Surfactants

Holmberg, Krister

doi:10.1002/14356007.a25_747.pub2

Cited by 28 publications

(22 citation statements)

References 86 publications

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“…The principal reagent used in this study was linear sodium DBS, which is an anionic surfactant (Holmberg, 2019) having the chemical composition C 12 H 25 C 6 H 4 SO 3 Na and molecular weight of 348.48 g mol À1 in white crystalline powder form, with a purity of approximately 99+% (Fujifilm Wako Pure Chemical Corporation, Osaka, Japan). Sodium chloride with a purity of 98+% was used (Fujifilm Wako Pure Chemical Corporation).…”

Section: Reagentsmentioning

confidence: 99%

Precise estimation of dodecylbenzenesulfonate in aqueous solution containing dissolved organic matter extracted from soil using UV‐spectrometry

Hossain

Ishiguro

2021

European J Soil Science

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Precise estimation of sodium dodecylbenzenesulfonate (DBS) is essential for understanding its adsorption in soils, transport, toxicity, fate, and its application in the remediation of contaminated soil and groundwater. DBS can be easily identified by its conjugated double bond systems of benzene rings under the ultraviolet (UV) spectrum of a spectrophotometer. However, benzene group components of dissolved organic matter (DOM) also absorb light in the UV spectrum, and this effect is responsible for the excess quantities of DBS that are falsely measured by spectrophotometers. This study was conducted to propose a method for accurately measuring the DBS concentration of a solution containing DOM. To elucidate the influence of DOM during the UVspectroscopic measurement of DBS in an aqueous solution, 222.5 nm UV and 400 nm UV-vis spectra were measured. The DOM was extracted from a highly humic non-allophanic volcanic ash (Andosol) soil by using 1 mmol NaCl/L and 100 mmol NaCl/L solutions as the extractants. The absorbances at both 222.5 and 400 nm increased in proportion to the increase in the DOM concentration. The relationship between the absorbances at the two different wavelengths could be expressed as a linear relationship. On the other hand, the absorbance at 400 nm did not increase with the increase in the DBS concentration, whereas the absorbance at 222.5 nm increased with the increase in the DOM concentration. Therefore, we inferred that the influence of DOM on the absorbance value of the DBS-DOM complex solution at 222.5 nm could be eliminated by using the linear relationship between the two different absorbances of the DBS-free DOM solution. This method makes it possible to easily measure the DBS concentration of a solution from soil water, streams or industrial effluents containing DOM, without using reagents. Highlights• Dodecylbenzenesulfonate in a solution is overestimated in the presence of dissolved organic matter.• Dodecylbenzenesulfonate becomes precisely detectable using 222.5 and 400 nm spectrophotometry.

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Section: Reagentsmentioning

confidence: 99%

Precise estimation of dodecylbenzenesulfonate in aqueous solution containing dissolved organic matter extracted from soil using UV‐spectrometry

Hossain

Ishiguro

2021

European J Soil Science

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“…The main reagent used in this study is linear sodium DBS, which is an anionic surfactant (Holmberg, 2019) with a chemical composition of C 12 H 25 C 6 H 4 SO 3 Na and a molecular weight of 348.48 g/mol. The DBS was procured from Fujifilm Wako Pure Chemical Corporation (Osaka, Japan) in white crystalline powder form, with a purity of ~99+%.…”

Section: Methodsmentioning

confidence: 99%

Influence of high pH state of dodecylbenzenesulfonate and dissolved organic matter complex solution on the ultraviolet spectrometry of dodecylbenzenesulfonate

Hossain

Ishiguro

2022

J Surfact & Detergents

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Dodecylbenzenesulfonate (DBS) is an anionic surfactant that is the most commonly used ingredient in modern cleaning agents. Globally, billions of liters of untreated DBS are released daily into natural water bodies, which may lead to fatal consequences in micro and macro living entities, and destroy the natural ecosystem. Therefore, a simple, precise, rapid, and inexpensive method for measuring DBS is crucial for developing countries. The conventional ultraviolet (UV) spectrophotometric method cannot accurately estimate the DBS concentration in a solution containing a considerable quantity of dissolved organic matter (DOM). Recently, a new spectrometric method was developed using the 222.5 nm UV and 400 nm UV-visible (UV-vis) spectra to precisely estimate DBS concentration in the DBS-DOM complex solution. However, this newly developed method is yet to be validated under higher pH conditions. The accuracy of DBS measurements from the DBS-DOM complex solution under lower pH (5.5 and 6.5) and higher pH (12.5) conditions was compared in this study using the previously developed method. With the higher pH, the influence of the electrolyte increased the absorbance under the 222.5 nm UV spectrum. However, such influence decreased with the increase in DBS and DOM concentration. The UV-vis absorbance at 400 nm decreased under higher pH values when the DOM concentration increased, owing to the conformational change in DOM. Despite the contrasting trends of the absorbances in the two spectra, the studied method was proven to be equally applicable and efficient, even under higher pH conditions.

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“…The surfactant most commonly used in liquid soap is sodium laureth sulfate. Surfactants that form micelles in water destroy the lipid envelope of coronaviruses by trapping fragments of the envelope in the micelles and thus destroying the viral envelope . Since the proteins contained in the viral envelope enable the virion to dock with the host cell and subsequently infiltrate the viral genome, the destruction of this envelope is an effective step in the inactivation of viruses.…”

Section: Experiment: the Effect Of Disinfectant And Soapmentioning

confidence: 99%

“COVID-19 between Myth and Science”─Innovative Experiments for Analyzing Fake News Inside and Outside the Chemistry Classroom

Otte

Beeken

2022

J. Chem. Educ.

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While the COVID-19 pandemic continues, the acceptance of numerous measures, such as mandatory wearing of face masks or social distancing, is declining. At the same time, the spread of fake news related to these measures is on the rise. The acceptance of and compliance with the measures depends to a large extent on knowledge about these very measures. For this reason, there is a need for adequate formats inside and outside the chemistry classroom that examine the mitigation measures and related fake news more closely. The practical and problem-oriented approach of the natural sciences provides a good basis for evaluating mitigation measures and fake news. Here, the focus is primarily on the knowledge gained by conducting and evaluating experiments. For this reason, experiments related to measures and fake news on the COVID-19 pandemic were developed that can be carried out with household objects and chemicals. All experiments can be performed without much effort and are therefore intentionally designed to appeal to students and adults with little background in science. This paper presents a total of four experiments on the dispersion of aerosols and droplets, the effectiveness of face masks, and the importance and mode of action of disinfectant and soap.

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Surfactants

Cited by 28 publications

References 86 publications

Precise estimation of dodecylbenzenesulfonate in aqueous solution containing dissolved organic matter extracted from soil using UV‐spectrometry

Precise estimation of dodecylbenzenesulfonate in aqueous solution containing dissolved organic matter extracted from soil using UV‐spectrometry

Influence of high pH state of dodecylbenzenesulfonate and dissolved organic matter complex solution on the ultraviolet spectrometry of dodecylbenzenesulfonate

“COVID-19 between Myth and Science”─Innovative Experiments for Analyzing Fake News Inside and Outside the Chemistry Classroom

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