1
|
Puigserver D, Herrero J, Carmona JM. Mobilization pilot test of PCE sources in the transition zone to aquitards by combining mZVI and biostimulation with lactic acid. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 877:162751. [PMID: 36921871 DOI: 10.1016/j.scitotenv.2023.162751] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 02/05/2023] [Accepted: 03/05/2023] [Indexed: 05/06/2023]
Abstract
The potential toxic and carcinogenic effects of chlorinated solvents in groundwater on human health and aquatic ecosystems require very effective remediation strategies of contaminated groundwater to achieve the low legal cleanup targets required. The transition zones between aquifers and bottom aquitards occur mainly in prograding alluvial fan geological contexts. Hence, they are very frequent from a hydrogeological point of view. The transition zone consists of numerous thin layers of fine to coarse-grained clastic fragments (e.g., medium sands and gravels), which alternate with fine-grained materials (clays and silts). When the transition zones are affected by DNAPL spills, free-phase pools accumulate on the less conductive layers. Owing to the low overall conductivity of this zone, the pools are very recalcitrant. Little field research has been done on transition zone remediation techniques. Injection of iron microparticles has the disadvantage of the limited accessibility of this reagent to reach the entire source of contamination. Biostimulation of indigenous microorganisms in the medium has the disadvantage that few of the microorganisms are capable of complete biodegradation to total mineralization of the parent contaminant and metabolites. A field pilot test was conducted at a site where a transition zone existed in which DNAPL pools of PCE had accumulated. In particular, the interface with the bottom aquitard was where PCE concentrations were the highest. In this pilot test, a combined strategy using ZVI in microparticles and biostimulation with lactate in the form of lactic acid was conducted. Throughout the test it was found that the interdependence of the coupled biotic and abiotic processes generated synergies between these processes. This resulted in a greater degradation of the PCE and its transformation products. With the combination of the two techniques, the mobilization of the contaminant source of PCE was extremely effective.
Collapse
Affiliation(s)
- Diana Puigserver
- Department of Mineralogy, Petrology and Applied Geology. Faculty of Earth Sciences, University of Barcelona (UB), Water Research Institute (IdRA-UB), Serra Húnter Tenure-elegible Lecturer, C/ Martí i Franquès, s/n, E-08028 Barcelona, Spain.
| | - Jofre Herrero
- Department of Mineralogy, Petrology and Applied Geology, Faculty of Earth Sciences, University of Barcelona (UB), Water Research Institute (IdRA-UB), C/ Martí i Franquès, s/n, E-08028 Barcelona, Spain.
| | - José M Carmona
- Department of Mineralogy, Petrology and Applied Geology, Faculty of Earth Sciences, University of Barcelona (UB), Water Research Institute (IdRA-UB), C/ Martí i Franquès, s/n, E-08028 Barcelona, Spain.
| |
Collapse
|
2
|
Naylor D, McClure R, Jansson J. Trends in Microbial Community Composition and Function by Soil Depth. Microorganisms 2022; 10:microorganisms10030540. [PMID: 35336115 PMCID: PMC8954175 DOI: 10.3390/microorganisms10030540] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 02/22/2022] [Accepted: 02/25/2022] [Indexed: 12/18/2022] Open
Abstract
Microbial communities play important roles in soil health, contributing to processes such as the turnover of organic matter and nutrient cycling. As soil edaphic properties such as chemical composition and physical structure change from surface layers to deeper ones, the soil microbiome similarly exhibits substantial variability with depth, with respect to both community composition and functional profiles. However, soil microbiome studies often neglect deeper soils, instead focusing on the top layer of soil. Here, we provide a synthesis on how the soil and its resident microbiome change with depth. We touch upon soil physicochemical properties, microbial diversity, composition, and functional profiles, with a special emphasis on carbon cycling. In doing so, we seek to highlight the importance of incorporating analyses of deeper soils in soil studies.
