

    Saadet Gökdoğan s 6 research works with 73 citations and 1 667 reads including The effects of edible oil nanoemulsions on the chemical sensory and microbiological changes of vacuum packed

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  • Why H2S Results in Biogenic Sulfide Corrosion and How to

    Dec 06 2018 · Biogenic sulfide corrosion a bacterially mediated process of hydrogen sulfide gas with the conversion to sulfuric acid attacks concrete and steel within wastewater environments. Therefore the goal of designers is to eliminate corrosion and health hazards associated with H2S.

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  • How biogenic terpenes govern the correlation between

    New particle formation has been observed to take place all around the world. However because of the inability to determine the chemical composition of the smallest clusters or particles indirect tools such as the correlation between nucleation rate and measured sulfuric acid concentrations have been used to infer the nucleation mechanism. In this study we describe the observed correlation

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  • Biogenic sulfuric acid corrosion resistance of new

    Jan 15 2018 · The biogenic sulfuric acid corrosion simulation device is schematically shown in Fig. 1 which has been modified based on the one reported in literature .H 2 S is produced in part 1 while part 2 conducts the biogenic sulfuric acid corrosion. H 2 S was produced by Na 2 S (0.086 M) and HCl (0.042 M). Volumetric flow of Na 2 S and HCl was kept at 1.4 ml/min while a certain oxygen input quantity

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  • A new test procedure for biogenic sulfuric acid corrosion

    A new test method is described for biogenic sulfuric acid corrosion of concrete more specifically in sewer con-ditions.The aim of the new test method is the development of an accelerated and reproducible procedure formonitoring the resistance of different types of concrete with regard to biogenic sulfuric acid corrosion. This exper-imentalprocedure reflects worst case conditions by providing

    Read More
  • Multicomponent new particle formation from sulfuric acid

    Dec 01 2018 · The total MT mixing ratio was varied between 100 and 1500 pptv. The background sulfuric acid concentration for those experiments was <2 10 5 cm −3. Then 1 to 5 ppbv of SO 2 were added to study the influence of sulfuric acid on pure biogenic nucleation resulting in sulfuric acid concentrations of 5 10 6 to 6 10 7 cm −3.

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  • Combating sulphuric acid corrosion at wastewater plants

    Toxic gases released during biogenic processes such as hydrogen sulphide These microorganisms produce sulphuric acid which reacts with concrete construction elements. As Günther Koraimann

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  • BIOGENIC SULPHURIC ACID CORROSION A MICROSCOPIC

    Biogenic sulphuric acid corrosion is one of the most severe corrosion mechanisms in sewer pipes. Simulation of the tests in laboratory conditions is a demanding task due to the presence of bacteria. In this paper the influence on the microstructure is investigated of two chemical immersion tests and a biochemical test.

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  • Biogenic Sulfuric Acid Attack and Case Studies

    Biogenic Sulfuric Acid Attack and Case Studies by Hugh (Xiaoqiang) Hou Kimberly A. Steiner John Fraczek and James A. Mahaney B iogenic sulfuric acid attack (BSA) is probably the most common and most severe biodegradation mechanism affecting concrete. BSA causes widespread global infrastructure deterioration and it is

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  • Potential Role of Stabilized Criegee Radicals in Sulfuric

    We present field observations made in June 2011 downwind of Dallas–Fort Worth TX and evaluate the role of stabilized Criegee radicals (sCIs) in gaseous sulfuric acid (H2SO4) production. Zero-dimensional model calculations show that sCI from biogenic volatile organic compounds composed the majority of the sCIs. The main uncertainty associated with an evaluation of H2SO4 production from the

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  • Influence of Starkeya novella on Mechanical and

    The formed biogenic sulphuric acid lowers the concrete pH which is a suitable condition for biodegradation . Additionally the formed acid may react with cement mortar/concrete constituents to form other deleterious expansive products such as gypsum and ettringite 10 11 .

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  • An evolutionary approach to modelling concrete degradation

    Biogenic sulphuric acid attack of concrete sewer pipes a prediction ofthe corrosion rate in V.M. Malhotra (Ed.). (2001). Chemical and m icrobiological tests to simulate sulfuric acid corrosion of polymer-m odified concre te (2012).

