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Skinner J, Delgado AG, Hyman M, Chu MYJ. Implementation of in situ aerobic cometabolism for groundwater treatment: State of the knowledge and important factors for field operation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 925:171667. [PMID: 38485017 DOI: 10.1016/j.scitotenv.2024.171667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 03/04/2024] [Accepted: 03/10/2024] [Indexed: 03/23/2024]
Abstract
In situ aerobic cometabolism of groundwater contaminants has been demonstrated to be a valuable bioremediation technology to treat many legacy and emerging contaminants in dilute plumes. Several well-designed and documented field studies have shown that this technology can concurrently treat multiple contaminants and reach very low cleanup goals. Fundamentally different from metabolism-based biodegradation of contaminants, microorganisms that cometabolically degrade contaminants do not obtain sufficient carbon and energy from the degradation process to support their growth and require an exogenous growth supporting primary substrate. Successful applications of aerobic cometabolic treatment therefore require special considerations beyond conventional in situ bioremediation, such as competitive inhibition between growth-supporting primary substrate(s) and contaminant non-growth substrates, toxic effects resulting from contaminant degradation, and differences in microbial population dynamics exhibited by biostimulated indigenous consortia versus bioaugmentation cultures. This article first provides a general review of microbiological factors that are likely to affect the rate of aerobic cometabolic biodegradation. We subsequently review fourteen well documented field-scale aerobic cometabolic bioremediation studies and summarize the underlying microbiological factors that may affect the performance observed in these field studies. The combination of microbiological and engineering principles gained from field testing leads to insights and recommendations on planning, design, and operation of an in situ aerobic cometabolic treatment system. With a vision of more aerobic cometabolic treatments being considered to tackle large, dilute plumes, we present several novel topics and future research directions that can potentially enhance technology development and foster success in implementing this technology for environmental restoration.
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Affiliation(s)
- Justin Skinner
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85281, USA; School of Sustainable Engineering and the Built Environment, Arizona State University, 660 S College Ave, Tempe, AZ 85281, USA; Engineering Research Center for Bio-mediated and Bio-inspired Geotechnics (CBBG), Arizona State University, 650 E Tyler Mall, Tempe, AZ 85281, USA; Andrews Engineering, Inc., 3300 Ginger Creek Drive, Springfield, IL 62711, USA
| | - Anca G Delgado
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85281, USA; School of Sustainable Engineering and the Built Environment, Arizona State University, 660 S College Ave, Tempe, AZ 85281, USA; Engineering Research Center for Bio-mediated and Bio-inspired Geotechnics (CBBG), Arizona State University, 650 E Tyler Mall, Tempe, AZ 85281, USA
| | - Michael Hyman
- Department of Plant and Microbial Biology, North Carolina State University, Thomas Hall 4545, 112 Derieux Place, Raleigh, NC 27607, USA
| | - Min-Ying Jacob Chu
- Haley & Aldrich Inc., 400 E Van Buren St, Ste 545, Phoenix, AZ 85004, USA.
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2
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Astuti MP, Taylor WS, Lewis GD, Padhye LP. Surface-modified activated carbon for N-nitrosodimethylamine removal in the continuous flow biological activated carbon columns. JOURNAL OF HAZARDOUS MATERIALS 2023; 455:131518. [PMID: 37172385 DOI: 10.1016/j.jhazmat.2023.131518] [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: 02/11/2023] [Revised: 04/08/2023] [Accepted: 04/25/2023] [Indexed: 05/14/2023]
Abstract
The carcinogenic nitrogenous disinfection by-product, N-nitrosodimethylamine (NDMA), is challenging to adsorb due to its high polarity and solubility. Our previous research demonstrated that the adsorptive removal of NDMA can be improved using surface-modified activated carbon (AC800). The current study evaluated the efficacy of AC800 in removing NDMA in a continuous-flow column over 75 days, using both granular activated carbon (GAC) and biologically activated carbon (BAC) columns. The AC800 GAC column demonstrated extended breakthrough and exhaustion times of 10 days and 22 days, respectively, compared to the conventional GAC column at 4 days and 10.5 days. The surface modification effect persisted for 25 days before the removal trends became indistinguishable. The AC800 BAC column outperformed the conventional BAC column with a longer breakthrough time of 11.3 days compared to 7.4 days. BAC columns consistently showed greater NDMA removal, emphasizing the role of biodegradation in NDMA removal on carbon. The higher NDMA removal in the inoculated columns was attributed to increased microbial diversity and the dominance of six specific genera, Methylobacterium, Phyllobacterium, Curvibacter, Acidovorax, Variovorax, and Rhodoferax. This study provides new insights into using modified activated carbon as GAC and BAC media in a real-world continuous-flow setup.
