Recreational activities as a major source of microplastics in aquatic environments

Abstract

Microplastics (MPs) have been extensively studied in the marine environment in recent years, but their occurrence in recreational waters, and recreational activities as a source of MPs, have been less explored. In this study, we investigate the temporal variation of MPs in the Salt River, a natural surface waterway heavily used for recreation, and in community swimming pools in nearby Tempe, Arizona. Samples were processed using established methodologies and MP shapes and number concentrations were obtained by optical microscopy. The MP concentrations in samples of surface water collected during recreational activity ranged from 27,798 to 222,391 MPs/m³, with the highest concentrations occurring at 16:00 and lowest at 8:00, consistent with recreational activities. Fibers were the dominant shape (≥ 71%) of MPs overall in the Salt River, accounting for as much as 96% of all MPs at peak activity time (16:00). MP concentrations in water samples from apartment community swimming pools ranged from 59,160 to 254,574 MPs/m³. In terms of shape, fibers were again dominant (sometimes as high as 87%) in these water samples. Raman spectroscopic characterization of the MPs revealed the presence of polyethylene (PE), polyvinyl chloride (PVC), polyester (PES), polyamide (PA), and polypropylene (PP), showing a larger variety of polymers in the pool samples, while more MP pieces remained chemically unidentifiable. The prevalence of PES and PA fibers indicates that release from synthetic fabrics such as swimwear is a substantial source of MPs in the environment.

Keywords

Microplastics / Salt River / Arizona / swimming pools / polymer composition / weathering

References

[1] Geyer R,Law KL.Production, use, and fate of all plastics ever made.Sci Adv2017;3:e1700782 PMCID:PMC5517107

[2] Zhao H,Han Y.Pollution status of microplastics in the freshwater environment of China: a mini review.Water Emerg Contam Nanoplastics2022;1:5

[3] Bhatia SK,Yang YH.Understanding microplastic pollution: tracing the footprints and eco-friendly solutions.Sci Total Environ2024;914:169926

[4] Pomata D,Biale G.Plastic breath: quantification of microplastics and polymer additives in airborne particles.Sci Total Environ2024;932:173031

[5] Arthur C,Bamford HA. Proceedings of the International Research Workshop on the Occurrence, Effects and Fate of Microplastic Marine Debris, September 9-11, 2008. University of Washington Tacoma, Tacoma, WA, USA. 2009. Available from: https://repository.library.noaa.gov/view/noaa/2509. [Last accessed on 9 Sep 2024]

[6] Turner A,Arnold R.Identification, origin and characteristics of bio-bead microplastics from beaches in western Europe.Sci Total Environ2019;664:938-47

[7] Tran TV,Nguyen TM,Nabgan W.A review on the occurrence, analytical methods, and impact of microplastics in the environment.Environ Toxicol Pharmacol2023;102:104248

[8] Peller JR,Babu BG,Kostelnik E.A review of microplastics in freshwater environments: locations, methods, and pollution loads. In: Ahuja S, Loganathan BG, editors. Contaminants in our water: identification and remediation methods. Washington: American Chemical Society; 2020. pp. 65-90.

[9] Rebelein A,Kammann U.Microplastic fibers - underestimated threat to aquatic organisms?.Sci Total Environ2021;777:146045

[10] Ali AAM,Razak NIA.A review on the presence of microplastics in environmental matrices within Southeast Asia: elucidating risk information through an analysis of microplastic characteristics such as size, shape, and type.Water Emerg Contam Nanoplastics2024;3:12

[11] Andrady AL.Microplastics in the marine environment.Mar Pollut Bull2011;62:1596-605

[12] Bordós G,Micsinai A.Identification of microplastics in fish ponds and natural freshwater environments of the Carpathian basin, Europe.Chemosphere2019;216:110-6

[13] Yuan W,Wang W,Wang J.Microplastic abundance, distribution and composition in water, sediments, and wild fish from Poyang Lake, China.Ecotoxicol Environ Saf2019;170:180-7

[14] Li C,Campos LC.Assessment of microplastics in freshwater systems: a review.Sci Total Environ2020;707:135578

[15] Xu S,Ji R,Miao AJ.Microplastics in aquatic environments: occurrence, accumulation, and biological effects.Sci Total Environ2020;703:134699

