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Naloka K, Kuntaveesuk A, Muangchinda C, Chavanich S, Viyakarn V, Chen B, Pinyakong O. Pseudomonas and Pseudarthrobacter are the key players in synergistic phenanthrene biodegradation at low temperatures. Sci Rep 2024; 14:11976. [PMID: 38796616 PMCID: PMC11127967 DOI: 10.1038/s41598-024-62829-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Accepted: 05/21/2024] [Indexed: 05/28/2024] Open
Abstract
Hydrocarbon contamination, including contamination with polycyclic aromatic hydrocarbons (PAHs), is a major concern in Antarctica due to the toxicity, recalcitrance and persistence of these compounds. Under the Antarctic Treaty, nonindigenous species are not permitted for use in bioremediation at polluted sites in the Antarctic region. In this study, three bacterial consortia (C13, C15, and C23) were isolated from Antarctic soils for phenanthrene degradation. All isolated bacterial consortia demonstrated phenanthrene degradation percentages ranging from 45 to 85% for 50 mg/L phenanthrene at 15 ℃ within 5 days. Furthermore, consortium C13 exhibited efficient phenanthrene degradation potential across a wide range of environmental conditions, including different temperature (4-30 ℃) and water availability (without polyethylene glycol (PEG) 6000 or 30% PEG 6000 (w/v)) conditions. Sequencing analysis of 16S rRNA genes revealed that Pseudomonas and Pseudarthrobacter were the dominant genera in the phenanthrene-degrading consortia. Moreover, six cultivable strains were isolated from these consortia, comprising four strains of Pseudomonas, one strain of Pseudarthrobacter, and one strain of Paeniglutamicibacter. These isolated strains exhibited the ability to degrade 50 mg/L phenanthrene, with degradation percentages ranging from 4 to 22% at 15 ℃ within 15 days. Additionally, the constructed consortia containing Pseudomonas spp. and Pseudarthrobacter sp. exhibited more effective phenanthrene degradation (43-52%) than did the individual strains. These results provide evidence that Pseudomonas and Pseudarthrobacter can be potential candidates for synergistic phenanthrene degradation at low temperatures. Overall, our study offers valuable information for the bioremediation of PAH contamination in Antarctic environments.
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Affiliation(s)
- Kallayanee Naloka
- Center of Excellence in Microbial Technology for Marine Pollution Treatment (MiTMaPT), Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
- Research Program on Remediation Technologies for Petroleum Contamination, Center of Excellence on Hazardous Substance Management (HSM), Bangkok, 10330, Thailand
| | - Aunchisa Kuntaveesuk
- Center of Excellence in Microbial Technology for Marine Pollution Treatment (MiTMaPT), Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Chanokporn Muangchinda
- Center of Excellence in Microbial Technology for Marine Pollution Treatment (MiTMaPT), Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
- International Postgraduate Programs in Hazardous Substance and Environmental Management, Graduate School, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Suchana Chavanich
- Reef Biology Research Group, Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Voranop Viyakarn
- Reef Biology Research Group, Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
- Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Bo Chen
- Polar Biological Science Division, Polar Research Institute of China, Shanghai, China
| | - Onruthai Pinyakong
- Center of Excellence in Microbial Technology for Marine Pollution Treatment (MiTMaPT), Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
- Research Program on Remediation Technologies for Petroleum Contamination, Center of Excellence on Hazardous Substance Management (HSM), Bangkok, 10330, Thailand.
