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Gearhart N, Pagilla K. Indicator and pathogenic virus removal in bench scale soil aquifer treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 945:173997. [PMID: 38879034 DOI: 10.1016/j.scitotenv.2024.173997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/29/2024] [Accepted: 06/12/2024] [Indexed: 06/27/2024]
Abstract
The demonstration of enteric virus removal for indirect potable reuse of advanced purified water is necessary to ensure safe water reclamation practices. This study evaluated the efficacy of soil treatment in reducing concentrations of Pepper Mild Mottle Virus (PMMoV), Hepatitis A (HAV), and Norovirus (NoV) gene markers through bench scale unsaturated soil columns. Three different infiltration rates were evaluated to determine their impact on viral gene marker removal. The concentrations of viral markers in the column influent and effluent samples were measured through RNA extraction and then RT-qPCR, and the log reduction values (LRVs) were calculated to quantify the effectiveness of removal across the columns. The LRVs achieved for PMMoV were 2.80 ± 0.36, 2.91 ± 0.48, and 2.72 ± 0.32 for infiltration rates of 4.9 mm/h, 9.4 mm/h, and 14.0 mm/h, respectively. A one-way ANOVA indicated no statistically significant differences in LRVs among the various infiltration rates (p-value = 0.329). All samples measured for HAV were below the detection limit both in the influent and effluent of the soil columns. While NoV GI and GII markers were measurable in the soil column influent, they were removed to below the detection limit in the effluent. The use of half the Limit-of-Detection (LoD) for effluent values enabled the estimation of log removals, which were calculated as 1.42 ± 0.07, 1.64 ± 0.29, and 1.74 ± 0.18 for NoV GI and 1.14 ± 0.19, 1.58 ± 0.21, and 1.87 ± 0.41 for NoV GII at infiltration rates of 4.9 mm/h, 9.4 mm/h, and 14.0 mm/h. This highlights the efficacy of soil treatment in reducing virus gene marker concentrations at various infiltration rates, and that spreading basins employed for reclaimed water recharge to ground water aquifers are an effective method for reducing the presence of viral contaminants in indirect potable reuse systems.
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Affiliation(s)
- Nicole Gearhart
- Department of Civil and Environmental Engineering, University of Nevada, Reno, Reno, NV 89557, USA
| | - Krishna Pagilla
- Department of Civil and Environmental Engineering, University of Nevada, Reno, Reno, NV 89557, USA.
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2
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Monleon AJC, Gill LW. Pepper mild mottle virus as an effective tool in microbial source tracking for deficient domestic on-site water treatment systems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 939:173229. [PMID: 38763202 DOI: 10.1016/j.scitotenv.2024.173229] [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: 11/30/2023] [Revised: 05/09/2024] [Accepted: 05/12/2024] [Indexed: 05/21/2024]
Abstract
Pollution from domestic on-site wastewater treatment systems (OWTS) is a significant contaminant pressure in many rural catchments. However, due to their design, and dispersed proliferation, it is difficult to assess their impact. Water testing methodologies employ bacterial culturing methods and chemical analysis which may lose resolution and/or specificity being confounded by diffuse agricultural sources within a rural environment. In this study, we successfully assessed the applicability of Pepper Mild Mottle Virus (PMMoV) as a human faecal source tracker for deficient on-site wastewater treatment systems. The transport of PMMoV was first studied in the effluent of a 30 cm deep soil column which was dosed for 510 days with primary influent from a conventional septic system. The removal of PMMoV through the 30 cm deep soil column was quantified with a 5-day seeding trial employing primary influent mixed with PMMoV sourced from Tabasco pepper product ®. The trial was then carried out at field scale with the seeding solution dosed into an operational percolation trench receiving septic tank effluent which had been instrumented for porewater sampling. Samples were taken at depths of 10 cm, 30 cm, and 50 cm across the length of the trench at distances of 1 m, 7.5 m, and 17.5 m from the inlet of the trench. PMMoV was detected on all days of the trial, with a peak concentration of 1 × 106 found at the rear of the trench on day 2 of the seeding trial. Finally, to assess the effectiveness of PPMoV as a microbial source tracking tool from a water receptor perspective, three rural catchments with high densities of OWTSs were sampled and analysed for hourly variations in biological parameters which included total coliforms, Escherichia coli, PMMoV, and chemical parameters total organic carbon, total nitrogen, and total carbon. PMMoV was detected in all river samples over a 24-hour period, thereby indicating its suitability as a tracer of human wastewater effluent in such environments with multiple diffuse sources.
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Affiliation(s)
- Alejandro Javier Criado Monleon
- Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, The University of Dublin, College Green, Dublin 2, Ireland.
| | - Laurence W Gill
- Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, The University of Dublin, College Green, Dublin 2, Ireland
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Lobos AE, Brandt AM, Gallard-Góngora JF, Korde R, Brodrick E, Harwood VJ. Persistence of sewage-associated genetic markers in advanced and conventional treated recycled water: implications for microbial source tracking in surface waters. mBio 2024; 15:e0065524. [PMID: 38864636 PMCID: PMC11253620 DOI: 10.1128/mbio.00655-24] [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: 05/01/2024] [Accepted: 05/14/2024] [Indexed: 06/13/2024] Open
Abstract
Sewage contamination of environmental waters is increasingly assessed by measuring DNA from sewage-associated microorganisms in microbial source tracking (MST) approaches. However, DNA can persist through wastewater treatment and reach surface waters when treated sewage/recycled water is discharged, which may falsely indicate pollution from untreated sewage. Recycled water discharged from an advanced wastewater treatment (AWT) facility into a Florida stream elevated the sewage-associated HF183 marker 1,000-fold, with a minimal increase in cultured Escherichia coli. The persistence of sewage-associated microorganisms was compared by qPCR in untreated sewage and recycled water from conventional wastewater treatment (CWT) and AWT facilities. E. coli (EC23S857) and sewage-associated markers HF183, H8, and viral crAssphage CPQ_056 were always detected in untreated sewage (6.5-8.7 log10 GC/100 mL). Multivariate analysis found a significantly greater reduction of microbial variables via AWT vs CWT. Bacterial markers decayed ~4-5 log10 through CWT, but CPQ_056 was ~100-fold more persistent. In AWT facilities, the log10 reduction of all variables was ~5. In recycled water, bacterial marker concentrations were significantly correlated (P ≤ 0.0136; tau ≥ 0.44); however, CPQ_056 was not correlated with any marker, suggesting varying drivers of decay. Concentrations of cultured E. coli carrying the H8 marker (EcH8) in untreated sewage were 5.24-6.02 log10 CFU/100 mL, while no E. coli was isolated from recycled water. HF183 and culturable EcH8 were also correlated in contaminated surface waters (odds ratio β1 = 1.701). Culturable EcH8 has a strong potential to differentiate positive MST marker signals arising from treated (e.g., recycled water) and untreated sewage discharged into environmental waters. IMPORTANCE Genes in sewage-associated microorganisms are widely accepted indicators of sewage pollution in environmental waters. However, DNA persists through wastewater treatment and can reach surface waters when recycled water is discharged, potentially causing false-positive indications of sewage contamination. Previous studies have found that bacterial and viral sewage-associated genes persist through wastewater treatment; however, these studies did not compare different facilities or identify a solution to distinguish sewage from recycled water. In this study, we demonstrated the persistence of bacterial marker genes and the greater persistence of a viral marker gene (CPQ_056 of crAssphage) through varying wastewater treatment facilities. We also aim to provide a tool to confirm sewage contamination in surface waters with recycled water inputs. This work showed that the level of wastewater treatment affects the removal of microorganisms, particularly viruses, and expands our ability to identify sewage in surface waters.
