From Local Resources to Safe Water: Circular Approaches for Decentralized Water Treatment

Karla F.     Solis; Carlos    Rueda-Panchano

doi:10.47606/ACVEN/PH0607

Autores/as

Karla F. Solis Pontificia Universidad Católica del Ecuador, Ecuador. Facultad de Ingeniería Mecánica y Ciencias de la Producción, Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo. Ecuador https://orcid.org/0000-0002-9668-9695
Carlos Rueda-Panchano Universidad Técnica Luis Vargas Torres de Esmeraldas (UTELVT), Facultad de Ingenierías Campus Nuevos Horizontes, Ecuador. https://orcid.org/0000-0001-5067-6277

DOI:

https://doi.org/10.47606/ACVEN/PH0607

Palabras clave:

cocoa pod husk, adsorption;, natural zeolites, activated carbon, household filtration

Resumen

Access to safe water remains a challenge in low-income and rural regions, where conventional purification can be unaffordable or unsustainable. Cocoa production waste, particularly cocoa pod husk, can be valorized as a precursor of activated carbon, while natural zeolites provide a complementary adsorptive and ion-exchange medium. This bibliometric review, complemented by a qualitative narrative synthesis, examines circular-economy strategies based on locally available adsorbent materials for decentralized water treatment. Bibliographic records were retrieved from Scopus using a structured search strategy and screened according to predefined eligibility criteria. A final corpus of 472 articles published between 2016 and 2026 was analyzed in VOSviewer using fractional counting and complementary Author Keywords and All Keywords co-occurrence networks. The reviewed evidence indicates complementary removal mechanisms and suggests that hybrid integration may improve efficiency, durability, and regeneration while valorizing agricultural residues and locally available minerals. The synthesis considers adsorption capacity, empty-bed contact time, removal targets, regeneration, and hydraulic performance. Important gaps remain regarding variable pH, competing ions, long-term stability, scale-up, reproducibility, and community adoption. The evidence supports a methodological pathway based on optimizing cocoa-residue activation, integrating the resulting carbon with zeolite media, and evaluating hybrid filters under realistic laboratory and field conditions. Within a circular-economy framework, this approach may contribute to locally grounded, low-cost drinking-water solutions for rural communities.

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Citas

Ackley, M. W., Rege, S. U., & Saxena, H. (2003). Application of natural zeolites in the purification and separation of gases. Microporous and Mesoporous Materials, 61(1–3), 25–42. https://doi.org/10.1016/S1387-1811(03)00353-6

Aguilar-Rosero, J., Urbina-López, M. E., Rodríguez-González, B. E., León-Villegas, S. X., Luna-Cruz, I. E., & Cárdenas-Chávez, D. L. (2022). Development and characterization of bioadsorbents derived from different agricultural wastes for water reclamation: A review. Applied Sciences, 12(5), Article 2740. https://doi.org/10.3390/app12052740

Ciawi, Y., & Khoiruddin, K. (2024). Low-cost antibacterial ceramic water filters for decentralized water treatment: Advances and practical applications. ACS Omega, 9(11), 12457–12477. https://doi.org/10.1021/acsomega.3c09311

Cruz, G., Pirilä, M., Huuhtanen, M., Carrión, L., Alvarenga, E., & Keiski, R. L. (2012). Production of activated carbon from cocoa (Theobroma cacao) pod husk. Journal of Civil & Environmental Engineering, 2(2), Article 109. https://doi.org/10.4172/2165-784X.1000109

de Souza Vandenberghe, L. P., Valladares-Diestra, K. K., Bittencourt, G. A., de Mello, A. F. M., Vásquez, Z. S., de Oliveira, P. Z., de Melo Pereira, G. V., & Soccol, C. R. (2022). Added-value biomolecules’ production from cocoa pod husks: A review. Bioresource Technology, 344, Article 126252. https://doi.org/10.1016/j.biortech.2021.126252