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2
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Nair GR, Kooverjee BB, de Scally S, Cowan DA, Makhalanyane TP. Changes in nutrient availability substantially alter bacteria and extracellular enzymatic activities in Antarctic soils. FEMS Microbiol Ecol 2024; 100:fiae071. [PMID: 38697936 PMCID: PMC11107947 DOI: 10.1093/femsec/fiae071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 03/07/2024] [Accepted: 05/01/2024] [Indexed: 05/05/2024] Open
Abstract
In polar regions, global warming has accelerated the melting of glacial and buried ice, resulting in meltwater run-off and the mobilization of surface nutrients. Yet, the short-term effects of altered nutrient regimes on the diversity and function of soil microbiota in polyextreme environments such as Antarctica, remains poorly understood. We studied these effects by constructing soil microcosms simulating augmented carbon, nitrogen, and moisture. Addition of nitrogen significantly decreased the diversity of Antarctic soil microbial assemblages, compared with other treatments. Other treatments led to a shift in the relative abundances of these microbial assemblages although the distributional patterns were random. Only nitrogen treatment appeared to lead to distinct community structural patterns, with increases in abundance of Proteobacteria (Gammaproteobateria) and a decrease in Verrucomicrobiota (Chlamydiae and Verrucomicrobiae).The effects of extracellular enzyme activities and soil parameters on changes in microbial taxa were also significant following nitrogen addition. Structural equation modeling revealed that nutrient source and extracellular enzyme activities were positive predictors of microbial diversity. Our study highlights the effect of nitrogen addition on Antarctic soil microorganisms, supporting evidence of microbial resilience to nutrient increases. In contrast with studies suggesting that these communities may be resistant to change, Antarctic soil microbiota responded rapidly to augmented nutrient regimes.
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Affiliation(s)
- Girish R Nair
- Department of Microbiology, Faculty of Science, Stellenbosch University, Stellenbosch 7600, South Africa
- Centre for Epidemic Response and Innovation, School for Data Science and Computational Thinking, Stellenbosch University, Stellenbosch 7600, South Africa
| | - Bhaveni B Kooverjee
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Hatfield, Pretoria 0028, South Africa
| | - Storme de Scally
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Hatfield, Pretoria 0028, South Africa
| | - Don A Cowan
- Centre for Microbial Ecology and Genomics, Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Hatfield, Pretoria 0028, South Africa
| | - Thulani P Makhalanyane
- Department of Microbiology, Faculty of Science, Stellenbosch University, Stellenbosch 7600, South Africa
- Centre for Epidemic Response and Innovation, School for Data Science and Computational Thinking, Stellenbosch University, Stellenbosch 7600, South Africa
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3
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Zhang E, Wilkins D, Crane S, Chelliah DS, van Dorst J, Abdullah K, Tribbia DZ, Hince G, Spedding T, Ferrari B. Urea amendment decouples nitrification in hydrocarbon contaminated Antarctic soil. CHEMOSPHERE 2024; 354:141665. [PMID: 38490611 DOI: 10.1016/j.chemosphere.2024.141665] [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: 12/03/2023] [Revised: 03/05/2024] [Accepted: 03/06/2024] [Indexed: 03/17/2024]
Abstract
Hydrocarbon contaminated soils resulting from human activities pose a risk to the natural environment, including in the Arctic and Antarctic. Engineered biopiles constructed at Casey Station, Antarctica, have proven to be an effective strategy for remediating hydrocarbon contaminated soils, with active ex-situ remediation resulting in significant reductions in hydrocarbons, even in the extreme Antarctic climate. However, the use of urea-based fertilisers, whilst providing a nitrogen source for bioremediation, has also altered the natural soil chemistry leading to increases in pH, ammonium and nitrite. Monitoring of the urea amended biopiles identified rising levels of nitrite to be of particular interest, which misaligns with the long term goal of reducing contaminant levels and returning soil communities to a 'healthy' state. Here, we combine amplicon sequencing, microfluidic qPCR on field samples and laboratory soil microcosms to assess the impact of persistent nitrite accumulation (up to 60 months) on nitrifier abundances observed within the Antarctic biopiles. Differential inhibition of ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) Nitrobacter and Nitrospira in the cold, urea treated, alkaline soils (pH 8.1) was associated with extensive nitrite accumulation (76 ± 57 mg N/kg at 60 months). When the ratio of Nitrospira:AOB dropped below ∼1:1, Nitrobacter was completely inhibited or absent from the biopiles, and nitrite accumulated. Laboratory soil microcosms (incubated at 7 °C and 15 °C for 9 weeks) reproduced the pattern of nitrite accumulation in urea fertilized soil at the lower temperature, consistent with our longer-term observations from the Antarctic biopiles, and with other temperature-controlled microcosm studies. Diammonium phosphate amended soil did not exhibit nitrite accumulation, and could be a suitable alternative biostimulant to avoid excessive nitrite build-up.