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Affiliation(s)
- Aldo E. Lobos
- Department of Integrative Biology, University of South Florida, Tampa, Florida, USA
| | - Amanda M. Brandt
- Department of Integrative Biology, University of South Florida, Tampa, Florida, USA
| | - Javier F. Gallard-Góngora
- Department of Earth, Marine, and Environmental Sciences, Institute of Marine Science, University of North Carolina at Chapel Hill, Morehead City, North Carolina, USA
| | - Ruchi Korde
- Department of Integrative Biology, University of South Florida, Tampa, Florida, USA
| | - Eleanor Brodrick
- Department of Integrative Biology, University of South Florida, Tampa, Florida, USA
| | - Valerie J. Harwood
- Department of Integrative Biology, University of South Florida, Tampa, Florida, USA
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Schmitz BW, Polanco JA, Chen H, Manaktala A, Gu X, Goh SG, Gin KYH. Virus surrogates throughout a full-scale advanced water reuse system. WATER RESEARCH 2024; 256:121556. [PMID: 38604066 DOI: 10.1016/j.watres.2024.121556] [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: 01/19/2024] [Revised: 03/25/2024] [Accepted: 03/29/2024] [Indexed: 04/13/2024]
Abstract
Water reuse as an alternative water supply is increasing throughout the world due to water stress and scarcity; however, there are no standard practices for monitoring virus pathogens in such systems. This study aimed to identify suitable surrogates for virus fate, transport, and removal throughout a water reuse scheme. Various microbial targets (11 viruses, two phage, and three bacteria) were monitored using molecular and culture methods across all treatment stages in a wastewater reclamation facility and advanced water treatment facility. Criteria were established for identifying suitable surrogates, which included reliable detection, observable fate and transport, calculable log-reduction values (LRVs), correlations with other targets, and various morphological types. In total, five viruses (PMMoV, AiV, GII NoV, AdV, FRNA GII) met these stringent criteria and were suggested as potential virus surrogates. These surrogates enabled successful comparison of assigned versus actual LRVs throughout a water reuse scheme. Results suggest that virus pathogens are effectively removed throughout water reuse treatment and the suggested surrogates can be utilized for monitoring treatment performance and ensuring public health safety. This study provides a framework that water utilities across the world can reference for establishing virus monitoring practices.
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Affiliation(s)
- Bradley W Schmitz
- Department of Civil and Environmental Engineering, National University of Singapore, Block E1A, #07-03, No. 1 Engineering Drive 2 117576, Singapore; Current affiliation: Loudoun Water, 44865 Loudoun Water Way, Ashburn, VA 20147, USA.
| | - Julio A Polanco
- Orange County Water District (OCWD), Department of Research and Development, 18700 Ward St., Fountain Valley, CA 92708, USA
| | - Hongjie Chen
- Department of Civil and Environmental Engineering, National University of Singapore, Block E1A, #07-03, No. 1 Engineering Drive 2 117576, Singapore
| | - Avnika Manaktala
- Department of Civil and Environmental Engineering, National University of Singapore, Block E1A, #07-03, No. 1 Engineering Drive 2 117576, Singapore
| | - Xiaoqiong Gu
- Department of Civil and Environmental Engineering, National University of Singapore, Block E1A, #07-03, No. 1 Engineering Drive 2 117576, Singapore
| | - Shin Giek Goh
- Department of Civil and Environmental Engineering, National University of Singapore, Block E1A, #07-03, No. 1 Engineering Drive 2 117576, Singapore
| | - Karina Yew-Hoong Gin
- Department of Civil and Environmental Engineering, National University of Singapore, Block E1A, #07-03, No. 1 Engineering Drive 2 117576, Singapore
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Remesh AT, Viswanathan R. CrAss-Like Phages: From Discovery in Human Fecal Metagenome to Application as a Microbial Source Tracking Marker. FOOD AND ENVIRONMENTAL VIROLOGY 2024; 16:121-135. [PMID: 38413544 DOI: 10.1007/s12560-024-09584-5] [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: 06/08/2023] [Accepted: 01/24/2024] [Indexed: 02/29/2024]
Abstract
CrAss-like phages are a diverse group of bacteriophages genetically similar to the prototypical crAssphage (p-crAssphage), which was discovered in the human gut microbiome through a metagenomics approach. It was identified as a ubiquitous and highly abundant bacteriophage group in the gut microbiome. Initial co-occurrence analysis postulated Bacteroides spp. as the prospective bacterial host. Subsequent studies have confirmed multiple host species under Phylum Bacteroidetes and some Firmicutes. Detection of crAss-like phages in sewage-contaminated environmental water and robust correlation with enteric viruses and bacteria has culminated in their adoption as a microbial source tracking (MST) marker. Polymerase chain reaction (PCR) and real-time PCR assays have been developed utilizing the conserved genes in the p-crAssphage genome to detect human fecal contamination of different water sources, with high specificity. Numerous investigations have examined the implications of crAss-like phages in diverse disease conditions, including ulcerative colitis, obesity and metabolic syndrome, autism spectrum disorders, rheumatoid arthritis, atopic eczema, and other autoimmune disorders. These studies have unveiled associations between certain diseases and diminished abundance and diversity of crAss-like phages. This review offers insights into the diverse aspects of research on crAss-like phages, including their discovery, genomic characteristics, structure, taxonomy, isolation, molecular detection, application as an MST marker, and role as a gut microbiome modulator with consequential health implications.