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Affiliation(s)
- Maryani P Astuti
- Department of Civil and Environmental Engineering, University of Auckland, Auckland, New Zealand; Environmental Engineering Study Program, Faculty of Engineering, President University, Bekasi, Indonesia
| | - William S Taylor
- Institute of Environmental Science and Research (ESR), Christchurch, New Zealand
| | - Gillian D Lewis
- School of Biological Science, University of Auckland, Auckland, New Zealand
| | - Lokesh P Padhye
- Department of Civil and Environmental Engineering, University of Auckland, Auckland, New Zealand.
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3
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Piras F, Nakhla G, Murgolo S, De Ceglie C, Mascolo G, Bell K, Jeanne T, Mele G, Santoro D. Optimal integration of vacuum UV with granular biofiltration for advanced wastewater treatment: Impact of process sequence on CECs removal and microbial ecology. WATER RESEARCH 2022; 220:118638. [PMID: 35640512 DOI: 10.1016/j.watres.2022.118638] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/03/2022] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
This study explored process synergies attainable by integrating a vacuum ultraviolet-based advanced oxidation process with biofiltration. A comparison using granular activated carbon or granular zeolite as filtration media were examined in context of advanced wastewater treatment for potable reuse. Six biofiltration columns, three with granular activated carbon and three with granular zeolite, were operated in parallel and batch-fed daily with nitrified secondary effluent. After achieving a pseudo-steady state through the filter columns, vacuum ultraviolet treatment was applied as pre-treatment or as post-treatment, at two different applied energies (i.e., VUV-E1=1 kWh/m3 and VUV-E10=10 kWh/m3). Once granular activated carbon had transitioned to biologically activated carbon, as determined based on soluble chemical oxygen demand removal, adsorption was still observed as the main mechanism for contaminants of emerging concern and nitrate removal. Vacuum ultraviolet pre-treatment markedly improved contaminants of emerging concern removal through the integrated system, achieving 40% at VUV-E1 and 90% at VUV-E10. When applied as post-treatment to zeolite column effluents, VUV-E1 and VUV-E10 further increased contaminants of emerging concern removal by 20% and 90%, respectively. In the zeolite system, vacuum ultraviolet pre-treatment also increased soluble chemical oxygen demand removal efficiency, indicating that higher energy vacuum ultraviolet increased biodegradability. Total prokaryotes were two-fold more abundant in biologically activated carbon than in zeolite, with vacuum ultraviolet pretreatment markedly affecting microbial diversity, both in terms of richness and composition. Media type only marginally affected microbial richness in the biofilters but showed a marked impact on structural composition. No clear relationship between compositional structure and depth was observed.
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Affiliation(s)
- F Piras
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce 73100, Italy
| | - G Nakhla
- Chemical and Biochemical Engineering Department, University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - S Murgolo
- Water Research Institute, National Research Council (IRSA - CNR), via F. de Blasio 5, Bari 70132, Italy
| | - C De Ceglie
- Water Research Institute, National Research Council (IRSA - CNR), via F. de Blasio 5, Bari 70132, Italy
| | - G Mascolo
- Water Research Institute, National Research Council (IRSA - CNR), via F. de Blasio 5, Bari 70132, Italy
| | - K Bell
- Brown & Caldwell, 220 Athens Way #500, Nashville, TN 37228, USA
| | - T Jeanne
- Institut de recherche et de développement en agroenvironnement (IRDA), 2700 rue Einstein, Quebec City, QC G1P 3W8, Canada
| | - G Mele
- Department of Engineering for Innovation, University of Salento, Via Monteroni, Lecce 73100, Italy
| | - D Santoro
- Chemical and Biochemical Engineering Department, University of Western Ontario, London, Ontario N6A 5B9, Canada.
