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Article | Tropical Aquatic and Soil Pollution | Volume 6 - Issue 1 - 2026 | 68−82 | https://doi.org/10.53623/tasp.v6i1.1211
© 2026 by the author(s), and is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License Creative Commons Attribution 4.0 International (CC BY 4.0) License

Wood Chip Biochar–Sepiolite Composite Reduces Cadmium Accumulation in Maize

Author(s): Trinh Tu Anh 1 , 2 , , Nguyen Thi Xuyen 3 , Le Thi Hien 1 , Do Dat 1
Author(s) information:
1 Vietnam National University of Agriculture, 236 Ngo Xuan Quang Street, Hanoi, Vietnam
2 Hanoi National University of Education, 136 Xuan Thuy Street, Cau Giay Ward, Hanoi, Vietnam
3 Faculty of Fundamental Sciences, Viet-Hung Industrial University, No. 88, 419 St., Tay Phuong, Hanoi, Vietnam

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Tropical Aquatic and Soil Pollution

Volume 6 - Issue 1 - 2026

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This study aimed to evaluate the effectiveness of a composite material consisting of wood chip biochar (WCB) and sepiolite in reducing cadmium (Cd) uptake, accumulation, and translocation in maize cultivated in Cd-contaminated soil in Vietnam. A field experiment was conducted using three maize varieties (LVN10, NK7328, and CP511) under eight treatment conditions, including a control (CK), individual applications of WCB or Sep, and combined WCB/Sep treatments at different ratios. Cadmium concentrations in roots, stems, leaves, and grains were determined using atomic absorption spectroscopy (AAS), while the bioconcentration factor (BCF) and translocation factor (TF) were calculated to assess Cd accumulation and transport within the plants. The results showed that Cd accumulated predominantly in the roots, followed by leaves, stems, and the lowest levels in grains. Individual application of WCB or Sep only resulted in limited reductions in Cd accumulation, whereas the combined treatments exhibited more pronounced effects. Among them, the W2S2 treatment (0.2% WCB + 0.6% Sep) demonstrated the highest effectiveness across most parameters, significantly reducing Cd concentrations in roots, stems, leaves, and grains compared with the control. The BCF values decreased by up to 36.1% in LVN10 and 45.0% in CP511, while all TF values remained below 1, indicating restricted Cd translocation into grains. These findings demonstrate that the WCB/Sep composite has strong potential as an effective immobilization strategy to reduce the bioavailability of Cd in soil, thereby improving crop safety and supporting the sustainable management of heavy metal-contaminated agricultural land.

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Genchi, G.; Sinicropi, M.S.; Lauria, G.; Carocci, A.; Catalano, A. (2020). The Effects of Cadmium Toxicity. International Journal of Environmental Research and Public Health, 17, 3782. https://doi.org/10.3390/ijerph17113782.

Kubier, A.; Wilkin, R.T.; Pichler, T. (2019). Cadmium in soils and groundwater: A review. Applied Geochemistry, 108, 104388. https://doi.org/10.1016/j.apgeochem.2019.104388.

Haider, F.U.; Liqun, C.; Coulter, J.A.; Cheema, S.A.; Wu, J.; Zhang, R.; Wenjun, M.; Farooq, M. (2021). Cadmium toxicity in plants: Impacts and remediation strategies. Ecotoxicology and Environmental Safety, 211, 111887. https://doi.org/10.1016/j.ecoenv.2020.111887.

Yang, Q.; Wu, K.; Liu, Y.; Guo, Y.; Liang, J.; Zhao, W.; Tang, B.; Wang, J.; Shu, Y. (2025). Ecotoxicological effects of maize-mediated cadmium stress on the fall armyworm (Spodoptera frugiperda): Gut cell ultrastructure, microbiome and transcriptome. Environmental Chemistry and Ecotoxicology, 7, 1289–1299. https://doi.org/10.1016/j.enceco.2025.06.011.

Thanh, N.V.; Thuong Giang, P.; Thuy, N.T.T. (2026). Applications of Artificial Intelligence in Environmental Management in Vietnam: A Mini Review. Sustainable Environmental Insight, 3. https://doi.org/10.53623/sein.v3i1.1008.

Chu, T.T.H. (2018). Environmental pollution in Vietnam: Challenges in management and protection. Journal of Vietnamese Environment, 9, 1–3. https://doi.org/10.13141/jve.vol9.no1.pp1-3.