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Gharbia AS, Zákányi B, Tóth M. Impact of sand media continuous drying and rewetting cyclic on nutrients transformation performance from reclaimed wastewater effluent at soil aquifer treatment. Sci Rep 2024; 14:8065. [PMID: 38580711 PMCID: PMC10997582 DOI: 10.1038/s41598-024-58787-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 04/03/2024] [Indexed: 04/07/2024] Open
Abstract
Reusing reclaimed wastewater became a practical resource for water utilization in groundwater recharge and irrigation activities. However, the quality of reclaimed wastewater needs improvement to meet the environmental regulations and reduce contamination risks. A laboratory-scale study simulated a soil aquifer treatment (SAT) system, exploring the synergistic effects of wet and dry cycles alongside key physicochemical parameters on pollutant removal efficiency using a glass column filled with quartz sand as the filtration medium. The investigation focused on the cyclic wetting and drying phases to unravel their impact on removing NH4+, NO3-, and PO43-. The synthetic wastewater introduced into the system exhibited varying pollutant concentrations during wet and dry periods, influenced by dynamic soil water content (WC%), pH, dissolved oxygen (DO), and oxidation-reduction potential (ORP). The high removal rates of 93% for PO43- and 43% for Total N2 demonstrate the system's capability to reduce concentrations significantly under dynamic alternating between wet and dry conditions. Results unveiled that the wet period consistently yielded higher removal rates for N2 species. Interestingly, for PO43-, the dry periods demonstrated a higher removal efficiency. Moreover, the study identified an average NO3- production during the experimental phases as a byproduct of nitrification. The average NO3- production in wet periods was 2.5 mg/L, whereas it slightly decreased to 2.2 mg/L in dry periods. These findings underscore the nuanced influence of wet and dry conditions on specific pollutants within SAT systems. Applying the logistic regression model and principal component analysis demonstrated the statistical significance of WC, pH, DO, and ORP in predicting wet/dry conditions, providing quantitative insights into their influential roles on the nutrient dynamic concentrations. This study contributes valuable data to our understanding of SAT systems, offering practical implications for designing and implementing sustainable wastewater treatment practices and pollution management across diverse environmental contexts.
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Affiliation(s)
- Abdalkarim S Gharbia
- Faculty of Earth Science and Engineering, Institute of Environmental Management, University of Miskolc, Miskolc, Hungary.
| | - Balázs Zákányi
- Faculty of Earth Science and Engineering, Institute of Environmental Management, University of Miskolc, Miskolc, Hungary
| | - Márton Tóth
- Faculty of Earth Science and Engineering, Institute of Environmental Management, University of Miskolc, Miskolc, Hungary
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Sahya A, Sonkamble S, Jampani M, Narsing Rao A, Amerasinghe P. Field site soil aquifer treatment shows enhanced wastewater quality: Evidence from vadose zone hydro-geophysical observations. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118749. [PMID: 37591092 DOI: 10.1016/j.jenvman.2023.118749] [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: 05/06/2023] [Revised: 07/24/2023] [Accepted: 08/09/2023] [Indexed: 08/19/2023]
Abstract
Soil aquifer treatment (SAT) is an emerging, nature-based, economically viable wastewater treatment solution. Currently, most SAT experiments are done at the laboratory scale, which cannot generate the same conditions as natural field sites and limits the understanding of treatment efficiency. The current study carried out in situ SAT experiments in the Musi River basin in India, where wastewater irrigation is a common practice. SAT efficiency was determined using an integrated approach, including electrical resistivity tomography (ERT) surveys, soil investigations (grain size, permeability, and moisture measurements), and biochemical characterization of raw and SAT treated wastewater. The ERT scans of SAT column show lower order electrical resistivity 10-30 Ω-m with enhanced chargeability >5-6 mV/V attributed to the vadose zone, characterized by clay-rich soil and sandy soil up to 5-6 m depth. The increase in sand percentage (>70%) below 140-160 cm depth corroborates with the high moisture content (23.5%). The vadose zone permeability (K) 1.58 m/day and discharge (Q) 38.19 m3/day is used to determine the pollutants reduction efficiency of SAT column. Hydrogeological and biogeochemical observations reveal that the improved dissolved oxygen from <1.0 to 5-6 mg/L in the vadose zone catalyzes the oxidation of organic matter resulting in the reduction of BOD and COD up to 92% and 97%, respectively, and denitrification reducing NO3-- (0.55 kg/day). In addition, the precipitation and adsorption by kaolinite clay prompted the reduction of PO42- (0.26 kg/day). Furthermore, the oxic-vadose zone could not support the growth of coliforms and faecal coliforms, and the reduction observed was up to 99.99% in the SAT production well. Overall, the results indicated a positive outcome with SAT efficiency and framed the SAT sitting criteria for different geological environments.
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Affiliation(s)
- Ashalata Sahya
- Department of Environmental Science, Osmania University, Hyderabad, India
| | - Sahebrao Sonkamble
- CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad, India.
| | - Mahesh Jampani
- International Water Management Institute (IWMI-CGIAR), Battaramulla, Colombo, Sri Lanka
| | - Alwal Narsing Rao
- Department of Environmental Science, Osmania University, Hyderabad, India
| | - Priyanie Amerasinghe
- International Water Management Institute (IWMI-CGIAR), Battaramulla, Colombo, Sri Lanka
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8
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Ramos-Barbero MD, Gómez-Gómez C, Sala-Comorera L, Rodríguez-Rubio L, Morales-Cortes S, Mendoza-Barberá E, Vique G, Toribio-Avedillo D, Blanch AR, Ballesté E, Garcia-Aljaro C, Muniesa M. Characterization of crAss-like phage isolates highlights Crassvirales genetic heterogeneity and worldwide distribution. Nat Commun 2023; 14:4295. [PMID: 37463935 PMCID: PMC10354031 DOI: 10.1038/s41467-023-40098-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 07/07/2023] [Indexed: 07/20/2023] Open
Abstract
Crassvirales (crAss-like phages) are an abundant group of human gut-specific bacteriophages discovered in silico. The use of crAss-like phages as human fecal indicators is proposed but the isolation of only seven cultured strains of crAss-like phages to date has greatly hindered their study. Here, we report the isolation and genetic characterization of 25 new crAss-like phages (termed crAssBcn) infecting Bacteroides intestinalis, belonging to the order Crassvirales, genus Kehishuvirus and, based on their genomic variability, classified into six species. CrAssBcn phage genomes are similar to ΦCrAss001 but show genomic and aminoacidic differences when compared to other crAss-like phages of the same family. CrAssBcn phages are detected in fecal metagenomes around the world at a higher frequency than ΦCrAss001. This study increases the known crAss-like phage isolates and their abundance and heterogeneity open the question of what member of the Crassvirales group should be selected as human fecal marker.
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Affiliation(s)
- María Dolores Ramos-Barbero
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Clara Gómez-Gómez
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Laura Sala-Comorera
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Lorena Rodríguez-Rubio
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Sara Morales-Cortes
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Elena Mendoza-Barberá
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Gloria Vique
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Daniel Toribio-Avedillo
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Anicet R Blanch
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Elisenda Ballesté
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Cristina Garcia-Aljaro
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain
| | - Maite Muniesa
- Departament de Genètica, Microbiologia i Estadística, Universitat de Barcelona, Diagonal 643. Annex. Floor 0, E-08028, Barcelona, Spain.
