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Sani A, Qin WQ, Li JY, Liu YF, Zhou L, Yang SZ, Mu BZ. Structural diversity and applications of lipopeptide biosurfactants as biocontrol agents against phytopathogens: A review. Microbiol Res 2024; 278:127518. [PMID: 37897841 DOI: 10.1016/j.micres.2023.127518] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 10/10/2023] [Accepted: 10/10/2023] [Indexed: 10/30/2023]
Abstract
Amphipathic compounds known as biosurfactants are able to reduce surface and interfacial tensions. These substances produced by microbial organisms perform the same functions as chemical surfactants with several enhancements, the most significant of which is biocontrol activity. Lipopeptide is one of the five biosurfactants from natural resources and is identified as the best alternative for chemical surfactants and the major topic of interest for both scientific and industrial communities due to their increasingly growing potential applications in biological and commercial fields. These are the biological compounds with very less toxicity level that increase their importance in the pesticide industry. In this article we summarize the structural diversity of the microbial lipopeptide biosurfactants and focus on their applications as biocontrol agents in plants, covering (1) an intensive study of the structural diversity of lipopeptide biosurfactants originated primarily by the Bacillus, Pseudomonas, Cyanobacteria, and Actinomycetes species is presented, (2) the comparative study of advantages and disadvantages of characterization techniques and physicochemical properties which have a major role in biocontrol activity of microbial lipopeptides, and (3) their wide range biocontrol applications as systemic resistance inducers against different plant diseases, resistance against phytopathogens by alteration of wettability of plant surfaces and antimicrobial activities of important bioactive lipopeptides produced from Bacillus strains.
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Affiliation(s)
- Asma Sani
- State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; Engineering Research Center for Microbial Enhanced Oil Recovery, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Wan-Qi Qin
- State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; Engineering Research Center for Microbial Enhanced Oil Recovery, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Jia-Yi Li
- State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; Engineering Research Center for Microbial Enhanced Oil Recovery, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Yi-Fan Liu
- State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China; Engineering Research Center for Microbial Enhanced Oil Recovery, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Lei Zhou
- State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China; Engineering Research Center for Microbial Enhanced Oil Recovery, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Shi-Zhong Yang
- State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China; Engineering Research Center for Microbial Enhanced Oil Recovery, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Bo-Zhong Mu
- State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China; Engineering Research Center for Microbial Enhanced Oil Recovery, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China.
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2
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Giwa A, Chalermthai B, Shaikh B, Taher H. Green dispersants for oil spill response: A comprehensive review of recent advances. MARINE POLLUTION BULLETIN 2023; 193:115118. [PMID: 37300957 DOI: 10.1016/j.marpolbul.2023.115118] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 05/19/2023] [Accepted: 05/28/2023] [Indexed: 06/12/2023]
Abstract
Green dispersants are so-called "green" because they are renewable (from bio-based sources), non-volatile (from ionic liquids), or are from naturally available solvents (vegetable oils). In this review, the effectiveness of different types of green dispersants, namely, protein isolates and hydrolysates from fish and marine wastes, biosurfactants from bacterial and fungal strains, vegetable-based oils such as soybean lecithin and castor oils, as well as green solvents like ionic liquids are reviewed. The challenges and opportunities offered by these green dispersants are also elucidated. The effectiveness of these dispersants varies widely and depends on oil type, dispersant hydrophilicity/hydrophobicity, and seawater conditions. However, their advantages lie in their relatively low toxicity and desirable physico-chemical properties, which make them potentially ecofriendly and effective dispersants for future oil spill response.
