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Raes B, Wang J, Horemans B, Dirckx L, Waldherr S, Kohler HPE, Springael D. The Growth Yield of Aminobacter niigataensis MSH1 on the Micropollutant 2,6-Dichlorobenzamide Decreases Substantially at Trace Substrate Concentrations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:2859-2869. [PMID: 38289638 DOI: 10.1021/acs.est.3c06883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Abstract
2,6-Dichlorobenzamide (BAM) is an omnipresent micropollutant in European groundwaters. Aminobacter niigataensis MSH1 is a prime candidate for biologically treating BAM-contaminated groundwater since this organism is capable of utilizing BAM as a carbon and energy source. However, detailed information on the BAM degradation kinetics by MSH1 at trace concentrations is lacking, while this knowledge is required for predicting and optimizing the degradation process. Contaminating assimilable organic carbon (AOC) in media makes the biodegradation experiment a mixed-substrate assay and hampers exploration of pollutant degradation at trace concentrations. In this study, we examined how the BAM concentration affects MSH1 growth and BAM substrate utilization kinetics in a AOC-restricted background to avoid mixed-substrate conditions. Conventional Monod kinetic models were unable to predict kinetic parameters at low concentrations from kinetics determined at high concentrations. Growth yields on BAM were concentration-dependent and decreased substantially at trace concentrations; i.e., growth of MSH1 diminished until undetectable levels at BAM concentrations below 217 μg-C/L. Nevertheless, BAM degradation continued. Decreasing growth yields at lower BAM concentrations might relate to physiological adaptations to low substrate availability or decreased expression of downstream steps of the BAM catabolic pathway beyond 2,6-dichlorobenzoic acid (2,6-DCBA) that ultimately leads to Krebs cycle intermediates for growth and energy conservation.
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Affiliation(s)
- Bart Raes
- Division of Soil and Water Management, KU Leuven, Heverlee B-3001, Belgium
| | - Jinsong Wang
- Division of Soil and Water Management, KU Leuven, Heverlee B-3001, Belgium
| | - Benjamin Horemans
- Division of Soil and Water Management, KU Leuven, Heverlee B-3001, Belgium
| | - Lode Dirckx
- Division of Soil and Water Management, KU Leuven, Heverlee B-3001, Belgium
| | - Steffen Waldherr
- Chemical Reactor Engineering and Safety (CREaS), KU Leuven, Heverlee B-3001, Belgium
| | - Hans-Peter E Kohler
- Department of Environmental Microbiology, Swiss Federal Institute of Aquatic Science and Technology (Eawag), 8600 Dübendorf, Switzerland
| | - Dirk Springael
- Division of Soil and Water Management, KU Leuven, Heverlee B-3001, Belgium
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2
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Liu Y, Zhao X, Wang X, Ding A, Zhang D. Application of whole-cell bioreporters for ecological risk assessment and bioremediation potential evaluation after a benzene exceedance accident in groundwater in Lanzhou, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167846. [PMID: 37844638 DOI: 10.1016/j.scitotenv.2023.167846] [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: 07/14/2023] [Revised: 10/12/2023] [Accepted: 10/12/2023] [Indexed: 10/18/2023]
Abstract
Oil spill events challenge human health and ecosystem safety, which are priority concerned issues for sustainable development. There is then an increasing demand of tools for ecological risks assessment at contaminated sites. In this study, we introduced two whole-cell bioreporters, ADPWH_alk and ADPWH_recA, to measure the available n-alkanes and the genotoxicities of total petroleum hydrocarbons in soils and groundwater which were contaminated by the Benzene Exceedance Accident in Lanzhou, China. Comparing to traditional chemical analysis methods, the whole-cell bioreporter method could provide risk assessment on cell level within a shorter time and a less cost, which is economical and environment friendly. The highest contents of available alkanes in soil and groundwater were 18,737 mg/kg and 308.4 mg/L, respectively. In addition, the available n-alkanes significantly (p < 0.01) correlated to chemical analysis of total n-alkanes. The highest genotoxicity level was found in soil and groundwater samples with lower TPHs concentration (4338.0 mg/kg and 1.4 mg/L Mitomycin C equivalent), suggesting the significant impacts of geochemical variables and alkane availability on the ecological risks of petroleum contamination. Combining chemical analysis and whole-cell bioreporter results, bioremediation strategies were suggested for groundwater and soils with higher n-alkane availability and lower ecological risks, whereas chemical oxidation were suggested for other contaminated sites. For the first time, we mapped the distribution of available n-alkanes and petroleum toxicities in a large scale soil-groundwater system using whole-cell bioreporters, showing their huge potential for rapid contaminant detection and fast risk assessment.
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Affiliation(s)
- Yueqiao Liu
- Experiment and Practice Innovation Education Center, Beijing Normal University at Zhuhai, Zhuhai 519087, PR China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing Normal University, Beijing 100875, PR China
| | - Xiaohui Zhao
- China Institute of Water Resources and Hydropower Research, Beijing 100038, PR China
| | - Xinzi Wang
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Aizhong Ding
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China.
| | - Dayi Zhang
- College of New Energy and Environment, Jilin University, Changchun 130021, PR China; Key Laboratory of Groundwater Resources and Environment Ministry of Education, Jilin University, Changchun 130021, PR China.
