Pyrene fate affected by humic acid amendment in soil slurry systems

Liang, Yanna; Sorensen, Darwin L.; McLean, Joan E.; Sims, Ronald C.

doi:10.1186/1754-1611-2-11

Cited by 6 publications

(1 citation statement)

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“…Table 1 illustrates the variables and their corresponding levels. The levels of the factors were on the base of previous studies in literature for PAHs bioremediation [ 14 , 19 - 21 ].…”

Section: Methodsmentioning

confidence: 99%

Experimental design approach to the optimization of PAHs bioremediation from artificially contaminated soil: application of variables screening development

Ravanipour

Kalantary

Mohseni-Bandpi

et al. 2015

J Environ Health Sci Engineer

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BackgroundThe effectiveness of bioremediation systems for PAH-contaminated soil may be constrained by physicochemical properties of contaminants and environmental factors. Information on what is the most effective factor in bioremediation process is essential in the decision of what stimulations can be taken to assist the biodegradation efficacy.MethodsIn this study, four factors of surfactant (Tween 80), humic acid (HA), salinity and nutrients in a 24 full factorial design were screened in bioremediation of phenanthrene contaminated soil by using a consortium of bacteria.ResultsBetween the employed levels of the factors only salinity had not significant effect. Optimal concentrations of surfactant, HA and nutrient were obtained by a response surface design. For phenanthrene biodegradation, a central composite face centred design (CCFD) showed that nutrient, surfactant and HA concentrations had highly significant, significant and insignificant effects, respectively. The best conditions with 87.1% phenanthrene biodegradation were 150 mg HA/Kg soil, 12.68 μg/L surfactant, and nutrients as K2HPO4, 0.8; KH2PO4, 0.2 and KNO3, 1 g/L. A high similarity was between the model prediction and experimental results.ConclusionsThis study showed that nutrient with 81.27% efficiency could be considered as the most effective factor for practical implications of bioremediation process for PAHs contaminated soil cleanup strategies.

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“…Table 1 illustrates the variables and their corresponding levels. The levels of the factors were on the base of previous studies in literature for PAHs bioremediation [ 14 , 19 - 21 ].…”

Section: Methodsmentioning

confidence: 99%