    Read More
  • Sulfuric acidWikipedia

    Overview

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  • Saadet Gökdoğan s research works Cukurova University

    Saadet Gökdoğan s 6 research works with 73 citations and 1 667 reads including The effects of edible oil nanoemulsions on the chemical sensory and microbiological changes of vacuum packed

    Read More
  • Saadet Gökdoğan s research works Cukurova University

    Saadet Gökdoğan s 6 research works with 73 citations and 1 667 reads including The effects of edible oil nanoemulsions on the chemical sensory and microbiological changes of vacuum packed

    Read More
  • (PDF) Biogenic sulfuric acid corrosion resistance of new

    Biogenic sulfuric acid corrosion resistance was studied by analyzing the surface and localized morphology mass loss and compressive strength of both concrete specimens. The corrosion products

    Read More
  • Phosphorus recovery from high concentrations of low-grade

    Jan 01 2018 · For the conventional chemical acidulation sulfuric acid at the same acidity as the biogenic acid was used (from Fig. 3 t 1 starting at pH 0.32 t 2 starting at pH 0.25 t 3 starting at pH 0.21) and the experiments were carried out using the same phosphate rock concentrations with a residence time of one day.

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  • Biogenic Sulphuric Acid Attack in Sewage Systems

    As a result of the study the particular ecosystem designated the Biogenic Sulphuric Acid Corrosion of Concrete was reproduced in a simulation apparatus. Samples were inoculated with thiobacilli and incubated for 9 months in a test chamber with a humidity > 95 and a temperature of 30°C. Three sulphur sources hydrogen sulphide

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  • (PDF) Biogenic sulfuric acid corrosion resistance of new

    Biogenic sulfuric acid corrosion resistance was studied by analyzing the surface and localized morphology mass loss and compressive strength of both concrete specimens. The corrosion products

    Read More
  • How biogenic terpenes govern the correlation between

    We include biogenic organic compounds from the start of the nucleation process and assume that activation occurs by condensation of or reaction with sulfuric acid. This is in contrast to the nano‐Köhler theory Kulmala et al. 2004a which assumes the water‐soluble organic compounds to condense (activate) sulfuric acid containing

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  • Biogenic Sulphuric Acid Attack in Sewage Systems

    As a result of the study the particular ecosystem designated the Biogenic Sulphuric Acid Corrosion of Concrete was reproduced in a simulation apparatus. Samples were inoculated with thiobacilli and incubated for 9 months in a test chamber with a humidity > 95 and a temperature of 30°C. Three sulphur sources hydrogen sulphide

    Read More
  • Fraunhofer UMSICHT Report MasterSeal 7000 CR EN L

    Biogenic sulfuric acid corrosion (BSA) is a chemical attack to surfaces of different materials such as concrete iron and polymers. It is caused by sulfuric acid producing bacteria e.g. from the genus Thiobacillus and others. It mainly occurs in waste water systems where sulfur compounds are degraded by microorganisms.

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  • Accelerated testing of materials under the influence of

    The number of damages caused by biogenic sulphuric acid corrosion (BSA) is increasing. BSA is a damage situation that often occurs in sewer systems building drainage wastewater treatment plants and biogas plants. Sulphuric acid which is generated through microbiological conversion of sulphur leads to a combined chemical-biological attack on

    Read More
  • Testing of Coatings — UNITRACCUnderground

    For the purpose of simulating the corrosion due to biogenic sulphuric acid a corresponding sewer atmosphere is created in an acclimatised H 2 S noxious gas cupboard. This can be loaded with 32 different prepared test pieces of known composition each of

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  • Assessment of biogenic sulfuric acid corrosion in sewers.

    Biogenic sulfuric acid corrosion is caused by hydrogen sulfide gas which is released by the effluents in sewers and which is converted into sulfuric acid by sulfur bacteria in humid areas above the water level. After a brief explanation of these processes this paper discusses calculation methods for forecasting the possibility of H2S formation in effluents in 2 predisposing environments

    Read More
  • How biogenic terpenes govern the correlation between

    New particle formation has been observed to take place all around the world. However because of the inability to determine the chemical composition of the smallest clusters or particles indirect tools such as the correlation between nucleation rate and measured sulfuric acid concentrations have been used to infer the nucleation mechanism. In this study we describe the observed correlation

    Read More
  • Accelerated testing of materials under the influence of

    The number of damages caused by biogenic sulphuric acid corrosion (BSA) is increasing. BSA is a damage situation that often occurs in sewer systems building drainage wastewater treatment plants and biogas plants. Sulphuric acid which is generated through microbiological conversion of sulphur leads to a combined chemical-biological attack on

    Read More
  • A new test procedure for biogenic sulfuric acid corrosion

    A new test method is described for biogenic sulfuric acid corrosion of concrete more specifically in sewer con-ditions.The aim of the new test method is the development of an accelerated and reproducible procedure formonitoring the resistance of different types of concrete with regard to biogenic sulfuric acid corrosion. This exper-imentalprocedure reflects worst case conditions by providing

    Read More

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