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Affiliation(s)
- Eden Zhang
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia; Evolution and Ecology Research Centre, UNSW Sydney, 2052, Australia
| | - Daniel Wilkins
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia; Environmental Stewardship Program, Australian Antarctic Division, Department of Climate Change, Energy, the Environment and Water, 203 Channel Highway, Kingston, TAS, 7050, Australia
| | - Sally Crane
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia; Evolution and Ecology Research Centre, UNSW Sydney, 2052, Australia
| | - Devan S Chelliah
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia
| | - Josie van Dorst
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia; Evolution and Ecology Research Centre, UNSW Sydney, 2052, Australia
| | - Kris Abdullah
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia; Evolution and Ecology Research Centre, UNSW Sydney, 2052, Australia
| | - Dana Z Tribbia
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia; Evolution and Ecology Research Centre, UNSW Sydney, 2052, Australia
| | - Greg Hince
- Environmental Stewardship Program, Australian Antarctic Division, Department of Climate Change, Energy, the Environment and Water, 203 Channel Highway, Kingston, TAS, 7050, Australia
| | - Tim Spedding
- Environmental Stewardship Program, Australian Antarctic Division, Department of Climate Change, Energy, the Environment and Water, 203 Channel Highway, Kingston, TAS, 7050, Australia
| | - Belinda Ferrari
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia; Evolution and Ecology Research Centre, UNSW Sydney, 2052, Australia.
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Lim ZS, Wong CY, Ahmad SA, Puasa NA, Phang LY, Shaharuddin NA, Merican F, Convey P, Zulkharnain A, Shaari H, Azmi AA, Kok YY, Gomez-Fuentes C. Harnessing Diesel-Degrading Potential of an Antarctic Microalga from Greenwich Island and Its Physiological Adaptation. BIOLOGY 2023; 12:1142. [PMID: 37627026 PMCID: PMC10452857 DOI: 10.3390/biology12081142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 08/27/2023]
Abstract
Microalgae are well known for their metal sorption capacities, but their potential in the remediation of hydrophobic organic compounds has received little attention in polar regions. We evaluated in the laboratory the ability of an Antarctic microalga to remediate diesel hydrocarbons and also investigated physiological changes consequent upon diesel exposure. Using a polyphasic taxonomic approach, the microalgal isolate, WCY_AQ5_1, originally sampled from Greenwich Island (South Shetland Islands, maritime Antarctica) was identified as Tritostichococcus sp. (OQ225631), a recently erected lineage within the redefined Stichococcus clade. Over a nine-day experimental incubation, 57.6% of diesel (~3.47 g/L) was removed via biosorption and biodegradation, demonstrating the strain's potential for phytoremediation. Fourier transform infrared spectroscopy confirmed the adsorption of oil in accordance with its hydrophobic characteristics. Overall, degradation predominated over sorption of diesel. Chromatographic analysis confirmed that the strain efficiently metabolised medium-chain length n-alkanes (C-7 to C-21), particularly n-heneicosane. Mixotrophic cultivation using diesel as the organic carbon source under a constant light regime altered the car/chl-a ratio and triggered vacuolar activities. A small number of intracellular lipid droplets were observed on the seventh day of cultivation in transmission electron microscopic imaging. This is the first confirmation of diesel remediation ability in an Antarctic green microalga.
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Affiliation(s)
- Zheng Syuen Lim
- School of Health Sciences, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (Z.S.L.); (Y.-Y.K.)
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (N.A.P.); (N.A.S.)
| | - Chiew-Yen Wong
- School of Health Sciences, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (Z.S.L.); (Y.-Y.K.)
- Centre for Environmental and Population Health, Institute for Research, Development and Innovation (IRDI), International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia
| | - Siti Aqlima Ahmad
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (N.A.P.); (N.A.S.)