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Affiliation(s)
- Adewale Giwa
- Chemical and Water Desalination Engineering Program, Mechanical & Nuclear Engineering (MNE) Department, College of Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates.
| | - Bushra Chalermthai
- Bio-Circular-Green-economy Technology & Engineering Center, BCGeTEC, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand
| | - Bismah Shaikh
- Sustainable Energy Development Research Group, Sustainable Energy and Power Systems Research Center, Research Institute for Sciences and Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates
| | - Hanifa Taher
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates; Research and Innovation Center on CO(2) and H(2) (RICH), Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
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3
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Lang JQ, Mtui HI, Gang HZ, Mu BZ, Yang SZ. Highly Ca 2+-Ion-Tolerant Biobased Zwitterionic Surfactant with High Interfacial Activity. ACS OMEGA 2022; 7:32775-32783. [PMID: 36120073 PMCID: PMC9476214 DOI: 10.1021/acsomega.2c04642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
The wide application of surfactants has a harmful effect on the environment, drawing more attention to the development and application of low-toxicity surfactants. A salt-tolerant and low-toxicity biobased zwitterionic surfactant, N,N-dimethyl-N-[2-hydroxy-3-sulfo-propyl]-N-benzyloxyoctadecanoyl-1,3-propanediamine (SPBOPA), was prepared from the oleic acid extracted from waste oils and anise ether extracted from the tarragon. The final surfactant structure was confirmed using gas chromatography-mass spectrometry (GC-MS), liquid chromatography-mass spectrometry (LC-MS), and 1H nuclear magnetic resonance (NMR) spectroscopy. The SPBOPA surfactant could reduce the interfacial tension between crude oil and formation brine to ultralow (5.2 × 10-4 mN/m) at a low dosage without extra alkali. It still had good interfacial properties in NaCl up to 60 g/L, Ca2+ up to 2000 mg/L, and temperature up to 100 °C. Furthermore, SPBOPA had strong antidilution and antiadsorption properties with low toxicity as demonstrated by the high LD50 value of >5000 mg/kg·BW. It could also enhance the wetting ability of crude oil surfaces. Meanwhile, it showed a high biodegradability in the environment. All of the results achieved in this work confirmed that the SPBOPA surfactant is a more robust and promising biobased surfactant candidate than traditional surfactants as an eco-friendly surfactant for enhanced oil recovery (EOR).
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Affiliation(s)
- Jian-Qiao Lang
- State
Key Laboratory of Bioreactor Engineering and School of Chemistry and
Molecular Engineering, East China University
of Science and Technology, Meilong 130, Shanghai 200237, P. R. China
| | - Homely Isaya Mtui
- State
Key Laboratory of Bioreactor Engineering and School of Chemistry and
Molecular Engineering, East China University
of Science and Technology, Meilong 130, Shanghai 200237, P. R. China
| | - Hong-ze Gang
- State
Key Laboratory of Bioreactor Engineering and School of Chemistry and
Molecular Engineering, East China University
of Science and Technology, Meilong 130, Shanghai 200237, P. R. China
- Engineering
Research Center of Microbial Enhanced Oil Recovery, Ministry of Education, Shanghai 200237, P. R. China
| | - Bo-Zhong Mu
- State
Key Laboratory of Bioreactor Engineering and School of Chemistry and
Molecular Engineering, East China University
of Science and Technology, Meilong 130, Shanghai 200237, P. R. China
- Engineering
Research Center of Microbial Enhanced Oil Recovery, Ministry of Education, Shanghai 200237, P. R. China
- Shanghai
Collaborative Innovation Center for Bio-manufacturing Technology, Shanghai 200237, P. R. China
| | - Shi-Zhong Yang
- State
Key Laboratory of Bioreactor Engineering and School of Chemistry and
Molecular Engineering, East China University
of Science and Technology, Meilong 130, Shanghai 200237, P. R. China
- Engineering
Research Center of Microbial Enhanced Oil Recovery, Ministry of Education, Shanghai 200237, P. R. China
- Shanghai
Collaborative Innovation Center for Bio-manufacturing Technology, Shanghai 200237, P. R. China
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Chauhan V, Dhiman VK, Kanwar SS. Purification and characterization of a novel bacterial Lipopeptide(s) biosurfactant and determining its antimicrobial and cytotoxic properties. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Dos Santos RA, Rodríguez DM, Ferreira INDS, de Almeida SM, Takaki GMDC, de Lima MAB. Novel production of biodispersant by Serratia marcescens UCP 1549 in solid-state fermentation and application for oil spill bioremediation. ENVIRONMENTAL TECHNOLOGY 2022; 43:2956-2967. [PMID: 33775228 DOI: 10.1080/09593330.2021.1910733] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