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3
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Liu H, Zhang L, Wang W, Hu H, Ouyang X, Xu P, Tang H. An Intelligent Synthetic Bacterium for Chronological Toxicant Detection, Biodegradation, and Its Subsequent Suicide. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304318. [PMID: 37705081 PMCID: PMC10625131 DOI: 10.1002/advs.202304318] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/24/2023] [Indexed: 09/15/2023]
Abstract
Modules, toolboxes, and synthetic biology systems may be designed to address environmental bioremediation. However, weak and decentralized functional modules require complex control. To address this issue, an integrated system for toxicant detection and biodegradation, and subsequent suicide in chronological order without exogenous inducers is constructed. Salicylic acid, a typical pollutant in industrial wastewater, is selected as an example to demonstrate this design. Biosensors are optimized by regulating the expression of receptors and reporters to get 2-fold sensitivity and 6-fold maximum output. Several stationary phase promoters are compared, and promoter Pfic is chosen to express the degradation enzyme. Two concepts for suicide circuits are developed, with the toxin/antitoxin circuit showing potent lethality. The three modules are coupled in a stepwise manner. Detection and biodegradation, and suicide are sequentially completed with partial attenuation compared to pre-integration, except for biodegradation, being improved by the replacements of ribosome binding site. Finally, a long-term stability test reveals that the engineered strain maintained its function for ten generations. The study provides a novel concept for integrating and controlling functional modules that can accelerate the transition of synthetic biology from conceptual to practical applications.
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Affiliation(s)
- Huan Liu
- State Key Laboratory of Microbial MetabolismJoint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiP. R. China
| | - Lige Zhang
- State Key Laboratory of Microbial MetabolismJoint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiP. R. China
| | - Weiwei Wang
- State Key Laboratory of Microbial MetabolismJoint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiP. R. China
| | - Haiyang Hu
- State Key Laboratory of Microbial MetabolismJoint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiP. R. China
| | - Xingyu Ouyang
- State Key Laboratory of Microbial MetabolismJoint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiP. R. China
| | - Ping Xu
- State Key Laboratory of Microbial MetabolismJoint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiP. R. China
| | - Hongzhi Tang
- State Key Laboratory of Microbial MetabolismJoint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiP. R. China
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Aminian-Dehkordi J, Rahimi S, Golzar-Ahmadi M, Singh A, Lopez J, Ledesma-Amaro R, Mijakovic I. Synthetic biology tools for environmental protection. Biotechnol Adv 2023; 68:108239. [PMID: 37619824 DOI: 10.1016/j.biotechadv.2023.108239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 08/17/2023] [Accepted: 08/20/2023] [Indexed: 08/26/2023]
Abstract
Synthetic biology transforms the way we perceive biological systems. Emerging technologies in this field affect many disciplines of science and engineering. Traditionally, synthetic biology approaches were commonly aimed at developing cost-effective microbial cell factories to produce chemicals from renewable sources. Based on this, the immediate beneficial impact of synthetic biology on the environment came from reducing our oil dependency. However, synthetic biology is starting to play a more direct role in environmental protection. Toxic chemicals released by industries and agriculture endanger the environment, disrupting ecosystem balance and biodiversity loss. This review highlights synthetic biology approaches that can help environmental protection by providing remediation systems capable of sensing and responding to specific pollutants. Remediation strategies based on genetically engineered microbes and plants are discussed. Further, an overview of computational approaches that facilitate the design and application of synthetic biology tools in environmental protection is presented.
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Affiliation(s)
| | - Shadi Rahimi
- Department of Life Sciences, Chalmers University of Technology, Göteborg, Sweden
| | - Mehdi Golzar-Ahmadi
- Norman B. Keevil Institute of Mining Engineering, University of British Columbia, Vancouver, Canada
| | - Amritpal Singh
- Department of Bioengineering, Imperial College London, London, SW72AZ, UK
| | - Javiera Lopez
- Department of Bioengineering, Imperial College London, London, SW72AZ, UK
| | | | - Ivan Mijakovic
- Department of Life Sciences, Chalmers University of Technology, Göteborg, Sweden; Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark.
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5
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Teng T, Huang WE, Li G, Wang X, Song Y, Tang X, Dawa D, Jiang B, Zhang D. Application of magnetic-nanoparticle functionalized whole-cell biosensor array for bioavailability and ecotoxicity estimation at urban contaminated sites. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 896:165292. [PMID: 37414179 DOI: 10.1016/j.scitotenv.2023.165292] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/01/2023] [Accepted: 07/01/2023] [Indexed: 07/08/2023]
Abstract
The bioavailability and ecotoxicity of pollutants are important for urban ecological systems and human health, particularly at contaminated urban sites. Therefore, whole-cell bioreporters are used in many studies to assess the risks of priority chemicals; however, their application is restricted by low throughput for specific compounds and complicated operations for field tests. In this study, an assembly technology for manufacturing Acinetobacter-based biosensor arrays using magnetic nanoparticle functionalization was developed to solve this problem. The bioreporter cells maintained high viability, sensitivity, and specificity in sensing 28 priority chemicals, seven heavy metals, and seven inorganic compounds in a high-throughput manner, and their performance remained acceptable for at least 20 d. We also tested the performance by assessing 22 real environmental soil samples from urban areas in China, and our results showed positive correlations between the biosensor estimation and chemical analysis. Our findings prove the feasibility of the magnetic nanoparticle-functionalized biosensor array to recognize the types and toxicities of multiple contaminants for online environmental monitoring at contaminated sites.
