Chromatographic and electrophoretic separation of inorganic sulfur and sulfur–oxygen species

O’Reilly, John W.; Dicinoski, Greg W.; Shaw, Matthew J.; Haddad, Paul R.

doi:10.1016/s0003-2670(00)01389-1

Cited by 65 publications

(65 citation statements)

References 124 publications

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“…The formed iron sulfide is essentially insoluble in aqueous solution leading to high local corrosion rates. Partially oxidized sulfur species can acidify natural waters (O'Reilly et al 2001). Theses reduced forms of sulfur entering the environment can also influence the bioavailability of heavy metals due to complexation and precipitation (Witter and Jones 1998).…”

Section: Oilfield Souring Control: Chemical Treatmentsmentioning

confidence: 99%

“…Thiosalts are important intermediate sulfur species which are undesirable in the environment as they can acidify natural waters (Witter and Jones 1998;Druschel et al 2003;O'Reilly et al 2001;Wang et al 2013;Miranda-Trevino et al 2013;Millero 1986;Kuyucak and Yaschyshyn 2007). Their reactivity is dependent upon temperature, pH, and the presence of oxygen and other thiosalts, metals, and microorganisms (Miranda-Trevino et al 2013).…”

Section: Thiosaltsmentioning

confidence: 99%

“…1). These intermediate sulfur species have implications in both chemical and microbial processes and could impact the treatment approaches for soured reservoirs (Hissner et al 1999;O'Reilly et al 2001;Tang et al 2009;Warren et al 2008;Reid and Warren 2016). The reduced forms of sulfur appear in various oxidation-reduction (redox) reactions and can react with each other in the aqueous solution influencing the souring/scaling process.…”

Section: Introductionmentioning

confidence: 99%

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Reservoir souring: sulfur chemistry in offshore oil and gas reservoir fluids

Basafa

Hawboldt

2018

J Petrol Explor Prod Technol

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The injection of sulfate-containing seawater into an oil reservoir, for maintaining the reservoir pressure, can promote the growth of sulfate reducing bacteria and archaea near the injection wells, leading to the formation of sulfides such as hydrogen sulfide. However, intermediate sulfur species with different valence states, such as polythionates and polysulfides have been detected in several produced water samples, likely a result of phase partitioning, and chemical and microbial reactions. These sulfur species could affect the microbial communities (e.g., microbially influenced corrosion) and will impact the efficiency of souring mitigation methods. In addition, the presence of these sulfur species can result in operational, environmental, and treatment problems. Therefore, development and implementation of souring control strategies during production cycle of oil and gas reservoirs require identifying the origins, reactivity, and the partitioning behaviour of these compounds. This paper presents an overview of the known mechanisms responsible for reservoir souring and then focuses on the chemical reactions and sulfur species associated with production and consumption of hydrogen sulfide. In this work we highlight complexity of the sulfur chemistry and that the assumption that all the sulfate is reduced to hydrogen sulfide can lead to inappropriate souring management methods. The paper also reviews the detection and analysis methods used for sulfur compounds. The review demonstrates that there is a gap in the current souring models and methods due to the exclusion of key sulfur compounds and challenges in identifying and quantifying these compounds with respect to speed of analysis and sample stability.

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Section: Oilfield Souring Control: Chemical Treatmentsmentioning

confidence: 99%

Section: Thiosaltsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reservoir souring: sulfur chemistry in offshore oil and gas reservoir fluids

Basafa

Hawboldt

2018

J Petrol Explor Prod Technol

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“…A great disadvantage of IC with universal detection techniques such as conductivity and indirect UV is interference by the high concentrations of co-eluting matrix anions such as chloride and sulfate [15]. Furthermore, sulfide forms precipitates with heavy metal ions accumulated on the head of the column from metallic components of the IC system [16]. In the rapid, sensitive and selective CE determination of S 2 O 3 2-, S 2-and SO 3 2-anions, a derivatization procedure should be used to improve poor peak shape and peak-peak resolution in separation/speciation analysis due to be a species of polarizable, lightly hydrated and has large deformable electron clouds of thiosulfate.…”

