Hydrocarbon Soil Treatment Test with Sodium Dodecyl Sulfate (SDS) (Published)
The depollution test was carried out through the surfactant washing process. The effects of variation in SDS concentration (0.5-1 g/L), contact time (10-60 min) and soil particle size (<50 μm – <250 μm) were studied on the efficiency of depollution through a complete factorial plan. Quantitative analyzes performed on the different fractions of a soil sample showed that the fine fraction (<50μm) is the most polluted. In fact, the contents of n-alkanes in soil particles of sizes <50 μm range from 4.79 to 65.90 μg/g of sample MS and in sizes of <250 μm, from 0.91 to 30 μm, 70 μg/g of MS. PAH contents in fractions <50μm range from 3.46 to 103.5 μg/g of sample MS and in fractions <250 μm, from 2.90 μg/g to 21.85 μg/g of MS. These hydrocarbon levels obtained are much higher than the guide values defined by the French Environment and Energy Management Agency. The application of this washing process has made it possible to achieve overall hydrocarbon abatement rates of up to 97.3%. As a result, the optimum for the minimum content of residual hydrocarbons (≈10 μg/g DM) is obtained at a concentration of 0.75 g/L, a contact time of 60 min and a particle size of soil < 50 μm. This process, which makes it possible to obtain an interesting yield of extraction of pollutants, could thus be used for the remediation of soils and sediments polluted by hydrocarbons in general and PAHs in particular.
Keywords: SDS, Soil, Test, Treatment., hydrocarbons
Using Dissemination of Antibiotic Resistant Bacteria (ARB) and Resistance Genes (ARG) for Wastewater Treatment (Published)
This investigation was directed to assess the impact of wastewater treatment forms on the pervasiveness of anti-infection obstruction fecal coliform (FC) and anti-toxin opposition qualities (ARGs) of FC. What’s more, the event of anti-infection safe microscopic organisms (ARB) and anti-toxin safe qualities (ARGs) in surface waters accepting wastewater was assessed. More noteworthy opposition against penicillin (P), colistin (CT) and ampicillin (AMP) were watched for FC disconnected from profluent purified by chlorine (71%), than that cleaned by UV (45%). The best opposition against six anti-infection agents was recorded for FC secludes from emanating purified by chlorine. The pervasiveness of test and blaSHV was most reduced in disconnects from chlorine-purified effluents. The event of ARG blaSHV was most astounding in FC disconnected from emanating sterilized by UV. A critical relationship was recorded between FC levels in surface waters and the degree of bacterial protection from ampicillin (P < 0.05) and to chloramphenicol (P < 0.05). AmpC and blaPSE1 were more pervasive than blaSHV in effluents and in surface waters. TetA and tests were profoundly pervasive in surface water contrasted with test. The consequences of the examination exhibit across the board pervasiveness of ARB and ARG in wastewater and accepting water bodies. The outcome shows that the wellspring of ARB and ARG in surface waters start from wastewater. Discharged ARB and ARG may fill in as the wellspring of ARG to pathogenic microscopic organisms in surface waters. Sanitization procedures may impact the choice of anti-infection safe examples of microorganisms.
Keywords: Antibiotic resistant bacteria, Disinfection, Genes, Treatment., wastewater