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Affiliation(s)
- Tingting Teng
- Key Laboratory of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun 130021, PR China; College of New Energy and Environment, Jilin University, Changchun 130021, PR China
| | - Wei E Huang
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
| | - Guanghe Li
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Xinzi Wang
- School of Environment, Tsinghua University, Beijing 100084, PR China; Suzhou Yiqing Environmental Technology Co. Ltd., Suzhou 215163, PR China
| | - Yizhi Song
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, PR China
| | - Xiaoyi Tang
- Lancaster Environment Centre, Lancaster University, Lancaster LA1 2YQ, UK
| | - Dunzhu Dawa
- Key Laboratory of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun 130021, PR China; College of New Energy and Environment, Jilin University, Changchun 130021, PR China
| | - Bo Jiang
- School of Energy and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, PR China
| | - Dayi Zhang
- Key Laboratory of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun 130021, PR China; College of New Energy and Environment, Jilin University, Changchun 130021, PR China.
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6
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Ejenavi O, Teng T, Huang W, Wang X, Zhang W, Zhang D. Online detection of alkanes by a biological-phase microextraction and biosensing (BPME-BS) device. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131316. [PMID: 37003003 DOI: 10.1016/j.jhazmat.2023.131316] [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: 02/03/2023] [Revised: 03/23/2023] [Accepted: 03/27/2023] [Indexed: 05/03/2023]
Abstract
Oil spill incidents occur frequently and threaten ecosystems and human health. Solid-phase microextraction allows direct alkane extraction from environmental matrices to improve the limit of detection but is unable to measure alkanes on site. A biological-phase microextraction and biosensing (BPME-BS) device was developed by immobilising an alkane chemotactic Acinetobacter bioreporter ADPWH_alk in agarose gel to achieve online alkane quantification with the aid of a photomultiplier. The BPME-BS device had a high enrichment factor (average 7.07) and a satisfactory limit of detection (0.075 mg/L) for alkanes. The quantification range was 0.1-100 mg/L, comparable to a gas chromatography flame ionisation detector and better than a bioreporter without immobilisation. ADPWH_alk cells in the BPME-BS device maintained good sensitivity under a wide range of environmental conditions, including pH (4.0-9.0), temperature (20-40 °C), and salinity (0.0-3.0%), and its response remained stable within 30 days at 4 °C. In a 7-day continual measurement, the BPME-BS device successfully visualised the dynamic concentration of alkanes, and a 7-day field test successfully captured an oil spill event, helping in source apportionment and on-scene law enforcement. Our work proved that the BPME-BS device is a powerful tool for online alkane measurement, showing substantial potential for fast detection and rapid response to oil spills on site and in situ.
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Affiliation(s)
- Odafe Ejenavi
- Lancaster Environment Centre, Lancaster University, LA1 4YQ, UK
| | - Tingting Teng
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, PR China; College of New Energy and Environment, Jilin University, Changchun 130012, PR China
| | - Wenxin Huang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, PR China; College of New Energy and Environment, Jilin University, Changchun 130012, PR China
| | - Xinzi Wang
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Wenjing Zhang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, PR China; College of New Energy and Environment, Jilin University, Changchun 130012, PR China
| | - Dayi Zhang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, PR China; College of New Energy and Environment, Jilin University, Changchun 130012, PR China.
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7
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Zhang X, Zhu Y, Li B, Tefsen B, Wang Z, Wells M. We need to plan streamlined environmental impact assessment for the future X-Press Pearl disasters. MARINE POLLUTION BULLETIN 2023; 188:114705. [PMID: 36791553 DOI: 10.1016/j.marpolbul.2023.114705] [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: 12/27/2022] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
The X-Press Pearl disaster illustrates the urgent needs for streamlined environmental impact assessment to inform decision making. The environmental contamination caused by the disaster is complex, and the biological impact of different environmental stressors, and at different biological scales, needs to be determined. Traditional methods for analyzing complex environmental stressors are often inefficient and do not reflect the biological impact of pollution. The combination of chemical stressors and biological impacts is the key to environmental impact assessment based on integrated monitoring. Whole-cell bioreporters are tools for rapid, efficient and quantitative detection of the bioavailability, stressor effects, and toxicity of pollutants, i.e., spanning a wide range of applications. Here we propose the view that using whole-cell bioreporter technology to streamline short-term environmental impact assessment for maritime disasters such as the X-Press Pearl is more fit-for-purpose/practical than other approaches in use.
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Affiliation(s)
- Xiaokai Zhang
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Yi Zhu
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Boling Li
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Boris Tefsen
- Department of Molecular Microbiology, Utrecht University, Padualaan 8, CH Utrecht 3584, Netherlands; Natural Sciences, Ronin Institute, Montclair, NJ 07043, USA
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Mona Wells
- Natural Sciences, Ronin Institute, Montclair, NJ 07043, USA; The Meadows Center for Water and the Environment, Texas State University, San Marcos, TX 78666, USA.