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4
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Guarin TC, Pagilla KR. Microbial community in biofilters for water reuse applications: A critical review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145655. [PMID: 33940748 DOI: 10.1016/j.scitotenv.2021.145655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 01/18/2021] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
The combination of ozonation (O3) and biofiltration processes has become practical and desirable in advanced water reclamation for water reuse applications. However, the role of microbial community and its characteristics (source, abundance, composition, viability, structure) on treatment performance has not received the same attention in water reclamation biofilters as in other applications, such as in drinking water biofilters. Microbial community characterization of biofilters used in water reuse applications will add evidence to better understand the potential microorganisms, consequent risks, and mechanisms that will populate drinking water sources and ultimately influence public health and the environment. This critical review provides insights into O3-biofiltration as a treatment barrier with a focus on development, structure, and composition of the microbial community characteristics involved in the process. The effect of microorganism seeding by the influent before and after the biofilter and ozone oxidation effects are explored to capture the microbial ecology interactions and environmental factors affecting the media ecosystem. The findings of reviewed studies concurred in identifying Proteobacteria as the most dominant phylum. However, Proteobacteria and other phyla relative abundance differ substantially depending upon environmental factors (e.g., pH, temperature, nutrients availability, among others) gradients. In general, we found significant gaps to relate and explain the biodegradation performance and metabolic processes within the biofilter, and hence deserve future attention. We highlighted and identified key challenges and future research ideas to assure O3-biofiltration reliability as a promising barrier in advanced water treatment applications.
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Affiliation(s)
- Tatiana C Guarin
- Department of Civil and Environmental Engineering, University of Nevada, Reno, Reno, NV 89557-0258, USA
| | - Krishna R Pagilla
- Department of Civil and Environmental Engineering, University of Nevada, Reno, Reno, NV 89557-0258, USA.
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Miao Y, Heintz MB, Bell CH, Johnson NW, Polasko AL, Favero D, Mahendra S. Profiling microbial community structures and functions in bioremediation strategies for treating 1,4-dioxane-contaminated groundwater. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124457. [PMID: 33189472 DOI: 10.1016/j.jhazmat.2020.124457] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 09/28/2020] [Accepted: 10/30/2020] [Indexed: 06/11/2023]
Abstract
Microbial community compositions and functional profiles were analyzed in microcosms established using aquifer materials from a former automobile factory site, where 1,4-dioxane was identified as the primary contaminant of concern. Propane or oxygen biostimulation resulted in limited 1,4-dioxane degradation, which was markedly enhanced with the addition of nutrients, resulting in abundant Mycobacterium and Methyloversatilis taxa and high expressions of propane monooxygenase gene, prmA. In bioaugmented treatments, Pseudonocardia dioxanivorans CB1190 or Rhodococcus ruber ENV425 strains dominated immediately after augmentation and degraded 1,4-dioxane rapidly which was consistent with increased representation of xenobiotic and lipid metabolism-related functions. Although the bioaugmented microbes decreased due to insufficient growth substrates and microbial competition, they did continue to degrade 1,4-dioxane, presumably by indigenous propanotrophic and heterotrophic bacteria, inducing similar community structures across bioaugmentation conditions. In various treatments, functional redundancy acted as buffer capacity to ensure a stable microbiome, drove the restoration of the structure and microbial functions to original levels, and induced the decoupling between basic metabolic functions and taxonomy. The results of this study provided valuable information for design and decision-making for ex-situ bioreactors and in-situ bioremediation applications. A metagenomics-based understanding of the treatment process will enable efficient and accurate adjustments when encountering unexpected issues in bioremediation.