- Center for Research and Antarctic Environmental Monitoring (CIMAA), Universidad de Magallanes, Avda. Bulnes, Punta Arenas 01855, Chile;
- Laboratory of Bioresource Management, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Material Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Nurul Aini Puasa
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (N.A.P.); (N.A.S.)
| | - Lai Yee Phang
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia;
| | - Noor Azmi Shaharuddin
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (N.A.P.); (N.A.S.)
| | - Faradina Merican
- School of Biological Sciences, Universiti Sains Malaysia, Minden 11800, Pulau Pinang, Malaysia;
| | - Peter Convey
- British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge CB3 0ET, UK;
- Department of Zoology, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
- Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Las Palmeras 3425, Ñuñoa, Santiago 7750000, Chile
| | - Azham Zulkharnain
- Department of Bioscience and Engineering, College of Systems Engineering and Science, Shibaura Institute of Technology, 307 Fukasaku, Minuma-ku, Saitama 337-8570, Japan;
| | - Hasrizal Shaari
- Centre of Research and Field Services, Universiti Malaysia Terengganu, Kuala Nerus 21030, Terengganu, Malaysia;
- Institute of Oceanography and Environment, Universiti Malaysia Terengganu, Kuala Nerus 21030, Terengganu, Malaysia
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Kuala Nerus 21030, Terengganu, Malaysia;
| | - Alyza Azzura Azmi
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Kuala Nerus 21030, Terengganu, Malaysia;
| | - Yih-Yih Kok
- School of Health Sciences, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (Z.S.L.); (Y.-Y.K.)
| | - Claudio Gomez-Fuentes
- Center for Research and Antarctic Environmental Monitoring (CIMAA), Universidad de Magallanes, Avda. Bulnes, Punta Arenas 01855, Chile;
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Abdullah K, Wilkins D, Ferrari BC. Utilization of-Omic technologies in cold climate hydrocarbon bioremediation: a text-mining approach. Front Microbiol 2023; 14:1113102. [PMID: 37396353 PMCID: PMC10313077 DOI: 10.3389/fmicb.2023.1113102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 05/02/2023] [Indexed: 07/04/2023] Open
Abstract
Hydrocarbon spills in cold climates are a prominent and enduring form of anthropogenic contamination. Bioremediation is one of a suite of remediation tools that has emerged as a cost-effective strategy for transforming these contaminants in soil, ideally into less harmful products. However, little is understood about the molecular mechanisms driving these complex, microbially mediated processes. The emergence of -omic technologies has led to a revolution within the sphere of environmental microbiology allowing for the identification and study of so called 'unculturable' organisms. In the last decade, -omic technologies have emerged as a powerful tool in filling this gap in our knowledge on the interactions between these organisms and their environment in vivo. Here, we utilize the text mining software Vosviewer to process meta-data and visualize key trends relating to cold climate bioremediation projects. The results of text mining of the literature revealed a shift over time from optimizing bioremediation experiments on the macro/community level to, in more recent years focusing on individual organisms of interest, interactions within the microbiome and the investigation of novel metabolic degradation pathways. This shift in research focus was made possible in large part by the rise of omics studies allowing research to focus not only what organisms/metabolic pathways are present but those which are functional. However, all is not harmonious, as the development of downstream analytical methods and associated processing tools have outpaced sample preparation methods, especially when dealing with the unique challenges posed when analyzing soil-based samples.
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Affiliation(s)
- Kristopher Abdullah
- Faculty of Science, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Daniel Wilkins
- Environmental Stewardship Program, Australian Antarctic Division, Department of Climate Change, Energy, Environment and Water, Kingston, TAS, Australia
| | - Belinda C. Ferrari
- Faculty of Science, School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
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Yao K, Cai A, Han J, Che R, Hao J, Wang F, Ye M, Jiang X. The characteristics and metabolic potentials of the soil bacterial community of two typical military demolition ranges in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 874:162562. [PMID: 36871728 DOI: 10.1016/j.scitotenv.2023.162562] [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: 01/20/2023] [Revised: 02/25/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
The response mechanism of soil microbiota in military polluted sites can effectively indicate the biotoxicity of ammunition. In this study, two military demolition ranges polluted soils of grenades and bullet were collected. According to high-throughput sequencing, after grenade explosion, the dominant bacteria in Site 1 (S1) are Proteobacteria (97.29 %) and Actinobacteria (1.05 %). The dominant bacterium in Site 2 (S2) is Proteobacteria (32.95 %), followed by Actinobacteria (31.17 %). After the military exercise, the soil bacterial diversity index declined significantly, and the bacterial communities interacted more closely. The indigenous bacteria in S1 were influenced more compared to those in S2. According to the environmental factor analysis, the bacteria composition can easily be influenced by heavy metals and organic pollutants, including Cu, Pb, Cr and Trinitrotoluene (TNT). About 269 metabolic pathways annotated in the Kyoto Encyclopedia of Genes and Genomes (KEGG) database were detected in bacterial communities, including nutrition metabolism (C, 4.09 %; N, 1.14 %; S, 0.82 %), external pollutant metabolism (2.52 %) and heavy metal detoxication (2.12 %), respectively. The explosion of ammunition changes the basic metabolism of indigenous bacteria, and heavy metal stress inhibits the TNT degradation ability of bacterial communities. The pollution degree and community structure influence the metal detoxication strategy at the contaminated sites together. Heavy metal ions in S1 are mainly discharged through membrane transporters, while heavy metal ions in S2 are mainly degraded through lipid metabolism and biosynthesis of secondary metabolites. The results obtained in this study can provide deep insight into the response mechanism of the soil bacterial community in military demolition ranges with composite pollutions of heavy metals and organic substances. CAPSULE: Heavy metal stress changed the composition, interaction and metabolism of indigenous communities in military demolition ranges, especially the TNT degradation process.
