A Comprehensive Evaluation of Adsorption Techniques for Dye Elimination in Wastewater: From Conventional Adsorbents to Nanotechnology

Marwan Shamo Shekho; Kanaan Ramadan Ahmed; Shinwar Ahmed Idrees

doi:10.65542/djei.v2i1.31

Authors

Marwan Shamo Shekho Department of Environmental Science, University of Zakho
Kanaan Ramadan Ahmed Department of Environmental Science, University of Zakho
Shinwar Ahmed Idrees Department of Chemistry, University of Zakho https://orcid.org/0000-0001-6975-3527

DOI:

https://doi.org/10.65542/djei.v2i1.31

Keywords:

Adsorption, nano adsorbents, green synthesis, wastewater, dyes

Abstract

The continuous discharge of hazardous synthetic dyes into aquatic environments as a result of rapid industrialization poses a serious threat to both environmental and human health. This review aims to provide a comprehensive and up to date evaluation of adsorption techniques for dye removal from wastewater, with a focus on both conventional and emerging adsorbent materials. The review examines and compares natural materials, such as clays, zeolites, charcoal, and agricultural wastes, as well as engineered and nano scale materials, including carbon nanotubes, graphene, metal organic frameworks, and nanocomposites, for wastewater decolorization. This study presents a critical analysis of published studies from 2018 to 2025, focusing on the performance of various adsorbents under key operational parameters such as pH, temperature, contact time, and adsorbent dosage. The dominant adsorption mechanisms, including electrostatic attraction, ion exchange, and surface complexation, are systematically discussed. Special attention is given to the role of nanotechnology and green synthesis strategies in improving adsorption efficiency and material reusability. The review indicates that nano engineered and hybrid adsorbents generally exhibit superior adsorption performance and represent promising candidates for scalable and environmentally sustainable wastewater treatment applications. Future research should prioritize the development of cost-effective regeneration methods, evaluation using real industrial effluents, and pilot scale studies to facilitate the transition from laboratory research to industrial implementation.

References

ănăduc, D. et al. Freshwater as a sustainable resource and generator of secondary resources in the 21st century: Stressors, threats, risks, management and protection strategies, and conservation approaches. Int. J. Environ. Res. Public Health 19, 16570 (2022). DOI: https://doi.org/10.3390/ijerph192416570

Slama, H. Ben et al. Diversity of synthetic dyes from textile industries, discharge impacts and treatment methods. Appl. Sci. 11, 6255 (2021). DOI: https://doi.org/10.3390/app11146255

Hintz, N. H., Schulze, B., Wacker, A. & Striebel, M. Ecological impacts of photosynthetic light harvesting in changing aquatic environments: A systematic literature map. Ecol. Evol. 12, e8753 (2022). DOI: https://doi.org/10.1002/ece3.8753

Donkadokula, N. Y., Kola, A. K., Naz, I. & Saroj, D. A review on advanced physico-chemical and biological textile dye wastewater treatment techniques. Rev. Environ. Sci. bio/technology 19, 543–560 (2020). DOI: https://doi.org/10.1007/s11157-020-09543-z

Keskin, B., Ersahin, M. E., Ozgun, H. & Koyuncu, I. Pilot and full-scale applications of membrane processes for textile wastewater treatment: A critical review. J. Water Process Eng. 42, 102172 (2021). DOI: https://doi.org/10.1016/j.jwpe.2021.102172

Rashid, R., Shafiq, I., Akhter, P., Iqbal, M. J. & Hussain, M. A state-of-the-art review on wastewater treatment techniques: the effectiveness of adsorption method. Environ. Sci. Pollut. Res. 28, 9050–9066 (2021). DOI: https://doi.org/10.1007/s11356-021-12395-x

Eniola, J. O., Sizirici, B., Fseha, Y., Shaheen, J. F. & Aboulella, A. M. Application of conventional and emerging low-cost adsorbents as sustainable materials for removal of contaminants from water. Environ. Sci. Pollut. Res. 30, 88245–88271 (2023). DOI: https://doi.org/10.1007/s11356-023-28399-8

Younas, F. et al. Current and emerging adsorbent technologies for wastewater treatment: trends, limitations, and environmental implications. Water 13, 215 (2021). DOI: https://doi.org/10.3390/w13020215

Dutta, S., Gupta, B., Srivastava, S. K. & Gupta, A. K. Recent advances on the removal of dyes from wastewater using various adsorbents: A critical review. Mater. Adv. 2, 4497–4531 (2021). DOI: https://doi.org/10.1039/D1MA00354B

