scholarly journals Distribution and geochemical behaviour of anionic surfactants determined as ethyl violet active substances in Lake Biwa, Japan

2014 ◽  
Vol 29 (2) ◽  
pp. 221-227 ◽  
Author(s):  
Hiroo Yoshida ◽  
Shunsuke Kudari ◽  
Toshitaka Hori ◽  
Masahito Sugiyama
Keyword(s):  
Lake Biwa ◽  
Anionic Surfactants ◽  
Ethyl Violet ◽  
Geochemical Behaviour ◽  
Active Substances

Modified method for the analysis of anionic surfactants as Methylene Blue active substances

The Analyst ◽  
1995 ◽  
Vol 120 (7) ◽  
pp. 2001 ◽  
Author(s):  
Srinivasarao Chitikela ◽  
Steven K. Dentel ◽  
Herbert E. Allen
Keyword(s):  
Methylene Blue ◽  
Anionic Surfactants ◽  
Modified Method ◽  
Active Substances

scholarly journals Surfactants in Klodnica River (Katowice, Poland). Part I. Linear Alkylbenzene Sulphonates (LAS)

2017 ◽  
Vol 24 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Marek Ruman ◽  
Ewa Olkowska ◽  
Magdalena Drąg-Śmigalska ◽  
Grzegorz Jankowski ◽  
Żaneta Polkowska
Keyword(s):  
Environmental Samples ◽  
Alkyl Chain ◽  
Anionic Surfactants ◽  
Chemical Properties ◽  
Chemical Transformations ◽  
Linear Alkylbenzene ◽  
Physico Chemical ◽  
Surface Active ◽  
Active Substances ◽  
Concentration Levels

Abstract Surfactants are a group of compounds with specific physico-chemical properties and therefore they are used in many spheres of human activity. Surface-active substances undergo various physico-chemical transformations, what enables their migration between different elements of the environment and may lead to its pollution. Selected anionic surfactants were determined in samples of water from the Klodnica river (25 samples) and bottom sediments (25 samples). In most samples the presence of anionic analytes was confirmed. The determined concentration levels were in the range of up to 0.2105±0.0023 mg/dm3 or 0.207±0.010 μg/kg (surface water and bottom sediment samples, respectively). Comparing the concentrations of certain analytes found in liquid and solid environmental samples, it can be noticed that the surfactants containing a shorter alkyl chain in a molecule were present in higher concentrations in liquid samples (hydrophobicity increasing with the increasing length of the chain) and the other way round.

Solvent extraction-spectrophotometric determination of anionic surfactants with ethyl violet

1982 ◽  
Vol 54 (3) ◽  
pp. 392-397 ◽  
Author(s):  
Shoji. Motomizu ◽  
Sigeru. Fujiwara ◽  
Akihiro. Fujiwara ◽  
Kyoji. Toei
Keyword(s):  
Solvent Extraction ◽  
Spectrophotometric Determination ◽  
Anionic Surfactants ◽  
Ethyl Violet

Biodegradation of anionic surfactants in the bioremediation of oil-polluted soil

2019 ◽  
pp. 405-412
Author(s):  
Aare Selberg ◽  
Jana Budashova ◽  
Kalev Uiga ◽  
Toomas Tenno
Keyword(s):  
Microbial Activity ◽  
Soil Ph ◽  
Sandy Soil ◽  
Anionic Surfactants ◽  
Lower Layer ◽  
Chemical Properties ◽  
Polluted Soil ◽  
Hydrophobic Organic Compounds ◽  
Soil Fractions ◽  
Active Substances

Surfactants are applied as emulsifiers or solubilizers by treatment of polluted soil. Theproblem of secondary pollution has arisen as result of the surfactant-enhanced remediation ofa polluted soil contaminated with hydrophobic organic compounds. Several studies haveshown that the surfactants are biodegradable in aerobic conditions and the biodegradabilitydepended on the chemical properties and concentration of surfactant. A study of the leachingof surfactants from the soil is important, as it is difficult to identify the reason for thereduction of concentration of pollutants in the soil: is it degradation or leaching? Theexperiments were carried out with a fine sandy soil in column tests and CaCO3 was added toincrease soil pH. The soil was treated twice with the bioremediation agent SR-100. The soilpH, the concentrations of anionic surfactant and petroleum hydrocarbons at the differentdepths of soil were determined. The microbial activity of soil fractions was evaluated byrespirometer. The concentration of surfactants was determined colorimetrically as MethyleneBlue active substances (MBAS). The concentration of anionic surfactants decreased in theupper layer of the columns, but it increased in the lower layers. It indicated the leaching ofthe anionic surfactants from soil during experiments of 60 days. The amounts of residualsurfactants were lower in the samples of polluted soil in comparison with unpolluted soil. Thesamples of lower soil fractions had higher microbial activity in comparison with upperfractions. Soil pH was measured as pHH20, pHKcl and pHcac12 instead of the pH of soilsolution, because soil was too dry. The pH of fine sandy soil was 5.8 and during theexperiment the value of pH increased in the lower layer of soil till pHH20 = 7.5.

