Evaluating the Role of Hydrochars as Sustainable Adsorbents for Pollutant Removal
DOI:
https://doi.org/10.30544/MMD59Abstract
Hydrothermal carbonization (HTC) produces biomass-derived hydrochar, a promising adsorbent for environmental remediation. Lignocellulosic biomass serves as the primary feedstock, and adsorption performance depends on biomass structure and HTC conditions, especially carbonization temperature. This review highlights hydrochar’s adsorption capabilities and modification strategies, including physical treatments to increase surface area and chemical treatments to introduce oxygen-containing functional groups. Heteroatom doping and acid-base modifications notably enhance the removal of metal ions and dyes. Hydrothermal treatment is key to producing tailored hydrochars for specific applications. Future research should focus on combining physico-chemical modifications, deepening understanding of adsorption mechanisms, and broadening hydrochar applications. These efforts will advance the use of biomass hydrochars as effective, sustainable adsorbents for pollution control while addressing waste management.
Keywords:
Hydrothermal carbonization, biomass-derived adsorbents, environmental remediation, sustainable hydrochar, surface modificationReferences
Algethami, Jari, Mohsen Alhamami, Ayoub Abdullah Alqadami, and Saad Melhi. "Adsorptive performance of a new magnetic hydrochar nanocomposite for highly efficient removal of cadmium ions from water: Mechanism, modeling, and reusability studies." Environmental Technology and Innovation (2023): 32, 103404. https://doi.org/10.1016/j.eti.2023.103404.
Behera, Amit Kumar, Krushna Prasad Shadangi, and Prakash Kumar Sarangi. "Efficient removal of Rhodamine B dye using biochar as an adsorbent: Study the performance, kinetics, thermodynamics, adsorption isotherms and its reusability." Chemosphere (2024): 354, 141702, https://doi.org/10.1016/j.chemosphere.2024.141702.
Budiman, Ismail, Dede Hermawan, Fauzi Febrianto, and Gustan Pari Subyakto. "Char properties and pollutant adsorption capability of oil palm shell using hydrothermal process." Biomass Conversion and Biorefinery (2019): 9, 681-688, https://doi.org/10.1007/s13399-019-00394-5.
Cavali, Matheus, Thuanne Braúlio Hennig, Nelson Libardi Junior, Boram Kim, Vincent Garnier, Hassen Benbelkacem, Rémy Bayard, Adenise Lorenci Woiciechowski, William Gerson Matias, and Armando Borges de Castilhos Junior. "Co-Hydrothermal Carbonization of Sawdust and Sewage Sludge: Assessing the Potential of the Hydrochar as an Adsorbent and the Ecotoxicity of the Process Water." Applied Sciences (2025):15, 1052. https://doi.org/10.3390/app15031052.
Ercegović, Marija, Jelena Petrović, Marija Koprivica, Marija Simić, Mirko Grubišić, Nikola Vuković, and Jugoslav Krstić. "Efficient Adsorption of Pollutants from Aqueous Solutions by Hydrochar-Based Hierarchical Porous Carbons." Water (2024): 16, 2177; https://doi.org/10.3390/w16152177.
Gong, Miao, Fuqiang Xu, Piao Liu, Qiao Xu, Ying Su, Yujie Fan, and Mingdong Li. "A review of biomass hydrochar as an adsorbent: Performance, modification, and applications." Journal of Water Process Engineering (2025): 71, 107314, https://doi.org/10.1016/j.jwpe.2025.107314.
Ha, Duy Thinh, Huu Duc Tong, Kim-Quang Tran, and Thi Thanh Trinh. "The role of chemical functional groups in dewaterability of hydrochar: A molecular simulation study." Journal of Molecular Liquids (2024): 400, 124482, https://doi.org/10.1016/j.molliq.2024.124482.
He, Tong, Xuesong Zhou, Zhichao Bao, Shiyu Fu, and Xiuyi Lin. "Preparation of hydrochar by one-step hydrothermal carbonization with potassium ferrate-assisted activation for the removal of tetracycline in water." Journal of Chemical Technology and Biotechnology (2023): 98, 2039-2050, https://doi.org/10.1002/jctb.7417.
Khanzada, Aisha Khan, Hussein E. Al-Hazmi, Tonni Agustiono Kurniawan, Joanna Majtacz, Grzegorz Piechota, Gopalakrishnan Kumar, Peyman Ezzati, Mohammad Reza Saeb, Navid Rabiee, Hassan Karimi-Maleh, Eder Claudio Lima, and Jacek Mąkinia. "Hydrochar as a bio-based adsorbent for heavy metals removal: A review of production processes, adsorption mechanisms, kinetic models, regeneration and reusability." Science of The Total Environment (2024): 945, 173972. https://doi.org/10.1016/j.scitotenv.2024.173972.