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Affiliation(s)
- Yu Miao
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States
| | - Monica B Heintz
- Arcadis North America, Highlands Ranch, CO 80129, United States
| | | | - Nicholas W Johnson
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States
| | - Alexandra LaPat Polasko
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States
| | - David Favero
- Revitalizing Auto Communities Environmental Response (RACER) Trust, Detroit, MI 48226, United States
| | - Shaily Mahendra
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States.
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6
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Hou Y, Liu M, Tan X, Hou S, Yang P. Study on COD and nitrogen removal efficiency of domestic sewage by hybrid carrier biofilm reactor. RSC Adv 2021; 11:27322-27332. [PMID: 35480673 PMCID: PMC9037812 DOI: 10.1039/d1ra03286k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 07/23/2021] [Indexed: 11/21/2022] Open
Abstract
A moving bed biofilm reactor (MBBR) is a kind of commonly used biological sewage treatment process. A carrier, the core of MBBR, could directly affect the treatment efficiency of MBBR. In this experiment, a hybrid carrier composed of an MBBR carrier and fluidized bed porous carrier was innovatively utilized to treat low-concentration simulated domestic sewage through an MBBR reactor to investigate the effects of different hydraulic retention times (HRT) and different carrier dose ratios on the reactor performance. The results indicated that when the volume ratio of the carrier dosage was 5% : 20% when the reactor HRT was 5 h, the removal rates of ammonia nitrogen, total nitrogen (TN) and chemical oxygen demand (CODCr) were optimal, which were 96.5%, 60.9% and 91.5%, respectively. The ammonia nitrogen, total nitrogen and CODCr concentrations of the effluent were 1.04 mg L−1, 12.20 mg L−1 and 29.02 mg L−1, respectively. Furthermore, the total biomass concentration in the hybrid carrier biofilm reactor (HCBR) was 3790.35 mg L−1, which also reached the highest value. As the experiment progressed, the concentrations of protein, polysaccharide and soluble microbial products (SMP) were reduced to 7.68 mg L−1, 11.10 mg L−1 and 18.08 mg L−1, respectively. This was basically consistent with the results of the three-dimensional fluorescence spectrum. The results showed that the combined-carrier biofilm reactor could reduce the volumetric filling rate, improving the removal capability of organic matter and the denitrification efficiency. This study provided technical support for the composite carrier biofilm wastewater treatment technology, and also had a good prospect of application. A combined-carrier biofilm reactor could reduce the volumetric filling rate, improving the removal capability of organic matter and the denitrification efficiency.![]()
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Affiliation(s)
- Yuqiu Hou
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Mei Liu
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Xiao Tan
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Siyu Hou
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Ping Yang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
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7
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Metabolism of N-nitrosodimethylamine, methylation of macromolecules, and development of hepatic fibrosis in rodent models. J Mol Med (Berl) 2020; 98:1203-1213. [PMID: 32666246 DOI: 10.1007/s00109-020-01950-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/04/2020] [Accepted: 07/09/2020] [Indexed: 12/15/2022]
Abstract
Hepatic fibrosis and cirrhosis are chronic diseases affecting liver and a major health problem throughout the world. The hallmark of fibrosis and cirrhosis is inordinate synthesis and deposition of fibril forming collagens in the extracellular matrix of the liver leading to nodule formation and loss of normal architecture. Hepatic stellate cells play a crucial role in the pathogenesis and progression of liver fibrosis through secretion of several potent fibrogenic factors that trigger hepatocytes, portal fibrocytes, and bone marrow-derived fibroblasts to synthesize and deposit several connective tissue proteins, especially collagens between hepatocytes and space of Disse. Regulation of various events involved in the activation and transformation of hepatic stellate cells seems to be an appropriate strategy for the arrest of hepatic fibrosis and liver cirrhosis. In order to unravel the molecular mechanisms involved in the pathogenesis and progression of hepatic fibrosis, to determine proper and potent targets to arrest fibrosis, and to discover powerful therapeutic agents, a quick and reproducible animal model of hepatic fibrosis and liver cirrhosis that display all decompensating features of human condition is required. This review thoroughly evaluates the biochemical, histological, and pathological features of N-nitrosodimethylamine-induced model of liver injury, hepatic fibrosis, and early cirrhosis in rodents.