scholarly journals Reverse flow injection analysis of trace amounts of anionic surfactants in seawater without liquid–liquid extraction

2011 ◽  
Vol 6 (No. 4) ◽  
pp. 198-204 ◽  
Author(s):  
L. Yu ◽  
M. Wu ◽  
W. Dong ◽  
J. Jin ◽  
X. Zhang
Keyword(s):  
Flow Injection ◽  
Anionic Surfactants ◽  
Reverse Flow ◽  
Ethyl Violet ◽  
Relative Standard ◽  
Chemical Factors ◽  
Ion Associate ◽  
Reverse Flow Injection Analysis ◽  
Reverse Flow Injection

  In order to control the pollution by anionic surfactants in seawater, a simple, accurate and sensitive reverse flow injection (rFIA) spectrophotometric method for the determination of anionic surfactants in seawater is suggested in this paper. Sodium dodecylbenzenesulfonate (LAS) was selected as the reference anionic surfactant. The method is based on the ion associate formed between LAS and Ethyl Violet. The absorbance of the complex is measured by optical detector at 585 nm. Chemical factors and rFIA variables affecting the system are also discussed. Under the optimal conditions, the linear range of this method was 25.0–400.0 μg/l; the detection limit was 2.4 μg/l; the relative standard deviation was 0.38%. This method is suitable for automatic and continuous analysis, and was successfully applied to determine the content of anionic surfactants in seawater.

Development of a Fiber Optic Evanescent Wave Sensor for Anionic Surfactants Using Ethyl Violet

2015 ◽  
Vol 48 (14) ◽  
pp. 2217-2222 ◽  
Author(s):  
Takuya Okazaki ◽  
Kenichiro Imai ◽  
Ayesha Sultana ◽  
Noriko Hata ◽  
Shigeru Taguchi ◽  
...  
Keyword(s):  
Evanescent Wave ◽  
Fiber Optic ◽  
Anionic Surfactants ◽  
Ethyl Violet

scholarly journals The study of the completeness of the removal of the detergents from children's clothes by the amount of anionic surfactants in wastewater

2021 ◽  
pp. 66-71
Author(s):  
O.M. Holichenkov ◽  
◽  
Yu.S. Domaratska ◽  
V.I. Liashenko ◽  
Z.Yu. Maistrenko ◽  
...  
Keyword(s):  
Anionic Surfactants ◽  
Photometric Method ◽  
Experimental Sample ◽  
Chemical Research ◽  
Safety Level ◽  
Significant Difference ◽  
Residual Amount ◽  
Hygienic Standard ◽  
Active Substances

Objective: We determined a safety level of the agents by the residual amount of the anionic surfactants in wastewater from the objects after their washing with the agents for the treatment of children's products. Materials and methods: 16 detergents for children's clothes washing were purchased at the supermarkets of Kyiv. In our study we applied sanitary-and-chemical research methods: express method for the assessment of the anionic surfactants on the clothes fabrics; an extraction-photometric method for the determination of the the residual amount of the main active substances of the anionic surfactants in the experimental sample. Results: The analysis of the results shows that there is a significant difference in the surfactant amount in the wastewater after washing with powder and liquid detergents based on the synthetic anionic surfactants and natural soap. Therefore, the anionic surfactants are rinsing best of all from the clothes washed with the detergents based on natural soaps (Soaps “Droog”, “Clean & White”, “Kroha”). After washing of the children's clothes with powder and liquid detergents for automatic washing based on synthetic anionic surfactants, the residual amount of the anionic surfactants on the fabrics exceeds the accepted hygienic standard. Conclusions: It has been discovered that even after repeated rinsing, the fabrics, treated with washing powder and liquid detergents, contain the residual amount of the anionic surfactants that exceeds normative parameters (8 of 13 investigated detergents based on the anionic surfactants) by 2-3 times. Taking into account a specificity of children’s functional skin state, especially the incompletely formed multistage protection system, it is recommended to use the detergents based on natural soap and products containing less than 5% of the surfactants for washing of the clothes of the children aged 0 to 6 years.

Sign in / Sign up

Export Citation Format

Share Document