Application of acclimated sewage sludge as a bio-augmentation/bio-stimulation strategy for remediating chlorpyrifos contamination in soil with/without cadmium

Wang, Can; Zhou, Zhiren; Liu, Hongdan; Li, Junjie; Wang, Ying; Xu, Heng

doi:10.1016/j.scitotenv.2016.11.044

Cited by 29 publications

(8 citation statements)

References 55 publications

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“…At 16th day more degradation (66%) was noted with 75 mg kg −1 of CP and less degradation (43) was noted with 125 mg kg −1 of CP. The 2 main reasons which impact the CP degradation are as follows; firstly, as the parent pollutant (CP) concentration decreases the attractive forces between soil particles and CP molecules increases 11 . Secondly, the growth of bacterial population was hindered due to the accumulation of intermediate metabolites 29 .…”

Section: Resultsmentioning

confidence: 99%

“…The whole experiment lasted for 30 days with 10 6 cells g −1 40 . The use of sewage sludge for improving bioaugmentation was tested and found effective 41 . Jariyal et al 42 has reported that instead of single strain, consortia can be used for better degradation.…”

Section: Resultsmentioning

confidence: 99%

“…Bioremediation has successfully decontaminated agricultural soils, wetlands, sludge and ground water 8 . Pesticides contaminated soil can be restored by injecting specific microbes 9 – 11 . Pesticide polluted soils are the most appropriate site to find out the resistant microbes.…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of chlorpyrifos using isolates from contaminated agricultural soil, its kinetic studies

Farhan

Ahmad

Kanwal³

et al. 2021

Sci Rep

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Extensive pesticides use is negatively disturbing the environment and humans. Pesticide bioremediation with eco-friendly techniques bears prime importance. This study evaluates the bioremediation of chlorpyrifos in soil using indigenous Bacillus cereus Ct3, isolated from cotton growing soils. Strains were identified through ribotyping (16s rRNA) by Macrogen (Macrogen Inc. Geumchen-gu, South Korea). Bacillus cereus Ct3 was resistant up to 125 mg L−1 of chlorpyrifos and successfully degraded 88% of chlorpyfifos in 8 days at pH 8. Bacillus cereus Ct3 tolerated about 30–40 °C of temperature, this is a good sign for in situ bioremediation. Green compost, farmyard manure and rice husk were tested, where ANOVA (P < 0.05) and Plackett–Burman design, results indicated that the farm yard manure has significant impact on degradation. It reduced the lag phase and brought maximum degradation up to 88%. Inoculum size is a statistically significant (P < 0.05) factor and below 106 (CFU g−1) show lag phase of 4–6 days. Michaelis–Menten model results were as follows; R2 = 0.9919, Vmax = 18.8, Ks = 121.4 and Vmax/Ks = 0.1546. GC–MS study revealed that chlorpyrifos first converted into diethylthiophosphoric acid and 3,5,6-trichloro-2-pyridinol (TCP). Later, TCP ring was broken and it was completely mineralized without any toxic byproduct. Plackett–Burman design was employed to investigate the effect of five factors. The correlation coefficient (R2) between experimental and predicted value is 0.94. Central composite design (CBD) was employed with design matrix of thirty one predicted and experimental values of chlorpyrifos degradation, having “lack of fit P value” of “0.00”. The regression coefficient obtained was R2 = 0.93 which indicate that the experimental vales and the predicted values are closely fitted. The most significant factors highlighted in CBD/ANOVA and surface response plots were chlorpyrifor concentration and inoculum size. Bacillus cereus Ct3 effectively degraded chlorpyrifos and can successfully be used for bioremediation of chlorpyrifos contaminated soils.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Biodegradation of chlorpyrifos using isolates from contaminated agricultural soil, its kinetic studies