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Affiliation(s)
- Keyu Yao
- National Engineering Laboratory of Soil Nutrients Management, Pollution Control and Remediation Technologies, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Anjuan Cai
- Jiangsu Environmental Engineering Technology Co., Ltd, 210019, China
| | - Jin Han
- Jiangsu Environmental Engineering Technology Co., Ltd, 210019, China
| | - Ruijie Che
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, School of Environment, Nanjing Normal University, Nanjing 210023, China
| | - Jiarong Hao
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, School of Environment, Nanjing Normal University, Nanjing 210023, China
| | - Fenghe Wang
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, School of Environment, Nanjing Normal University, Nanjing 210023, China.
| | - Mao Ye
- National Engineering Laboratory of Soil Nutrients Management, Pollution Control and Remediation Technologies, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Xin Jiang
- National Engineering Laboratory of Soil Nutrients Management, Pollution Control and Remediation Technologies, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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Sun J, Wang F, Jia X, Wang X, Xiao X, Dong H. Research progress of bio-slurry remediation technology for organic contaminated soil. RSC Adv 2023; 13:9903-9917. [PMID: 37034448 PMCID: PMC10076817 DOI: 10.1039/d2ra06106f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 03/13/2023] [Indexed: 04/11/2023] Open
Abstract
Bio-slurry remediation technology, as a controllable bioremediation method, has the significant advantage of high remediation efficiency and can effectively solve the problems of high energy consumption and secondary pollution of traditional organic pollution site remediation technology. To further promote the application of this technology in the remediation of organically polluted soil, this paper summarizes the importance and advantages of bio-slurry remediation technology compared with traditional soil remediation technologies (physical, chemical, and biological). It introduces the technical infrastructure and its technological processes. Then, various factors that may affect its remediation performance are discussed. By analyzing the applications of this technology to the remediation of typical organic pollutant-(polycyclic aromatic hydrocarbons(PAHs), polychlorinated biphenyls(PCBs), total petroleum hydrocarbons(TPH), and pesticide) contaminated sites, the following key features of this remediation technology are summarised: (1) the technology has a wide range of applications and can be used in a versatile way in the remediation projects of various types of organic-contaminated soil sites such as in clay, sand, and high organic matter content soil; (2) the technology is highly controllable. Adjusting environmental parameters and operational conditions, such as nutrients, organic carbon sources (bio-stimulation), inoculants (bio-augmentation), water-to-soil ratio, etc., can control the remediation process, thus improving the restoration performance. To sum up, this bio-slurry remediation technology is an efficient, controllable and green soil remediation technology that has broad application prospects.
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Affiliation(s)
- Jing Sun
- Environmental Science and Engineering, Qilu University of Technology Jinan 250353 China
| | - Fujia Wang
- Environmental Science and Engineering, Qilu University of Technology Jinan 250353 China
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
| | - Xiaohan Jia
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
| | - Xiaowei Wang
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
| | - Xinxin Xiao
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
| | - Huaijin Dong
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
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