Surfactant-Based Chemical Washing to Remediate …
The use of various surfactants in chemical washing and the factors influencing remediation efficiency are highlighted. Based on the current research status and knowledge gaps, future perspectives are proposed to facilitate …
The use of a combined process of surfactant-aided soil washing …
Highlights We study the combination of a surfactant-aided soil washing process with a coagulation process. We compare the effectiveness of three different types of surfactants used as washing reagents. We treat the effluents produced in the SASW process by coagulation using iron and aluminium salts. Anionic surfactant was the most efficient washing reagents and …
Surfactant-Enhanced Soil Washing for Removal of …
Upcoming surfactants like gemini and switchable surfactants are summarized. 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 ...
Enhancement of auxiliary agent for washing efficiency of …
In the present work, washing efficiency of surfactant for soil contaminated at 1 d, 30 d, and 365 d with diesel oil were compared. The facilitation mechanism and environmental compatibility were reviewed. The objectives of this work were to investigate the optimized operation conditions of surfactant-aided wash, mechanism of enhancement with ...
Retrieving Oil and Recycling Surfactant in Surfactant-Enhanced Soil Washing
How 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 significant challenge. Here, we reported for the first time a novel CO2-switchable anionic surfactant, 11-dimethylamino-undecyl sulfate sodium salt (DUSNa), to retrieve leaked oil and recycle surfactant …
Remediation of soils contaminated with total …
Two surfactants, sodium dodecyl sulphate (SDS) and polyoxyethylene sorbitan monooleate (Tween 80), were tested in the decontamination of an artificially contaminated soil with engine lubricant oil …
Soil washing for the remediation of dioxin-contaminated soil…
For soil washing, amphoteric surfactants are used to improve solubility, enhance viscosity as well as assist foam stability. Yet, due to the high cost and relatively complicated working mechanism, the application of amphoteric surfactants for soil washing remains limited (Mao et al., 2015).
Soil Washing
Hence, soil washing systems utilize a wash solution, usually consisting of water, surfactant, and/or leaching agent, to extract and concentrate COCs as well as assist in physical size separation of the finer particles from the larger particle bulk material, thereby concentrating and reducing the contaminated material that must be disposed or ...
The mechanism of the surfactant-aided soil washing system …
A surfactant-aided soil washing mechanism is proposed in this study by examining nine common organic contaminants, which were divided into two groups, hydrophobic …
Surfactant enhanced soil washing technique and its …
PDF | On Jan 1, 2012, V.O. Akpoveta and others published Surfactant enhanced soil washing technique and its kinetics on the remediation of crude oil contaminated soil | Find, read and cite all the ...
Mathematical evaluation of activated carbon adsorption for surfactant
The major requirement for the successful recovery of surfactant from soil washed solution is high selectivity of contaminants from surfactant in the adsorption process. Activated carbon is an excellent selective adsorbent because PAHs are highly hydrophobic compared to most nonionic surfactants used in soil washing processes.
Surfactant-assisted removal of swep residues from soil and
Among the surfactants used for soil washing, nonionics are usually preferred on the basis of their very low critical micellar concentration (c.m.c.), which reduces the presence of residual surfactant on the washed solid [5]. On the other hand, anionic surfactants exhibit a lower tendency to adsorb onto the soil particles, but have higher c.m.c ...
Soil Contaminants and Their Removal through Surfactant-Enhanced Soil
Surfactant-enhanced soil remediation can be an effective and sustainable method for addressing soil contamination. However, the optimal conditions for using surfactants depend on the specific site ...
Soil washing using surfactants
Soil washing using surfactants. Technological solutions for the remediation of contaminated sites. The low solubility of the components of the non-aqueous phase liquids (NAPL-Non Aqueos Phase Liquids) in the unsaturated and saturated zone, limits the conventional remediation processes of aquifers by pumping and treatment. ...
Soil Flushing
Soil flushing is similar to soil washing, with the primary difference being that soil flushing is performed in situ while soil washing is performed (ex situ) on excavated soil. At sites having shallow groundwater and/or when it is desirable to only treat the vadose zone, the washing fluids can be introduced at ground surface and allowed to ...