Clemens, S.; Aarts, M.G.M.; Thomine, S.; Verbruggen, N. (2013). Plant science: The key to preventing slow cadmium poisoning. Trends in Plant Science, 18, 92–99. https://doi.org/10.1016/j.tplants.2012.08.003.

Duan, Z.; Chen, C.; Ni, C.; Xiong, J.; Wang, Z.; Cai, J.; Tan, W. (2023). How different is the remediation effect of biochar for cadmium contaminated soil in various cropping systems? A global meta-analysis. Journal of Hazardous Materials, 448, 130939. https://doi.org/10.1016/j.jhazmat.2023.130939.

Haider, F.U.; Ain, N.-U.; Khan, I.; Farooq, M.; Habiba; Cai, L.; Li, Y. (2024). Co-application of biochar and plant growth regulators improves maize growth and decreases Cd accumulation in cadmium-contaminated soil. Journal of Cleaner Production, 440, 140515. https://doi.org/10.1016/j.jclepro.2023.140515.

Wang, Y.; Shen, X.; Bian, R.; Liu, X.; Zheng, J.; Cheng, K.; Xuhui, Z.; Li, L.; Pan, G. (2022). Effect of pyrolysis temperature of biochar on Cd, Pb and As bioavailability and bacterial community composition in contaminated paddy soil. Ecotoxicology and Environmental Safety, 247, 114237. https://doi.org/10.1016/j.ecoenv.2022.114237.

Yu, X.; Zhou, H.; Ye, X.; Wang, H. (2021). From hazardous agriculture waste to hazardous metal scavenger: Tobacco stalk biochar-mediated sequestration of Cd leads to enhanced tobacco productivity. Journal of Hazardous Materials, 413, 125303. https://doi.org/10.1016/j.jhazmat.2021.125303.

Bashir, S.; Ali, U.; Shaaban, M.; Gulshan, A.B.; Iqbal, J.; Khan, S.; Husain, A.; Ahmed, N.; Mehmood, S.; Kamran, M.; Hu, H. (2020). Role of sepiolite for cadmium (Cd) polluted soil restoration and spinach growth in wastewater irrigated agricultural soil. Journal of Environmental Management, 258, 110020. https://doi.org/10.1016/j.jenvman.2019.110020.

Li, J.; Zhang, P.; Ye, J.; Zhang, G.; Cai, Y. (2019). Simultaneous in-situ remediation and fertilization of Cd-contaminated weak-alkaline farmland for wheat production. Journal of Environmental Management, 250, 109528. https://doi.org/10.1016/j.jenvman.2019.109528.

Hamid, Y.; Tang, L.; Hussain, B.; Usman, M.; Liu, L.; Ulhassan, Z.; He, Z.; Yang, X. (2021). Sepiolite clay: A review of its applications to immobilize toxic metals in contaminated soils and its implications in soil–plant system. Environmental Technology and Innovation, 23, 101598. https://doi.org/10.1016/j.eti.2021.101598.

Xiang, L.; Liu, S.; Ye, S.; Yang, H.; Song, B.; Qin, F.; Shen, M.; Tan, C.; Zeng, G.; Tan, X. (2021). Potential hazards of biochar: The negative environmental impacts of biochar applications. Journal of Hazardous Materials, 420, 126611. https://doi.org/10.1016/j.jhazmat.2021.126611.

Zeng, P.; Yang, M.; He, S.; Kong, Y.; Zhu, X.; Ma, Z.; Wu, M. (2025). Effects of Biochar and Sepiolite on Pb and Cd Dynamics in Contaminated Soil with Different Corn Varieties. Toxics, 13, 127. https://doi.org/10.3390/toxics13020127.

Qin, X.; Liu, Y.; Huang, Q.; Liu, Y.; Zhao, L.; Xu, Y. (2019). In-Situ Remediation of Cadmium and Atrazine Contaminated Acid Red Soil of South China Using Sepiolite and Biochar. Bulletin of Environmental Contamination and Toxicology, 102, 128–133. https://doi.org/10.1007/s00128-018-2494-2.

Chen, Z.; Pei, J.; Wei, Z.; Ruan, X.; Hua, Y.; Xu, W.; Zhang, C.; Liu, T.; Guo, Y. (2021). A novel maize biochar-based compound fertilizer for immobilizing cadmium and improving soil quality and maize growth. Environmental Pollution, 277, 116455. https://doi.org/10.1016/j.envpol.2021.116455.

