Combination of Biochar and Polyurethane Media in a Series-Connected Filtration Column for Microplastic Removal and Effluent Toxicity Testing
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Coconut Shell Biochar, Filter, Microplastics, Nile Tilapia, Polyurethane Sponge
Abstract
This study aimed to evaluate the efficiency of microplastic removal using filtration media composed of coconut shell biochar and polyurethane sponge, as well as to assess the potential toxicity of the filtered water on feed consumption efficiency in Oreochromis niloticus and microplastic bioaccumulation by fish. The filtration system had a diameter of 10 cm, employed an upward flow configuration, and operated at a flow rate of 30 mL/min. Optimization was conducted using an artificial solution containing microplastics through two series-connected filtration columns with a media thickness of 40 cm. Toxicity tests on the filtered water were performed on Nile tilapia using feed efficiency and the fish’s bioaccumulation capacity of microplastics as parameters, with fish sized 4-5 cm. Results showed that the highest microplastic removal efficiency for the first and second filter averaged 79% and 93%, respectively. Toxicity tests based on feed efficiency showed favorable percentages in experiments using the effluent from the second series column filter compared to the first series, even though the fish feed efficiency of both water effluent decreased on day 14. The highest microplastic accumulation was observed in the digestive tract, followed by the fish gill and fish muscle, respectively. The bioaccumulation factor (BAF) value of microplastic in fish was less than 1, indicating a low level of bioaccumulation. This study demonstrates that the combination of coconut shell biochar and polyurethane sponge in two series of filtration has strong potential as an effective, economical, and accessible solution for microplastic filtration in water treatment.
References
Atamanalp, M., M. Köktürk, A. Uçar, H. A. Duyar, S. Özdemir, V. Parlak, N. Esenbu?a, and G. Alak (2021). Microplastics in Tissues (Brain, Gill, Muscle and Gastrointestinal) of Mullus barbatus and Alosa immaculata. Archives of Environmental Contamination and Toxicology, 81(3); 460–469.
Badiger, S. and P. V. Nidheesh (2024). Coconut Shell Biochar for the Removal of Acetaminophen and Ciprofloxacin in Low Concentrations: Single and Competitive Adsorption Studies. Industrial & Engineering Chemistry Research, 63(44); 19120–19134.
Bautista Quispe, J. I., L. C. Campos, O. Mašek, and A. Bogush (2024). Removal of Anionic Surfactant from Aqueous Solutions by Adsorption onto Biochars: Characterisation, Kinetics, and Mechanism. Environmental Technology, 45(26); 5723–5744.
Changlor, N., C. Inchana, M. A. Sabar, B. Suyamud, and J. Lohwacharin (2025). Effects of Relative Microplastic–Biochar Sizes and Biofilm Formation on Fragmental Microplastic Retention in Biochar Filters. Environmental Research, 268; 120834.
Conesa, J. A. (2022). Adsorption of PAHs and PCDD/Fs in Microplastics: A Review. Microplastics, 1(3); 346–358.
Edwin, T., P. S. Komala, M. Mera, Z. Zulkarnaini, and Z. Jamil (2025a). Coconut Shell Biochar as a Sustainable Approach for Nutrient Removal from Agricultural Wastewater. Journal of Water and Land Development, 65; 177–184.
Edwin, T., M. Mera, P. S. Komala, Z. Zulkarnaini, and A. S. Nabila (2024). Penyisihan Nitrat Menggunakan Kolom dengan Media Biochar dan Busa Poliuretan. DAMPAK, 21(2); 1–6. (In Indonesian).
Edwin, T., B. Primasari, and A. Purnama R (2023). Characterization of Microplastic in Trawl Fish Caught in Padang City (Indonesia) Coastal Area. Biodiversitas Journal of Biological Diversity, 24(1); 516.
Edwin, T., Z. Zulkarnaini, B. Primasari, P. Sri Komala, F. Hannum Nst, and S. Najwa (2025b). Biochar Filter Performance with Serial Columns for Surfactant Removal from Irrigation Water and Filter Toxicity to Tilapia Fish. IOP Conference Series: Earth and Environmental Science, 1542(1); 012013.