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8
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Sundaram V, Pagilla K, Guarin T, Li L, Marfil-Vega R, Bukhari Z. Extended field investigations of ozone-biofiltration advanced water treatment for potable reuse. WATER RESEARCH 2020; 172:115513. [PMID: 32006773 DOI: 10.1016/j.watres.2020.115513] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 12/01/2019] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
Recovering and reusing treated wastewater effluent is a sustainable and cost-effective practice for addressing global water sustainability. To date, most potable reuse advanced water treatment (AWT) solutions are based on reverse osmosis (RO), which generates a continuous reject stream of concentrated brine waste. Ozone-biofiltration based solutions have been investigated as a potential alternative for RO. However, implementation of ozone-biofiltration for potable reuse projects around the world has been limited. The goal of this study was to conduct an extended field investigation of ozone-biofiltration treatment to address regulatory, design, and operational hurdles that may hinder implementation in water-short areas. For 16 months, two parallel biological activated carbon (BAC) filters were operated at empty bed contact times (EBCTs) of 10 min and 20 min treating up to 60,000 and 30,000 bed volumes (BVs), respectively, of sand filtered effluent from a municipal wastewater treatment process. BAC 1 (EBCT = 10 min) and BAC 2 (EBCT = 20 min) used Calgon Filtrasorb 400 granular activated carbon (GAC) as filter media, with equal bed depths of 0.8 m. Increasing the specific ozone dose from 0.9 to 2.0 provided a muted response with respect to oxidation of contaminants of emerging concern (CECs) that are resistive to ozonation. N-Nitrosodimethylamine (NDMA) was generated during ozonation, with the average concentration of NDMA in ozonated effluent being 40.4 ng/L. In BAC 1 (EBCT = 10 min), NDMA was fully removed during the first month of study (<2000 BVs), partially removed between 2000 and 20,000 BVs, and completely removed when monitored between 57,000 and 62,000 BVs. These trends clearly reveal time-dependent interactions between carbon-based (e.g., adsorption) and non-carbon-based (e.g., biodegradation) removal mechanisms. In BAC 2 (EBCT = 20 min), almost all CECs, excluding NDMA, were removed consistently throughout the study (through ∼30,000 BVs). This indicates a somewhat different interaction between carbon-based and non-carbon-based removal in the more lightly loaded BAC 2, compared to BAC 1. After 482 days of operation, BAC 1 (EBCT = 10 min) produced effluent with lower NDMA concentration (<2 ng/L) than BAC 2 (10 ng/L), confirming prior evidence of cometabolic NDMA biodegradation pathways operable in more heavily loaded BACs. These findings emphasize the need for extended field testing (50,000 BVs or greater). BAC 1 removed TOC in effluent until it plateaued at around 6 mg/L after 60,000 BVs, whereas BAC 2 effluent plateaued at around 4 mg/L. Under plateau conditions, BAC 1 and BAC 2 with sand filter pretreatment and ozonation appear to have a gross TOC removal potential of around 0.2-0.3 kg of TOC removed per day per cubic meter of carbon media (kg/d/m3). A comparative analysis of findings from this study and results from a past ozone-BAC study in the Reno area (termed BAC 3 operated downstream of membrane filter with an EBCT of 30 min) shows that higher TOC removal was observed in BAC with shorter EBCT and upstream sand filter compared to BAC with longer EBCT and upstream membrane filter. The present study addresses the regulatory and financial concerns associated with ozone-BAC performance in potable reuse applications. Improved comprehension of ozone-BAC performance, coupled with its reduced capital and operations and maintenance (O&M) costs compared to RO, may accelerate the full-scale implementation of ozone-BAC treatment as a sustainable solution for the rapidly emerging potable reuse market.