[16] Abbasi S.Sources, concentrations, distributions, fluxes and fate of microplastics in a hypersaline lake: Maharloo, south-west Iran.Sci Total Environ2022;823:153721

[17] Esfandiari A,Peely AB.Distribution and transport of microplastics in groundwater (Shiraz aquifer, southwest Iran).Water Res2022;220:118622

[18] Ginebreda A.Emerging contaminants and nanoplastics in the water environment: a matter of rising concern.Water Emerg Contam Nanoplastics2022;1:1

[19] Picó Y,Soursou V.Microplastics in water, from treatment process to drinking water: analytical methods and potential health effects.Water Emerg Contam Nanoplastics2022;1:13

[20] Leterme SC,Drummond WJ,Gascooke JR.Microplastics in urban freshwater streams in Adelaide, Australia: a source of plastic pollution in the Gulf St Vincent.Sci Total Environ2023;856:158672

[21] Eberhard T,Zarus GM.Systematic review of microplastics and nanoplastics in indoor and outdoor air: identifying a framework and data needs for quantifying human inhalation exposures.J Expo Sci Environ Epidemiol2024;34:185-96 PMCID:PMC11142917

[22] Prata JC,da Costa JP,Rocha-Santos T.The importance of contamination control in airborne fibers and microplastic sampling: experiences from indoor and outdoor air sampling in Aveiro, Portugal.Mar Pollut Bull2020;159:111522

[23] Giechaskiel B,Mathissen M.Contribution of road vehicle tyre wear to microplastics and ambient air pollution.Sustainability2024;16:522

[24] Abbasi S.Dry and wet deposition of microplastics in a semi-arid region (Shiraz, Iran).Sci Total Environ2021;786:147358

[25] Chandrakanthan K,Herckes P.Airborne microplastics in a suburban location in the desert southwest: occurrence and identification challenges.Atmos Environ2023;298:119617

[26] Liu S,Men Z.Spatial distribution, source apportionment and potential ecological risk assessment of suspended atmosphere microplastics in different underlying surfaces in Harbin.Sci Total Environ2023;901:166040

[27] Zhao X,Liang C.Airborne microplastics: occurrence, sources, fate, risks and mitigation.Sci Total Environ2023;858:159943

[28] Abbasi S,Khodabakhshloo N.Atmospheric deposition of microplastics in Shiraz, Iran.Atmos Pollut Res2024;15:101977

[29] Din K, Khokhar MF, Butt SI, Qadir A, Younas F. Exploration of microplastic concentration in indoor and outdoor air samples: morphological, polymeric, and elemental analysis.Sci Total Environ2024;908:168398

[30] Scheurer M.Microplastics in Swiss Floodplain Soils.Environ Sci Technol2018;52:3591-8

[31] Zhang GS.The distribution of microplastics in soil aggregate fractions in southwestern China.Sci Total Environ2018;642:12-20

[32] Abbasi S,Hoseini M.Microplastics in the Lut and Kavir Deserts, Iran.Environ Sci Technol2021;55:5993-6000

[33] Chandrakanthan K,Herckes P.Microplastics are ubiquitous and increasing in soil of a sprawling urban area, Phoenix (Arizona).Sci Total Environ2024;906:167617

[34] Palazot M,Froger C.First national reference of microplastic contamination of French soils.Sci Total Environ2024;918:170564

[35] Liu B,Zhou Q.Microplastics in soil aggregates: analytical methods, occurrence patterns, impact analyses and removal approaches.TrAC Trend Anal Chem2024;178:117855

[36] Lambert S.Microplastics are contaminants of emerging concern in freshwater environments: an overview. In: Wagner M, Lambert S, editors. Freshwater microplastics. Cham: Springer International Publishing; 2018. pp. 1-23.