Collapse
|
3
|
Field Test of In Situ Groundwater Treatment Applying Oxygen Diffusion and Bioaugmentation Methods in an Area with Sustained Total Petroleum Hydrocarbon (TPH) Contaminant Flow. WATER 2022. [DOI: 10.3390/w14020192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Contamination of groundwater by petroleum hydrocarbons is a widespread environmental problem in many regions. Contamination of unsaturated and saturated zones could also pose a significant risk to human health. The main purpose of the study was to assess the efficiency of biodegradation of total petroleum hydrocarbon (TPH) in situ, in an area with loam and sandy loam soils, and to identify features and characteristics related to groundwater treatment in an area with a persistent flow of pollutants. We used methods of biostimulation (oxygen as stimulatory supplement) and bioaugmentation to improve water quality. Oxygen was added to the groundwater by diffusion through silicone tubing. The efficiency of groundwater treatment was determined by detailed monitoring. Implementation of the applied measure resulted in an average reduction in TPH concentration of 73.1% compared with the initial average concentration (4.33 mg/L), and in the local area, TPH content was reduced by 95.5%. The authors hope that this paper will contribute to a better understanding of the topic of groundwater treatment by in situ biodegradation of TPH. Further studies on this topic are particularly needed to provide more data and details on the efficiency of groundwater treatment under adverse geological conditions.
Collapse
|
4
|
Iqbal A, Shang Z, Rehman MLU, Ju M, Rehman MMU, Rafiq MK, Ayub N, Bai Y. Pattern of microbial community composition and functional gene repertoire associated with methane emission from Zoige wetlands, China-A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 694:133675. [PMID: 31756831 DOI: 10.1016/j.scitotenv.2019.133675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 07/23/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
The Hindu-Kush Himalaya region extends over 4 million km2 across the eight countries. Knowingly, the Qinghai-Tibetan Plateau (QTP) is considered the principal altitudinal permafrost constituent on earth and is deemed as the third 'pole'. Among which, the Zoige wetlands are located in the northeastern boundary of QTP, wrapping a total area of 6180 km2 with an average altitude of 3500 m. This entire region is the hotspot for methane emission since the last decade. Given the importance of methane emission, many studies have focused on the effect of environmental fluctuations on the overall methane profile and, more recently on the methanogenic community structure. The current review summarizes recent advancements of the methanogenic community and methane profile and outlines a framework for better understanding of the microbial ecology of the Zoige wetlands, China. Moreover, as microorganisms are indispensable to biogeochemical cycles, especially for methane, they are believed to be the best indicators to identify the condition of wetlands. Hence, we suggest that, underpinning the microbial profile could help understand the status of a wetland.
Collapse
Affiliation(s)
- Awais Iqbal
- School of Life Sciences, State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou 730000, PR China
| | - Zhanhuan Shang
- School of Life Sciences, State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou 730000, PR China.
| | - Mian Laiq Ur Rehman
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China
| | - Meiting Ju
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China
| | - Muhammad Maqsood Ur Rehman
- School of Life Sciences, State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou 730000, PR China
| | - Muhammad Khalid Rafiq
- Rangeland Research Institute, National Agricultural Research Center, Islamabad 44000, Pakistan; UK Biochar Research Centre, School of GeoSciences, University of Edinburgh, Crew Building, King's Building, Edinburgh EH93FF, United Kingdom
| | - Nasir Ayub
- School of Life Sciences, State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou 730000, PR China
| | - Yanfu Bai
- School of Life Sciences, State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou 730000, PR China
| |
Collapse
|
5
|
Uckert K, Chanover NJ, Getty S, Voelz DG, Brinckerhoff WB, McMillan N, Xiao X, Boston PJ, Li X, McAdam A, Glenar DA, Chavez A. The Characterization of Biosignatures in Caves Using an Instrument Suite. ASTROBIOLOGY 2017; 17:1203-1218. [PMID: 29227156 DOI: 10.1089/ast.2016.1568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The search for life and habitable environments on other Solar System bodies is a major motivator for planetary exploration. Due to the difficulty and significance of detecting extant or extinct extraterrestrial life in situ, several independent measurements from multiple instrument techniques will bolster the community's confidence in making any such claim. We demonstrate the detection of subsurface biosignatures using a suite of instrument techniques including IR reflectance spectroscopy, laser-induced breakdown spectroscopy, and scanning electron microscopy/energy dispersive X-ray spectroscopy. We focus our measurements on subterranean calcium carbonate field samples, whose biosignatures are analogous to those that might be expected on some high-interest astrobiology targets. In this work, we discuss the feasibility and advantages of using each of the aforementioned instrument techniques for the in situ search for biosignatures and present results on the autonomous characterization of biosignatures using multivariate statistical analysis techniques. Key Words: Biosignature suites-Caves-Mars-Life detection. Astrobiology 17, 1203-1218.
