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Zhu Y, Wang Y, Liu H, Wang H, Xie M, Fang Z, Du S. ABA-metabolizing bacteria and rhamnolipids as valuable allies for enhancing phytoremediation efficiency in heavy metal-contaminated soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167398. [PMID: 37758153 DOI: 10.1016/j.scitotenv.2023.167398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 09/19/2023] [Accepted: 09/24/2023] [Indexed: 10/02/2023]
Abstract
Microbial-assisted phytoremediation has great potential to improve the efficiency of phytoremediation in heavy metal (HM)-contaminated soils. In this study, the synergistic effects of rhamnolipids and the abscisic acid (ABA)-metabolizing bacterium Rhodococcus qingshengii on the phytoremediation efficiency of Indian mustard (Brassica juncea) in HM-contaminated soils were investigated. The Cd, Zn, and Pb contents in plants treated with a combination of rhamnolipids and R. qingshengii were 48.4-77.1 %, 14.6-40.4 %, and 16.1-20.0 % higher, respectively, than in those treated with R. qingshengii alone, and 42.8-59.2 %, 13.1-48.2 %, and 7.3-67.5 % higher, respectively, than in those treated with rhamnolipids alone. In addition, the bioconcentration factors of each metal were improved, and the biomass further increased by 36.6-65.7 % compared to that of single treatments. Pearson's correlation analysis showed that rhamnolipids and R. qingshengii enhanced the accumulation of HMs in B. juncea by activating the available forms of HMs in the soil and regulating the ABA and indole-3-acetic acid in plants, respectively. The structural equation model indicated that R. qingshengii had a larger path coefficient than rhamnolipids in terms of HM content and plant biomass, suggesting that R. qingshengii may have a greater contribution to promoting the extraction of HMs from the soil under synergistic conditions. In conclusion, the combination of rhamnolipids and R. qingshengii has great potential to enhance the phytoremediation efficiency of hyperaccumulating plants in HM-contaminated soils.
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Affiliation(s)
- Yaxin Zhu
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
| | - Yu Wang
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Huijun Liu
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Hua Wang
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Minghui Xie
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Zhiguo Fang
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Shaoting Du
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China.
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Yu Q, Zheng Y, Li D. Permeable reactive composite approaching cathode enhanced Cr removal in soil using the byproduct of electrokinetic technology: emphasized energy utilization efficiency. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:98139-98155. [PMID: 37608168 DOI: 10.1007/s11356-023-28993-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 07/22/2023] [Indexed: 08/24/2023]
Abstract
Cost-effective techniques with significant removal rates and low energy consumption are urgently required for in-situ Cr-contaminated soil remediation to reduce potential environmental toxicity to the ecosystem and human bodies. Electrokinetic technology is a valuable and promising soil remediation technology; however, the acidic and alkaline fronts evolution induced by the electrokinetic byproducts (H+, OH-) has significant hindering characteristics for ion removal. To effectively utilize the byproducts for enhancing Cr elimination, this paper proposed the permeable reactive composite approaching cathode with rhamnolipid-modified biochar as reactive material. Power utilization efficiency (η) was presented to comprehensively evaluate the target species elimination effect, considering removal rate and energy consumption. Results suggested that biosurfactant rhamnolipid stimulated Cr removal in acid and base fronts. Acid front induced rhamnolipid protonation reducing anolyte Cr(VI) to Cr(III), and base front induced rhamnolipid deprotonation complexing with Cr(III) and expediting Cr(VI) dissolution by electrostatic repulsion. Permeable reactive composite approaching cathode induced the maximum removal rate of Cr(VI) and Cr(III) in each section by impelling the alkaline front. Approaching cathode caused increased resistance and energy consumption in the near-anode regions, ultimately decreasing energy utilization efficiency. Optimized moving frequency and applied potential magnitude could adjust power consumption distribution in a single soil layer to obtain better electrokinetic removal performance of contaminates. This work provided essential scientific and practical importance for in-situ electrokinetic remediation of Cr(VI) and Cr(III), considering elimination efficiency and energy consumption in the future.
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Affiliation(s)
- Qiu Yu
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China
- College of Resources and Safety Engineering, Chongqing University, Chongqing, 400044, China
| | - Yi Zheng
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China
- College of Resources and Safety Engineering, Chongqing University, Chongqing, 400044, China
| | - Dongwei Li
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China.
- College of Resources and Safety Engineering, Chongqing University, Chongqing, 400044, China.
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Poirier A, Le Griel P, Perez J, Baccile N. Cation-Induced Fibrillation of Microbial Glycolipid Biosurfactant Probed by Ion-Resolved In Situ SAXS. J Phys Chem B 2022; 126:10528-10542. [PMID: 36475558 DOI: 10.1021/acs.jpcb.2c03739] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Biological amphiphiles are molecules with a rich phase behavior. Micellar, vesicular, and even fibrillar phases can be found for the same molecule by applying a change in pH or by selecting the appropriate metal ion. The rich phase behavior paves the way toward a broad class of soft materials, from carriers to hydrogels. The present work contributes to understanding the fibrillation of a microbial glycolipid, glucolipid G-C18:1, produced by Starmerella bombicola ΔugtB1 and characterized by a micellar phase at alkaline pH and a vesicular phase at acidic pH. Fibrillation and prompt hydrogelation is triggered by adding either alkaline earth, Ca2+, or transition metal, Ag+, Fe2+, Al3+, ions to a G-C18:1 micellar solution. A specifically designed apparatus coupled to a synchrotron SAXS beamline allows the performing of simultaneous cation- and pH-resolved in situ monitoring of the morphological evolution from spheroidal micelles to crystalline fibers, when Ca2+ is employed, or to wormlike aggregates, when Fe2+ or Al3+ solutions are employed. The fast reactivity of Ag+ and the crystallinity of Ca2+-induced fibers suggest that fibrillation is driven by direct metal-ligand interactions, while the shape transition from spheroidal to elongated micelles with Fe2+ or Al3+ rather suggest charge screening between the lipid and the hydroxylated cation species.