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Affiliation(s)
- Vijay Sundaram
- Department of Civil and Environmental Engineering, University of Nevada, 1664 N Virginia St, Reno, NV, 89557-0258, USA; Stantec Consulting Services Inc., 3875 Atherton Road, Rocklin, CA, 95765, USA
| | - Krishna Pagilla
- Department of Civil and Environmental Engineering, University of Nevada, 1664 N Virginia St, Reno, NV, 89557-0258, USA.
| | - Tatiana Guarin
- Department of Civil and Environmental Engineering, University of Nevada, 1664 N Virginia St, Reno, NV, 89557-0258, USA
| | - Lin Li
- Department of Civil and Environmental Engineering, University of Nevada, 1664 N Virginia St, Reno, NV, 89557-0258, USA
| | | | - Zia Bukhari
- American Water, 1 Water Street, Camden, NJ, 08102, USA
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9
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Hatzinger PB, Lippincott DR. Field demonstration of N-Nitrosodimethylamine (NDMA) treatment in groundwater using propane biosparging. WATER RESEARCH 2019; 164:114923. [PMID: 31400594 DOI: 10.1016/j.watres.2019.114923] [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: 05/14/2019] [Revised: 07/11/2019] [Accepted: 07/27/2019] [Indexed: 06/10/2023]
Abstract
N-Nitrosodimethylamine (NDMA) is found in groundwater and drinking water from industrial, agricultural, water treatment, and military/aerospace sources, and it must often be treated to part-per-trillion (ng/L) concentrations. The most effective remedial technology for NDMA in groundwater is pump-and-treat with ultraviolet irradiation (UV), but this approach is expensive because it requires ex situ infrastructure and high energy input. The objective of this project was to evaluate an in situ biological treatment approach for NDMA. Previous laboratory studies have revealed that propane-oxidizing bacteria are capable of biodegrading NDMA from μg/L to low ng/L concentrations (Fournier et al., 2009; Webster et al., 2013). During this field study, air and propane gas were sparged into an NDMA-contaminated aquifer for more than 1 year. Groundwater samples were collected throughout the study from a series of monitoring wells within, downgradient, and sidegradient of the zone of influence of the biosparge system. Over the course of the study, NDMA concentrations declined by 99.7% to >99.9% in the four monitoring wells within the zone of influence of the biosparge system, reaching low ng/L concentrations whereas the control well declined by only 14%. Pseudo first-order degradation rate constants for NDMA in system monitoring wells ranged from ∼0.019 day -1 to 0.037 day -1 equating to half-lives ranging from 19 to 36 days. Native propanotrophs increased by more than one order of magnitude in the propane-impacted wells but not in the control well. The field data show for the first time that propane biosparging can be an effective in situ approach to reduce the concentrations of NDMA in a groundwater to ng/L concentrations.
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Affiliation(s)
- Paul B Hatzinger
- Biotechnology Development and Applications Group, Aptim Federal Services, Lawrenceville, NJ, United States.
| | - David R Lippincott
- Biotechnology Development and Applications Group, Aptim Federal Services, Lawrenceville, NJ, United States
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10
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Li Y, Xu H, He C, Shen Z, Chen W, Gao L, Lin C, Lin T, Lu C, Shi Q, Luo J, Wang W. Transformation and fate of dissolved organic nitrogen in drinking water supply system: A full scale case study from Yixing, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 673:435-444. [PMID: 30991333 DOI: 10.1016/j.scitotenv.2019.03.309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/19/2019] [Accepted: 03/20/2019] [Indexed: 06/09/2023]
Abstract
The transformation of dissolved organic nitrogen (DON) in the drinking water treatment plants could be closely associated with nitrogenous disinfection by-product (N-DBP) formation. In this study, we have assessed the molecular transformation of DON and its impact on N-DBP formation in a full scale drinking water treatment plant. Based on the result of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis, DON compounds with low molecular weight (<1 kDa) were classified as CHON, CHON2 and CHON3 according to the number of nitrogen atoms. Via the analytical window of van Krevelen diagrams, we found that the molecular structural features of CHON, CHON2 and CHON3 were not altered before the chlorination process. In detail, the CHON2 and CHON3 compositions were concentrated on the regions assigned to a lignin-structure while CHON compositions were also distributed in other compounds including proteins, carbohydrates and tannin. Furthermore, CHON formation was more difficult to be removed before the V-filter process. For N-DBP, chlorine-containing DON (Cl-DON) composition was likely to be removed through flocculation and sedimentation processes, whereas N-nitrosamine compounds were removed in V-filter and biological activated carbon filter processes. The health risks of aromatic structure N-nitrosamines due to the pre-chlorination of the raw water should be further studied.
