Optimization and validation of a new method for analysis of linear alkylbenzene sulfonates in sewage sludge by liquid chromatography after microwave-assisted extraction

Villar, María José; Callejón, Manuel; Jiménez, Juan Carlos; Alonso, Esteban; Guiraúm, Alfonso

doi:10.1016/j.aca.2007.07.065

Cited by 54 publications

(32 citation statements)

References 22 publications

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“…The extraction method requires only 0.5 g of sample and no additional clean-up is required prior to the final determination by LC using a FLD or DAD detector. A new method for the extraction and determination of LAS from sewage sludge based on MAE and HPLC coupled to DAD and FLD has been proposed (Villar et al, 2007). The extraction of C 10 -C 13 homologues of LAS was carried out by using an extraction time of 10 min and 5 mL of methanol and the determination of LAS by HPLC lasted less than 6 min.…”

Section: New Analytical Approaches For Emerging Pollutants Determinationmentioning

confidence: 99%

New Methodologies for Assessing the Presence and Ecological Effects of Pesticides in Doñana National Park (SW Spain)

Pueyo¹,

Gómez-Ariza²,

Bello-López³

et al. 2011

Pesticides in the Modern World - Trends in Pesticides Analysis

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Section: New Analytical Approaches For Emerging Pollutants Determinationmentioning

confidence: 99%

New Methodologies for Assessing the Presence and Ecological Effects of Pesticides in Doñana National Park (SW Spain)

Pueyo¹,

Gómez-Ariza²,

Bello-López³

et al. 2011

Pesticides in the Modern World - Trends in Pesticides Analysis

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“…To group of environmental friendly techniques are included: accelerated solvent extraction (ASE) [52][53][54], microwave-assisted extraction (MAE) [55,56] and supercritical fluid extraction (SFE) [54,57]. The two first techniques with use of solvents (methanol) are assisting by elevated temperature and pressure or microwave radiation.…”

Section: Solid Samplesmentioning

confidence: 99%

Determination of Surfactants in Environmental Samples. Part II. Anionic Compounds

Olkowska¹,

Ruman²,

Kowalska³

et al. 2013

Ecological Chemistry and Engineering S

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Abstract:Surface active agents (SAA) with negative charge of polar group are named as anionic compounds. They are the main constituent of most products containing synthetic surfactants. The linear alkylbenzene sulfonates (LAS), alkyl ethoxysulfates (AES) and alkyl sulfates (AS) are typically applied from this class of compounds. Those surfactants are ingredients of household detergents and cleaners, laundry detergents, cosmetic etc. Moreover they can be applied in the paper, textile and tanning industry as optical brighteners, dispersant, wetting and suspending agents. They can be substrates in the formulation of different products like dyes, pigments, pesticides, exchange resins, plasticizers and pharmaceuticals. Anionic surfactants after use are passed into sewage-treatment plants, where they are partially degraded and adsorbed to sewage sludge (applied in agriculture fields). Finally, the anionic SAA or their degradation products are discharged into surface waters and onto bottom sediments, soils or living organisms. Therefore, it is important (widely application, bioaccumulation, toxicity for living organisms) to investigate the environmental fate of those class of compounds in more details. This research involves determination the concentration of anionic surfactants with use appropriated analytical techniques in environmental samples The official methodology for determination of anionic SAA in liquid samples is based on the ion-pair reaction of these analytes compounds with methylene blue (MB) and an extraction with toxic solvent chloroform. During isolation step of anionic compounds from solid samples are employed Soxhlet and ultrasonic-assisted extraction techniques with use of methanol or mixture of other organic solvents as extraction medium. To overcome disadvantages of those traditional techniques were applied following techniques at sample preparation step from liquid and solid matrices: solid-phase extraction (SPE) and solid-phases microextraction (SPME); accelerated solvent extraction (ASE), microwave-assisted extraction (MAE), supercritical fluid extraction (SFE), respectively. For estimate total concentration of anionic analytes in extracts the spectrophotometric technique is used (as official regulation). For determination concentration of individual analytes were applied gas (derivatization step requires) and liquid chromatography mainly with mass spectrometry technique. The presence of anionic surface active agents was confirmed in various ecosystems (liquid and solid environmental samples).

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“…Quantification of LAS in sewage sludge samples using HPLC-FL with a C 8 column with microwave-assisted extraction is used for sample preparation. A comparison of separation of LAS using HPLC-FL and HPLC-DAD showed no significant difference between the two sets of results and that usage of either a FL or DAD detector are applicable [24]. HPLC-MS is considered the most accurate method for determination of LAS as it permits for both a qualitative and quantitative analysis of LAS [3,5].…”

Section: Quantification Of Las By Ultraviolet-visible Spectrophotometrymentioning

confidence: 99%

Electrocoagulative and Biological Treatment of Laundry Wastewater

Ramcharan¹,

Bissessur²

2017

Biological Wastewater Treatment and Resource Recovery

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The greater demand for potable water, both locally and worldwide, has directed a huge interest amongst researchers to investigate the possibility of recycling and reusing wastewater from laundry run-offs. The advantage of using recycling wastewater from such sources is mainly due to the fact that these bulk volumes of wastewater are considered to be less chemically polluted in comparison to those discarded from industrial effluents and wastewater sources. Almost all laundry detergents contain surfactants, whose main function serves to remove dirt/soil from contaminated items. Thus, an analysis of the surfactant levels before and after a treatment process is important to confirm that the surfactant has in fact carried out its intended purpose. Electrocoagulative treatment of wastewater, a well-researched and well-documented clean-up process that involves the production of aluminium hydroxy species by oxidation of aluminium metal upon the application of a controlled voltage which adsorbs fine particulate matter and pollutants from the wastewater has been investigated as a clean-up application to the treatment of laundry wastewater. The use of a biological treatment process which entails treating the wastewater with aerobic bacterial specie specifically designed to degrade fats, lipids, protein, detergents and hydrocarbons has also been investigated.

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Optimization and validation of a new method for analysis of linear alkylbenzene sulfonates in sewage sludge by liquid chromatography after microwave-assisted extraction

Cited by 54 publications

References 22 publications

New Methodologies for Assessing the Presence and Ecological Effects of Pesticides in Doñana National Park (SW Spain)

New Methodologies for Assessing the Presence and Ecological Effects of Pesticides in Doñana National Park (SW Spain)

Determination of Surfactants in Environmental Samples. Part II. Anionic Compounds

Electrocoagulative and Biological Treatment of Laundry Wastewater

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