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Two strains named W7 and W16 were isolated by liquid enrichment culture from the corn field where atrazine has been chronically applied. Observed by gram stain and SEM, W7 belonged to gram-positive bacteria and the single cell was short bacilliform; W16 belonged to gram-negative bacteria and the single cell was spherical. Through physiological and identification and 16SrDNA sequence analysis, two...
Soil pollution is a worldwide problem. Both inorganic and persistent organic pollutants (POPs) possess high toxicity and long-term persistence. Biosurfactant based remediation technologies for contaminated soil are of increasing importance recently, and they have been demonstrated to be effective in uptaking both heavy metals such as Cd, Pb, Zn, Cu, and organic pollutants like hydrophobic organic...
Oxidation ponds are widely used for wastewater treatment in developing countries because of the relative simplicity and low operating costs. Thanks to the permeability of the soil layer at the bottom of ponds, contaminants can go into groundwater from wastewater during its residence period. In this study, about 14 shallow groundwater samples were collected from pumping wells around an oxidation pond...
Soil slurry reactor technology is one of the effective methods for treating PAHs contaminated soil. In this paper, removal of high molecular weight PAHs, Indeno (1,2,3-cd) pyrene (Inp), was studied in soil slurry reactors with isolated bacteria from PAHs contaminated soil. The factors affecting Inp biodegradation and the optimal conditions were investigated using orthogonal experimental design (L9(34))...
This paper is a pilot study on the effect of grass- microorganism combined bioremediation of atrazine contaminated soil. Sorghum hybird sudangrass and ryegrass were selected as two repair grass, and immobilized degrading strain J2 was added into the soil under the indoor pot conditions. When the concentration of atrazine was 20 mg/kg in the soil, grass-microorganism combined bioremediation enjoyed...
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