· Petroleum hydrocarbons are applied in various energy activities. If accidents happen, they may result in environmental contamination, especially in soil. Petroleum hydrocarbons have low evaporation rates and are adsorbed on the soil surface, making it necessary to treat contaminated soil before the pollutants spread to other
Consulta
· Soil flushing is one of the soil remediation technologies which could by applied for treatment of hydrocarbon contaminated soil. Flushing of the contaminated soil samples was carried out by using sodium dodecyl sulfate (SDS) and Triton X-100 surfactant solutions at the concentrations of 0.1%, 0.2%, 0.3%, and 0.4% (W/W).
Consulta
· Mixed surfactant systems and combined use of surfactants with other additives are often adopted to improve the overall performance of soil washing solution for decontamination. Worldwide the field studies and full-scale remediation using surfactant-based technologies are yet limited, however, the already known cases reveal the good
Consulta
· Ex situ soil washing is a technology to concentrate contaminants, allowing soil cleaning and the reuse of extracted petroleum derived products. This work focuses on the optimization of ex situ soil washing process using surfactants, introducing an evaluation of the washing solution recycling and its after use safe disposal, promoting
Consulta
Washing methods, such as soil flushing and soil washing, have shown satisfactory results in the removal of hydrocarbon contaminants from soils with the use of surfactants [6,16–22]. Moreover, soil washing is quite versatile since it allows to overcome
Consulta
Soil washingusing surfactants. Soil washing. using surfactants. Process of mobilization and solubilization of the contamination present in the unsaturated and saturated area for its subsequent in situ treatment (bioremediation, ISCO) or extraction by pump and treat. Allows the mobilization of a wide range of contaminants (TPH, BTEX, PAH, ..)
Consulta
· The performance of activated carbon in soil washing and subsequent selective adsorption for surfactant recovery from the washed solution was investigated. Sandy loam soil contaminated with phenanthrene at 200 mg kg(-1) was washed with four different nonionic surfactants: Tween 40, Tween 80, Brij 30
Consulta
· There have also been indications that pretreatment of a soil with surfactant washing (Igepal CA-720) to solubilize PAHs enhanced biodegradation of these contaminants (Joshi and Lee, 1995). Anionic and nonionic surfactants are less likely to be absorbed to the soil.
Consulta
· The nonionic surfactant TX-100 was chosen for the soil washing processes, since it is highly effective for the dissolution of hydrocarbons and a variety of pesticides. The wastewaters obtained from different washing experiments, with different contaminant and dissolved organic carbon (DOC) concentrations, were submitted to
Consulta
· We assess the challenges and opportunities of in-situ and ex-situ soil washing, the mechanisms of surfactant-enhanced soil washing, and the criteria to follow for surfactant selection. Furthermore, we briefly discuss the operational and environmental factors affecting soil washing efficiency and soil and surfactant properties affecting
Consulta
:Surfactant Soil WashingSurfactants · 2.3. Soil washing experiments Soil washing experiments were carried out by weighting 5 g of the contaminated soil samples that were transferred to Erlenmeyer flasks, where 50 mL of the surfactant solution (liquid/soil ratio of
Consulta
Development and Implementation Status. The following checklist provides a summary of the development and implementation status of soil washing: ☐ At the laboratory/bench scale and shows promise. ☐ In pilot studies. ☒ At full scale. ☐ To remediate an entire site (source and plume) ☒ To remediate a source only.
