Biosurfactant has a broad application prospect in soil cleaning because compared with surfactant, biosurfactant has higher remediation efficiency and less impact on environment. 1.3.2 surfactants
Some studies involve the simulation of soil washing with surfactants. The main purpose of this study is to determine the contribution of various mechanisms, such as water displacement, surfactant mobilization and dissolution, to the removal of organic pollutants from soil. Application of surfactants in water environment remediation
4. After soil washing, the distribution of relative humidity in hydrodynamic radius becomes narrower and the average relative humidity increases. TEM images showed that the wall of vesicle became thicker after washing, which indicated that solubilization was a way of oil removal by apg1214.
A series of surfactants, tween and TME, were used to enhance the washing of Kuwait soil seriously polluted by crude oil. Journal of soil and groundwater environment, 2015, 20, 5, 26-33. doi 10.7857jsge.2015.20.5.026。
The need to extract oil from wells on the rock surface has led to the development of new and improved oil extraction technologies. One of what
A model describing the distribution of surfactants and hydrophobic organic compounds in surfactant activated carbon system was established. Model simulations were used to evaluate the effects of surfactant, hoc or activated carbon concentrations.
The cost of surfactant Liu is one of the factors that restrict the comprehensive application of soil washing technology. Therefore, lower concentration of TX100 can reduce the cost of surfactant. In addition, the residual soil surfactant may become the long-term pollution source of the nearby ecosystem.
Added to washing water Davis and singer, 1995 dikinya and areda, 2010. Through chemical soil washing, soil particles are cleaned by selectively transferring pollutants from the soil to solutions nhuche and ugoji, 2008. Effectiveness of washing
In soil cleaning methods, biosurfactants have broad application prospects, because compared with surfactants Zhang et al., 2011, biosurfactants have less impact on the environment and remediation efficiency of petroleum contaminated soil. 1.3.2 surfactants
The efficiency of the horizontal rotary drum washing machine can be improved by using a more open drum. Basically, there is no soapy water in the annular space, which is achieved by using a pump to wet clothes during rotation and falling. Through modeling and simulation to quantify these claims, and further optimize the design of horizontal washing machine.
It gives people different feelings in the process of washing and gargling. Detergency mechanism of washing powder surfactant surfactant can work in three different ways: roll up, emulsification and solubilization. 5.1 curling mechanism Miller and raney22 summarized the rolling mechanism of oily soil. Driving force causing oil soil segregation-
Contaminated soil. Soil washing is a remediation method that can be enhanced by the use of different types of surfactants. Surfactants have been widely used in soil cleaning because of their ability to transform pollutants. Each surfactant molecule is hydrophilic
Li kunsheng, numerical simulation of surfactant enhanced remediation of heterogeneous aquifers contaminated by nonaqueous liquid, Journal of material circulation and waste management, 10.1007s10163-010-0288-7, 12, 3193-2032010.
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The whole process of soil washing and soil recovery was simulated. The optimum dosage range of surfactant was 10 times of critical micelle concentration of 6 sim in soil.
Two size fractions of the plate and soil particles are attached to the plate. The investigation of rlnl611 was conducted only for 125150 m soil particles attached to the plate. 2.2.2. Study on simulation test of soil washing by displacement method of contaminated sand
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Soil washing indicates that the technology is usually carried out in the field, including washing with water as required and possibly adding other substances, chelating agents, surfactants, acids or bases, to improve solid-liquid extraction in contact with the ground.
Soil washing is a non in situ process of removing radionuclides from soil by water and surfactant. By selectively removing fine particles, sludges and clays containing most of the pollutants from large soils, soil washing can reduce large amounts of soil or waste... Figure 10 shows a screen shot of the soil washing simulation...
Soil washing is an effective technical pollutant for rapid remediation of heavy metal and organic contaminated soil or sediment...
The effect of surfactant on the removal of synthetic base oil pao6 from sand was studied. Column and intermittent soil washing tests were carried out with surfactant solution. The results of column tests with rokanol NL6 and JBR 425 solutions show that the effect of oil removal is very poor after 25 times of washing
The effects of synthetic surfactants and biosurfactants on the removal of seven indicator polychlorinated biphenyls (PCBs) in transformer oil contaminated soil were studied by means of batch soil washing evaluation method. Wickerhamiella domercqiae var.sophorolipid ）The PCB removal rate of SLS, especially lactose SLS, was significantly higher than that of SDS and Tween-80.
At present, the treatment methods for this kind of soil include soil washing, incineration and biological treatment. Soil cleaning involves the use of solvents to remove harmful chemicals from the soil. The solvent flow must be treated to remove contaminants. Incineration is an effective tool to destroy pollutants.
Surfactants have been widely recognized for the purification of groundwater aquifers and soil cleaning operations. Both anionic and nonionic surfactants have been used to repair land contaminated by oil and hydrocarbons. Ellis, 1990, Peters et al., 1990
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Therefore, SVE is a more effective separation technology than soil washing or washing for the relatively insoluble volatile pollutants in soil. Figure 2 summarizes these concepts regarding site remediation strategies and representative technologies associated with them.
Therefore, more cases of soil washing or aquifer washing using anionic surfactants instead of cationic surfactants are reported. Cationic surfactants are... Since the volume of the simulation unit and the number of heptane molecules are the same in all simulations, all curves shown in Figure 5 start from the same point.