Oil spills in aquatic ecosystems cause irreparable damage to marine life and the coastal populations of affected areas. In recent years, chemical dispersants have been extensively used to remedy these impacted ecosystems, although these agents have been increasingly restricted due to their toxic potential. In this context, biosurfactants are emerging as a promising alternative to chemical dispersants, which have some advantages including low toxicity, high biodegradability and good ecological acceptability. Thus, this study aimed to the production of biosurfactant by the bacteria Serratia marcescens UCP 1549 for application as biodispersant. The experiment was carried out using wheat bran as substrate in solid-state fermentation (SSF) as low-cost technology. Biosurfactant production was verified by the reduction of surface tension (28.4 mN/m) and interfacial tension (4.1 mN/m) with n-hexadecane. Also, promising result of emulsification (94%) with burned motor oil was obtained. Acid precipitation yielded 52.0 g/kg dry substrate of biosurfactant, that was identified as an anionic compound of a lipopeptide nature by the Zeta potential and FTIR spectrum, respectively. The biomolecule showed stability under extreme conditions of temperature, pH and salinity, as well as low toxicity against the microcrustacean Artemia salina. In addition, the biosurfactant demonstrated excellent properties to dispersing burned motor oil in water (ODA = 50.24 cm2) and to washing of marine stones (100% removal of burned motor oil). Therefore, these results confirm SSF as a sustainable technology for the production of biodispersant by S. marcescens UCP 1549, promising in the bioremediation of marine ecosystems impacted by petroderivatives.
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Affiliation(s)
- Renata Andreia Dos Santos
- Post-graduation Program in Development of Environmental Processes, Catholic University of Pernambuco Recife, Brazil
- Nucleus of Research in Environmental Sciences and Biotechnology, Catholic University of Pernambuco, Recife, Brazil
| | - Dayana Montero Rodríguez
- Nucleus of Research in Environmental Sciences and Biotechnology, Catholic University of Pernambuco, Recife, Brazil
- National Post-Doctorate Program (PNPD-CAPES), Post-Graduation Program in Development of Environmental Processes, Catholic University of Pernambuco, Recife, Brazil
| | - Isabela Natália da Silva Ferreira
- Nucleus of Research in Environmental Sciences and Biotechnology, Catholic University of Pernambuco, Recife, Brazil
- Doctorate Northeast Network for Biotechnology, Federal Rural University of Pernambuco, Recife, Brazil
| | - Sérgio Mendonça de Almeida
- Nucleus of Research in Environmental Sciences and Biotechnology, Catholic University of Pernambuco, Recife, Brazil
- Department of Biology, Catholic University of Pernambuco, Recife, Brazil
| | - Galba Maria de Campos Takaki
- Nucleus of Research in Environmental Sciences and Biotechnology, Catholic University of Pernambuco, Recife, Brazil
| | - Marcos Antônio Barbosa de Lima
- Nucleus of Research in Environmental Sciences and Biotechnology, Catholic University of Pernambuco, Recife, Brazil
- Laboratory of Agricultural and Environmental Microbiology, Department of Biology, Federal Rural University of Pernambuco, Recife, Brazil
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6
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Partial Substitution of Conventional Synthetic Surfactant by Biosurfactant Enhances the Stability of micro-droplets of Crude Oil in Surfactant Solution in Flow State and Within Sub-second Period. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Nazar M, Shah MUH, Ahmad A, Yahya WZN, Goto M, Moniruzzaman M. Ionic Liquid and Tween-80 Mixture as an Effective Dispersant for Oil Spills: Toxicity, Biodegradability, and Optimization. ACS OMEGA 2022; 7:15751-15759. [PMID: 35571843 PMCID: PMC9096972 DOI: 10.1021/acsomega.2c00752] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 03/29/2022] [Indexed: 05/07/2023]
Abstract
Chemical dispersants are used extensively for oil spill remediation. Most of these dispersants are composed of a mixture of surfactants and organic solvents, which raises concerns about aquatic toxicity and environmental impact. In this study, the toxicity and biodegradability of an oil spill dispersant composed of the surface-active ionic liquid 1-butyl-3-methylimidazolium lauroyl sarcosinate [Bmim][Lausar] and Tween-80 were investigated. In addition, important environmental factors including salinity, temperature, and wave-mixing energy were optimized to obtain maximum dispersion effectiveness. The acute toxicity against zebrafish (Danio rerio) showed that the developed dispersant was practically non-toxic with a median lethal dose of more than 100 mg L-1 after 96 h. The dispersant also demonstrated outstanding biodegradability of 66% after 28 days. A model was developed using a response surface methodology that efficiently (R 2 = 0.992) related the salinity, temperature, and wave-mixing energy of seawater to dispersion effectiveness. The system was then optimized, and a high dispersion effectiveness of 89.70% was obtained with an experimental error of less than 2%. Our findings suggest that the surface-active ionic liquid and Tween-80 mixture could be a viable alternative to toxic chemical dispersants for oil spill remediation.