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8
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Wu S, Li H, Zhang D, Zhang H. Simultaneous determination of heavy metal concentrations and toxicities by diffusive gradient in thin films containing Acinetobacter whole-cell bioreporters (Bio-DGT). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 320:121050. [PMID: 36632971 DOI: 10.1016/j.envpol.2023.121050] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 12/30/2022] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
Heavy metal contaminations may cause severe toxic impacts to ecological systems and human health. Measurements of metals' bioavailable concentrations and toxicities simultaneously and in-situ in environments can advance the understanding of their hazardous effects. The diffusive gradients in thin-films (DGT) is an in-situ technique can measure metal speciation and labile concentrations, but cannot yet provide the direct toxicity information. The whole-cell bioreporter Acinetobacter baylyi ADPWH_recA was successfully incorporated into the DGT device to develop a novel technique, Bio-DGT, for assessing the toxicity of metals at the same time of measuring their labile concentrations. The bioassay used in Bio-DGT can sense the mixture toxicity from multiple contaminants and the DGT can assist in identifying which toxicants may be causing the toxicity. Cadmium was used as the model metal to test the performance of Bio-DGT in waters and soils. The masses of Cd accumulated in Bio-DGT increased linearly and theoretically with time for 7 days deployment, indicating little influences from bioreporter cells on DGT performance. A positive relationship between bioluminescent signals towards Cd demonstrated the sensitive and active bioreporters' response. The sensitive of Bio-DGT, indicated by Cd concentrations causing the response, is 0.01 mg/L. The stable response from Bio-DGT under various conditions (pH 4-8, ionic strengths 0.01-0.5 M) and 30 days storage time suggest the applicability of the technique in real environments. The deployment of Bio-DGT in contaminated soils demonstrated that Cd toxicity was regulated by labile concentration, showing its potential application for the risk assessment of heavy metal contaminations, and its further feasibility in using Bio-DGT for measuring integration of multiple contaminants' effects and simultaneously determine the main toxicity driver(s).
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Affiliation(s)
- Shuang Wu
- Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK
| | - Hanbing Li
- Department of Environmental Science, Faculty of Environment and Life Science, Beijing University of Technology, Beijing, 100124, China
| | - Dayi Zhang
- College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Hao Zhang
- Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK.
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9
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Sun Y, Ding A, Zhao X, Chang W, Ren L, Zhao Y, Song Z, Hao D, Liu Y, Jin N, Zhang D. Response of soil microbial communities to petroleum hydrocarbons at a multi-contaminated industrial site in Lanzhou, China. CHEMOSPHERE 2022; 306:135559. [PMID: 35787883 DOI: 10.1016/j.chemosphere.2022.135559] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Total petroleum hydrocarbon (TPH) contamination poses threats to ecological systems and human health. Many studies have reported its negative impacts on soil microbes, but limited information is known about microbial change and response to multiple TPH contamination events. In this study, we investigated TPH contamination level, microbial community structure and functional genes at a multi-contaminated industrial site in Lanzhou, where a benzene spill accident caused the drinking water crisis in 2014. TPHs distribution in soils and groundwater indicated multiple TPH contamination events in history, and identified the spill location where high TPH level (6549 mg kg-1) and high ratio of low-molecular-weight TPHs (>80%) were observed. In contrast, TPH level was moderate (349 mg kg-1) and the proportion of low-molecular-weight TPHs was 44% in soils with a long TPH contamination history. After the spill accident, soil bacterial communities became significant diverse (p = 0.047), but the dominant microbes remained the same as Pseudomonadaceae and Comamonadaceae. The abundance of hydrocarbon-degradation related genes increased by 10-1000 folds at the site where the spill accident occurred in multi-contaminated areas and was significantly related to 2-ring PAHs. Such changes of microbial community and hydrocarbon-degradation related genes together indicated the resilience of soil indigenous microbes toward multiple contamination events. Our results proved the significant change of bacterial community and huge shift of hydrocarbon-degradation related genes after the spill accident (multiple contamination events), and provided a deep insight into microbial response at industrial sites with a long period of contamination history.
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Affiliation(s)
- Yujiao Sun
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
| | - Aizhong Ding
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
| | - Xiaohui Zhao
- China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Wonjae Chang
- Department of Civil, Geological, and Environmental Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Liangsuo Ren
- Institute of Geography and Oceangraphy, Nanning Normal University, Nanning, 530100, China
| | - Yinjun Zhao
- Institute of Geography and Oceangraphy, Nanning Normal University, Nanning, 530100, China
| | - Ziyu Song
- BCEG Environmental Remediation LTD, Beijing, 100015, China.
| | - Di Hao
- BCEG Environmental Remediation LTD, Beijing, 100015, China.
| | - Yueqiao Liu
- Experiment and Practice Innovation Education Center, Beijing Normal University at Zhuhai, Zhuhai, 519087, China.
| | - Naifu Jin
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China.
| | - Dayi Zhang
- College of New Energy and Environment, Jilin University, Changchun 130021, China; Key Laboratory of Groundwater Resources and Environment Ministry of Education, Jilin University, Changchun, 130021, China.