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Affiliation(s)
- Yang Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1 Xikang Road, Nanjing 210098, China
| | - Hang Xu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1 Xikang Road, Nanjing 210098, China.
| | - Chen He
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Zhen Shen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1 Xikang Road, Nanjing 210098, China
| | - Wei Chen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1 Xikang Road, Nanjing 210098, China
| | - Li Gao
- Future Water Strategy Group, South East Water, 101 Wells Street, Frankston, Melbourne, Victoria 3199, Australia
| | - Chenshuo Lin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1 Xikang Road, Nanjing 210098, China
| | - Tao Lin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No. 1 Xikang Road, Nanjing 210098, China
| | - Chunhui Lu
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China
| | - Quan Shi
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Jian Luo
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355, USA
| | - Wei Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
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11
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Kuyukina MS, Ivshina IB. Bioremediation of Contaminated Environments Using Rhodococcus. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/978-3-030-11461-9_9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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George J, Tsuchishima M, Tsutsumi M. Molecular mechanisms in the pathogenesis of N-nitrosodimethylamine induced hepatic fibrosis. Cell Death Dis 2019; 10:18. [PMID: 30622238 PMCID: PMC6325159 DOI: 10.1038/s41419-018-1272-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 12/03/2018] [Accepted: 12/06/2018] [Indexed: 12/13/2022]
Abstract
Hepatic fibrosis is marked by excessive synthesis and deposition of connective tissue proteins, especially interstitial collagens in the extracellular matrix of the liver. It is a result of an abnormal wound healing in response to chronic liver injury from various causes such as ethanol, viruses, toxins, drugs, or cholestasis. The chronic stimuli involved in the initiation of fibrosis leads to oxidative stress and generation of reactive oxygen species that serve as mediators of molecular events involved in the pathogenesis of hepatic fibrosis. These processes lead to cellular injury and initiate inflammatory responses releasing a variety of cytokines and growth factors that trigger activation and transformation of resting hepatic stellate cells into myofibroblast like cells, which in turn start excessive synthesis of connective tissue proteins, especially collagens. Uncontrolled and extensive fibrosis results in distortion of lobular architecture of the liver leading to nodular formation and cirrhosis. The perpetual injury and regeneration process could also results in genomic aberrations and mutations that lead to the development of hepatocellular carcinoma. This review covers most aspects of the molecular mechanisms involved in the pathogenesis of hepatic fibrosis with special emphasize on N-Nitrosodimethylamine (NDMA; Dimethylnitorsmaine, DMN) as the inducing agent.
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Affiliation(s)
- Joseph George
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY, 10029, USA.
- Department of Hepatology, Kanazawa Medical University, Uchinada, Ishikawa, 920-0293, Japan.
