Desorption of Anthracene from Soil in Presence of Surfactant and Nanomaterial

2013 ◽  
Vol 800 ◽  
pp. 159-161
Author(s):  
Ai Fang Ding ◽  
Chang Yun Chen ◽  
Qin Pu Liu
Keyword(s):  
Contaminated Soil ◽  
Desorption Process ◽  
Low Concentration

Surfactant LAS and nanomaterial taxoite were used to study their effects on anthracene desorption from artificially contaminated soil. The results show that the desoption of anthracene from soil is affected by the type and concentration of materials. Two type of materials with low concentration dont improve anthracene desorption from soil. While, they could enhance the desorption process with the concentrations increasing, especially surfactant LAS. The desorption and solubility ratios of anthracene from soil are 18.55% and 17.11% with the concentrations of surfactant LAS being0.2g/g. However, their ratios are only 3.91% and 2.21% with nanomaterial taxoite.

scholarly journals The impact of ultrasonic power and time for the removal of Total Petroleum Hydrocarbon from Low permeability contaminated soils

2019 ◽  
Author(s):  
agus jatnika effendi ◽  
Marita Wulandari
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Low Permeability ◽  
Ultrasonic Power ◽  
Optimum Conditions ◽  
Desorption Process ◽  
Central Java ◽  
Time Test ◽  
Alternative Techniques ◽  
The Impact

Alternative techniques for treated contaminated soil are physical chemicals and one of them with ultrasonic irradiation. Ultrasonic is widely studied in soil or sediment with several types of contaminants, both heavy metals and organic matter. According to previous research, ultrasonic power not only increases the desorption process or leaching contaminants from the soil but also plays an important role in the formation of radicals (•OH) which are oxidizers involved in the oxidation process. The main reactor has a dimension of 21 cm × 21 cm × 18 cm. The system used is a bath system, where the transducer is attached under the bath (reactor) so that it indirectly produces sonication. Contaminated soil has low permeability and obtained from conventional former petroleum mining land in Grobogan Regency, Central Java with initial concentrations of TPH and oil & grease of 334100 mg / kg and 87700 mg / kg. Based on optimum time test, it can be seen that the decrease in TPH was significant at the initial 15 minutes of sonication while the rest was relatively stable. At optimum conditions, TPH decreases efficiency at a frequency of 48 kHz at a soil / liquid ratio of 1: 9 (gr / ml) and a power of 160 watts is 61.03%

A Study on the Thermal Desorption Process of Oil-Contaminated Soil by Microwave

2013 ◽  
Vol 773-774 ◽  
pp. 865-879
Author(s):  
Sang An Ha ◽  
Mi Young You ◽  
Jei Pil Wang
Keyword(s):  
Thermal Desorption ◽  
Contaminated Soil ◽  
Treatment Process ◽  
Total Petroleum Hydrocarbon ◽  
Processing Temperature ◽  
High Concentration ◽  
Desorption Process ◽  
Conventional Heat Treatment ◽  
Temperature Heating ◽  
High Temperature Heating

The objective of this study is to investigate and evaluate the thermal desorption process to treat soil contaminated with high concentration of oil by applying microwave and high temperature heating element. It was found that TPH (Total Petroleum Hydrocarbon) was achieved below 2,000 mgkg-1of Korea criterion at 8kW of microwave powder and 700°C of processing temperature for 20 minutes. In addition, the rate of thermal desorption was also the highest value to be 0.09711 at 8kW of microwave powder and 700°C of processing temperature. Compared to other cases, the thermal desorption process applied by microwave had faster desorption rate of oil than conventional heat treatment process indicating that it would shorten processing time to treat oil-contaminated soil.

Surfactant-Enhanced Washing of Aged PAH Contaminated Soils: Comparison between Nonionic Surfactant and Anionic Surfactant

2014 ◽  
Vol 522-524 ◽  
pp. 316-321 ◽  
Author(s):  
He Lian Li ◽  
Rong Hui Qu ◽  
Xue Mei Han ◽  
Jia Jun Chen
Keyword(s):  
Critical Micelle Concentration ◽  
Aqueous Solutions ◽  
Anionic Surfactant ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Surfactant Concentration ◽  
Nonionic Surfactants ◽  
Low Concentration ◽  
Removal Efficiencies ◽  
Triton X

Nonionic surfactants Triton X-100 (TX100), Triton X-305 and anionic surfactant SDS were used to desorb PAHs from contaminated soil. The surfactant loss due to sorption/ precipitation and PAH removal efficiency by each surfactant were evaluated. Due to sorption/precipitation, the apparent critical micelle concentration (CMCsoil) values for the 3 surfactants are 1.3-3.8 times their corresponding CMC values in aqueous solutions. The maximal surfactant loss follows the order of SDS>>TX100>TX305. The anionic surfactant SDS is quite different from nonionic surfactants TX100 and TX305 in PAH removal. SDS can effectively remove 3-ring PAHs at very low concentration, but is not so efficient for 5 or 6-ring PAHs. While for nonionic surfactants TX100 and TX305, the removal efficiencies of PAHs increased with increasing surfactant concentration. Nonionic surfactants at low concentration cannot facilitate PAH desorption, but enhance the retardation of PAHs in soil. While anionic surfactant SDS enhanced PAH desorption at all the concentrations.

161. Methodological Issues in Ultra-Low Concentration Aerosol Sampling

2003 ◽  
Author(s):  
H. McCutcheon ◽  
D. Johnson ◽  
N. Esmen ◽  
R. Clinkenbeard
Keyword(s):  
Aerosol Sampling ◽  
Methodological Issues ◽  
Low Concentration
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