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10
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Zhu Y, Elcin E, Jiang M, Li B, Wang H, Zhang X, Wang Z. Use of whole-cell bioreporters to assess bioavailability of contaminants in aquatic systems. Front Chem 2022; 10:1018124. [PMID: 36247665 PMCID: PMC9561917 DOI: 10.3389/fchem.2022.1018124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 09/14/2022] [Indexed: 11/13/2022] Open
Abstract
Water contamination has become increasingly a critical global environmental issue that threatens human and ecosystems’ health. Monitoring and risk assessment of toxic pollutants in water bodies is essential to identifying water pollution treatment needs. Compared with the traditional monitoring approaches, environmental biosensing via whole-cell bioreporters (WCBs) has exhibited excellent capabilities for detecting bioavailability of multiple pollutants by providing a fast, simple, versatile and economical way for environmental risk assessment. The performance of WCBs is determined by its elements of construction, such as host strain, regulatory and reporter genes, as well as experimental conditions. Previously, numerous studies have focused on the design and construction of WCB rather than improving the detection process and commercialization of this technology. For investigators working in the environmental field, WCB can be used to detect pollutants is more important than how they are constructed. This work provides a review of the development of WCBs and a brief introduction to genetic construction strategies and aims to summarize key studies on the application of WCB technology in detection of water contaminants, including organic pollutants and heavy metals. In addition, the current status of commercialization of WCBs is highlighted.
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Affiliation(s)
- Yi Zhu
- School of Environmental and Civil Engineering, Institute of Environmental Processes and Pollution Control, Jiangnan University, Wuxi, China
| | - Evrim Elcin
- Department of Agricultural Biotechnology, Division of Enzyme and Microbial Biotechnology, Faculty of Agriculture, Aydın Adnan Menderes University, Aydın, Turkey
| | - Mengyuan Jiang
- School of Environmental and Civil Engineering, Institute of Environmental Processes and Pollution Control, Jiangnan University, Wuxi, China
| | - Boling Li
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China
| | - Hailong Wang
- Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, China
| | - Xiaokai Zhang
- School of Environmental and Civil Engineering, Institute of Environmental Processes and Pollution Control, Jiangnan University, Wuxi, China
- *Correspondence: Xiaokai Zhang,
| | - Zhenyu Wang
- School of Environmental and Civil Engineering, Institute of Environmental Processes and Pollution Control, Jiangnan University, Wuxi, China
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11
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Zhang J, Pang Q, Wang Q, Qi Q, Wang Q. Modular tuning engineering and versatile applications of genetically encoded biosensors. Crit Rev Biotechnol 2021; 42:1010-1027. [PMID: 34615431 DOI: 10.1080/07388551.2021.1982858] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Genetically encoded biosensors have a diverse range of detectable signals and potential applications in many fields, including metabolism control and high-throughput screening. Their ability to be used in situ with minimal interference to the bioprocess of interest could revolutionize synthetic biology and microbial cell factories. The performance and functions of these biosensors have been extensively studied and have been rapidly improved. We review here current biosensor tuning strategies and attempt to unravel how to obtain ideal biosensor functions through experimental adjustments. Strategies for expanding the biosensor input signals that increases the number of detectable compounds have also been summarized. Finally, different output signals and their practical requirements for biotechnology and biomedical applications and environmental safety concerns have been analyzed. This in-depth review of the responses and regulation mechanisms of genetically encoded biosensors will assist to improve their design and optimization in various application scenarios.
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Affiliation(s)
- Jian Zhang
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, P. R. China
| | - Qingxiao Pang
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, P. R. China
| | - Qi Wang
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, P. R. China
| | - Qingsheng Qi
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, P. R. China.,CAS Key Lab of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, P. R. China
| | - Qian Wang
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, P. R. China.,CAS Key Lab of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, P. R. China
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12
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Islam K, Narjinari H, Kumar A. Polycyclic Aromatic Hydrocarbons Bearing Polyethynyl Bridges: Synthesis, Photophysical Properties, and their Applications. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100134] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Khadimul Islam
- Department of Chemistry Indian Institute of Technology Guwahati 781039 Guwahati Assam India
| | - Himani Narjinari
- Department of Chemistry Indian Institute of Technology Guwahati 781039 Guwahati Assam India
| | - Akshai Kumar
- Department of Chemistry Indian Institute of Technology Guwahati 781039 Guwahati Assam India
- Center for Nanotechnology Indian Institute of Technology Guwahati 781039 Guwahati Assam India
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13
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Ali SA, Mittal D, Kaur G. In-situ monitoring of xenobiotics using genetically engineered whole-cell-based microbial biosensors: recent advances and outlook. World J Microbiol Biotechnol 2021; 37:81. [PMID: 33843020 DOI: 10.1007/s11274-021-03024-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 02/25/2021] [Indexed: 02/07/2023]
Abstract
Industrialisation, directly or indirectly, exposes humans to various xenobiotics. The increased magnitude of chemical pesticides and toxic heavy metals in the environment, as well as their intrusion into the food chain, seriously threatens human health. Therefore, the surveillance of xenobiotics is crucial for social safety and security. Online investigation by traditional methods is not sufficient for the detection and identification of such compounds because of the high costs and their complexity. Advancement in the field of genetic engineering provides a potential opportunity to use genetically modified microorganisms. In this regard, whole-cell-based microbial biosensors (WCBMB) represent an essential tool that couples genetically engineered organisms with an operator/promoter derived from a heavy metal-resistant operon combined with a regulatory protein in the gene circuit. The plasmid controls the expression of the reporter gene, such as gfp, luc, lux and lacZ, to an inducible gene promoter and has been widely applied to assay toxicity and bioavailability. This review summarises the recent trends in the development and application of microbial biosensors and the use of mobile genes for biomedical and environmental safety concerns.