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9
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Gharoon N, Pagilla K. Dissolved organic nitrogen removal and its mechanisms during simulated soil aquifer treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 881:163516. [PMID: 37059138 DOI: 10.1016/j.scitotenv.2023.163516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 04/05/2023] [Accepted: 04/11/2023] [Indexed: 06/01/2023]
Abstract
Soil aquifer treatment systems are known to further remove contaminants in wastewater effluent when applied through infiltration into the ground. Dissolved organic nitrogen (DON) in the effluent, a precursor for nitrogenous disinfection by-products (DBPs) such as N-nitrosodimethylamine (NDMA), is of great concern upon subsequent use of the groundwater infiltered into the aquifer. In this study, the vadose zone of the soil aquifer treatment system was simulated using 1 m laboratory soil columns under unsaturated conditions representing the vadose zone. The final effluent of a water reclamation facility (WRF) was applied to these columns to investigate the removal of N species with a focus on DON, as well as NDMA precursors. DON removal achieved was up to 99 % with an average of 68 % and was accompanied by a 52 % nitrate increase suggesting the occurrence of ammonification and nitrification through the soil columns. Around 62 % of total DON removal was seen at <10 cm travel distance, which was in accordance with higher adenosine triphosphate (ATP) concentrations at the top of the column due to more oxygen and organic matter availability. Total Dissolved N removal was drastically lowered to 4.5 % in the same column without microbial growth, which highlights the importance of biodegradation. The columns were capable of removing 56 % of the fluorescent dissolved organic matter (FDOM). Soil columns could remove NDMA precursors up to 92 % through the column with the initial concentration of 89.5 ng/L, possibly due to the removal of DON fractions. The results demonstrate the capability of the vadose zone in further treatment of DON and other organic matter before reaching the groundwater through infiltration or indirect discharge to surface water. Differences in applied water quality and the site-specific oxic conditions in SAT systems could lead to variable removal efficiencies.
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Affiliation(s)
- Niloufar Gharoon
- Department of Civil and Environmental Engineering, University of Nevada Reno, Reno, NV 89557, USA
| | - Krishna Pagilla
- Department of Civil and Environmental Engineering, University of Nevada Reno, Reno, NV 89557, USA.
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10
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Zhiteneva V, Mosher J, Gerba CP, Rauch-Williams T, Drewes JE. A new workflow for assigning removal credits to assess overall performance of managed aquifer recharge (MAR). WATER RESEARCH 2023; 235:119836. [PMID: 36931188 DOI: 10.1016/j.watres.2023.119836] [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: 06/28/2022] [Revised: 02/27/2023] [Accepted: 03/04/2023] [Indexed: 06/18/2023]
Abstract
Pathogen removal in managed aquifer recharge (MAR) systems is dependent upon numerous operational, physicochemical water quality, and biological parameters. Due to the site-specific conditions affecting these parameters, guidelines for specifying pathogen removal have historically taken rather precautionary and conservative approaches in order to protect groundwater quality and public health. A literature review of regulated pathogens in MAR applications was conducted and compared to up-and-coming indicators and surrogates for pathogen assessment, all of which can be gathered into a toolbox from which regulators and operators alike can select appropriate pathogens for monitoring and optimization of MAR practices. Combined with improved knowledge of pathogen fate and transport obtained through lab- and pilot-scale studies and supported by modeling, this foundation can be used to select appropriate, site-specific pathogens for regarding a more efficient pathogen retention, ultimately protecting public health and reducing costs. This paper outlines a new 10 step-wise workflow for moving towards determining robust removal credits for pathogens based on risk management principles. This approach is tailored to local conditions while reducing overly conservative regulatory restrictions or insufficient safety contingencies. The workflow is intended to help enable the full potential of MAR as more planned water reuse systems are implemented in the coming years.
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Affiliation(s)
- Veronika Zhiteneva
- Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, Garching 85748, Germany; Kompetenzzentrum Wasser Berlin gGmbH, Cicerostrasse 24, Berlin 10709, Germany.
| | - Jeff Mosher
- Santa Ana Watershed Project Authority, 11615 Sterling Ave, Riverside, CA 92503, USA
| | - Charles P Gerba
- Department of Environmental Science, The University of Arizona, Tucson, AZ 85721, USA
| | - Tanja Rauch-Williams
- Carollo Engineers, Inc., 390 Interlocken Crescent, Suite 800, Broomfield, CO 80021, USA
| | - Jörg E Drewes
- Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, Garching 85748, Germany
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11
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Han J, Xu Y, Xu D, Niu Y, Li L, Li F, Li Z, Wang H. Mechanism of downward migration of quinolone antibiotics in antibiotics polluted natural soil replenishment water and its effect on soil microorganisms. ENVIRONMENTAL RESEARCH 2023; 218:115032. [PMID: 36502909 DOI: 10.1016/j.envres.2022.115032] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 12/06/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
Reclaimed water is widely concerned as an effective recharge of groundwater and surface water, but trace organic pollutants produced by traditional wastewater treatment plants (WWTPs) would cause environmental pollution (water and soil) during infiltration. Therefore, the effects of reclaimed water containing ofloxacin (OFL) and ciprofloxacin (CIP) in antibiotics polluted natural soil (APNS) were investigated by simulating soil aquifer treatment systems (SATs). The experiment results showed that OFL and CIP in water were adsorbed and microbially degraded mainly at 30 cm, and the concentration of OFL and CIP in soil increased with depth, which were mainly due to the desorption from APNS. Concurrently, the change in replenishment water concentration also significantly affected OFL and CIP in pore water and soil. Although OFL and CIP inhibited the diversity of soil microbial community, they also promoted the growth of some microorganisms. As the dominant bacteria, Proteobacteria and Acidobacteriota can effectively participate in the degradation of OFL and CIP. The degradation effects of soil microorganisms on OFL and CIP were 45.48% and 42.39%, respectively, indicating that soil microorganisms selectively degraded pollutants. This experiment was carried out on APNS, which provided a reference for future studies on the migration of trace organic pollutants under natural conditions.
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Affiliation(s)
- Jinlong Han
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China; Beijing Institute of Water Science and Technology, Beijing, 100048, PR China; School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China
| | - Yufei Xu
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China
| | - Duo Xu
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China
| | - Yunxia Niu
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China; Hebei Mining Area Ecological Restoration Industry Technology Research Institute Tangshan, 063000, PR China
| | - Lei Li
- Beijing Institute of Water Science and Technology, Beijing, 100048, PR China
| | - Fuping Li
- Hebei Mining Area Ecological Restoration Industry Technology Research Institute Tangshan, 063000, PR China
| | - Zhaoxin Li
- Beijing Institute of Water Science and Technology, Beijing, 100048, PR China; School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan, 056038, PR China.
| | - Hao Wang
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China; Hebei Mining Area Ecological Restoration Industry Technology Research Institute Tangshan, 063000, PR China.