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Affiliation(s)
- Masooma Nazar
- Department
of Chemical Engineering, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak, Malaysia
| | - Mansoor Ul Hassan Shah
- Department
of Chemical Engineering, University of Engineering
and Technology, 25120 Peshawar, Pakistan
| | - Aqeel Ahmad
- Department
of Chemical Engineering, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak, Malaysia
| | - Wan Zaireen Nisa Yahya
- Department
of Chemical Engineering, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak, Malaysia
- Center
of Research in Ionic Liquids (CORIL), Universiti
Teknologi PETRONAS, Bandar Seri
Iskandar, 32610 Perak, Malaysia
| | - Masahiro Goto
- Department
of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744,
Moto-oka, 819-0395 Fukuoka, Japan
| | - Muhammad Moniruzzaman
- Department
of Chemical Engineering, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak, Malaysia
- Center
of Research in Ionic Liquids (CORIL), Universiti
Teknologi PETRONAS, Bandar Seri
Iskandar, 32610 Perak, Malaysia
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Mnif I, Bouallegue A, Bouassida M, Ghribi D. Surface properties and heavy metals chelation of lipopeptides biosurfactants produced from date flour by Bacillus subtilis ZNI5: optimized production for application in bioremediation. Bioprocess Biosyst Eng 2021; 45:31-44. [PMID: 34807299 DOI: 10.1007/s00449-021-02635-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 09/03/2021] [Indexed: 11/25/2022]
Abstract
The present study summarizes the valorization of date flour by the production of lipopeptide biosurfactant (BioS) by Bacillus subtilis ZNI5 (MW091416). A Taguchi design permitted the formulation of a medium composed only of 6% date flour and 0.5% yeast extract within 2 days of incubation at 150 rpm with a maximal surface tension (ST) reduction of about 27.8 mN/m. The characterization of the lipopeptide shows a CMC value of about 400 mg/L with a minimal ST of 30 mN/m and an ability to disperse oil to about 80 mm at 800 mg/L. Having reduced phytotoxicity, the ZNI5 BioS and ZNI5 strain were assayed for Copper and Cobalt chelation and biosorption. The improvement of the germination index of radish seeds irrigated by the treated contaminated water showed the great potential application of ZNI5 lipopeptide in the bioremediation of heavy metals.
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Affiliation(s)
- Inès Mnif
- Laboratoire de Biochimie et Génie Enzymatique des Lipases, Ecole Nationale d'Ingénieurs de Sfax, BP W 3038, Sfax, Tunisia.
- Laboratoire d'Amélioration des Plantes et de Valorisation des Agro-Ressources, Ecole Nationale d'Ingénieurs de Sfax, Sfax, Tunisia.