Khoshbouy, Reza, Fumitake Takahashi, and Kunio Yoshikawa. "Preparation of high surface area sludge-based activated hydrochar via hydrothermal carbonization and application in the removal of basic dye." Environmental Research. (2019): 175, 457-467, https://doi.org/10.1016/j.envres.2019.04.002.
Kim, Heegon, Seon Yong Lee, Jae-Woo Choi, and Kyung-Won Jung. "Synergistic effect in simultaneous removal of cationic and anionic heavy metals by nitrogen heteroatom doped hydrochar from aqueous solutions." Chemosphere (2023): 323, 138269. https://doi.org/10.1016/j.chemosphere.2023.138269.
Kojić, Marija, Marija Mihajlović, Milena Marinović-Cincović, Jelena Petrović, Đurica Katanić, Aleksandar Krstić, Svetlana Butulija, and Antonije Onija. "Calcium-pyro-hydrochar derived from the spent mushroom substrate as a functional sorbent of Pb2+ and Cd2+ from aqueous solutions." Waste Management and Research (2022): 40, 1629-1636. https://doi.org/10.1177/0734242X221093951.
Koprivica, Marija, Marija Simić, Jelena Petrović, Marija Ercegović, and Jelena Dimitrijević. "Evaluation of Adsorption Efficiency on Pb(II) Ions Removal Using Alkali-Modified Hydrochar from Paulownia Leaves." Processes (2023): 11, 1327. https://doi.org/10.3390/pr11051327.
Nguyen, Duy, Hay Nguyen Tran, Huang-Ping Chao, and Chu-Ching Lin. "Effect of nitric acid oxidation on the surface of hydrochars to sorb methylene blue: an adsorption mechanism comparison." Adsorption Science and Technology (2019): 37, 607-622, https://doi.org/10.1177/0263617419867519.
Nguyen, Lan Huong, Xuan Hoan Nguyen, Ngoc Dang Khoa Nguyen, Huu Tap Van, Van Nam Thai, Hoang Nghem Le, Van Dat Pham, Ngoc Anh Nguyen, Tan Phong Nguyen, and The Hung Nguyen. "H2O2 modified-hydrochar derived from paper waste sludge for enriched surface functional groups and promoted adsorption to ammonium." Journal of the Taiwan Institute of Chemical Engineers (2021): 126, 119-133, https://doi.org/10.1016/j.jtice.2021.06.057.
Petrović, Jelena, Marija Ercegović, Marija Simić, Dimitrios Kalderis, Marija Koprivica, Jelena Milojković, and Dragan Radulović. "Novel Mg-doped pyro-hydrochars as methylene blue adsorbents: Adsorption behavior and mechanism." Journal of Molecular Liquids (2023): 376, 121424. https://doi.org/10.1016/j.molliq.2023.121424.
Petrović, Jelena, Marija Ercegović, Marija Simić, Marija Koprivica, Jelena Dimitrijević, Aleksandar Jovanović, Jovana Janković Pantić. "Hydrothermal carbonization of waste biomass: a review of hydrochar preparation and environmental application." Processes (2024), 12, 207, https://doi.org/10.3390/pr12010207.
Petrović, Jelena, Mirjana Stojanović, Jelena Milojković, Marija Petrović, Tatjana Šoštarić, Mila Laušević, and Marija Mihajlović. "Alkali modified hydrochar of grape pomace as a perspective adsorbent of Pb2+ from aqueous solution." Journal of Environmental Management (2016): 182, 292-300. http://dx.doi.org/10.1016/j.jenvman.2016.07.081.
Santana, Mozarte Santos, Rafael Pereira Alves, Lucas Santos Santana, Mateus Aquino Gonçalves, and Mário César Guerreiro. "Structural, inorganic, and adsorptive properties of hydrochars obtained by hydrothermal carbonization of coffee waste." Journal of Environmental Management (2022): 302, 114021, https://doi.org/10.1016/j.jenvman.2021.114021.
Yang, Jiantao, Zhiming Zhang, Junyao Wang, Xuelei Zhao, Yong Zhao, Jianqiang Qian, and Tengfei Wang. "Pyrolysis and hydrothermal carbonization of biowaste: A comparative review on the conversion pathways and potential applications of char product." Sustainable Chemistry and Pharmacy (2023): 33, 101106, https://doi.org/10.1016/j.scp.2023.101106.
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Copyright (c) 2025 Jelena Petrović, Marija Simić, Marija Ercegović, Marija Koprivica, Jelena Dimitrijević, Dimitrije Anđić
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