Removal of PAHs with surfactant-enhanced soil washing: …
Six operative parameters are tested for their effects on PAH removal effectiveness in surfactant-enhanced soil washing. Stirring speed, washing time, surfactant concentration, and liquid/solid ratio show significant effect on removal, while temperature and on-and-off mode do not. A new parameter (solubilization percentage) is defined to evaluate the effectiveness of …
Remediation of soils contaminated with total petroleum …
The results obtained in this work show that the soil washing using aqueous surfactants solutions is a viable technology for the treatment of sandy soils contaminated with low volatile hydrocarbons, giving the conditions necessary to proceed with a less invasive process such as phytoremediation for finishing soil treatment.
(PDF) Screening of bio-derived surfactants for soil washing …
Surfactant enhanced soil washing of PAH-contaminated soils have been widely investiga ted and man y reviews pu blished [4 – 11]. Due to environm ental concerns abou t synthetic surfactants, re-
Soil Contaminants and Their Removal through Surfactant …
Surfactant-enhanced soil remediation technology offers numerous advantages over conventional soil remediation techniques. One key advantage is its effectiveness in …
Optimization of aeration enhanced surfactant soil washing …
In this work, the efficiency of conventional soil washing performance was enhanced by 12-25% through the incorporation of air bubbles into the low concentration surfactant soil washing system. Surfactant selection pre-experiment using aerated and conventional soil washing reveals Brij 35 > TX100 > Tween 80 > Saponin in diesel oil removal ...
Efficiency of diesel-contaminated soil washing with different …
Surfactants are composed of hydrophilic heads and hydrophobic tails (Liu et al., 2021b).In diesel oil adsorbed on a soil surface, the hydrophobic groups of a surfactant may come in contact with diesel; when surfactant-enhanced soil washing is performed, these groups may interact with water.
Optimization of aeration enhanced surfactant soil washing …
Surfactant-enhanced soil washing has been used for remediation of organic pollutants for an extended period, but its effectiveness and wide application was limited by the …
Remediation of Contaminated Soils by Surfactant-Aided Soil …
Reciprocal surfactant-soil solubilization coefficients (1 / K d), octanol-water partition coefficients (K ow), fractional organic carbon content of the soil (f oc), and surfactant …
Improved remediation of co-contaminated soils by heavy …
Using biosurfactants as washing agents in soil washing has become a viable option in simultaneously removing heavy metals and PAHs from co-contaminated soil, leading to biosurfactant enhanced soil ...
Soil remediation: humic acids as natural surfactants in the washings …
Different classes of surfactants are employed for soil washing depending on the nature of contaminants to be removed. For example, pesticides are removed by non-ionic surfactants such as Triton X-100, and bio-surfactants like the rhamnolipids (Noordman et al., 2000, Mata-Sandoval et al., 2002).Polycyclic aromatic hydrocarbons (PAH) can be washed …
The mechanism of the surfactant-aided soil washing …
A surfactant-aided soil washing mechanism is proposed in this study by examining nine common organic contaminants, which were divided into two groups, hydrophobic compounds and partial hydrophobic compounds, depending on the respective soil partitioning of contaminants, K oc.The presence of a free non-aqueous phase liquid in the soil washing …
Surfactants and Their Applications for …
For in-situ soil washing and surfactant-enhanced bioremediation, the solubilization potential of the HOC should be optimized. Basic information on the soil properties regarding range and distribution pattern of pH, texture, …
Recent advancement in enhanced soil flushing for …
Brij 35 surfactant was effective for soil washing and subsequent surfactant recovery via selective adsorption, demonstrating a recovery efficiency of 85–89% by activated carbon (Darco mesh 20–40 sizes) and removal efficiency of …
Optimization of aeration enhanced surfactant soil washing …
Surfactant-enhanced soil washing has been used for remediation of organic pollutants for an extended period, but its effectiveness and wide application was limited by the high concentration of surfactants utilized. In this work, the efficiency of conventional soil washing performance was enhanced by 12–25% through the incorporation of air ...
Optimization of aeration enhanced surfactant soil washing …
Surfactant-enhanced soil washing has been used for remediation of organic pollutants for an extended period, but its effectiveness and wide application was limited by the high concentration of surfactants utilized. In this work, the efficiency of conventional soil washing performance was enhanced by 12–25% through the incorporation of air bubbles into the low …