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12
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Sabar MA, Honda R, Haramoto E. CrAssphage as an indicator of human-fecal contamination in water environment and virus reduction in wastewater treatment. WATER RESEARCH 2022; 221:118827. [PMID: 35820313 DOI: 10.1016/j.watres.2022.118827] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 05/14/2023]
Abstract
Viral indicators of human-fecal contamination in wastewaters and environmental waters have been getting much attention in the past decade. Cross-assembly phage (crAssphage) is the most abundant DNA virus in human feces. Recently, the usefulness of crAssphage as a microbial source tracking and water quality monitoring tool for human-fecal contamination has been highlighted. Here, we conducted a comprehensive review on crAssphage in water, focusing on detection methodology, concentration range in various waters and wastewaters, specificity to human-fecal contamination, and reduction in wastewater treatment systems. This review highlights that crAssphage is globally distributed in wastewaters and various fecal-contaminated water bodies at high concentrations without seasonal fluctuations. CrAssphage is highly specific to human-fecal contamination and is rarely found in animal feces. It also has a good potential as a performance indicator to ensure virus reduction in wastewater treatment systems. Accordingly, crAssphage could be an effective tool for monitoring of human-fecal contamination and potential presence of fecal pathogenic microbes in environmental waters. Bridging the research gaps highlighted in this review would make crAssphage a powerful tool to support the control of water-related health risks.
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Affiliation(s)
| | - Ryo Honda
- Faculty of Geoscience and Civil Engineering, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
| | - Eiji Haramoto
- Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Japan
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13
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Dhakar V, Geetanjali AS. Role of pepper mild mottle virus as a tracking tool for fecal pollution in aquatic environments. Arch Microbiol 2022; 204:513. [PMID: 35864362 PMCID: PMC9303839 DOI: 10.1007/s00203-022-03121-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 06/23/2022] [Accepted: 07/01/2022] [Indexed: 11/28/2022]
Abstract
The plant pathogen pepper mild mottle virus (PMMoV) has recently been proposed as a water quality indicator, it is a RNA virus belonging to the genus Tobamovirus in the family Virgoviridae that causes harm to the pepper crops. After consuming processed food products containing infected peppers, such as hot sauces, PMMoV is excreted in high concentrations in feces; therefore, this is the most common RNA virus, constantly found in the feces of humans. The fecal-oral pathway is emerging as an environmental problem. The presence of high concentrations of pathogens associated with human excreta in environmental waters or water reuse supplies poses a threat to public health. Due to the difficulty in determining the presence of pathogens effectively in water, attempts to monitor microbial water quality often use surrogates or indicator organisms that can be easily detected; therefore, PMMoV is used as a viral surrogate in aquatic environment. This paper describes the incidence and persistence of PMMoV in aquatic environments and in waste treatment plants and its usefulness for quantifying virus reductions by advanced water treatment technologies. In recent research, SARS-CoV-2 was reported to be found in wastewater and utilized for the purpose of monitoring coronavirus illness outbreaks. Since PMMoV is readily identified in the human feces and can also serve as an indicator of human waste, the determined PMMoV concentrations may be utilized to give the normalized report of the SARS-CoV-2 concentration, so that, the amount of human waste found in the wastewater can be taken into consideration.
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Affiliation(s)
- Vaishali Dhakar
- Department of Genetic Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu India
| | - A. Swapna Geetanjali
- Department of Genetic Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu India
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14
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Miao X, Liu C, Liu M, Han X, Zhu L, Bai X. The role of pipe biofilms on dissemination of viral pathogens and virulence factor genes in a full-scale drinking water supply system. JOURNAL OF HAZARDOUS MATERIALS 2022; 432:128694. [PMID: 35316639 DOI: 10.1016/j.jhazmat.2022.128694] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 02/24/2022] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Water is an important medium for virus transmission and viral pathogens are increasingly appreciated as a significant water safety issue. However, the effect of pipe biofilms on viral pathogens remains unclear. This research aimed to investigate the dissemination of viruses in a full-scale drinking water supply system (DWSS) and the effect of pipe biofilms on viral pathogens in bulking water. Viral pathogens, pathogenic viral hosts, and viral virulence factors (VFs) were found to disseminate from source water to tap water. The proportion of virus and viral VFs in the biofilm was far less than that in water. The contribution of biofilms in pipe wall to viruses and viral VFs in bulking water was less than 4%, and viruses in the biofilm had no obvious effect on pathogenic viruses in water. Dominant viruses carrying VFs changed from Cyanobacteria virus to Mycobacterium virus after advanced water treatment. Mycobacterium and organics were identified as the key factors influencing composition and abundance of viral VFs, which could explain 41.1% of the variation in viral virulence in the water supply system. Host bacteria and organics may be used as the key targets to control the risk of viruses in DWSSs.
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Affiliation(s)
- Xiaocao Miao
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Chenxu Liu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Mingkun Liu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Xue Han
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Lingling Zhu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Xiaohui Bai
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, PR China.
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15
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Jeffrey P, Yang Z, Judd SJ. The status of potable water reuse implementation. WATER RESEARCH 2022; 214:118198. [PMID: 35259687 DOI: 10.1016/j.watres.2022.118198] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 02/11/2022] [Accepted: 02/12/2022] [Indexed: 05/26/2023]
Abstract
A review of the current status of direct and indirect potable water reuse (DPR/IPR) implementation has been conducted, focusing on the regulatory and practical aspects and with reference to the most recent published literature. The review encompasses (a) the principal contaminant types, their required removal and the methods by which their concentration is monitored, (b) regulatory approaches and stipulations in assessing/ratifying treatment schemes and maintaining treated water quality, and (c) existing full-scale installations. Analytical methods discussed include established in-line monitoring tools, such as turbidity measurement, to more recent polymerase chain reaction (PCR)-based assay methods for microbial detection. The key risk assessment tools of quantitative microbial risk assessment (QMRA) and water safety plans (WSPs) are considered in relation to their use in selecting/ratifying treatment schemes, and the components of the treatment schemes from 40 existing IPR/DPR installations summarised. Five specific schemes are considered in more detail. The review reveals:Whilst there are a number of ongoing projects where RO is not used because of the challenge imposed by disposal of RO concentrate, the prevalence of the sequential RO-UV combination implies the importance of quantifying the impact of process upsets on these unit operations.
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Affiliation(s)
- P Jeffrey
- Cranfield Water Science Institute, Cranfield, Beds, United Kingdom.
| | - Z Yang
- Cranfield Water Science Institute, Cranfield, Beds, United Kingdom
| | - S J Judd
- Cranfield Water Science Institute, Cranfield, Beds, United Kingdom.
