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Enhancing harvested rainwater quality through nanofiltration and storage practices in a rural community

   June 22, 2025  Leave a Comment on Enhancing harvested rainwater quality through nanofiltration and storage practices in a rural community

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Abstract

Water scarcity remains a persistent global challenge, particularly in rural communities where untreated harvested rainwater is often the primary source of water for domestic use. This study investigated cost-effective strategies to improve the quality of harvested rainwater in a selected rural community in South Africa. A sequential mixed-methods approach was adopted to explore the community’s existing rainwater harvesting practices, associated challenges, and perceptions of rainwater harvesting. The quantitative part of the study gathered data from 221 households through convenience sampling and was analysed using inferential statistics. The qualitative part of the study gathered insights from 16 interviews using convenience-based voluntary sampling and was analysed thematically. The results revealed that the majority of the households collected and stored rainwater using rooftop harvesting systems combined with plastic storage tanks. The harvested rainwater was primarily used for cooking, drinking, and cleaning. However, contamination from inadequate storage conditions, lack of filtration systems, and exposure to environmental pollutants frequently resulted in health-related concerns surfacing within the community. The study proposes using a simple wood-based nanofiltration system as a low-cost sustainable intervention to improve water quality. In addition, the study recommends promoting hygienic practices to reduce contamination risks and improving storage practices to preserve water quality. By advocating for accessible filtration technologies and encouraging safer water storage practices, the study contributes to the advancement of safe rainwater harvesting and sustainable water management in rural communities.

Authors

  • Raveen Rathilall (Durban University of Technology, South Africa)
  • Blessing George Akpan (Durban University of Technology, South Africa)