Collapse
Affiliation(s)
- Kyle Uckert
- 1 Department of Astronomy, New Mexico State University , Las Cruces, New Mexico
| | - Nancy J Chanover
- 1 Department of Astronomy, New Mexico State University , Las Cruces, New Mexico
| | | | - David G Voelz
- 3 Department of Electrical and Computer Engineering, New Mexico State University , Las Cruces, New Mexico
| | | | - Nancy McMillan
- 4 Department of Geological Sciences, New Mexico State University , Las Cruces, New Mexico
| | - Xifeng Xiao
- 3 Department of Electrical and Computer Engineering, New Mexico State University , Las Cruces, New Mexico
| | - Penelope J Boston
- 5 NASA Astrobiology Institute , NASA Ames Research Center, Moffett Field, California
| | - Xiang Li
- 6 University of Maryland , Baltimore County, Baltimore, Maryland
| | - Amy McAdam
- 2 NASA/Goddard Space Flight Center , Greenbelt, Maryland
| | - David A Glenar
- 6 University of Maryland , Baltimore County, Baltimore, Maryland
| | - Arriana Chavez
- 4 Department of Geological Sciences, New Mexico State University , Las Cruces, New Mexico
| |
Collapse
|
6
|
Hu W, Zhang Q, Tian T, Cheng G, An L, Feng H. The microbial diversity, distribution, and ecology of permafrost in China: a review. Extremophiles 2015; 19:693-705. [PMID: 25925876 DOI: 10.1007/s00792-015-0749-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 04/04/2015] [Indexed: 11/29/2022]
Abstract
Permafrost in China mainly located in high-altitude areas. It represents a unique and suitable ecological niche that can be colonized by abundant microbes. Permafrost microbial community varies across geographically separated locations in China, and some lineages are novel and possible endemic. Besides, Chinese permafrost is a reservoir of functional microbial groups involved in key biogeochemical cycling processes. In future, more work is necessary to determine if these phylogenetic groups detected by DNA-based methods are part of the viable microbial community, and their functional roles and how they potentially respond to climate change. This review summaries recent studies describing microbial biodiversity found in permafrost and associated environments in China, and provides a framework for better understanding the microbial ecology of permafrost.
Collapse
Affiliation(s)
- Weigang Hu
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | | | | | | | | | | |
Collapse
|
7
|
|
8
|
Bates CL, Forstner MRJ, Barnes MB, Whiteley M, McLean RJC. HETEROTROPHIC LIMESTONE-ADHERENT BIOFILM ISOLATES FROM THE EDWARDS AQUIFER, TEXAS. SOUTHWEST NAT 2006. [DOI: 10.1894/0038-4909(2006)51[299:hlbift]2.0.co;2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
9
|
Abstract
Environmental conditions which define boundaries for biofilm production could provide useful ecological information for biofilm models. A practical use of defined conditions could be applied to the high-level nuclear waste repository at Yucca Mountain. Data for temperature and humidity conditions indicate that decreases in relative humidity or increased temperature severely affect biofilm formation on three candidate canister metals.
Collapse
Affiliation(s)
- Terry Ann Else
- Health Sciences Department, Community College of Southern Nevada, Las Vegas, Nevada 89146, USA
| | | | | |
Collapse
|
10
|
Subsurface interactions of actinide species and microorganisms: Implications for the bioremediation of actinide-organic mixtures. J Radioanal Nucl Chem 1999. [DOI: 10.1007/bf02347481] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
11
|
|
12
|
Abstract
Bioremediation is a promising technology for responding to marine oil spills. A majority of molecules in crude oils and refined products are biodegradable, and they will eventually leave the environment as they are consumed by microbes. Bioremediation aims to stimulate the rate of this process. Successful bioremediation efforts have so far focused on applying fertilizers to aerobic oiled shorelines to at least partially relieve the nitrogen limitation of biodegradation by indigenous microorganisms. Nevertheless, there seems to be room for improving the process by developing better fertilizers, developing surfactants to stimulate degradation, and perhaps using exogenous bacteria. There also is room to extend the application to oiled marshes and other anaerobic sediments, and perhaps to floating slicks. This review covers our present understanding of hydrocarbon degradation in the marine environment, and discusses field trials and field use of bioremediation as an important adjunct to other tools for responding to marine oil spills.
Collapse
Affiliation(s)
- R C Prince
- Exxon Research and Engineering, Annandale, NJ 08801
| |
Collapse
|
13
|
Arter HE, Hanselmann KW, Bachofen R. Modelling of microbial degradation processes: The behaviour ofmicroorganisms in a waste repository. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01949880] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
14
|
|
15
|
McCabe A. The potential significance of microbial activity in radioactive waste disposal. ACTA ACUST UNITED AC 1990. [DOI: 10.1007/bf01935524] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|