Oreochromis niloticus El-Sherif, M. S. and A. M. I. El-Feky (2009). Performance of Nile Tilapia (Oreochromis niloticus) Fingerlings. II. Influence of Different Water Temperatures. International Journal of Agriculture and Biology, 11(3); 301–305.
Elawady, A., J. A. Hassan Mohamed, and M. B. Abid (2026). Advancements in Microplastics Detection Techniques and Their Multidimensional Impacts on Aquatic Ecosystems and Human Health. Journal of Hazardous Materials: Plastics, 2; 100025.
Hossain, M. B., F. H. Pingki, M. A. S. Azad, A.-A. U. Nur, P. Banik, P. K. Sarker, B. A. Paray, T. Arai, and J. Yu (2024). Accumulation, Tissue Distribution, Health Hazard of Microplastics in a Commercially Important Cat Fish, Silonia silondia from a Tropical Large-Scale Estuary. Frontiers in Sustainable Food Systems, 8; 1372059.
Ji, G., Y. Xing, and T. You (2024). Biochar as Adsorbents for Environmental Microplastics and Nanoplastics Removal. Journal of Environmental Chemical Engineering, 12(5); 113377.
Leng, L., Q. Xiong, L. Yang, H. Li, Y. Zhou, W. Zhang, S. Jiang, H. Li, and H. Huang (2021). An Overview on Engineering the Surface Area and Porosity of Biochar. Science of The Total Environment, 763; 144204.
Ma, C., Q. Chen, J. Li, B. Li, W. Liang, L. Su, and H. Shi (2021). Distribution and Translocation of Micro and Nanoplastics in Fish. Critical Reviews in Toxicology, 51(9); 740–753.
Manga, M., B. E. Evans, M. A. Camargo-Valero, and N. J. Horan (2016). Effect of Filter Media Thickness on the Performance of Sand Drying Beds Used for Faecal Sludge Management. Water Science and Technology, 74(12); 2795–2806.
Masura, J., J. Baker, G. Foster, C. Arthur, and C. Herring (2015). Laboratory Methods for the Analysis of Microplastics in the Marine Environment: Recommendations for Quantifying Synthetic Particles in Waters and Sediments. Technical Report, 48; Silver Spring, MD.
Olubusoye, B. S., J. V. Cizdziel, K. Wontor, E. Heinen, T. Grandberry, E. R. Bennett, and M. T. Moore (2024). Removal of Microplastics from Agricultural Runoff Using Biochar: A Column Feasibility Study. Frontiers in Environmental Science, 12; 1388606.
Permana, M. A., H. Widjajanti, and D. Rohendi (2023). Biodegradable Plastics: Biodegradation Percentage and Potential Microplastic Contamination in Seawater. Indonesian Journal of Environmental Management and Sustainability, 7(2); 74–79.
Suárez-Hernández, L., A. N. Ardila-A., and R. Barrera-Zapata (2017). Morphological and Physicochemical Characterization of Biochar Produced by Gasification of Selected Forestry Species. Revista Facultad de Ingeniería, 26(46); 123–130.
Sujiono, E. H., D. Zabrian, Zurnansyah, Mulyati, V. Zharvan, Samnur, and N. A. Humairah (2022). Fabrication and Characterization of Coconut Shell Activated Carbon Using Variation Chemical Activation for Wastewater Treatment Application. Results in Chemistry, 4; 100291.
United States Environmental Protection Agency (2002). National Recommended Water Quality Criteria. Technical Report. Applications of Environmental Chemistry.
Wang, J. and X. Guo (2020). Adsorption Kinetic Models: Physical Meanings, Applications, and Solving Methods. Journal of Hazardous Materials, 390; 122156.
Wang, Z., M. Sedighi, and A. Lea-Langton (2020). Filtration of Microplastic Spheres by Biochar: Removal Efficiency and Immobilisation Mechanisms. Water Research, 184; 116165.