Microbial exopolymeric substances and biosurfactants as ‘bioavailability enhancers’ for polycyclic aromatic hydrocarbons biodegradation

Yesankar, Prerna J.; Pal, Mili; Patil, Ayurshi; Qureshi, Asifa

doi:10.1007/s13762-022-04068-0

Cited by 24 publications

(4 citation statements)

References 161 publications

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“…This may be due to the presence of hydrophobic alkyl groups or aromatic structures in the EPS. A thinner hydration film on the surface of hydrophobic particles reduces surface tension, facilitating the attachment of particles to the bubble surface [38]. The induction time reflects the mineralization process between bubbles and coal particles, affecting the adhesion between them and ultimately influencing flotation efficiency.…”

Section: Contact Angle and Induction Time Results Of Raw And Biotreat...mentioning

confidence: 99%

Preliminary Study on the Surface Modification of Lignite and Bioflotation by White-Rot Fungi Hypocrea lixii AH

He,

Cao,

Zhan

et al. 2023

Minerals

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The efficient utilization of lignite is a crucial area of research for the sustainable management of existing coal resources. One potential technique for cost-effective and environmentally friendly coal processing is the application of microbes or their derivatives to modify the surface of lignite for bioflotation. However, the precise process of surface modification between microbes and coal remains largely unknown. In this study, we focused on the use of a white-rot fungus called Hypocrea lixii AH and its various components, including spores, hyphae, extracellular polymer substances (EPSs), and culture solution, as biosurfactants for lignite modification. By employing techniques such as zeta potential analysis, induction time measurement, contact angle measurement, and Fourier infrared spectroscopy, we investigated the changes in the surface properties of raw and modified lignite. Furthermore, we conducted a preliminary bioflotation test using biosurfactants as collectors in order to explore the potential application of fungal modification in this context. Our results revealed that all biosurfactants were effective in improving the surface properties of lignite, with the EPS demonstrating the most prominent effect, followed by the culture solution, hyphae, and spores. The zeta potential and induction time of the modified lignite decreased, indicating enhanced hydrophilicity, while the contact angle exhibited a slight increase, suggesting a minor increase in hydrophobicity. Analysis of the Fourier infrared spectra indicated that EPS treatment resulted in the highest abundance of functional groups, including carboxyl, hydroxyl, and amidogen groups. Although fungal cells were found to improve the hydrophobicity of coal, they did not exhibit a significant effect on the flotation of lignite. Nonetheless, our findings suggest that fungal cells and their derivatives have the potential to remove or transform minerals present in lignite, particularly those containing sulfur. While they may not serve as effective bio-collectors in microflotation, their capability in mineral alteration makes them valuable candidates for lignite processing with a focus on mineral reduction.

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Section: Contact Angle and Induction Time Results Of Raw And Biotreat...mentioning

confidence: 99%

Preliminary Study on the Surface Modification of Lignite and Bioflotation by White-Rot Fungi Hypocrea lixii AH

He,

Cao,

Zhan

et al. 2023

Minerals

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“…One of the most prevalent mechanisms that contribute greatly toward the bioremediation of pesticides by biosurfactants contains counter-ion binding, electrostatic interactions, ion exchange, and precipitation-dissolution [76,77]. As a result, the soil is made productive, pollution-Perspective Chapter: Tapping Significance of Microbial Surfactants as a Biopesticide… DOI: http://dx.doi.org/10.5772/intechopen.111747 free, and fit for agricultural cultivation [78,79]. A natural, budget-friendly, and environmentally sustainable method of degrading pesticides and other xenobiotics on-site is only possible through microbial biosurfactant-based remediation [18].…”

Section: Biosurfactants and Their Mechanisms Involved In Remediating ...mentioning

confidence: 99%

Perspective Chapter: Tapping Significance of Microbial Surfactants as a Biopesticide and Synthetic Pesticide Remediator – An Ecofriendly Approach for Maintaining the Environmental Sustainability

Gaikwad¹

2023

Insecticides - Advances in Insect Control and Sustainable Pest Management

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Pests are the major concern for plant infections that affect the agriculture production drastically and result in the loss of economy. Regular use of synthetic chemicals develops resistance in pests and affects soil, plant, and human health. The development and promotion of green technology facilitated by microbiota helps in maintaining a healthy environment. Molecules of microbial origin are well-known elicitors for stimulating and sustaining the plant immune system and fertility level of the soil. They compete with the pathogens for resources like food and space, activate the inherent defenses of plants, synthesize antimicrobial chemicals, or other metabolites that degrade and remediate synthetic chemicals. Biosurfactant (BS) is an important amphiphilic molecule with polar and non-polar. Its structure contributes to its high biodegradability, low toxicity, and stability in harsh environments. In the chapter, the multifunctional properties of biosurfactants, methods used for evaluating their biosurfactant producing abilities, methods used for identification, and characterization of the chemical structure of biosurfactants, along with the significance of metagenomics documented. The mechanisms of biosurfactants in controlling the growth of pests and their importance as pesticide remediations are also discussed.