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16
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17
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Yasui M, Iso H, Torii S, Matsui Y, Katayama H. Applicability of pepper mild mottle virus and cucumber green mottle mosaic virus as process indicators of enteric virus removal by membrane processes at a potable reuse facility. WATER RESEARCH 2021; 206:117735. [PMID: 34673461 DOI: 10.1016/j.watres.2021.117735] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/25/2021] [Accepted: 09/29/2021] [Indexed: 05/09/2023]
Abstract
Treatment of wastewater for potable reuse is increasingly becoming a suitable alternative water source to meet the growing urban water needs worldwide. Potable reuse requires reduction of enteric viruses to levels at which they do not pose a risk to human health. Advanced water treatment trains (e.g., microfiltration (MF), ultrafiltration (UF), reverse osmosis (RO), and ultraviolet light and advanced oxidation process (UV/AOP)) provide significant protection and reduce virus loads in highly treated final product waters. Even though viruses are a principal concern, the performance of virus removal by membrane processes is not easily determined. The objective of this study was to evaluate the applicability of Aichi virus (AiV), pepper mild mottle virus (PMMoV), cucumber green mottle mosaic virus (CGMMV), and cross-assembly phage (crAssphage) removal as possible process indicators for MF, UF, and RO. Virus log reduction values (LRVs) based on gene copies measured using molecular methods were determined for MF and UF. The median LRVs of all viruses obtained after MF and UF were 2.9 and 3.1, respectively. The LRVs of the proposed indicators were lower than those of human enteric viruses. The morphological and physicochemical difference among indicators was not found to affect LRVs. Therefore, all proposed indicator viruses were determined to be suitable candidates as process indicators for MF and UF. Regarding RO, most of the viruses measured in this study were undetectable in permeate. Only PMMoV and CGMMV were detected showing median LRVs of 2.8 and 2.5, respectively. PMMoV and CGMMV are recommended as good process indicators of physical virus removal for the overall water treatment process.
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Key Words
- AIV, aichi virus
- Abbreviation: MF, microfiltration
- AdV, adenovirus
- CGMMV, cucumber green mottle mosaic virus
- Crassphage, cross-assembly phage
- EF, effluent
- Human enteric virus
- LRV, log reduction value
- MME, molecular method efficiencies
- MNV, Murine Norovirus
- MPC, molecular process control
- Microfiltration
- NV GI, norovirus GI
- NV GII, norovirus GII
- ORSV, Odontoglossum Ringspot Virus
- PCE, primary concentration efficiency
- PMMOV, pepper mild mottle virus
- Process indicator
- RO, reverse osmosis
- Reverse osmosis
- UF, ultrafiltration
- UV/AOP, ultraviolet light and advanced oxidation process
- Ultrafiltration
- Water reuse
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Affiliation(s)
- Midori Yasui
- Department of Urban Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Hikaru Iso
- Department of Urban Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Shotaro Torii
- Department of Urban Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | | | - Hiroyuki Katayama
- Department of Urban Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan.
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18
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Fonseca-Salazar MA, Díaz-Avalos C, Rochin-García H, Espinosa-García AC, Mazari-Hiriart M. Risk transfer from a megacity to a peri-urban agricultural community: wastewater reuse and effects on groundwater quality. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:741. [PMID: 34674049 DOI: 10.1007/s10661-021-09520-1] [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: 04/27/2020] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Urban wastewater is a resource that can be reused, but its management must be carefully executed, considering its potential impact on public and environmental health. Unfortunately, marked differences in the quality of treatment, management, collection, and the monitoring of wastewater exist among low-, middle-, and high-income countries. This is the case of the Mezquital Valley, a semi-rural area that is composed of agricultural and industrial communities on the outskirts of Mexico City. For over 100 years, wastewater from Mexico City and its areas of conurbation has been sent to the Mezquital Valley, with few studies having been conducted to assess the existence and severity of bacterial and pathogen infiltration into the local aquifer. In this research, we present an assessment of wastewater infiltration transported from Mexico City, used for irrigation, with potential infiltration into the Mezquital Valley aquifer. We utilized stable isotope analysis of deuterium and oxygen-18 to determine whether a mixture of untreated wastewater from the Mexico City Metropolitan Area (MCMA) flows into the Mezquital aquifer. Also, tests for adenovirus, rotavirus, fecal coliform, fecal enterococci, Giardia lamblia, and Cryptosporidium parvum were employed to determine the presence of fecal indicators and pathogens in different water sources in the study area. The results show the presence of indicators and pathogens in local wells used as water supply in Mezquital Valley. The presence of such indicators suggests that pathogens can reach the water consumed by the inhabitants, posing a hazard to persons exposed to these waters during their normal daily-life activities.
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Affiliation(s)
| | - Carlos Díaz-Avalos
- Departamento de Probabilidad Y Estadística, Instituto de Invsetigaciones en Matemáticas Aplicadas y en Sistemas, UNAM, Mexico City, Mexico.
| | - Hermes Rochin-García
- Posgrado en Ciencias de La Tierra, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Ana Cecilia Espinosa-García
- Laboratorio Nacional de Ciencias de La Sostenibilidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Marisa Mazari-Hiriart
- Laboratorio Nacional de Ciencias de La Sostenibilidad, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Li X, Zhang S, Shi J, Luby SP, Jiang G. Uncertainties in estimating SARS-CoV-2 prevalence by wastewater-based epidemiology. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2021; 415:129039. [PMID: 33642938 PMCID: PMC7896122 DOI: 10.1016/j.cej.2021.129039] [Citation(s) in RCA: 105] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/03/2021] [Accepted: 02/15/2021] [Indexed: 05/05/2023]
Abstract
Wastewater-based epidemiology (WBE) is a promising approach for estimating population-wide COVID-19 prevalence through detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA in wastewater. However, various methodological challenges associated with WBE would affect the accuracy of prevalence estimation. To date, the overall uncertainty of WBE and the impact of each step on the prevalence estimation are largely unknown. This study divided the WBE approach into five steps (i.e., virus shedding; in-sewer transportation; sampling and storage; analysis of SARS-CoV-2 RNA concentration in wastewater; back-estimation) and further summarized and quantified the uncertainties associated with each step through a systematic review. Although the shedding of SARS-CoV-2 RNA varied greatly between COVID-19 positive patients, with more than 10 infected persons in the catchment area, the uncertainty caused by the excretion rate became limited for the prevalence estimation. Using a high-frequency flow-proportional sampling and estimating the prevalence through actual water usage data significantly reduced the overall uncertainties to around 20-40% (relative standard deviation, RSD). And under such a scenario, the analytical uncertainty of SARS-CoV-2 RNA in wastewater was the dominant factor. This highlights the importance of using surrogate viruses as internal or external standards during the wastewater analysis, and the need for further improvement on analytical approaches to minimize the analytical uncertainty. This study supports the application of WBE as a complementary surveillance strategy for monitoring COVID-19 prevalence and provides methodological improvements and suggestions to enhance the reliability for future studies.