Garrido-Baserba, M., Sedlak, D. L., Molinos-Senante, M., Barnosell, I., Schraa, O., Rosso, D., Verdaguer, M., & Poch, M. (2024). Using water and wastewater decentralization to enhance the resilience and sustainability of cities. Nature Water, 2(10), 953–974. https://doi.org/10.1038/s44221-024-00303-9

Halim, A. A., Aziz, H. A., Megat Johari, M. A., & Ariffin, K. S. (2010). Comparison study of ammonia and COD adsorption on zeolite, activated carbon and composite materials in landfill leachate treatment. Desalination, 262(1–3), 31–35. https://doi.org/10.1016/j.desal.2010.05.036

Hedström, A. (2001). Ion exchange of ammonium in zeolites: A literature review. Journal of Environmental Engineering, 127(8), 673–681. https://doi.org/10.1061/(ASCE)0733-9372(2001)127:8(673)

International Cocoa Organization. (n.d.). Data on production and grindings of cocoa beans. Retrieved October 19, 2026, from https://www.icco.org/statistics/statistics_2025/

Jjagwe, J., Olupot, P. W., Menya, E., & Kalibbala, H. M. (2021). Synthesis and application of granular activated carbon from biomass waste materials for water treatment: A review. Journal of Bioresources and Bioproducts, 6(4), 292–322. https://doi.org/10.1016/j.jobab.2021.03.003

Koul, B., Yakoob, M., & Shah, M. P. (2022). Agricultural waste management strategies for environmental sustainability. Environmental Research, 206, Article 112285. https://doi.org/10.1016/j.envres.2021.112285

Kumari, S., Chowdhry, J., Kumar, M., & Garg, M. C. (2024). Zeolites in wastewater treatment: A comprehensive review on scientometric analysis, adsorption mechanisms, and future prospects. Environmental Research, 260, Article 119782. https://doi.org/10.1016/j.envres.2024.119782

Machiels, L., Morante, F., Snellings, R., Calvo, B., Canoira, L., Paredes, C., & Elsen, J. (2008). Zeolite mineralogy of the Cayo formation in Guayaquil, Ecuador. Applied Clay Science, 42(1–2), 180–188. https://doi.org/10.1016/j.clay.2008.01.012

Magbondé, K. G., Thiam, D. R., & Wagner, N. (2024). The economic impacts of rural water supply infrastructures in developing countries: Empirical evidence from Senegal. Environmental and Resource Economics, 87(10), 2571–2628. https://doi.org/10.1007/s10640-024-00897-4

Martínez Moscoso, A., Aguilar Feijó, V. G., & Verdugo Silva, T. (2018). The vital minimum amount of drinking water required in Ecuador. Resources, 7(1), Article 15. https://doi.org/10.3390/resources7010015

Morante Carballo, F. E. (2004). Las zeolitas de la costa de Ecuador (Guayaquil): Geología, caracterización y aplicaciones [Tesis doctoral, Universidad Politécnica de Madrid]. Archivo Digital UPM. https://doi.org/10.20868/UPM.thesis.740

Morante-Carballo, F., Montalván-Burbano, N., Carrión-Mero, P., & Espinoza-Santos, N. (2021). Cation exchange of natural zeolites: Worldwide research. Sustainability, 13(14), Article 7751. https://doi.org/10.3390/su13147751

Nidheesh, P. V., Kumar, M., Venkateshwaran, G., Ambika, S., Bhaskar, S., Vinay, & Ghosh, P. (2024). Conversion of locally available materials to biochar and activated carbon for drinking water treatment. Chemosphere, 353, Article 141566. https://doi.org/10.1016/j.chemosphere.2024.141566

Organisation for Economic Co-operation and Development. (2025). The circular water economy in Latin America (OECD Urban Studies). https://doi.org/10.1787/a0508572-en

Patel, M. R., & Panwar, N. L. (2023). Biochar from agricultural crop residues: Environmental, production, and life cycle assessment overview. Resources, Conservation & Recycling Advances, 19, Article 200173. https://doi.org/10.1016/j.rcradv.2023.200173