Gao, Y.; Xiang, S.; Yan, X.; Wang, R.; Yang, X. (2026). Leveraging soil quality assessment for Cd-contaminated farmland through a diagnostic quantitative analysis of multi-dimensional indicators. Journal of Hazardous Materials, 506, 141658. https://doi.org/10.1016/j.jhazmat.2026.141658.

Thu, L.T.M.; Nguyen, T.T.K.; Han, D.L.N.; Trong, N.D.; Quang, L.T.; Thang, L.C.; Nhan, T.C.; Xuan, L.N.T.; Khuong, N.Q. (2025). Enhancement of Hybrid Maize Using Potassium-Solubilizing Purple Non-Sulfur Bacteria Under Different Dilution Rates at Early Growth Stages. Seeds, 4, 58. https://doi.org/10.3390/seeds4040058.

Rashid, M.S.; Liu, G.; Yousaf, B.; Hamid, Y.; Rehman, A.; Arif, M.; Ahmed, R.; Song, Y.; Ashraf, A. (2023). Role of biochar-based free radicals in immobilization and speciation of metals in the contaminated soil-plant environment. Journal of Environmental Management, 325, 116620. https://doi.org/10.1016/j.jenvman.2022.116620.

Zhou, C.; Song, X.; Wang, Y.; Wang, H.; Ge, S. (2022). The sorption and short-term immobilization of lead and cadmium by nano-hydroxyapatite/biochar in aqueous solution and soil. Chemosphere, 286, 131810. https://doi.org/10.1016/j.chemosphere.2021.131810.

Dong, X.; Chu, Y.; Tong, Z.; Sun, M.; Meng, D.; Yi, X.; Gao, T.; Wang, M.; Duan, J. (2024). Mechanisms of adsorption and functionalization of biochar for pesticides: A review. Ecotoxicology and Environmental Safety, 272, 116019. https://doi.org/10.1016/j.ecoenv.2024.116019.

Zhao, Z. (2025). Current Research Status and Prospects of Biochar Materials for Remediation of Soil Heavy Metal Pollution. Applied and Computational Engineering, 180, 259–265. https://doi.org/10.54254/2755-2721/2026.KA27121.

Zhou, F.; Ye, G.; Gao, Y.; Wang, H.; Zhou, S.; Liu, Y.; Yan, C. (2022). Cadmium adsorption by thermal-activated sepiolite: Application to in-situ remediation of artificially contaminated soil. Journal of Hazardous Materials, 423, 127104. https://doi.org/10.1016/j.jhazmat.2021.127104.

Abdelrhman, F.; Ram, S.; Zhou, J.; Ahmed, Z.; Altaf, N.-U.H.; Mostafa, E.; Zhang, Y. (2026). Chemically modified biochar for enhanced heavy metals adsorption in aqueous solutions. Resources, Chemicals and Materials, 100205. https://doi.org/10.1016/j.recm.2026.100205.

Hamid, Y.; Tang, L.; Hussain, B.; Usman, M.; Lin, Q.; Rashid, M.S.; He, Z.; Yang, X. (2020). Organic soil additives for the remediation of cadmium contaminated soils and their impact on the soil-plant system: A review. Science of the Total Environment, 707, 136121. https://doi.org/10.1016/j.scitotenv.2019.136121.

Han, J.; Wu, D.; Yang, J.; Shi, Y.; Abid, G.; Wang, L.; Li, Z. (2024). A biochar-based amendment improved cadmium (Cd) immobilization, reduced its bioaccumulation, and increased rice yield. Frontiers in Environmental Science, 12, 1487190. https://doi.org/10.3389/fenvs.2024.1487190.

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SUBMITTED: 22 May 2026
ACCEPTED: 16 June 2026
PUBLISHED: 20 June 2026
SUBMITTED to ACCEPTED: 26 days
DOI: https://doi.org/10.53623/tasp.v6i1.1211

Cite this article
Anh, T. T., Xuyen, N. T., Hien, L. T., & Dat, D. (2026). Wood Chip Biochar–Sepiolite Composite Reduces Cadmium Accumulation in Maize. Tropical Aquatic and Soil Pollution, 6(1), 68−82. https://doi.org/10.53623/tasp.v6i1.1211
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