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Affiliation(s)
- Xuan Li
- School of Civil, Mining and Environmental Engineering, University of Wollongong, Australia
| | - Shuxin Zhang
- School of Civil, Mining and Environmental Engineering, University of Wollongong, Australia
| | - Jiahua Shi
- School of Civil, Mining and Environmental Engineering, University of Wollongong, Australia
| | - Stephen P Luby
- Woods Institute for the Environment, Stanford University, United States
| | - Guangming Jiang
- School of Civil, Mining and Environmental Engineering, University of Wollongong, Australia
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia
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20
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Sasidharan S, Bradford SA, Šimůnek J, Kraemer SR. Virus transport from drywells under constant head conditions: A modeling study. WATER RESEARCH 2021; 197:117040. [PMID: 33774462 PMCID: PMC9126062 DOI: 10.1016/j.watres.2021.117040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/24/2021] [Accepted: 03/10/2021] [Indexed: 06/10/2023]
Abstract
Many arid and semi-arid regions of the world face challenges in maintaining the water quantity and quality needs of growing populations. A drywell is an engineered vadose zone infiltration device widely used for stormwater capture and managed aquifer recharge. To our knowledge, no prior studies have quantitatively examined virus transport from a drywell, especially in the presence of subsurface heterogeneity. Axisymmetric numerical experiments were conducted to systematically study virus fate from a drywell for various virus removal and subsurface heterogeneity scenarios under steady-state flow conditions from a constant head reservoir. Subsurface domains were homogeneous or had stochastic heterogeneity with selected standard deviation (σ) of lognormal distribution in saturated hydraulic conductivity and horizontal (X) and vertical (Z) correlation lengths. Low levels of virus concentration tailing can occur even at a separation distance of 22 m from the bottom of the drywell, and 6-log10 virus removal was not achieved when a small detachment rate (kd1=1 × 10⁻⁵ min⁻¹) is present in a homogeneous domain. Improved virus removal was achieved at a depth of 22 m in the presence of horizontal lenses (e.g., X=10 m, Z=0.1 m, σ=1) that enhanced the lateral movement and distribution of the virus. In contrast, faster downward movement of the virus with an early arrival time at a depth of 22 m occurred when considering a vertical correlation in permeability (X=1 m, Z=2 m, σ=1). Therefore, the general assumption of a 1.5-12 m separation distance to protect water quality may not be adequate in some instances, and site-specific microbial risk assessment is essential to minimize risk. Microbial water quality can potentially be improved by using an in situ soil treatment with iron oxides to increase irreversible attachment and solid-phase inactivation.
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Affiliation(s)
- Salini Sasidharan
- Department of Environmental Sciences, University of California, Riverside, CA 92521, USA; United States Department of Agriculture, Agricultural Research Service, Sustainable Agricultural Water Systems Unit, Davis, CA 95616, USA.
| | - Scott A Bradford
- United States Department of Agriculture, Agricultural Research Service, Sustainable Agricultural Water Systems Unit, Davis, CA 95616, USA
| | - Jiří Šimůnek
- Department of Environmental Sciences, University of California, Riverside, CA 92521, USA
| | - Stephen R Kraemer
- U.S. Environmental Protection Agency, Office of Research and Development, San Francisco, CA 94105, USA
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21
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Sellaoui L, Badawi M, Monari A, Tatarchuk T, Jemli S, Luiz Dotto G, Bonilla-Petriciolet A, Chen Z. Make it clean, make it safe: A review on virus elimination via adsorption. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2021; 412:128682. [PMID: 33776550 PMCID: PMC7983426 DOI: 10.1016/j.cej.2021.128682] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/21/2020] [Accepted: 01/13/2021] [Indexed: 05/09/2023]
Abstract
Recently, the potential dangers of viral infection transmission through water and air have become the focus of worldwide attention, via the spread of COVID-19 pandemic. The occurrence of large-scale outbreaks of dangerous infections caused by unknown pathogens and the isolation of new pandemic strains require the development of improved methods of viruses' inactivation. Viruses are not stable self-sustaining living organisms and are rapidly inactivated on isolated surfaces. However, water resources and air can participate in the pathogens' diffusion, stabilization, and transmission. Viruses inactivation and elimination by adsorption are relevant since they can represent an effective and low-cost method to treat fluids, and hence limit the spread of pathogen agents. This review analyzed the interaction between viruses and carbon-based, oxide-based, porous materials and biological materials (e.g., sulfated polysaccharides and cyclodextrins). It will be shown that these adsorbents can play a relevant role in the viruses removal where water and air purification mostly occurring via electrostatic interactions. However, a clear systematic vision of the correlation between the surface potential and the adsorption capacity of the different filters is still lacking and should be provided to achieve a better comprehension of the global phenomenon. The rationalization of the adsorption capacity may be achieved through a proper physico-chemical characterization of new adsorbents, including molecular modeling and simulations, also considering the adsorption of virus-like particles on their surface. As a most timely perspective, the results on this review present potential solutions to investigate coronaviruses and specifically SARS-CoV-2, responsible of the COVID-19 pandemic, whose spread can be limited by the efficient disinfection and purification of closed-spaces air and urban waters.