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Affiliation(s)
- Syed Azmal Ali
- Proteomics and Cell Biology Lab, Animal Biotechnology Center, National Dairy Research Institute, Karnal, Haryana, India. .,Proteomics and Cell Biology Lab, Animal Biotechnology Center, ICAR-National Dairy Research Institute, 132001, Karnal, Haryana, India.
| | - Deepti Mittal
- Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India
| | - Gurjeet Kaur
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, 2052, Sydney, NSW, Australia
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14
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Zeng N, Wu Y, Chen W, Huang Q, Cai P. Whole-Cell Microbial Bioreporter for Soil Contaminants Detection. Front Bioeng Biotechnol 2021; 9:622994. [PMID: 33708764 PMCID: PMC7940511 DOI: 10.3389/fbioe.2021.622994] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 01/22/2021] [Indexed: 11/16/2022] Open
Abstract
Anthropogenic activities have released various contaminants into soil that pose a serious threat to the ecosystem and human well-being. Compared to conventional analytical methodologies, microbial cell-based bioreporters are offering a flexible, rapid, and cost-effective strategy to assess the environmental risks. This review aims to summarize the recent progress in the application of bioreporters in soil contamination detection and provide insight into the challenges and current strategies. The biosensing principles and genetic circuit engineering are introduced. Developments of bioreporters to detect and quantify heavy metal and organic contaminants in soil are reviewed. Moreover, future opportunities of whole-cell bioreporters for soil contamination monitoring are discussed.
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Affiliation(s)
- Ni Zeng
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Resources and Environment, Huazhong Agricultural University, Wuhan, China
| | - Yichao Wu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Resources and Environment, Huazhong Agricultural University, Wuhan, China
| | - Wenli Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Qiaoyun Huang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Resources and Environment, Huazhong Agricultural University, Wuhan, China
| | - Peng Cai
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,College of Resources and Environment, Huazhong Agricultural University, Wuhan, China
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15
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Cao Y, Zhang B, Zhu Z, Xin X, Wu H, Chen B. Microfluidic Based Whole-Cell Biosensors for Simultaneously On-Site Monitoring of Multiple Environmental Contaminants. Front Bioeng Biotechnol 2021; 9:622108. [PMID: 33791284 PMCID: PMC8006271 DOI: 10.3389/fbioe.2021.622108] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 02/18/2021] [Indexed: 12/20/2022] Open
Abstract
Monitoring of environmental contaminants serves a vital role in proactive environmental management and pollution control. Research efforts have been centered on the development of robust whole-cell biosensors in recent years. However, data acquisition, multiple contaminants detection and biosafety issues limit the on-site application of such biosensors. Microfluidic system exhibits great potential to face these challenges via coupling biosensors. Here, we prospect a novel microfluidic based whole-cell biosensor (MWCB) for multiplexing monitoring of diverse contaminants, and design strategies to further increase the specificity, sensitivity and accuracy, reduce signal delay and expand shelf life of the proposed MWCB for on-site environmental applications. The development of MWCB demands multidisciplinary cooperation, and the sensing platforms are highly promising for real-world contaminants monitoring.
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Affiliation(s)
- Yiqi Cao
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Baiyu Zhang
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Zhiwen Zhu
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Xiayin Xin
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Hongjing Wu
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Bing Chen
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, Canada
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16
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Su Y, Liu C, Jiang X, Wei W. Different bacterial host-based lux reporter array for fast identification and toxicity indication of multiple metal ions. Anal Bioanal Chem 2020; 412:8127-8134. [PMID: 32918558 DOI: 10.1007/s00216-020-02943-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/15/2020] [Accepted: 09/04/2020] [Indexed: 11/26/2022]
Abstract
Although luminescent bacteria-based bioluminescence inhibition assay has been widely used in the toxicity assessment of environmental pollutants, the response of a luminescent bacterium usually lacks specificity to a target analyte. Recently, some specific analyte inductive promoters were fused to the lux genes for the purpose of selective bioluminescent sensing, and suits of specific promoters were fused to lux genes to compose a bioluminescent array sensor for simultaneous identification of multiple analytes. However, specific promoter-based methods still suffer from drawbacks including limited selectivity, slow responding time, expensive to construct different promoters involved plasmids, and laborious to find new promoters. Herein, we proposed a novel strategy to construct a lux reporter array sensor by directly transforming the natural lux genes in different bacterial hosts without the involvement of any specific promoters. Due to the distinct pathways of signal production, the responding time of the current different bacterial host (DBH)-based lux reporter array has nearly an order of magnitude faster than with specific promoter-based methods. The DBH-based lux reporter array was successfully used for simultaneous identification, quantification, and toxicity/bioactivity assessment of multiple metal ions. Obviously, all the chemical synthetic material-based metal ion sensing methods cannot simultaneously achieve analysis and toxicity evaluation. This approach possessed additional advantages of facile construction, easy operation, high selectivity, fast response, and strong adaptability to other analytes. A different bacterial host-based lux reporter array was established for simultaneous analysis and toxicity assessment of multiple metal ions.
