Bioremediation of a soil contaminated by lindane utilizing the fungus Ganoderma australe via response surface methodology

Rigas, Fotis; Παπαδοπούλου, Κωνσταντίνα; Dritsa, V.; Doulia, Danae

doi:10.1016/j.jhazmat.2006.09.035

Cited by 97 publications

(32 citation statements)

References 28 publications

(22 reference statements)

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“…The present findings are in accordance with those of many investigators who reported that the kinetics of pesticide degradation is commonly biphasic with a very rapid degradation rate at the beginning followed by a very slow prolonged dissipation (Alexander 1994;Jones et al 1996;Rigas et al 2007;Osman et al 2009). The relative importance of the phases depends on the availability of the pollutants, hydrophobicity, and affinity for organic matter.…”

Section: Resultssupporting

confidence: 93%

Safety methods for chlorpyrifos removal from date fruits and its relation with sugars, phenolics and antioxidant capacity of fruits

et al. 2012

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The effectiveness of different postharvest wash treatments at two levels (10 and 20 g/l) for different dipping times was determined to remove chlorpyrifos from date fruits treated at concentration of 2 mg/l. The recovered amount of chlorpyrifos was extracted based on the solid phase extraction (SPE) method and then analyzed by gas chromatography with mass spectrometry (GC-MS). The results demonstrate that the removal of chlorpyrifos increased in the order of acetic acid (AA)> citric acid (CA)> hydrogen peroxide (H 2 O 2 )> potassium permanganate (KMnO 4 )> running water (H 2 O), and the percent of pesticide residue on date fruits depended on the concentration of tested washing treatments and dipping time without the formation of the toxic by-product, chlorpyrifos-oxon. Kinetic studies revealed that chlorpyrifos was found to be more easily removable from date fruits treated with the tested chemical solutions with t 1/2 values of 12-29 min compared with roughly 53 min in case of running water. The impact of these washing treatments on quality of date fruits illustrated that all treatments exerted a little negative effect on total sugars content but H 2 O 2 and KMnO4 at level of 2 % had more drastic effect. Whereas, running water, 10 and 20 g/l CA caused significant increases in total phenolic contents, during all the tested contact times compared with control. Except the insignificant effect of KMnO 4 treatments, antioxidant capacity of date fruits tended to increase in all wash treatments, when the contact times were 5 or 15 min.

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Section: Resultssupporting

confidence: 93%

Safety methods for chlorpyrifos removal from date fruits and its relation with sugars, phenolics and antioxidant capacity of fruits

et al. 2012

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“…Ongoing research and development seeking to improve methods by minimizing the number of experiments provide information about the direct additive effects of the study variables and interaction effects using design of experiment methods. Recently, this statistical technique has been successfully applied in many fields [22,[32][33][34]. The statistical experiment designs most widely used in optimization experiments are termed response surface designs [22,[32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Factorial Designs Application to Study Enhanced Bioremediation of Soil Artificially Contaminated with Weathered Bonny Light Crude Oil through Biostimulation and Bioaugmentation Strategy

Agarry¹,

Ogunleye²

2012

JEP

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The objective of this study was designed to evaluate the effects of biostimulation and bioaugmentation amendment agents (NPK fertilizer, Tween 80 and mixed culture) on the bioremediation of tropical soil samples artificially contaminated with Weathered Bonny Light Crude Oil (WBLCO). Response Surface Methodology (RSM) with Box Behnken Design (BBD) was used with three levels and three factors of NPK fertilizer (2 -6 g), Tween 80 (5 -15 mg/l) and mixed culture (0.5 -1.5 g/l) as independent variables and WBLCO removal as dependent variable (response) in a six weeks remediation period. The results showed that the rate of WBLCO removal generally increased with increase in the amount of NPK fertilizer, Tween 80 and mixed culture (biomass), respectively. A statistically significant (P < 0.0001) second-order quadratic regression model for WBLCO removal (using design-expert statistical program (v. 6.0.8)) with a coefficient of determination, R (=0.9996) was obtained. Numerical optimization technique based on desirability function was carried out to optimize the bioremediation process. The optimum values for biostimulation and bioaugmentation amendment agents to achieve a predicted maximum WBLCO removal of 84.88 percent were found to be: NPK fertilizer, 4.25 g; Tween 80, 10.22 mg/l and mixed culture, 0.46 g/l. At this optimum point, the observed WBLCO removal was found to be 83.79 percent. The statistical analyses and the closeness of the experimental results and model predictions show the reliability of the regression model and thus, biostimulation and bioaugmentation of indigenous microbial density and activity can reduce remediation period of petroleum hydrocarbon contaminated environment and subsequently the cost of remediation.

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“…It has been shown that fungal peroxidases and dioxygenases are involved in biodegradation of pentachlorophenol (64,65). The ligninolytic fungus Ganoderma australe, isolated from the stone pine (Pinus pinea), is a good biodegrader of lindane (66). This elegant work describes several parameters which has to considered to improve biodegradation like lag time, propagation velocity, biomass growth rate, biodegradation rate, biodegradation/biomass, biomass/propagation and biomass content.…”

Section: Myco-and Phycoremediatorsmentioning

confidence: 99%

Biodegradation and Bioremediation of Organic Pesticides

Velázquez-Fernández¹,

Martínez-Rizo²,

Ramírez-Sandoval³

et al. 2012

Pesticides - Recent Trends in Pesticide Residue Assay

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Bioremediation of a soil contaminated by lindane utilizing the fungus Ganoderma australe via response surface methodology

Cited by 97 publications

References 28 publications

Safety methods for chlorpyrifos removal from date fruits and its relation with sugars, phenolics and antioxidant capacity of fruits

Safety methods for chlorpyrifos removal from date fruits and its relation with sugars, phenolics and antioxidant capacity of fruits

Factorial Designs Application to Study Enhanced Bioremediation of Soil Artificially Contaminated with Weathered Bonny Light Crude Oil through Biostimulation and Bioaugmentation Strategy

Biodegradation and Bioremediation of Organic Pesticides

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