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Boogaerts T, Van Wichelen N, Quireyns M, Burgard D, Bijlsma L, Delputte P, Gys C, Covaci A, van Nuijs ALN. Current state and future perspectives on de facto population markers for normalization in wastewater-based epidemiology: A systematic literature review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 935:173223. [PMID: 38761943 DOI: 10.1016/j.scitotenv.2024.173223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/10/2024] [Accepted: 05/11/2024] [Indexed: 05/20/2024]
Abstract
Wastewater-based epidemiology (WBE) and wastewater surveillance have become a valuable complementary data source to collect information on community-wide exposure through the measurement of human biomarkers in influent wastewater (IWW). In WBE, normalization of data with the de facto population that corresponds to a wastewater sample is crucial for a correct interpretation of spatio-temporal trends in exposure and consumption patterns. However, knowledge gaps remain in identifying and validating suitable de facto population biomarkers (PBs) for refinement of WBE back-estimations. WBE studies that apply de facto PBs (including hydrochemical parameters, utility consumption data sources, endo- and exogenous chemicals, biological biomarkers and signalling records) for relative trend analysis and absolute population size estimation were systematically reviewed from three databases (PubMed, Web of Science, SCOPUS) according to the PRISMA guidelines. We included in this review 81 publications that accounted for daily variations in population sizes by applying de facto population normalization. To date, a wide range of PBs have been proposed for de facto population normalization, complicating the comparability of normalized measurements across WBE studies. Additionally, the validation of potential PBs is complicated by the absence of an ideal external validator, magnifying the overall uncertainty for population normalization in WBE. Therefore, this review proposes a conceptual tier-based cross-validation approach for identifying and validating de facto PBs to guide their integration for i) relative trend analysis, and ii) absolute population size estimation. Furthermore, this review also provides a detailed evaluation of the uncertainty observed when comparing different de jure and de facto population estimation approaches. This study shows that their percentual differences can range up to ±200 %, with some exceptions showing even larger variations. This review underscores the need for collaboration among WBE researchers to further streamline the application of de facto population normalization and to evaluate the robustness of different PBs in different socio-demographic communities.
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Affiliation(s)
- Tim Boogaerts
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; Exposome Center of Excellence, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium
| | - Natan Van Wichelen
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; Exposome Center of Excellence, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium
| | - Maarten Quireyns
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; Exposome Center of Excellence, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium
| | - Dan Burgard
- Department of Chemistry and Biochemistry, University of Puget Sound, Tacoma, WA, USA
| | - Lubertus Bijlsma
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water, University Jaume I, Castellón, Spain
| | - Peter Delputte
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; Infla-Med Center of Excellence, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium
| | - Celine Gys
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; Exposome Center of Excellence, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium
| | - Adrian Covaci
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; Exposome Center of Excellence, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium
| | - Alexander L N van Nuijs
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; Exposome Center of Excellence, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium
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Price M, Tscharke B, Chappell A, Kah M, Sila-Nowicka K, Morris H, Ward D, Trowsdale S. Testing methods to estimate population size for wastewater treatment plants using census data: Implications for wastewater-based epidemiology. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 922:170974. [PMID: 38360313 DOI: 10.1016/j.scitotenv.2024.170974] [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: 01/31/2024] [Accepted: 02/12/2024] [Indexed: 02/17/2024]
Abstract
In wastewater-based epidemiology (WBE), wastewater loads are commonly reported as a per capita value. Census population counts are often used to obtain a population size to normalise wastewater loads. However, the methods used to calculate the population size of wastewater treatment plants (WWTPs) from census data are rarely reported in the WBE literature. This is problematic because the geographical extents of wastewater catchments and census area units rarely align perfectly with each other and exist at different spatial scales. This complicates efforts to estimate the number of people serviced by WWTPs in these census area units. This study compared four geospatial methods to combine wastewater catchment areas and census area units to calculate the census population size of wastewater treatment plants. These methods were applied nationally to WWTPs across New Zealand. Population estimates varied by up to 73 % between the methods, which could skew comparisons of per capita wastewater loads between sites. Variability in population estimates (relative standard deviation, RSD) was significantly higher in smaller catchments (rs = -0.727, P < .001), highlighting the importance of method selection in smaller sites. Census population estimates were broadly similar to those provided by wastewater operators, but significant variation was observed for some sites (ranging from 42 % lower to 78 % higher, RSD = 262 %). We present a widely applicable method to calculate population size from census, which involves disaggregating census area units by individual properties. The results reinforce the need for transparent reporting to maintain confidence in the comparison of WBE across sites and studies.
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Affiliation(s)
- Mackay Price
- School of Environment, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand.