Section: Introductionmentioning

confidence: 99%

Extraction, preconcentration and spectrophotometric determination of trace levels of thiosulfate in environmental waters

Gürkan

Altunay

Gürkan³

2017

J IRAN CHEM SOC

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are statistically in a good agreement with those obtained by DTNB method. Finally, the method developed was successfully applied to the preconcentration and determination of trace thiosulfate from environmental waters. Abstract In the existing study, a new vortex-assisted cloud point extraction (VA-CPE) method was developed for determination of low levels of thiosulfate in environmental waters at 632 nm by spectrophotometry. The method is selectively based on charge-transfer-sensitive ion-pair complex formation of Ag(S 2 O 3 ) 2 3− , which is produced by the reaction of thiosulfate with excess Ag + ions with toluidine blue (3-amino-7-dimethylamino-2-methylphenazathionium chloride, TB + ) and then its extraction into micellar phase of polyethylene glycol 4-tert-octylphenyl ether (Triton X-45) in presence of Na 2 SO 4 as salting-out agent at pH 7.0. All the factors affecting complex formation and VA-CPE efficiency were optimized in detail. Under the optimized conditions, the linear calibration curves for thiosulfate were in the range of 0.2-120 and 5-180 µg L −1 with sensitivity improvement of 81-folds and 15-folds, respectively, as a result of efficient mass transfer obtained by CPE with and without vortex, while it changed in the range of 260-3600 µg L −1 without preconcentration at 642 nm. The limits of detection and quantification of the method for VA-CPE were found to be 0.05 and 0.22 µg L −1 , respectively. The precision (expressed as the percent relative standard deviation) was in range of 2.5-4.8% (5, 10 and 25 µg L −1 , n: 5). The method accuracy was validated by comparing the results to those of an independent 5,5′-dithiobis(2-aminobenzoic acid) (DTNB) method as well as recovery studies from spiked samples. It has been observed that the results * Ramazan Gürkan Keywords

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“…9,10 Numerous reports on thiosulfate analysis have been published. [11][12][13][14][15] In these studies, thiosulfate was separated from other species by ion chromatography (IC) or capillary electrophoresis (CE), and detected mainly by measuring the conductivity or absorbance. Several sensitive and selective detection methods have utilized a postcolumn reaction of thiosulfate with Ce(IV), followed by fluorescence detection of the resulting Ce(III).…”

Section: Introductionmentioning

confidence: 99%

Effect of Ethanol Addition on the Determination of Thiosulfate Based on Reduction of Ce(IV) and Fluorescence Detection of Ce(III)

et al. 2012

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The effect of ethanol addition on the determination of thiosulfate based on the reduction of Ce(IV) and fluorescence detection of Ce(III) was investigated by flow-injection analysis. It was found that the sensitivity of thiosulfate detection was significantly increased by injecting thiosulfate into a mixed solution of Ce(IV) and ethanol, rather than a solution of Ce(IV) alone. This is probably due to trace amounts of thiosulfate accelerating the rate of reduction of Ce(IV) by ethanol: Ce(IV) is slowly reduced by ethanol in the absence of thiosulfate, and thiosulfate serves as a catalyst to the reduction. The detection limits as S/N = 3 for thiosulfate were very low (10 -9 M level).

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Chromatographic and electrophoretic separation of inorganic sulfur and sulfur–oxygen species

Cited by 65 publications

References 124 publications

Reservoir souring: sulfur chemistry in offshore oil and gas reservoir fluids

Reservoir souring: sulfur chemistry in offshore oil and gas reservoir fluids

Extraction, preconcentration and spectrophotometric determination of trace levels of thiosulfate in environmental waters

Effect of Ethanol Addition on the Determination of Thiosulfate Based on Reduction of Ce(IV) and Fluorescence Detection of Ce(III)

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