Pérez-Botella, E., Valencia, S., & Rey, F. (2022). Zeolites in adsorption processes: State of the art and future prospects. Chemical Reviews, 122(24), 17647–17695. https://doi.org/10.1021/acs.chemrev.2c00140

Roshanfekr Rad, L., & Anbia, M. (2021). Zeolite-based composites for the adsorption of toxic matters from water: A review. Journal of Environmental Chemical Engineering, 9(5), Article 106088. https://doi.org/10.1016/j.jece.2021.106088

Snyder, H. (2019). Literature review as a research methodology: An overview and guidelines. Journal of Business Research, 104, 333–339. https://doi.org/10.1016/j.jbusres.2019.07.039

Stavropoulos, G. G., & Zabaniotou, A. A. (2009). Minimizing activated carbons production cost. Fuel Processing Technology, 90(7–8), 952–957. https://doi.org/10.1016/j.fuproc.2009.04.002

Susilawati, Sihombing, Y. A., Rahayu, S. U., Sembiring, Y. Y. B., Waldiansyah, L., & Irma, M. (2023). Filter material based on zeolite-activated charcoal from cocoa shells as ammonium adsorbent in greywater treatment. South African Journal of Chemical Engineering, 43, 266–272. https://doi.org/10.1016/j.sajce.2022.11.006

Susilawati, Sihombing, Y. A., Rahayu, S. U., Waldiansyah, L., & Sembiring, Y. Y. B. (2022). The effectiveness of Pahae natural zeolite–cocoa shell activated charcoal nanofilter as a water adsorber in bioethanol purification. ACS Omega, 7(43), 38417–38425. https://doi.org/10.1021/acsomega.2c03614

Susilawati, S., Rizki, A. R., & Irma, M. (2024). Preparation and characterization of cocoa shell–Pahae natural zeolite as a metal adsorption material for iron (Fe) and manganese (Mn) in water. Journal of Physics: Conference Series, 2733(1), Article 012006. https://doi.org/10.1088/1742-6596/2733/1/012006

United Nations Children’s Fund, & World Health Organization. (2023). Progress on household drinking water, sanitation and hygiene 2000–2022: Special focus on gender. https://data.unicef.org/resources/jmp-report-2023/

UN-Water. (2023). Blueprint for acceleration: Sustainable Development Goal 6 synthesis report on water and sanitation 2023 .https://www.unwater.org/sites/default/files/2023-08/UN-Water_SDG6_SynthesisReport_2023.pdf

Wainaina, G. K., Ochieng, F., Peter, M., Raude, J. M., Meierhofer, R., & Marks, S. J. (2023). Determinants of consistency of use of household water filters in emergencies: Insights from a protracted drought in Northern Kenya. PLOS Water, 2(6), Article e0000093. https://doi.org/10.1371/journal.pwat.0000093

Wan, C., Xie, Q., Liu, J., Liang, D., Huang, X., Zhou, H., Tang, Y., & Liu, D. (2021). Pilot-scale combined adsorption columns using activated carbon and zeolite for hazardous trace elements removal from wastewater of entrained-flow coal gasification. Process Safety and Environmental Protection, 147, 439–449. https://doi.org/10.1016/j.psep.2020.09.053

Wang, S., & Peng, Y. (2010). Natural zeolites as effective adsorbents in water and wastewater treatment. Chemical Engineering Journal, 156(1), 11–24. https://doi.org/10.1016/j.cej.2009.10.029

World Bank. (2023, March 21). Water matters: It's time for water action in Latin America and Caribbean. https://www.worldbank.org/en/news/immersive-story/2023/03/21/time-for-water-action-in-latin-america-and-caribbean

World Bank Water Practice. (2024). Making the economic and financial case for circular projects in water. World Bank.https://thedocs.worldbank.org/en/doc/553c323db2132d2ee349da34a88a388b-0320082024/original/2024-03-06-WICER-Economic-and-Financial.pdf