| | - Ben Tscharke
- Queensland Alliance for Environmental Health Sciences, University of Queensland, 20 Cornwall Street, Queensland 4102, Australia
| | - Andrew Chappell
- Institute of Environmental Science and Research Ltd., 27 Creyke Road, Christchurch 8041, New Zealand
| | - Melanie Kah
- School of Environment, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - Katarzyna Sila-Nowicka
- School of Environment, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - Helen Morris
- Institute of Environmental Science and Research Ltd., 27 Creyke Road, Christchurch 8041, New Zealand
| | - Daniel Ward
- Environment Canterbury, 200 Tuam Street, Christchurch 8011, New Zealand
| | - Sam Trowsdale
- School of Environment, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
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Oloye FF, Xie Y, Challis JK, Femi-Oloye OP, Brinkmann M, McPhedran KN, Jones PD, Servos MR, Giesy JP. Understanding common population markers for SARS-CoV-2 RNA normalization in wastewater - A review. CHEMOSPHERE 2023; 333:138682. [PMID: 37201600 DOI: 10.1016/j.chemosphere.2023.138682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 02/14/2023] [Accepted: 04/11/2023] [Indexed: 05/20/2023]
Abstract
Wastewater monitoring and epidemiology have seen renewed interest during the recent COVID-19 pandemic. As a result, there is an increasing need to normalize wastewater-derived viral loads in local populations. Chemical tracers, both exogenous and endogenous compounds, have proven to be more stable and reliable for normalization than biological indicators. However, differing instrumentation and extraction methods can make it difficult to compare results. This review examines current extraction and quantification methods for ten common population indicators: creatinine, coprostanol, nicotine, cotinine, sucralose, acesulfame, androstenedione 5-hydroindoleacetic acid (5-HIAA), caffeine, and 1,7-dimethyluric acid. Some wastewater parameters such as ammonia, total nitrogen, total phosphorus, and daily flowrate were also evaluated. The analytical methods included direct injection, dilute and shoot, liquid/liquid, and solid phase extraction (SPE). Creatine, acesulfame, nicotine, 5-HIAA and androstenedione have been analysed by direct injection into LC-MS; however, most authors prefer to include SPE steps to avoid matrix effects. Both LC-MS and GC-MS have been successfully used to quantify coprostanol in wastewater, and the other selected indicators have been quantified successfully with LC-MS. Acidification to stabilize the sample before freezing to maintain the integrity of samples has been reported to be beneficial. However, there are arguments both for and against working at acidic pHs. Wastewater parameters mentioned earlier are quick and easy to quantify, but the data does not always represent the human population effectively. A preference for population indicators originating solely from humans is apparent. This review summarises methods employed for chemical indicators in wastewater, provides a basis for choosing an appropriate extraction and analysis method, and highlights the utility of accurate chemical tracer data for wastewater-based epidemiology.
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Affiliation(s)
- Femi F Oloye
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada.
| | - Yuwei Xie
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | | | | | - Markus Brinkmann
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, SK, Canada; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK, Canada
| | - Kerry N McPhedran
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK, Canada; Department of Civil, Geological and Environmental Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Paul D Jones
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, SK, Canada; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK, Canada
| | - Mark R Servos
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada
| | - John P Giesy
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada; Department of Environmental Sciences, Baylor University, Waco, TX, USA; Department of Integrative Biology and Center for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA.
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Xu L, Lu YT, Wu DF, Li X, Song M, Hang TJ, Su MX. Application of the metal ions as potential population biomarkers for wastewater-based epidemiology: estimating tobacco consumption in Southern China. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023:1-13. [PMID: 37060434 PMCID: PMC10105154 DOI: 10.1007/s10653-023-01558-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
Wastewater-based epidemiology (WBE) is an objective approach for the estimation of population-level exposure to a wide range of substances, in which the use of a population biomarker (PB) could significantly reduce back-calculation errors. Although some endogenous or exogenous compounds such as cotinine and other hormones have been developed as PBs, more PBs still need to be identified and evaluated. This study aimed to propose a novel method to estimate population parameters from the mass load of metal ion biomarkers in wastewater, and estimate the consumption of tobacco in 24 cities in Southern China using the developed method. Daily wastewater samples were collected from 234 wastewater treatment plants (WWTPs) in 24 cities in Southern China. Atomic absorption spectroscopy (AAS) was applied to determine the concentrations of common health-related metal ions in wastewater, including sodium (Na), potassium (K), magnesium (Mg), calcium (Ca), iron (Fe), and zinc (Zn), and compared them with the daily mass load of cotinine corresponding to catchment populations. The concentrations of cotinine in wastewater samples were measured using liquid chromatography-tandem mass spectrometry. There were clear and strong correlations between the target metal ion equivalent population and census data. The correlation coefficients (R) were RK = 0.78, RNa = 0.66, RCa = 0.81, RMg = 0.77, and RFe = 0.69, at p < 0.01 and R2 > 0.6. Subsequently, the combination of WBE and metal ion PBs was used to estimate tobacco consumption. Daily consumption of nicotine was estimated to be approximately 1.76 ± 1.19 mg/d/capita, equivalent to an average of 13.0 ± 8.75 cigarettes/d being consumed by smokers. The data on tobacco consumption in this study were consistent with those in traditional surveys in Southern China. The metal ion potassium is an appropriate PB for reflecting the real-time population and could be used to evaluate the tobacco consumption in WBE study.
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Affiliation(s)
- Lei Xu
- School of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
- China National Narcotics Control Commission - China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
- Department of Pharmacy, Ordos Central Hospital, No. 23 Yijinhuoluo Road, Ordos, 017000, China
| | - Yu-Ting Lu
- School of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
- China National Narcotics Control Commission - China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
| | - Dong-Feng Wu
- School of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
- China National Narcotics Control Commission - China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
| | - Xuan Li
- School of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
- China National Narcotics Control Commission - China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
| | - Min Song
- School of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
- China National Narcotics Control Commission - China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, Nanjing, 210009, China
| | - Tai-Jun Hang
- School of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, China.
- China National Narcotics Control Commission - China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, Nanjing, 210009, China.
| | - Meng-Xiang Su
- School of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, China.
- China National Narcotics Control Commission - China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, Nanjing, 210009, China.
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Temporal monitoring of stimulants during the COVID-19 pandemic in Belgium through the analysis of influent wastewater. THE INTERNATIONAL JOURNAL OF DRUG POLICY 2022; 104:103679. [PMID: 35427945 PMCID: PMC8977453 DOI: 10.1016/j.drugpo.2022.103679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/25/2022] [Accepted: 03/30/2022] [Indexed: 11/23/2022]
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