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Affiliation(s)
- Alexandre Poirier
- Sorbonne Université, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR CNRS 7574, 4 place Jussieu, ParisF-75005, France
| | - Patrick Le Griel
- Sorbonne Université, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR CNRS 7574, 4 place Jussieu, ParisF-75005, France
| | - Javier Perez
- SWING Beamline, Synchrotron SOLEIL, L'Orme des Merisiers, 91190Saint-Aubin, France
| | - Niki Baccile
- Sorbonne Université, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR CNRS 7574, 4 place Jussieu, ParisF-75005, France
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Poirier A, Ozkaya K, Gredziak J, Talbot D, Baccile N. Heavy metal removal from water using the metallogelation properties of a new glycolipid biosurfactant. J SURFACTANTS DETERG 2022. [DOI: 10.1002/jsde.12629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexandre Poirier
- Laboratoire de Chimie de la Matière Condensée de Paris, LCMCP Sorbonne Université, CNRS Paris France
| | - Korin Ozkaya
- Laboratoire de Chimie de la Matière Condensée de Paris, LCMCP Sorbonne Université, CNRS Paris France
| | - Julie Gredziak
- Laboratoire de Chimie de la Matière Condensée de Paris, LCMCP Sorbonne Université, CNRS Paris France
- Laboratoire de Physicochimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX Sorbonne Université, CNRS Paris France
| | - Delphine Talbot
- Laboratoire de Physicochimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX Sorbonne Université, CNRS Paris France
| | - Niki Baccile
- Laboratoire de Chimie de la Matière Condensée de Paris, LCMCP Sorbonne Université, CNRS Paris France
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Khoshdast H, Gholami A, Hassanzadeh A, Niedoba T, Surowiak A. Advanced Simulation of Removing Chromium from a Synthetic Wastewater by Rhamnolipidic Bioflotation Using Hybrid Neural Networks with Metaheuristic Algorithms. MATERIALS (BASEL, SWITZERLAND) 2021; 14:2880. [PMID: 34072118 PMCID: PMC8199015 DOI: 10.3390/ma14112880] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/22/2021] [Accepted: 05/25/2021] [Indexed: 12/01/2022]
Abstract
This work aims at presenting an advanced simulation approach for a novel rhamnolipidic-based bioflotation process to remove chromium from wastewater. For this purpose, the significance of key influential operating variables including initial solution pH (2, 4, 6, 8, 10 and 12), rhamnolipid to chromium ratio (RL:Cr = 0.010, 0.025, 0.050, 0.075 and 0.100), reductant (Fe) to chromium ratio (Fe:Cr of 0.5, 1.0, 1.5, 2.0, 2.5, 3.0), and air flowrate (50, 100, 150, 200 and 250 mL/min) were investigated and evaluated using Analysis of Variance (ANOVA) method. The RL as both collector and frother was produced using a pure strain of Pseudomonas aeruginosa MA01 under specific conditions. The bioflotation tests were carried out within a bubbly regimed column cell with the dimensions of 60 × 5.70 × 0.1 cm. Four optimization techniques based on Artificial Neural Network (ANN) including Cuckoo, genetic, firefly and biogeography-based optimization algorithms were applied to 113 experiments to identify the optimum values of studied factors. The ANOVA results revealed that all four variables influence the bioflotation performance through a non-linear trend. Their influences, except for aeration rate, were found statistically significant (p-value < 0.05), and all parameters followed the normal distribution according to Anderson-Darlin (AD) criterion. Maximum chromium removal of about 98% was achieved at pH of 6, rhamnolipid to chromium ratio of 0.05, air flowrate of 150 mL/min, and Fe to Cr ratio of 1.0. Flotation kinetics study indicated that chromium bioflotation follows the first-order kinetic model with a rate of 0.023 sec-1. According to the statistical assessment of the model accuracy, the firefly algorithm (FFA) with a structure of 4-9-1 yielded the highest level of reliability with the mean squared, root mean squared, percentage errors and correlation coefficient values of test-data of 0.0038, 0.0617, 3.08% and 96.92%, respectively. These values were evidences of the consistency of the well-structured ANN method to simulate the process.
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Affiliation(s)
- Hamid Khoshdast
- Department of Mining Engineering, Higher Education Complex of Zarand, Zarand 7761156391, Iran
| | - Alireza Gholami
- Department of Mineral Processing, Tarbiat Modares University, Tehran 14115-111, Iran;
| | - Ahmad Hassanzadeh
- Independent Scholar, Am Apostelhof 7A, 50226 Frechen, Germany;
- Department of Geoscience and Petroleum, Faculty of Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Tomasz Niedoba
- Department of Environmental Engineering, Faculty of Mining and Geoengineering, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland;
| | - Agnieszka Surowiak
- Department of Environmental Engineering, Faculty of Mining and Geoengineering, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland;
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