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Affiliation(s)
- Yuchen Su
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China
| | - Chunlan Liu
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China
| | - Xuemei Jiang
- Bioengineering College, Chongqing University, Chongqing, 400044, China
| | - Weili Wei
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China.
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17
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Hicks M, Bachmann TT, Wang B. Synthetic Biology Enables Programmable Cell-Based Biosensors. Chemphyschem 2020; 21:132-144. [PMID: 31585026 PMCID: PMC7004036 DOI: 10.1002/cphc.201900739] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/03/2019] [Indexed: 01/10/2023]
Abstract
Cell-based biosensors offer cheap, portable and simple methods of detecting molecules of interest but have yet to be truly adopted commercially. Issues with their performance and specificity initially slowed the development of cell-based biosensors. With the development of rational approaches to tune response curves, the performance of biosensors has rapidly improved and there are now many biosensors capable of sensing with the required performance. This has stimulated an increased interest in biosensors and their commercial potential. However the reliability, long term stability and biosecurity of these sensors are still barriers to commercial application and public acceptance. Research into overcoming these issues remains active. Here we present the state-of-the-art tools offered by synthetic biology to allow construction of cell-based biosensors with customisable performance to meet the real world requirements in terms of sensitivity and dynamic range and discuss the research progress to overcome the challenges in terms of the sensor stability and biosecurity fears.
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Affiliation(s)
- Maggie Hicks
- School of Biological SciencesUniversity of EdinburghEdinburghUK
- Centre for Synthetic and Systems BiologyUniversity of EdinburghEdinburghUK
| | - Till T. Bachmann
- Infection MedicineEdinburgh Medical School: Biomedical SciencesUniversity of EdinburghEdinburghUK
| | - Baojun Wang
- School of Biological SciencesUniversity of EdinburghEdinburghUK
- Centre for Synthetic and Systems BiologyUniversity of EdinburghEdinburghUK
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18
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Kim H, Jang G, Yoon Y. Specific heavy metal/metalloid sensors: current state and perspectives. Appl Microbiol Biotechnol 2019; 104:907-914. [PMID: 31832713 DOI: 10.1007/s00253-019-10261-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/09/2019] [Accepted: 11/19/2019] [Indexed: 12/12/2022]
Abstract
Heavy metal(loid)s play pivotal roles in regulating physiological and developmental aspects in living organisms depending on their concentration. For example, a trace amount of heavy metal(loid)s is essential for living organisms, but heavy metal(loid)s in high concentrations negatively affect their physiology and development. Because of rapid industrial developments, heavy metal(loid)s have been accumulating in environmental systems, thereby becoming a threat to human health and the earth's ecosystem. Thus, the development of tools to quantify and monitor heavy metal(loid)s in environmental systems has become essential. Typically, risk has been determined through instrument-based analysis, regardless of the shortcomings regarding expense and duration. Nowadays, the need for alternative tools, besides instrumental analysis, to detect heavy metals has prompted the development of new techniques, and many different methods have been reported from various research areas, including new techniques based on electrochemistry and biological systems. Nonetheless, it seems that the gap between laboratory and fieldwork is still greater than it should be when it comes to applying these systems. In this mini-review, we discuss the current status of heavy metals/metalloid detection techniques, with an emphasis on biosensors. Moreover, we discuss the advantages and disadvantages as well as the mechanisms behind newly developed sensors and make suggestions to improve applicability and to develop new objective targeting sensors. Although many different types of metal(loid) sensors are available, we focused on metal sensors based on biological systems. Additionally, we suggest potent approaches to developing new biosensor systems based on current metal sensor mechanisms.
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Affiliation(s)
- Hyojin Kim
- Department of Environmental Health Science, Konkuk University, Seoul, 05029, Republic of Korea
| | - Geupil Jang
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Youngdae Yoon
- Department of Environmental Health Science, Konkuk University, Seoul, 05029, Republic of Korea.
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19
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Cao W, Yin L, Zhang D, Wang Y, Yuan J, Zhu Y, Dou J. Contamination, Sources, and Health Risks Associated with Soil PAHs in Rebuilt Land from a Coking Plant, Beijing, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16040670. [PMID: 30823546 PMCID: PMC6407006 DOI: 10.3390/ijerph16040670] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/13/2019] [Accepted: 02/21/2019] [Indexed: 11/16/2022]
Abstract
This study investigated the polycyclic aromatic hydrocarbon (PAH) pollution in the reconstructed land of an abandoned industrial site: a coking plant in Beijing. To meet the needs of urban development, many factories have had to be relocated from city centers, and abandoned industrial sites often need to be transformed into residential land or urban green space through a series of restoration measures. It is necessary to study the level of residual pollutants and potential risks associated with industrial reconstructed land. The concentration of 16 PAHs in the study area ranged from 314.7 to 1618.3 µg/kg, and the average concentration was still at a medium pollution level; the concentration of PAHs in the original coking workshop had the highest levels (1350.5 µg/kg). The PAHs in the soil were mainly low-ring aromatics, especially naphthalene and phenanthrene. The isomer method and principal component analysis indicated that PAHs in the topsoil were the result of coal and biomass combustion. The seven carcinogenic PAHs were the main contributors to the total toxicity equivalence. The genetic toxicity of benzo[a]pyrene was relatively low, and the results were related to the concentration level. There were potential carcinogenic risks for people of varying ages in this residential area. In total, gender differences were small, and the comprehensive lifetime cancer risk level was still acceptable. For the remaining plots at the study site, the daily intake of PAHs by construction workers was between 0.74⁻2.31 ng/kg bw/day, which requires further evaluation about ignored area occupational exposure to environmental pollutants.