- Faculté des Sciences de Gabes, Université de Gabes, Gabès, Tunisia.
| | - Amir Bouallegue
- Laboratoire d'Amélioration des Plantes et de Valorisation des Agro-Ressources, Ecole Nationale d'Ingénieurs de Sfax, Sfax, Tunisia
- Unité de Service Commun Bioréacteur Couplé à un Ultra-filtre, Ecole Nationale D'Ingénieurs de Sfax, Université de Sfax, Sfax, Tunisia
| | - Mouna Bouassida
- Laboratoire d'Amélioration des Plantes et de Valorisation des Agro-Ressources, Ecole Nationale d'Ingénieurs de Sfax, Sfax, Tunisia
- Unité de Service Commun Bioréacteur Couplé à un Ultra-filtre, Ecole Nationale D'Ingénieurs de Sfax, Université de Sfax, Sfax, Tunisia
| | - Dhouha Ghribi
- Laboratoire d'Amélioration des Plantes et de Valorisation des Agro-Ressources, Ecole Nationale d'Ingénieurs de Sfax, Sfax, Tunisia
- Institut Supérieur de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisia
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Valorization of date juice by the production of lipopeptide biosurfactants by a Bacillus mojavensis BI2 strain: bioprocess optimization by response surface methodology and study of surface activities. Bioprocess Biosyst Eng 2021; 44:2315-2330. [PMID: 34241696 DOI: 10.1007/s00449-021-02606-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 06/24/2021] [Indexed: 10/20/2022]
Abstract
Lipopeptides biosurfactants (BioS) are natural surface-active compounds produced by a variety of microorganisms. They have great interest in environmental, biomedical and agro-industrial fields. However their large-scale application and production is limited by the cost of culture media and the low yield of production. Therefore, the improvement of the production yields and the development of efficient and cost-effective bioprocess became of a great interest. In this aim, we applied the response surface method to optimize an economic BioS production by a newly isolated strain Bacillus mojavensis BI2 on date Juice called "Luegmi" as unique carbon and nitrogen source. Using a Box-Bhenken design, we studied the effect of three independent variables on lipopeptide production; Leugmi concentration, Na2HPO4 and incubation time. The results of this study showed that Leugmi concentration at 25%, Na2HPO4 at 0.1% and incubation time of 24 h were optimal conditions for BioS production, with a maximum Surface Tension (ST) decreasing capacity of 55% corresponding to 27 mN/m and an Oil Dispersing Activity (ODA) of 30 cm2 corresponding to a diameter of 6 cm. Preliminary characterization of the BioS produced on Luegmi by UV-Spectra and Thin Layer Chromatography showed its lipopeptide nature. Physic-chemical characterization of the produced lipopeptide on Leugmi showed its great surface activities and stabilities at different pH, temperature and salts concentration. The results of this study suggested that Leugmi, an agricultural byproducts can be used as a low-cost substrate to enhance the yield of lipopeptide BioS with great surface activities for potential environmental application.
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Reynolds A, Giltrap DM, Chambers PG. Acute growth inhibition & toxicity analysis of nano-polystyrene spheres on Raphidocelis subcapitata. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 207:111153. [PMID: 32896819 DOI: 10.1016/j.ecoenv.2020.111153] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 08/06/2020] [Accepted: 08/10/2020] [Indexed: 06/11/2023]
Abstract
Micro/nano-plastics (MNPs) have been found within many environments and organisms including humans, making them a significant and growing concern. Initial research into the potential detrimental effects these MNPs both from acute and chronic exposure has been ongoing but still requires substantially more data to clarify. This research presents the response of nano-polystyrene (NPS) on Raphidocelis subcapitata, a freshwater alga, under an existing acute toxicity test along with additional analytical techniques to try identifying possible sources of toxicity. R. subcapitata cells were exposed for 72 h to a concentration range of 0-100 mg/l NPS. Growth Inhibition (GI) testing showed the R. subcapitata demonstrated statistically distinct reductions in growth over 72 h at all NPS exposure concentrations while not suffering culture collapse. By the 100 mg/l NPS exposure the R. subcapitata has suffered almost a 33.7% reduction in cell concentration after 72 h compared to control samples. Confocal imaging showed the NPS wasn't permeating into the algal plasma membrane or individual organelles but agglomerated onto the algal cell wall. The agglomeration was irregular but increased in total surface area covered as NPS concentration increases. UV-Vis fluorimetry testing produced a linear response of emission intensities to algae exposed to the 0-100 mg/l range of NPS. However, comparisons of emission intensity values of algae exposed to NPS to emission intensities of pure NPS at identical concentrations showed consistent intensity reduction. This response further indicated NPS agglomerating within the media and onto the alga cells seen from confocal imaging. Finally, Raman spectroscopy on R. subcapitata attempted to distinguish the key 1001 cm-1 peak or other crucial identifier peaks of polystyrene from overall Raman spectra. This was not successful as emissions from algal component (e.g. phenylaniline) completely suppressed the signal region.