Consulta
:Surfactant Soil WashingSurfactant-EnhancedSoil ScienceHow to simultaneously realize retrieving oil and recycling surfactant in the remediation of leaked oil-polluted soil by means of surfactant-enhanced soil washing is still a
Consulta
:Surfactant-EnhancedSoil · Surfactants are usually used in soil washing because they can enhance the solubility of PAHs, decrease the surface tension, and promote the efficiency of soil washing []. Among the surfactants,
Consulta
· Among many treatment methods practiced for remediation of petroleum-contaminated soils, surfactant-enhanced soil washing has been widely practiced as a preferred treatment option, as it is a fast
Consulta
:Surfactant Soil WashingSurfactant-EnhancedSoil Washing RemediationThe most efective soil washing method (SWM) was obtained with pH 7.8, liquid to solid ratio 50:1, reaction time 52 min, surfactant concentration 7.9 mg kg−1, and three
Consulta
· The surfactant-based microemulsion technique enhances oil-contaminated soil remediation with high removal performance. With the presence of soil in the surfactant–oil–water (SOW) system, surfactants are the key success for this technology due to their activity. This study aimed to investigate the oil removal efficiency
Consulta
· A biodegradable surfactant, ECOSURF TM SA-15, was added to the recirculation line to lower the interfacial tension and facilitate LNAPL recovery via mobilization. All equipment (submersible pump, LNAPL skimmer, surfactant feed pump, controls, and various other equipment) used was powered by a solar panel array.
Consulta
· Biodegradable natural surfactants obtained from plants can be an attractive alternative to synthetic surfactants in the remediation of contaminated soils. In this research, a plant-based surfactant obtained from the fruit pericarp of Sapindus mukurossi, a tree generally grown in tropical regions of Asia, is tested. A simple and
Consulta
Surfactant enhanced soil washing of PAH-contaminated soils have been widely investigated and many reviews published [4–11]. Due to environmental concerns about synthetic surfactants, re
Consulta
· This work focuses on the optimization of ex-situ soil washing process using surfactants, introducing an evaluation of the washing solution recycling and its after use safe disposal, promoting the
Consulta
· There is increasing concern regarding soils contaminated with polycyclic aromatic hydrocarbons (PAHs). In the present study, the remediation of soil spiked with PAHs was explored by the combination of soil washing with sodium dodecyl sulfate (SDS) and subsequent oxidation through persulfate (PS) activated by Fe2+, nanoscale zero
Consulta
· Overall performance considering both soil washing and surfactant recovery steps is apposite when an TX100:SDS mass ratio of 8:2 at 3 g/L is used and removal efficiencies for PHE-contaminated soil close to the individual higher nonionic surfactants can be achieved. Batch experiments were conducted to investigate the
Consulta
Soil washing provides an effective measure of removing contaminants from soil permanently, of which washing reagent plays a vital role in the process. This paper reviews the current knowledge acquired on the main aspects concerning washing reagents of soil washing for remediation of heavy-metal contaminated soil based on more than 150
Consulta
· Because soil washing requires anionic surfactants, we have investigated phenolate, benzoate and carboxylate salts as switchable anionic surfactants. These surfactants can indeed be switched on and
Consulta
Washing of soils polluted with polycyclic aromatic hydrocarbons (PAHs) using surfactant is a widely used technique. Once the pollutant is transferred to the washing solution, the polluted wastewater has to be treated. In this work, the feasibility of conductive-diamond electrochemical oxidation (CDEO) to treat wastewater polluted with phenanthrene
Consulta
· We assess the challenges and opportunities of in-situ and ex-situ soil washing, the mechanisms of surfactant-enhanced soil washing, and the criteria to follow for surfactant selection. Furthermore, we briefly discuss the operational and environmental factors affecting soil washing efficiency and soil and surfactant pro- perties
Consulta
· The proposed soil washing mechanism and mathematical model can describe the performance curve of the surfactant-aided soil washing process successfully. The use of HOC and PHOC defined by the K oc of the contaminant is feasible to explain the existence and importance of NAPL contaminants in the soil washing system.
Consulta
:Surfactant Soil WashingSoil Washing RemediationSoil Science · The performance of activated carbon in soil washing and subsequent selective adsorption for surfactant recovery from the washed solution was investigated.
Consulta
DOI: 10.1016/j.jhazmat.2009.09.118 Corpus ID: 206076741 Soil remediation using a coupled process: soil washing with surfactant followed by photo-Fenton oxidation. @article{Villa2010SoilRU, title={Soil remediation using a coupled process: soil
Consulta
Trituradora de piedra vendida por proveedores certificados, como trituradoras de mandíbula/cono/impacto/móvil, etc.
OBTENER COTIZACIÓN