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“…The literature discusses the stimulating or positive effect of BSs on the biodegradation of hydrocarbon pollutants in the environment. Thus, BSs facilitate the solubilization and/or removal of hydrophobic substances, complex hydrocarbons, and crude oils from soil and sand particles ( Jahan et al, 2020 ; Yesankar et al, 2022 ). BSs have been widely reported for solubilization and/or remediation of pollutants to improve the quality of agricultural soil ( Sachdev and Cameotra, 2013 ).…”

Section: Role Of Biosurfactants In Improving Soil Quality Through The...mentioning

confidence: 99%

Biosurfactants’ multifarious functional potential for sustainable agricultural practices

Karamchandani

Pawar

et al. 2022

Front. Bioeng. Biotechnol.

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Increasing food demand by the ever-growing population imposes an extra burden on the agricultural and food industries. Chemical-based pesticides, fungicides, fertilizers, and high-breeding crop varieties are typically employed to enhance crop productivity. Overexploitation of chemicals and their persistence in the environment, however, has detrimental effects on soil, water, and air which consequently disturb the food chain and the ecosystem. The lower aqueous solubility and higher hydrophobicity of agrochemicals, pesticides, metals, and hydrocarbons allow them to adhere to soil particles and, therefore, continue in the environment. Chemical pesticides, viz., organophosphate, organochlorine, and carbamate, are used regularly to protect agriculture produce. Hydrophobic pollutants strongly adhered to soil particles can be solubilized or desorbed through the usage of biosurfactant/s (BSs) or BS-producing and pesticide-degrading microorganisms. Among different types of BSs, rhamnolipids (RL), surfactin, mannosylerythritol lipids (MELs), and sophorolipids (SL) have been explored extensively due to their broad-spectrum antimicrobial activities against several phytopathogens. Different isoforms of lipopeptide, viz., iturin, fengycin, and surfactin, have also been reported against phytopathogens. The key role of BSs in designing and developing biopesticide formulations is to protect crops and our environment. Various functional properties such as wetting, spreading, penetration ability, and retention period are improved in surfactant-based formulations. This review emphasizes the use of diverse types of BSs and their source microorganisms to challenge phytopathogens. Extensive efforts seem to be focused on discovering the innovative antimicrobial potential of BSs to combat phytopathogens. We discussed the effectiveness of BSs in solubilizing pesticides to reduce their toxicity and contamination effects in the soil environment. Thus, we have shed some light on the use of BSs as an alternative to chemical pesticides and other agrochemicals as sparse literature discusses their interactions with pesticides. Life cycle assessment (LCA) and life cycle sustainability analysis (LCSA) quantifying their impact on human activities/interventions are also included. Nanoencapsulation of pesticide formulations is an innovative approach in minimizing pesticide doses and ultimately reducing their direct exposures to humans and animals. Some of the established big players and new entrants in the global BS market are providing promising solutions for agricultural practices. In conclusion, a better understanding of the role of BSs in pesticide solubilization and/or degradation by microorganisms represents a valuable approach to reducing their negative impact and maintaining sustainable agricultural practices.

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Microbial exopolymeric substances and biosurfactants as ‘bioavailability enhancers’ for polycyclic aromatic hydrocarbons biodegradation

Cited by 24 publications

References 161 publications

Preliminary Study on the Surface Modification of Lignite and Bioflotation by White-Rot Fungi Hypocrea lixii AH

Preliminary Study on the Surface Modification of Lignite and Bioflotation by White-Rot Fungi Hypocrea lixii AH

Perspective Chapter: Tapping Significance of Microbial Surfactants as a Biopesticide and Synthetic Pesticide Remediator – An Ecofriendly Approach for Maintaining the Environmental Sustainability

Biosurfactants’ multifarious functional potential for sustainable agricultural practices

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