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Affiliation(s)
- A Reynolds
- FOCAS Institute, Technological University Dublin, Kevin's Street, Dublin 8, Ireland.
| | - Dr M Giltrap
- School of Food Science and Environmental Health, Technological University Dublin, Cathal Brugha Street, Dublin 1, Ireland.
| | - Prof G Chambers
- School of Physics, Technological University Dublin, Kevin's Street, Dublin 8, Ireland.
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11
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Fenibo EO, Ijoma GN, Selvarajan R, Chikere CB. Microbial Surfactants: The Next Generation Multifunctional Biomolecules for Applications in the Petroleum Industry and Its Associated Environmental Remediation. Microorganisms 2019; 7:E581. [PMID: 31752381 PMCID: PMC6920868 DOI: 10.3390/microorganisms7110581] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 09/24/2019] [Accepted: 09/24/2019] [Indexed: 11/30/2022] Open
Abstract
Surfactants are a broad category of tensio-active biomolecules with multifunctional properties applications in diverse industrial sectors and processes. Surfactants are produced synthetically and biologically. The biologically derived surfactants (biosurfactants) are produced from microorganisms, with Pseudomonas aeruginosa, Bacillus subtilis Candida albicans, and Acinetobacter calcoaceticus as dominant species. Rhamnolipids, sophorolipids, mannosylerithritol lipids, surfactin, and emulsan are well known in terms of their biotechnological applications. Biosurfactants can compete with synthetic surfactants in terms of performance, with established advantages over synthetic ones, including eco-friendliness, biodegradability, low toxicity, and stability over a wide variability of environmental factors. However, at present, synthetic surfactants are a preferred option in different industrial applications because of their availability in commercial quantities, unlike biosurfactants. The usage of synthetic surfactants introduces new species of recalcitrant pollutants into the environment and leads to undesired results when a wrong selection of surfactants is made. Substituting synthetic surfactants with biosurfactants resolves these drawbacks, thus interest has been intensified in biosurfactant applications in a wide range of industries hitherto considered as experimental fields. This review, therefore, intends to offer an overview of diverse applications in which biosurfactants have been found to be useful, with emphases on petroleum biotechnology, environmental remediation, and the agriculture sector. The application of biosurfactants in these settings would lead to industrial growth and environmental sustainability.
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Affiliation(s)
- Emmanuel O. Fenibo
- World Bank Africa Centre of Excellence, Centre for Oilfield Chemical Research, University of Port Harcourt, Port Harcourt 500272, Nigeria
| | - Grace N. Ijoma
- Institute for the Development of Energy for African Sustainability, University of South Africa, Roodepoort 1709, South Africa;
| | - Ramganesh Selvarajan
- Department of Environmental Science, University of South Africa, Florida Campus, Rooderpoort 1709, South Africa
| | - Chioma B. Chikere
- Department of Microbiology, Faculty of Science, University of Port Harcourt, Port Harcourt 500272, Nigeria;
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12
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Liu WQ, Yang SZ, Gang HZ, Mu BZ, Liu JF. Efficient emulsifying properties of monoglycerides synthesized via simple and green route. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1638271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Wan-Qing Liu
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Shi-Zhong Yang
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Hong-Ze Gang
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Bo-Zhong Mu
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology, Shanghai, P.R. China
| | - Jin-Feng Liu
- State Key Laboratory of Bioreactor Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, P.R. China
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