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Affiliation(s)
- Lotfi Sellaoui
- Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Michael Badawi
- Laboratoire de Physique et Chimie Théoriques LPCT UMR CNRS 7019, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Antonio Monari
- Laboratoire de Physique et Chimie Théoriques LPCT UMR CNRS 7019, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Tetiana Tatarchuk
- Educational and Scientific Center of Materials Science and Nanotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk 76018, Ukraine
| | - Sonia Jemli
- Laboratory of Microbial Biotechnology, Enzymatic and Biomolecules (LMBEB), Centre of Biotechnology of Sfax, University of Sfax, Tunisia
- Faculty of Sciences of Sfax, Biology Department, University of Sfax, Tunisia
| | - Guilherme Luiz Dotto
- Chemical Engineering Department, Federal University of Santa Maria-UFSM, 1000, Roraima Avenue, 97105-900 Santa Maria, RS, Brazil
| | | | - Zhuqi Chen
- Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
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22
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Adelodun B, Tiamiyu AO, Ajibade FO, Odey G, Ibrahim RG, Goala M, Bakare HO, Ajibade TF, Adeniran JA, Adeniran KA, Choi KS. Presence, detection, and persistence of SARS-CoV-2 in wastewater and the sustainable remedial measures. ENVIRONMENTAL AND HEALTH MANAGEMENT OF NOVEL CORONAVIRUS DISEASE (COVID-19 ) 2021. [PMCID: PMC8237515 DOI: 10.1016/b978-0-323-85780-2.00014-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Adelodun B, Ajibade FO, Ighalo JO, Odey G, Ibrahim RG, Kareem KY, Bakare HO, Tiamiyu AO, Ajibade TF, Abdulkadir TS, Adeniran KA, Choi KS. Assessment of socioeconomic inequality based on virus-contaminated water usage in developing countries: A review. ENVIRONMENTAL RESEARCH 2021; 192:110309. [PMID: 33045227 DOI: 10.1016/j.envre.2020.110309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/20/2020] [Accepted: 10/04/2020] [Indexed: 05/24/2023]
Abstract
Water is an essential resource required for various human activities such as drinking, cooking, and other recreational activities. While developed nations have made significant improvement in providing adequate quality water and sanitation devoid of virus contaminations to a significant percentage of the residences, many of the developing countries are still lacking in these regards, leading to many death cases among the vulnerable due to ingestion of virus-contaminated water and other waterborne pathogens. However, the recent global pandemic of COVID-19 seems to have changed the paradigm by reawakening the importance of water quality and sanitation, and focusing more attention on the pervasive effect of the use of virus-contaminated water as it can be a potential driver for the spread of the virus and other waterborne diseases, especially in developing nations that are characterized by low socioeconomic development. Therefore, this review assessed the socioeconomic inequalities related to the usage of virus-contaminated water and other waterborne pathogens in developing countries. The socioeconomic factors attributed to the various waterborne diseases due to the use of virus-contaminated water in many developing countries are poverty, the standard of living, access to health care facilities, age, gender, and level of education. Some mitigation strategies to address the viral contamination of water sources are therefore proposed, while future scope and recommendations on tackling the essential issues related to socioeconomic inequality in developing nations are highlighted.
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Affiliation(s)
- Bashir Adelodun
- Department of Agricultural Civil Engineering, Kyungpook National University, Daegu, South Korea; Department of Agricultural and Biosystems Engineering, University of Ilorin, PMB 1515, Ilorin, Nigeria.
| | - Fidelis Odedishemi Ajibade
- Department of Civil and Environmental Engineering, Federal University of Technology, PMB 704, Akure, Nigeria; Key Laboratory of Environmental Biotechnology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Joshua O Ighalo
- Department of Chemical Engineering, University of Ilorin, PMB 1515, Ilorin, Nigeria; Department of Chemical Engineering, Nnamdi Azikiwe University, P. M. B. 5025, Awka, Nigeria
| | - Golden Odey
- Department of Agricultural Civil Engineering, Kyungpook National University, Daegu, South Korea
| | | | - Kola Yusuff Kareem
- Department of Agricultural and Biosystems Engineering, University of Ilorin, PMB 1515, Ilorin, Nigeria
| | | | | | - Temitope F Ajibade
- Department of Civil and Environmental Engineering, Federal University of Technology, PMB 704, Akure, Nigeria; University of Chinese Academy of Sciences, Beijing, 100049, PR China; Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, PR China
| | | | - Kamoru Akanni Adeniran
- Department of Agricultural and Biosystems Engineering, University of Ilorin, PMB 1515, Ilorin, Nigeria
| | - Kyung Sook Choi
- Department of Agricultural Civil Engineering, Kyungpook National University, Daegu, South Korea; Institute of Agricultural Science & Technology, Kyungpook, National University, Daegu, South Korea.
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Adelodun B, Ajibade FO, Ighalo JO, Odey G, Ibrahim RG, Kareem KY, Bakare HO, Tiamiyu AO, Ajibade TF, Abdulkadir TS, Adeniran KA, Choi KS. Assessment of socioeconomic inequality based on virus-contaminated water usage in developing countries: A review. ENVIRONMENTAL RESEARCH 2021; 192:110309. [PMID: 33045227 PMCID: PMC7546968 DOI: 10.1016/j.envres.2020.110309] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/20/2020] [Accepted: 10/04/2020] [Indexed: 05/05/2023]
Abstract
Water is an essential resource required for various human activities such as drinking, cooking, and other recreational activities. While developed nations have made significant improvement in providing adequate quality water and sanitation devoid of virus contaminations to a significant percentage of the residences, many of the developing countries are still lacking in these regards, leading to many death cases among the vulnerable due to ingestion of virus-contaminated water and other waterborne pathogens. However, the recent global pandemic of COVID-19 seems to have changed the paradigm by reawakening the importance of water quality and sanitation, and focusing more attention on the pervasive effect of the use of virus-contaminated water as it can be a potential driver for the spread of the virus and other waterborne diseases, especially in developing nations that are characterized by low socioeconomic development. Therefore, this review assessed the socioeconomic inequalities related to the usage of virus-contaminated water and other waterborne pathogens in developing countries. The socioeconomic factors attributed to the various waterborne diseases due to the use of virus-contaminated water in many developing countries are poverty, the standard of living, access to health care facilities, age, gender, and level of education. Some mitigation strategies to address the viral contamination of water sources are therefore proposed, while future scope and recommendations on tackling the essential issues related to socioeconomic inequality in developing nations are highlighted.
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Affiliation(s)
- Bashir Adelodun
- Department of Agricultural Civil Engineering, Kyungpook National University, Daegu, South Korea; Department of Agricultural and Biosystems Engineering, University of Ilorin, PMB 1515, Ilorin, Nigeria.
| | - Fidelis Odedishemi Ajibade
- Department of Civil and Environmental Engineering, Federal University of Technology, PMB 704, Akure, Nigeria; Key Laboratory of Environmental Biotechnology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Joshua O Ighalo
- Department of Chemical Engineering, University of Ilorin, PMB 1515, Ilorin, Nigeria; Department of Chemical Engineering, Nnamdi Azikiwe University, P. M. B. 5025, Awka, Nigeria
| | - Golden Odey
- Department of Agricultural Civil Engineering, Kyungpook National University, Daegu, South Korea
| | | | - Kola Yusuff Kareem
- Department of Agricultural and Biosystems Engineering, University of Ilorin, PMB 1515, Ilorin, Nigeria
| | | | | | - Temitope F Ajibade
- Department of Civil and Environmental Engineering, Federal University of Technology, PMB 704, Akure, Nigeria; University of Chinese Academy of Sciences, Beijing, 100049, PR China; Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, PR China
| | | | - Kamoru Akanni Adeniran
- Department of Agricultural and Biosystems Engineering, University of Ilorin, PMB 1515, Ilorin, Nigeria
| | - Kyung Sook Choi
- Department of Agricultural Civil Engineering, Kyungpook National University, Daegu, South Korea; Institute of Agricultural Science & Technology, Kyungpook, National University, Daegu, South Korea.
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