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Affiliation(s)
- Wei Cao
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Liqin Yin
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Dan Zhang
- Beijing Municipal Research Institute of Environmental Protection, National Engineering Research Center of Urban Environmental Pollution Control, Beijing Key Laboratory for risk modeling and remediation of contaminated sites, Beijing 100037, China.
| | - Yingying Wang
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Jing Yuan
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Yi Zhu
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Junfeng Dou
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
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20
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Sheng Y, Zhang X, Zhai X, Zhang F, Li G, Zhang D. A mobile, modular and rapidly-acting treatment system for optimizing and improving the removal of non-aqueous phase liquids (NAPLs) in groundwater. JOURNAL OF HAZARDOUS MATERIALS 2018; 360:639-650. [PMID: 30153629 DOI: 10.1016/j.jhazmat.2018.08.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 08/02/2018] [Accepted: 08/12/2018] [Indexed: 06/08/2023]
Abstract
Non-aqueous phase liquids (NAPLs) in pumped groundwater are highly variable, challenging the selection of above-ground treatment strategies in pump-and-treat system. Adjustable systems with multiple treatment units are urgently required. In the present study, a mobile, modular and rapidly-acting treatment system was developed to treat groundwater contaminated by NAPLs at a chemical industrial site. The system integrated four units of coagulation sedimentation, air flotation, air stripping and chemical oxidation. During a 3-month onsite operation, the composition of groundwater NAPLs had huge fluctuations and different treatment units had unique advantages in eliminating some components. For instance, air stripping exhibited satisfactory removal efficiencies (>80%) for short-chain petroleum hydrocarbons and chloroalkanes, but poor performance for others comparing to other units. A decision-making tool and a central control system were further developed to combine and adjust the four units in proper orders, achieving satisfied removal efficiency (70-90%) for multi-component NAPLs, regardless of composition fluctuation. These findings raise the state-of-the-art modular and rapidly-acting groundwater treatment system to clean up NAPLs contaminated groundwater through pump-and-treat strategy, help in better understanding on the decision and management to improve the treatment performance, and provide guidelines for its implication at other sites contaminated with multi-component NAPLs or undergoing accidental contamination.
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Affiliation(s)
- Yizhi Sheng
- School of Environment, Tsinghua University, Beijing 100084, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Xu Zhang
- School of Environment, Tsinghua University, Beijing 100084, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Xiaobo Zhai
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Fang Zhang
- School of Environment, Tsinghua University, Beijing 100084, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Guanghe Li
- School of Environment, Tsinghua University, Beijing 100084, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China.
| | - Dayi Zhang
- School of Environment, Tsinghua University, Beijing 100084, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China; Research Institute for Environmental Innovation (Suzhou), Tsinghua, Suzhou 215163, China.
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21
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Deb S, Basu S, Singha A, Dutta TK. Development of a 2-Nitrobenzoate-Sensing Bioreporter Based on an Inducible Gene Cluster. Front Microbiol 2018; 9:254. [PMID: 29491862 PMCID: PMC5817917 DOI: 10.3389/fmicb.2018.00254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 01/31/2018] [Indexed: 11/13/2022] Open
Abstract
Based on the sole information of structural genes of the 2-nitrobenzoate (2NBA) utilizing catabolic gene cluster (onbX1X2FCAR1EHJIGDBX3), 2NBA-sensing bioreporters were constructed by incorporating egfp into the onb gene cluster of Cupriavidus sp. strain ST-14. Incorporation of reporter gene in proximal to the hypothesized promoter region in conjunction with the disruption of the gene encoding inducer-metabolizing enzyme was turned out to be advantageous in reporter gene expression at low inducer concentration. The bioreporter strain was capable of expressing EGFP from the very 1st hour of induction and could detect 2NBA at (sub) nanomolar level exhibiting a strict specificity toward 2NBA, displaying no response to EGFP expression from its meta- and para-isomers as well as from a number of structurally related compounds. The present study is a successful demonstration of the development of a 2NBA-sensing bioreporter with respect to ease of construction, inducer specificity, and sensitivity, without prior knowledge of the associated inducer-responsive promoter-regulator elements. The present approach can be used as a model for the development of bioreporters for other environmental pollutants.
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Affiliation(s)
- Satamita Deb
- Department of Microbiology, Bose Institute, Kolkata, India
| | - Soumik Basu
- Department of Microbiology, Bose Institute, Kolkata, India
| | | | - Tapan K Dutta
- Department of Microbiology, Bose Institute, Kolkata, India
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