[37] Eerkes-Medrano D,Aldridge DC.Microplastics in freshwater systems: a review of the emerging threats, identification of knowledge gaps and prioritisation of research needs.Water Res2015;75:63-82

[38] Gatidou G,Stasinakis AS.Review on the occurrence and fate of microplastics in Sewage Treatment Plants.J Hazard Mater2019;367:504-12

[39] Phuong NN,Le TPQ.Microplastics in Asian freshwater ecosystems: current knowledge and perspectives.Sci Total Environ2022;808:151989

[40] Gomiero A,Jaén-gil A,Skogerbø G.To what extent are wastewater treatment systems a gateway for microplastic particles in the aquatic and terrestrial environments?.Water Emerg Contam Nanoplastics2024;3:13

[41] Koelmans AA,Hermsen E,Mintenig SM.Microplastics in freshwaters and drinking water: critical review and assessment of data quality.Water Res2019;155:410-22 PMCID:PMC6449537

[42] Claessens M,Van Landuyt L,Janssen CR.Occurrence and distribution of microplastics in marine sediments along the Belgian coast.Mar Pollut Bull2011;62:2199-204

[43] Stolte A,Gerdts G.Microplastic concentrations in beach sediments along the German Baltic coast.Mar Pollut Bull2015;99:216-29

[44] Karthik R,Purvaja R.Microplastics along the beaches of southeast coast of India.Sci Total Environ2018;645:1388-99

[45] Barboza LGA,Lavorante BRBO,Guilhermino L.Marine microplastic debris: an emerging issue for food security, food safety and human health.Mar Pollut Bull2018;133:336-48

[46] O’Brien S,O’Brien JW.Airborne emissions of microplastic fibres from domestic laundry dryers.Sci Total Environ2020;747:141175

[47] Soltani N,Keshavarzi B.Microplastic occurrence in selected aquatic species of the Persian Gulf: no evidence of trophic transfer or effect of diet.Sci Total Environ2023;892:164685

[48] Pinlova B.Characterization of fiber fragments released from polyester textiles during UV weathering.Environ Pollut2023;322:121012

[49] O’Loughlin C.The impact of activewear/swimwear laundering: investigating microplastic-fibre emissions from recycled and non-recycled synthetic textiles.J Home Econ Inst Aust2018;25:2-12Available from: https://search.informit.org/doi/10.3316/ielapa.107251401188651. [Last accessed on 9 Sep 2024]

[50] Rathinamoorthy R,Madhubashini S,Rakshana JB.Investigation on microfiber release from elastane blended fabrics and its environmental significance.Sci Total Environ2023;903:166553

[51] Imhof HK,Schmid J,Laforsch C.Contamination of beach sediments of a subalpine lake with microplastic particles.Curr Biol2013;23:R867-8

[52] D’Avignon G,Ricciardi A.Microplastics in lakes and rivers: an issue of emerging significance to limnology.Environ Rev2022;30:228-44

[53] Costigan E,Hatinoglu MD.Adsorption of organic pollutants by microplastics: overview of a dissonant literature.J Hazard Mater Adv2022;6:100091

[54] Whiting QT,Potter PM.A high-throughput, automated technique for microplastics detection, quantification, and characterization in surface waters using laser direct infrared spectroscopy.Anal Bioanal Chem2022;414:8353-64 PMCID:PMC9805365

[55] Hatinoglu MD,Apul OG.Modified linear solvation energy relationships for adsorption of perfluorocarboxylic acids by polystyrene microplastics.Sci Total Environ2023;860:160524

[56] Schets FM,de Roda Husman AM.Exposure assessment for swimmers in bathing waters and swimming pools.Water Res2011;45:2392-400

[57] Ramírez-Castillo FY,Jacques M.Waterborne pathogens: detection methods and challenges.Pathogens2015;4:307-34 PMCID:PMC4493476

[58] Albarano L,La Marca A.Risk assessment of natural and synthetic fibers in aquatic environment: a critical review.Sci Total Environ2024;934:173398

[59] Chiu CA,Herckes P,Elliott G. Monitoring of trace-level pharmaceuticals and personal care products in Salt River Project Waters Final Report. 2009. Available from: https://www.researchgate.net/publication/383877016_Monitoring_of_Trace-Level_Pharmaceuticals_and_Personal_Care_Products_in_Salt_River_Project_Waters_Final_Report_Submitted_to_Salt_River_Project. [Last accessed on 9 Sep 2024]

[60] Banville MJ.Urban and wildland herpetofauna communities and riparian microhabitats along the Salt River, Arizona.Urban Ecosyst2012;15:473-88

[61] Yang Y,Schoepf J,Herckes P.Prospecting nanomaterials in aqueous environments by cloud-point extraction coupled with transmission electron microscopy.Sci Total Environ2017;584-5:515-22

[62] Venkatesan AK,Lee S.Detection and sizing of Ti-containing particles in recreational waters using single particle ICP-MS.Bull Environ Contam Toxicol2018;100:120-6

[63] Metcalfe AN,Ford MA.Chapter 11 - Colorado River Basin. In: Rivers of North America. Elsevier; 2023. pp. 462-509.