Farhan

Ahmad

Kanwal³

et al. 2021

Sci Rep

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“…8,9 With the superiority of microbial metabolism, biological remediation has been considered as an abundant, permanent and non-invasive alternative for the removal of contaminants. 10,11 The biodegradation of pesticides is mainly carried out by microorganisms, which secrete a large number of enzymes. Enzymatic sanitation is a fast and highly effective technique for removing pesticide residues from the environment.…”

Section: Introductionmentioning

confidence: 99%

The remediation of chlorpyrifos-contaminated soil by immobilized white-rot fungi

Wang

Song

et al. 2020

J Serb Chem Soc

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This research focused on the degradation of chlorpyrifos via immobilized white rot fungi in soil, with the aim to select excellent degrading strains and an optimal carrier of white rot fungi. Immobilization of white rot fungi was assessed on corn stover, wheat straw, peanut shells, wood chip, and corn cobs. Phlebia sp., Lenzites betulinus and Irpex lacteus were grown in defined nutrient media for the remediation of pesticide-contaminated soils. The carrier of the biomass was determined by observing the growth of white rot fungi. The results showed that corn stover and wheat straw are suitable carriers of the immobilized white rot fungi and that Phlebia sp. and Lenzites betulinus have a positive effect on the degradation of chlorpyrifos. At 30 °C and neutral pH, the degradation rate of chlorpyrifos was 74.35 %, Phlebia sp. being immobilized by corn stover in 7 days, which was the best result compared to other combinations of strains and carriers. The orthogonal experiment showed that the pH value and temperature affected the pollutant degradability more than the initial concentration and the biomass dosage.

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“…Based on its physicochemical properties, multiple strategies via physical, chemical and/or biological treatments were broadly investigated so far, attempting to find efficient solutions for chlorpyrifos removal in realistic matrices 12 – 14 . Taking the advantages of plant/microbe metabolism, biological remediation has been extensively studied as abundant, permanent, safe, viable and non-invasive alternatives for pollutant elimination 15 , 16 . Among these, bioremediation by microorganisms possessing unique capacity of utilizing synthetic chemicals as their sole carbon and energy source has emerged as the most advantageous method for cleaning-up contaminants 17 .…”

Section: Introductionmentioning

confidence: 99%

Toxicity assessment of chlorpyrifos-degrading fungal bio-composites and their environmental risks

Liu

Zhang

Yang

et al. 2018

Sci Rep

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Bioremediation techniques coupling with functional microorganisms have emerged as the most promising approaches for in-situ elimination of pesticide residue. However, the environmental safety of bio-products based on microorganisms or engineered enzymes was rarely known. Here, we described the toxicity assessment of two previously fabricated fungal bio-composites which were used for the biodegradation of chlorpyrifos, to clarify their potential risks on the environment and non-target organisms. Firstly, the acute and chronic toxicity of prepared bio-composites were evaluated using mice and rabbits, indicating neither acute nor chronic effect was induced via short-term or continuous exposure. Then, the acute mortality on zebrafish was investigated, which implied the application of fungal bio-composites had no lethal risk on aquatic organisms. Meanwhile, the assessment on soil organic matters suggested that no threat was posed to soil quality. Finally, by monitoring, the germination of cabbage was not affected by the exposure to two bio-products. Therefore, the application of fungal bio-composites for chlorpyrifos elimination cannot induce toxic risk to the environment and non-target organisms, which insured the safety of these engineered bio-products for realistic management of pesticide residue, and provided new insights for further development of bioremediation techniques based on functional microorganisms.

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Application of acclimated sewage sludge as a bio-augmentation/bio-stimulation strategy for remediating chlorpyrifos contamination in soil with/without cadmium

Cited by 29 publications

References 55 publications

Biodegradation of chlorpyrifos using isolates from contaminated agricultural soil, its kinetic studies

Biodegradation of chlorpyrifos using isolates from contaminated agricultural soil, its kinetic studies

The remediation of chlorpyrifos-contaminated soil by immobilized white-rot fungi

Toxicity assessment of chlorpyrifos-degrading fungal bio-composites and their environmental risks

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