| | - Mutsumi Tsuchishima
- Department of Hepatology, Kanazawa Medical University, Uchinada, Ishikawa, 920-0293, Japan
| | - Mikihiro Tsutsumi
- Department of Hepatology, Kanazawa Medical University, Uchinada, Ishikawa, 920-0293, Japan
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Tan L, Li T, Zhou J, Chen H, Jiang F. Liquid-phase hydrogenation of N-nitrosodimethylamine over Pd-Ni supported on CeO2-TiO2: The role of oxygen vacancies. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Sun Y, Angelotti B, Brooks M, Dowbiggin B, Evans PJ, Devins B, Wang ZW. A pilot-scale investigation of disinfection by-product precursors and trace organic removal mechanisms in ozone-biologically activated carbon treatment for potable reuse. CHEMOSPHERE 2018; 210:539-549. [PMID: 30029146 DOI: 10.1016/j.chemosphere.2018.06.162] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
Although granular activated carbon (GAC) has been broadly applied in ozone-biologically activated carbon filtration (O3/BAC) systems for potable reuse of municipal wastewater, the mechanisms of various pollutant removal remain largely unknown as the regenerated GAC develops microbial populations resulting in biofiltration but loses significant adsorption capacity as it becomes spent GAC. Therefore, pilot-scale parallel performance comparisons of spent and regenerated GAC, along with a range of pre-oxidant ozone doses, were used to shed light on the mechanisms responsible for the removal of various types of treatment byproduct precursors and trace organic compounds. It was confirmed from this pilot-study that ozone alone can effectively degrade chlorinated trihalomethane (THM) and haloacetic acid (HAA) precursors, chloramine-reactive N-nitrosodimethylamine (NDMA) precursors, and 29 PPCPs. In contrast, biodegradation by microbial population on spent or regenerated GAC can remove NDMA and 22 PPCPs, while the adsorption by regenerated GAC can remove chlorinated THM and HAA precursors, PFAS, flame retardants, and 27 PPCPs. The results of this pilot study are intended to provide those interested in potable reuse with an example of the simultaneous removal capabilities and mechanisms that can be anticipated for treating a complex mixture of organics present in real municipal wastewater effluent.
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Affiliation(s)
- Yewei Sun
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA, USA
| | - Bob Angelotti
- Upper Occoquan Service Authority, Centreville, VA, USA.
| | - Matt Brooks
- Upper Occoquan Service Authority, Centreville, VA, USA
| | | | | | | | - Zhi-Wu Wang
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA, USA.
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15
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Hatzinger PB, Begley JF, Lippincott DR, Bodour A, Forbes R. In situ bioremediation of 1,2-dibromoethane (EDB) in groundwater to part-per-trillion concentrations using cometabolism. JOURNAL OF CONTAMINANT HYDROLOGY 2018; 218:120-129. [PMID: 30293921 DOI: 10.1016/j.jconhyd.2018.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/20/2018] [Accepted: 09/23/2018] [Indexed: 06/08/2023]
Abstract
1,2-Dibromoethane (ethylene dibromide; EDB) is a probable human carcinogen that was historically added to leaded gasoline as a scavenger to prevent the build-up of lead oxide deposits in engines. Studies indicate that EDB is present at thousands of past fuel spill sites above its stringent EPA Maximum Contaminant Level (MCL) of 0.05 μg/L. There are currently no proven in situ options to enhance EDB degradation in groundwater to meet this requirement. Based on successful laboratory studies showing that ethane can be used as a primary substrate to stimulate the aerobic, cometabolic biodegradation of EDB to <0.015 μg/L (Hatzinger et al., 2015), a groundwater recirculation system was installed at the FS-12 EDB plume on Joint Base Cape Cod (JBCC), MA to facilitate in situ treatment. Groundwater was taken from an existing extraction well, amended with ethane, oxygen, and inorganic nutrients and then recharged into the aquifer upgradient of the extraction well creating an in situ reactive zone. The concentrations of EDB, ethane, oxygen, and anions in groundwater were measured with time in a series of nested monitoring wells installed between the extraction and injection well. EDB concentrations in the six monitoring wells that were hydraulically well-connected to the pumping system declined from ~ 0.3 μg/L (the average concentration in the recirculation cell after 3 months of operation without amendment addition) to <0.02 μg/L during the 4-month amendment period, meeting both the federal MCL and the more stringent Massachusetts MCL (0.02 μg/L). The data indicate that cometabolic treatment is a promising in situ technology for EDB, and that low regulatory levels can be achieved with this biological approach.
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Affiliation(s)
- Paul B Hatzinger
- Biotechnology Development and Applications Group, Aptim Federal Services, Lawrenceville, NJ, United States.
| | - James F Begley
- MT Environmental Restoration, Duxbury, MA, United States
| | - David R Lippincott
- Biotechnology Development and Applications Group, Aptim Federal Services, Lawrenceville, NJ, United States
| | - Adria Bodour
- Kirtland Air Force Base, Albuquerque, NM, United States
| | - Rose Forbes
- Air Force Civil Engineer Center, Joint Base Cape Cod, MA, United States
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