[64] Masura J,Foster G. Laboratory methods for the analysis of microplastics in the marine environment: recommendations for quantifying synthetic particles in waters and sediments. 2015. Available from: https://repository.oceanbestpractices.org/handle/11329/1076. [Last accessed on 9 Sep 2024]

[65] Dawson AL,Nelis JLD.Taking control of microplastics data: a comparison of control and blank data correction methods.J Hazard Mater2023;443:130218

[66] Hidalgo-Ruz V,Thompson RC.Microplastics in the marine environment: a review of the methods used for identification and quantification.Environ Sci Technol2012;46:3060-75

[67] Baldwin AK,Rosen MR.Microplastics in Lake Mead National Recreation Area, USA: occurrence and biological uptake.PLoS One2020;15:e0228896 PMCID:PMC7197774

[68] Baldwin AK,Mason SA,Kim LH. Data release for microplastics in water, sediment, fish, and mussels in the St. Croix National Scenic Riverway and Mississippi National River and Recreation Area, Wisconsin and Minnesota, 2015. 2017. Available from: https://www.usgs.gov/data/data-release-microplastics-water-sediment-fish-and-mussels-st-croix-national-scenic-riverway. [Last accessed on 9 Sep 2024]

[69] Moore CJ,Zellers AF.Quantity and type of plastic debris flowing from two urban rivers to coastal waters and beaches of Southern California.RGCI2011;11:65-73

[70] Inland Ocean Coalition. Pilot study finds evidence of microplastics in Colorado’s headwater stream. Available from: https://inlandoceancoalition.org/learn/plastic/microplastics-working-group/. [Last accessed on 9 Sep 2024]

[71] Mallik A,Naidu BC.Ecotoxicological and physiological risks of microplastics on fish and their possible mitigation measures.Sci Total Environ2021;779:146433

[72] Hu E,Yang F.Microplastics in 48 wastewater treatment plants reveal regional differences in physical characteristics and shape-dependent removal in the transition zone between North and South China.Sci Total Environ2022;834:155320

[73] Shamskhany A,Patel P.Evidence of microplastic size impact on mobility and transport in the marine environment: a review and synthesis of recent research.Front Mar Sci2021;8:760649

[74] Napper IE.Release of synthetic microplastic plastic fibres from domestic washing machines: effects of fabric type and washing conditions.Mar Pollut Bull2016;112:39-45

[75] Thacharodi A,Hassan S.Microplastics in the environment: a critical overview on its fate, toxicity, implications, management, and bioremediation strategies.J Environ Manage2024;349:119433

[76] Martin J,Thompson RC.The deposition and accumulation of microplastics in marine sediments and bottom water from the Irish Continental Shelf.Sci Rep2017;7:10772 PMCID:PMC5589889

[77] Wood M,MacAdam J,Jarvis P.Role of filtration in managing the risk from Cryptosporidium in commercial swimming pools - a review.J Water Health2019;17:357-70

[78] United States EPA-832-F-22-015. Jump into pool water efficiency. 2022. Available from: https://www.epa.gov/system/files/documents/2022-09/ws-outdoor-pool-guide.pdf. [Last accessed on 9 Sep 2024]

[79] Cisco J. The fate of microplastics in tres rios, a constructed treatment wetland. 2023. Available from: https://keep.lib.asu.edu/system/files/c7/Cisco_asu_0010N_22995.pdf. [Last accessed on 9 Sep 2024]

[80] Carr SA.Sources and dispersive modes of micro-fibers in the environment.Integr Environ Assess Manag2017;13:466-9

[81] Chandrakanthan K. Microplastics in the Desert Southwest: occurrence and characterization in atmospheric, aquatic, and terrestrial environments. 2024. Available from: https://keep.lib.asu.edu/system/files/c7/Chandrakanthan_asu_0010E_23729.pdf. [Last accessed on 9 Sep 2024]