Characteristics and environmental fate of the anionic surfactant sodium lauryl ether sulphate (SLES) used as the main component in foaming agents for mechanized tunnelling

Caracciolo, Anna Barra; Cardoni, Martina; Pescatore, Tanita; Patrolecco, Luisa

doi:10.1016/j.envpol.2017.04.008

Cited by 69 publications

(30 citation statements)

References 55 publications

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“…43 However, the most challenging problems related to the use of chemical tensioactive agents in cosmetics are the potential to cause skin irritation and allergic reactions and the negative impact on the environment through the contamination of soil and groundwater. 7,44 Therefore, biocompatibility and biodegradability have become nearly as important as the functional performance of products, which increases the need for the discovery and application of efficient surfactants that do not offer risks to human health or the environment. 45 The use of biosurfactants is a way to avoid or reduce the harmful effects caused by synthetic surfactants.…”

Section: Biosurfactant Properties With Relevance To the Cosmetic Indumentioning

confidence: 99%

Saponins and microbial biosurfactants: Potential raw materials for the formulation of cosmetics

Bezerra

Rufino

Luna

et al. 2018

Biotechnology Progress

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The cosmetic industry is currently one of the fasting growing sections of the economy in many countries. The recent tendency toward the use of cosmetics of a natural origin has driven the industry to seek alternatives to synthetic components in the formulation of products. Biosurfactants are natural compounds that have considerable potential for application in the formulation of safe, effective cosmetics as a replacement for commonly used chemical tensioactive agents. The present review provides essential information on the physicochemical and biological properties of saponins and microbial biosurfactants employed in cosmetic products, with a focus on the use of these natural compounds in shampoos, addressing the current state of research and patents involving biosurfactants for this purpose. The challenges and prospects of this cosmetic application are also discussed. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 2018.

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Section: Biosurfactant Properties With Relevance To the Cosmetic Indumentioning

confidence: 99%

Saponins and microbial biosurfactants: Potential raw materials for the formulation of cosmetics

Bezerra

Rufino

Luna

et al. 2018

Biotechnology Progress

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“…In fact, it is estimated that a tunnel with a length of 50 Km and a cross section of 100 m 2 leads to 8 million m 3 of spoil material composed of different sizes of broken rocks or soil. The anionic surfactant sodium lauryl ether sulfate (SLES) is the main component in several foaming agents (FAs) used in the excavation of highway and railway tunnels with Earth Pressure Balance-Tunnel Boring Machines (EPB-TBM), (Barra Caracciolo et al, 2017). Foaming agents are used for their ability to modify the mechanic and hydraulic behavior of soil, resulting in a malleable material that can be efficiently excavated and transported to temporary deposit areas (Peila, 2014;Peila et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The amount of each FA employed, in terms of soil treatment ratios (TR), depends on the specific lithological characteristics and can vary from 0.1 to 3 L/m 3 . The percentages of SLES can range from 5 to 50% depending on the specific commercial product (Barra Caracciolo et al, 2017). A recent study reports concentrations of SLES in various conditioned soils from excavated tunnels in a range of 27-350 mg/kg soil (Finizio et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Isolation and Characterization in a Soil Conditioned With Foaming Agents of a Bacterial Consortium Able to Degrade Sodium Lauryl Ether Sulfate

et al. 2020

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The anionic surfactant Sodium Lauryl Ether Sulfate (SLES) is the principal component of several commercial foaming products for soil conditioning in the tunneling industry. Huge amounts of spoil material are produced during the excavation process and the presence of SLES can affect its re-use as a by-product. Anionic surfactants can be a risk for ecosystems if occurring in the environment at toxic concentrations. SLES biodegradability is a key issue if the excavated soil is to be reused. The aim of this study was to identify bacteria able to degrade SLES, so that it could potentially be used in bioaugmentation techniques. Enrichment cultures were performed using bacterial populations from spoil material collected in a tunnel construction site as the inoculum. A bacterial consortium able to grow in a few hours with SLES concentrations from 125 mg/L to 2 g/L was selected and then identified by Next Generation Sequencing analysis. Most of bacteria identified belonged to Gamma-Proteobacteria (99%) and Pseudomonas (ca 90%) was the predominant genus. The bacterial consortium was able to degrade 94% of an initial SLES concentration of 250 mg/L in 9 h. A predictive functional analysis using the PICRUSt2 software showed the presence of esterase enzymes, responsible for SLES degradation. The bacterial consortium selected could be useful for its possible seeding (bioaugmentation) on spoil material from tunneling excavation.

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“…These are also widely employed in oil recovery operations. Identified as one of the most common organic pollutants, surfactants enter water bodies through wastewater discharge (Barra Caracciolo, Cardoni, Pescatore, & Patrolecco, ; Borghi, Fabbri, Fiorini, Mancini, & Ribani, ; Sen, Thi, Afroze, Phan, & Ang, ). A surfactant molecule typically constitutes a bipolar structure having one hydrophobic (water‐hating) and one hydrophilic (water‐loving) part and therefore exhibit surface activity involving various intermolecular interactions.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of surfactant using dolochar: A kinetic and statistical modeling approach

Shami

Dash

Verma

et al. 2019

Water Environment Research

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Disturbingly high rates of consumption of surfactants in household and industries have led to mark them as emerging contaminants in the environment. In the present work, removal of sodium dodecyl sulfate (SDS), an anionic surfactant, using an industrial waste (dolochar) was explored. The adsorbent material was characterized with the help of Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Kinetic evaluation was performed using first, pseudo-first, second, and pseudo-second order models. Adsorption of SDS over dolochar was expressed best by pseudo-second order kinetic model with regression coefficient (R 2 ) of .99. Three input parameters including adsorbent dose (20-10 g/L), initial concentration (30-100 mg/L) of the surfactant, and contact time (2-60 min) were chosen for optimization using response surface methodology based on Box-Behnken design (BBD) approach. A total of 15 experiments were run to examine the effect of these variables on removal of SDS by dolochar in a multivariate system. A regression analysis indicated the experimental data fitted well to a quadratic polynomial model with coefficient of regression (R 2 ) as .99. ANOVA and lack-of-fit test depicted the precision and efficiency of the model. The optimized conditions for SDS removal were found to be adsorbent dose 16.62 g/L, contact time 40 min, and initial concentration 47 mg/L with removal efficiency as 98.91%. © 2019 Water Environment Federation • Practitioner points• Daily ablutions and use of personal care products introduce a number of surfactants and recalcitrant compounds into the environment. • Adsorption is a handy and easy to operate treatment technique to remove graywater pollutants. • Kinetic and statistical modeling may be recommended as one of the most prominent tools to understand the removal mechanism. • Decentralized treatment of graywater using industrial wastes is recommended as sustainable solution in the developing nations.• Key words adsorption; Box-behnken design; dolochar; response surface methodology; surfactant

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Characteristics and environmental fate of the anionic surfactant sodium lauryl ether sulphate (SLES) used as the main component in foaming agents for mechanized tunnelling

Cited by 69 publications

References 55 publications

Saponins and microbial biosurfactants: Potential raw materials for the formulation of cosmetics

Saponins and microbial biosurfactants: Potential raw materials for the formulation of cosmetics

Isolation and Characterization in a Soil Conditioned With Foaming Agents of a Bacterial Consortium Able to Degrade Sodium Lauryl Ether Sulfate

Adsorptive removal of surfactant using dolochar: A kinetic and statistical modeling approach

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