References

  1. Adam, A. M. (2020). Sample size determination in survey research. Journal of Scientific Research and Reports, 26(5), 90–97.
  2. Alim, M. A., Rahman, A., Tao, Z., Samali, B., Khan, M. M., & Shirin, S. (2020). Suitability of roof harvested rainwater for potential potable water production: A scoping review. Journal of Cleaner Production, 248, 119226. https://doi.org/10.1016/j.jclepro.2019.119226
  3. Anabtawi, F., Mahmoud, N., Al-Khatib, I. A., & Hung, Y. T. (2022). Heavy metals in harvested rainwater used for domestic purposes in rural areas: Yatta Area, Palestine as a case study. International Journal of Environmental Research and Public Health, 19(5), 2683. https://doi.org/10.3390/ijerph19052683
  4. Asenahabi, B. M. (2019). Basics of research design: A guide to selecting appropriate research design. International Journal of Contemporary Applied Research, 6(5), 76-89.
  5. Bae, S., Maestre, J. P., Kinney, K. A., & Kirisits, M. J. (2019). An examination of the microbial community and occurrence of potential human pathogens in rainwater harvested from different roofing materials. Water Research, 159, 406–413. https://doi.org/10.1016/j.watres.2019.05.029
  6. Chaurasiya, R., Chamoli, P., Ahmed, S., Vashisth, V., & Singh, D. (2019). PVC water tank & slurry cleaning machine. In IOP Conference Series: Materials Science and Engineering, 691(1), 012085. https://doi.org/10.1088/1757-899X/691/1/012085
  7. Creswell, J. W., & Creswell, J. D. (2018). Research design: Qualitative, quantitative, and mixed methods approaches. Sage Publications.
  8. Dao, D. A., Tran, S. H., Dang, H. T., Nguyen, V. A., Nguyen, V. A., Do, C. V., & Han, M. (2021). Assessment of rainwater harvesting and maintenance practice for better drinking water quality in rural areas. AQUA—Water Infrastructure, Ecosystems and Society, 70(2), 202-216. https://doi.org/10.2166/aqua.2021.076
  9. Das, M., Behera, S., Rath, A., Mishra, D. P., & Mishra, D. B. K. (2024). Rainwater harvesting for water conservation for utilisation of water for various purposes. IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT), 18(4), 09-12.
  10. Dawadi, S., Shrestha, S., & Giri, R. A. (2021). Mixed-methods research: A discussion on its types, challenges, and criticisms. Journal of Practical Studies in Education, 2(2), 25–36. https://doi.org/10.46809/jpse.v2i2.20
  11. Ertop, H., Koci?cka, J., Atilgan, A., Liberacki, D., Niemiec, M., & Rolbiecki, R. (2023). The importance of rainwater harvesting and its usage possibilities: Antalya example (Turkey). Water, 15(12), 2194. https://doi.org/10.3390/w15122194
  12. Fiorentino, A., Lofrano, G., Cucciniello, R., Carotenuto, M., Motta, O., Proto, A., & Rizzo, L. (2021). Disinfection of roof-harvested rainwater inoculated with E. coli and Enterococcus and post-treatment bacterial regrowth: Conventional vs. solar-driven advanced oxidation processes. Science of the Total Environment, 801, 149763. https://doi.org/10.1016/j.scitotenv.2021.149763
  13. Garcia-Avila, F., Guanoquiza-Suárez, M., Guzmán-Galarza, J., Cabello-Torres, R., & Valdiviezo-Gonzales, L. (2023). Rainwater harvesting and storage systems for domestic supply: An overview of research for water scarcity management in rural areas. Results in Engineering, 18, 101153. https://doi.org/10.1016/j.rineng.2023.101153
  14. Golzar, J., Noor, S., & Tajik, O. (2022). Convenience sampling. International Journal of Education & Language Studies, 1(2), 72–77. https://doi.org/10.22034/ijels.2022.162981
  15. He, X., Deng, H., & Hwang, H. M. (2019). The current application of nanotechnology in food and agriculture. Journal of Food and Drug Analysis, 27(1), 1-21. https://doi.org/10.1016/j.jfda.2018.12.002
  16. He, J., Shi, M., Wang, F., Duan, Y., Zhao, T., Shu, S., & Chu, W. (2020). Removal of CX3R-type disinfection by-product precursors from rainwater with conventional drinking water treatment processes. Water Research, 185, 116099. https://doi.org/10.1016/j.watres.2020.116099
  17. Jadhao, R. B., Jayant, V., Halyal, U. A., Yusuf, M., & Sharma, B. (2024). Water treatment using nanofiltration technology: A sustainable way towards contaminant removal from wastewater. Jabirian Journal of Biointerface Research in Pharmaceutics and Applied Chemistry, 1(2), 06-10. https://doi.org/10.55559/jjbrpac.v1i2.242
  18. Jason, L. A., So, S., Brown, A. A., Sunnquist, M., & Evans, M. (2015). Test–retest reliability of the DePaul Symptom Questionnaire. Fatigue: Biomedicine, Health & Behaviour, 3(1), 16–32. https://doi.org/10.1080/21641846.2014.978110
  19. John, C. K., Pu, J. H., Moruzzi, R., & Pandey, M. (2021). Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria. Journal of Water and Climate Change, 12(6), 2479–2494. https://doi.org/10.2166/wcc.2021.025
  20. Khayan, K., Heru Husodo, A., Astuti, I., Sudarmadji, S., & Sugandawaty Djohan, T. (2019). Rainwater as a source of drinking water: Health impacts and rainwater treatment. Journal of Environmental and Public Health, 2019(1), 1760950. https://doi.org/10.1155/2019/1760950
  21. Latif, S., Alim, M. A., & Rahman, A. (2022). Disinfection methods for domestic rainwater harvesting systems: A scoping review. Journal of Water Process Engineering, 46, 102542. https://doi.org/10.1016/j.jwpe.2021.102542
  22. Lebek, K., & Krueger, T. (2023). Conventional and makeshift rainwater harvesting in rural South Africa: Exploring determinants for rainwater harvesting mode. International Journal of Water Resources Development, 39(1), 113-132. https://doi.org/10.1080/07900627.2021.1983778
  23. Li, X. F., & Mitch, W. A. (2018). Drinking water disinfection byproducts (DBPs) and human health effects: Multidisciplinary challenges and opportunities. Environmental Science & Technology, 52(4), 1681-1689. https://doi.org/10.1021/acs.est.7b05440
  24. Madgundi, M. M., Kumbhar, A. P., Lele, G. M., Komble, S. P., Marane, Y. H., & Mate, A. R. (2023). Design and investigation on rain saucer: The technique of roofless rainwater harvesting. Materials Today: Proceedings, 72, 1084-1088. https://doi.org/10.1016/j.matpr.2022.09.169
