Journal Article•
Immobilization of combined bacteria and its degradation of benzo[a]pyrene in contaminated soil
TL;DR: In this paper, a co-immobilization carrier and a method were investigated, which could used for screening degrade benzo[a]pyrene(BaP) in the contaminated soil efficiently, which indicated that the degradation rates of BaP by Bacillus sp.SB02, were 33.0% in 42 days, when the initial concentrations was 50 mg·kg-1 in soil.
Abstract: A strain autochthonous fungus and a strain bacterium identified as Bacillus sp.and Mucor sp.They were isolated from a contaminated soil and were studied for their co-immobilization.The co-immobilization carrier and the method were investigated,which could used for screening degrade benzo[a]pyrene(BaP) in the contaminated soil efficiently.The results indicated that the degradation rates of BaP by Bacillus sp.SB02,were 33.0% in 42 days,when the initial concentrations was 50 mg·kg-1 in soil.The degradation rates per day of BaP Mucor sp.SF06 were 69.7% in 42 days.The degradation rate of BaP by Mucor sp.SF06 was the most rapid.The optimum immobilized carrier was modified vermiculite,and it is better mass transferred.It could degrade 95.32% of BaP in 42 days,which was remarkably higher than the degradation rate of that by the free strains.The microstructure of immobilized mixture microorganism was observed by scanning electron microscope(SEM).Also,the process of the transmission in soil was discussed.
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TL;DR: In this article, the effect of polycyclic aromatic hydrocarbon and highly effective degradation fungi Mucor mucedo (MU) was studied on corncob decomposition in Pyr-contaminated soil for 120 days to identify the impact of degradable immobilized carrier on the remediation of soil contaminated by persistent organic pollutants.
Abstract: The effect of polycyclic aromatic hydrocarbon and highly effective degradation fungi Mucor mucedo (MU) was studied on corncob decomposition in Pyr-contaminated soil for 120 days to identify the impact of a degradable immobilized carrier on the remediation of soil contaminated by persistent organic pollutants. Results showed that the corncob was mainly composed of hemicelluloses, cellulose, and water dissolved (WD) material, which accounted for 85 percent of its total weight. MU addition significantly affected corncob decomposition. Thus, humic acid production and WD and benzene-ethanol dissolved material degradation increased. The peaking of the WD content was delayed for 30 days or more. The extractable pyrene content positively correlated with the WD content in the corncob during the decomposition. These results theoretically support a refined remediation principle of immobilized microorganisms.
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Cites background from "Immobilization of combined bacteria..."
...After analysing the degradation dynamics of benzo[a]pyrene in soil, Wang et al. (2011) found that immobilized mixed bacteria made by adsorption with vermiculite as a carrier exhibited effective mass transfer performance; its B[a]P degradation rate was 20% higher than that of free fungi....
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