  25. Mao, J., Xia, B., Zhou, Y., Bi, F., Zhang, X., Zhang, W., & Xia, S. (2021). Effect of roof materials and weather patterns on the quality of harvested rainwater in Shanghai, China. Journal of Cleaner Production, 279, 123419. https://doi.org/10.1016/j.jclepro.2020.123419
  26. Martínez-García, A., Oller, I., Vincent, M., Rubiolo, V., Asiimwe, J. K., Muyanja, C., McGuigan, K. G., Fernández-Ibáñez, P., & Polo-López, M. I. (2022). Meeting daily drinking water needs for communities in Sub-Saharan Africa using solar reactors for harvested rainwater. Chemical Engineering Journal, 428, 132494. https://doi.org/10.1016/j.cej.2021.132494
  27. Matimolane, S., Strydom, S., Mathivha, F. I., & Chikoore, H. (2023). Determinants of rainwater harvesting practices in rural communities of Limpopo Province, South Africa. Water Science, 37(1), 276-289. https://doi.org/10.1080/23570008.2023.2244784
  28. Mbua, R. L., Efande, S. E., & Sunjo, T. E. (2024). Health burden of the consumption of rooftop rainwater harvesting systems in Buea Sub-Division, Cameroon. Journal of Geography, Environment and Earth Science International, 28(5), 31-42.
  29. Mogano, M. M., & Okedi, J. (2023). Assessing the benefits of real-time control to enhance rainwater harvesting at a building in Cape Town, South Africa. Water SA, 49(3), 273-281. https://doi.org/10.17159/wsa/2023.v49.i3.3907
  30. Mohajan, H. K. (2017). Two criteria for good measurements in research: Validity and reliability. Annals of Spiru Haret University. Economic Series, 17(4), 59-82.
  31. Nolan-Cody, H., Phillips, K. E., & Scharp, K. M. (2024). Thematic analysis and thematic co-occurrence analysis: Teaching students to conduct qualitative research with depth. Communication Teacher, 38(4), 299–307. https://doi.org/10.1080/17404622.2024.2370452
  32. Nowell, L. S., Norris, J. M., White, D. E., & Moules, N. J. (2017). Thematic analysis: Striving to meet the trustworthiness criteria. International Journal of Qualitative Methods, 16(1), 1-13. https://doi.org/10.1177/1609406917733847
  33. Nwachukwu, M. I., Ihenetu, F. C., & Obasi, C. C. (2024). Effect of different storage vessels on the microbiological and physicochemical properties of rainwater harvested from different rooftops in Owerri, Nigeria. International Journal of Environment and Climate Change, 14(3), 1-16.
  34. Nwogu, F. U., Ubuoh, E. A., & Kanu, S. C. (2024). Chemical characteristics and microbiological loads of harvested rainwater run-off from rooftops in South Eastern Nigeria. Discover Sustainability, 5(1), 4. https://doi.org/10.1007/s43621-023-00177-z
  35. Nwokediegwu, Z. Q. S., Adefemi, A., Ayorinde, O. B., Ilojianya, V. I., & Etukudoh, E. A. (2024). Review of water policy and management: Comparing the USA and Africa. Engineering Science & Technology Journal, 5(2), 402-411. https://doi.org/10.51594/estj.v5i2.802
  36. Osayemwenre, G., & Osibote, O. A. (2021). A review of health hazards associated with rainwater harvested from green, conventional and photovoltaic rooftops. International Journal of Environmental Science and Development, 12(10), 289–303. https://doi.org/10.18178/ijesd.2021.12.10.1353
  37. Owusu, S., & Asante, R. (2020). Rainwater harvesting and primary uses among rural communities in Ghana. Journal of Water, Sanitation and Hygiene for Development, 10(3), 502–511. https://doi.org/10.2166/washdev.2020.059
  38. Raimondi, A., Quinn, R., Abhijith, G. R., Becciu, G., & Ostfeld, A. (2023). Rainwater harvesting and treatment: State of the art and perspectives. Water, 15(8), 1518. https://doi.org/10.3390/w15081518
  39. Ross, T. T., Alim, M. A., & Rahman, A. (2022). Community-scale rural drinking water supply systems based on harvested rainwater: A case study of Australia and Vietnam. Water, 14(11), 1763. https://doi.org/10.3390/w14111763
  40. Sainani, K. L. (2017). Reliability statistics. Physical Medicine and Rehabilitation, 9(6), 622-628. https://doi.org/10.1016/j.pmrj.2017.05.001
  41. Sanchez-Ferrer, A., & Guerrero Parra, J. (2025). Exploring wood as a sustainable solution for water filtration: Nanoparticle removal, size exclusion, and molecular adsorption. Wood Science and Technology, 59(3), 42. https://doi.org/10.1007/s00226-025-01645-7
  42. Sharma, R. (2021, April). Nanotechnology: An approach for water purification-review. In IOP Conference Series: Materials Science and Engineering, 1116(1), 012007. https://doi.org/10.1088/1757-899X/1116/1/012007
  43. Singh, S., Yadav, R., Kathi, S., & Singh, A. N. (2022). Treatment of harvested rainwater and reuse: Practices, prospects, and challenges. Cost Effective Technologies for Solid Waste and Wastewater Treatment, 161–178. https://doi.org/10.1016/B978-0-12-822933-0.00003-6
  44. Subedi, K. R. (2021). Determining the sample in qualitative research. Scholars Journal, 4, 1-13.
  45. Tengan, B. M., & Akoto, O. (2022). Comprehensive evaluation of the possible impact of roofing materials on the quality of harvested rainwater for human consumption. Science of the Total Environment, 819, 152966. https://doi.org/10.1016/j.scitotenv.2022.152966
  46. Turhan, N. S. (2020). Karl Pearson’s Chi-Square tests. Educational Research and Reviews, 16(9), 575-580.
  47. Umukiza, E., Ntole, R., Chikavumbwa, S. R., Bwambale, E., Sibale, D., Jeremaih, Z., Apollonio, C., & Petroselli, A. (2023). Rainwater harvesting in arid and semi-arid lands of Africa: Challenges and opportunities. Acta Scientiarum Polonorum. Formatio Circumiectus, 22(2), 41-52. https://doi.org/10.15576/ASP.FC/2023.22.2.03
  48. Zhang, X., Xia, S., Ye, Y., & Wang, H. (2021). Opportunistic pathogens exhibit distinct growth dynamics in rainwater and tap water storage systems. Water Research, 204, 117581. https://doi.org/10.1016/j.watres.2021.117581
  49. Zhang, Z., Li, H., Cui, J., Yang, Z., Hou, R., Ju, Y., Lu, X., & Chen, F. (2023). Covalent organic framework-immobilised wood membrane for efficient, durable, and high-flux nanofiltration. Journal of Cleaner Production, 384, 135595. https://doi.org/10.1016/j.jclepro.2022.135595
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