Liu, B., Khan, A., Kim, K.-H., Kukkar, D. & Zhang, M. The adsorptive removal of lead ions in aquatic media: Performance comparison between advanced functional materials and conventional materials. Crit. Rev. Environ. Sci. Technol. 50, 2441–2483 (2020). DOI: https://doi.org/10.1080/10643389.2019.1694820

Baruah, A., Chaudhary, V., Malik, R. & Tomer, V. K. Nanotechnology based solutions for wastewater treatment. in Nanotechnology in Water and wastewater treatment 337–368 (Elsevier, 2019). DOI: https://doi.org/10.1016/B978-0-12-813902-8.00017-4

Crini, G., Lichtfouse, E., Wilson, L. D. & Morin-Crini, N. Conventional and non-conventional adsorbents for wastewater treatment. Environ. Chem. Lett. 17, 195–213 (2019). DOI: https://doi.org/10.1007/s10311-018-0786-8

Raji, Z., Karim, A., Karam, A. & Khalloufi, S. Adsorption of heavy metals: mechanisms, kinetics, and applications of various adsorbents in wastewater remediation—a review. in Waste vol. 1 775–805 (MDPI, 2023). DOI: https://doi.org/10.3390/waste1030046

Akhtar, M. S., Ali, S. & Zaman, W. Innovative adsorbents for pollutant removal: Exploring the latest research and applications. Molecules 29, 4317 (2024). DOI: https://doi.org/10.3390/molecules29184317

Rehman, A., Park, M. & Park, S.-J. Current progress on the surface chemical modification of carbonaceous materials. Coatings 9, 103 (2019). DOI: https://doi.org/10.3390/coatings9020103

Ngulube, K. F., Abdelhaleem, A., Osman, A. I., Peng, L. & Nasr, M. Advancing sustainable water treatment strategies: harnessing magnetite-based photocatalysts and techno-economic analysis for enhanced wastewater management in the context of SDGs. Environ. Sci. Pollut. Res. 1–37 (2024). DOI: https://doi.org/10.1007/s11356-024-32680-9

Ganjoo, R., Sharma, S., Kumar, A. & Daouda, M. M. Activated carbon: Fundamentals, classification, and properties. (2023). DOI: https://doi.org/10.1039/BK9781839169861-00001

Gu, S., Kang, X., Wang, L., Lichtfouse, E. & Wang, C. Clay mineral adsorbents for heavy metal removal from wastewater: a review. Environ. Chem. Lett. 17, 629–654 (2019). DOI: https://doi.org/10.1007/s10311-018-0813-9

Kumari, N. & Mohan, C. Basics of clay minerals and their characteristic properties. Clay Clay Min. 24, 1–29 (2021). DOI: https://doi.org/10.5772/intechopen.97672

Ugwu, I. M. & Igbokwe, O. A. Sorption of heavy metals on clay minerals and oxides: a review. Adv. sorption Process Appl. 2019, 1–23 (2019).

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

Duque-Acevedo, M., Belmonte-Ureña, L. J., Cortés-García, F. J. & Camacho-Ferre, F. Agricultural waste: Review of the evolution, approaches and perspectives on alternative uses. Glob. Ecol. Conserv. 22, e00902 (2020). DOI: https://doi.org/10.1016/j.gecco.2020.e00902

Bish, D. L. & Ming, D. W. Natural zeolites: occurrence, properties, applications. vol. 45 (Walter de Gruyter GmbH & Co KG, 2018).

Chen, L.-H. et al. Hierarchically structured zeolites: from design to application. Chem. Rev. 120, 11194–11294 (2020). DOI: https://doi.org/10.1021/acs.chemrev.0c00016

Van Der Vegt, N. F. A. et al. Water-mediated ion pairing: Occurrence and relevance. Chem. Rev. 116, 7626–7641 (2016). DOI: https://doi.org/10.1021/acs.chemrev.5b00742

Liang, D., Liu, Y., Zhang, R., Xie, Q. & Zhang, L. A review on the influence factors in the synthesis of zeolites and the transformation behavior of silicon and aluminum during the process. Comments Inorg. Chem. 44, 461–497 (2024). DOI: https://doi.org/10.1080/02603594.2024.2309878

Eshete, Y. D. Synthesis and Characterization of Zeolite-A from Kombolcha Kaolin by Hydrothermal Method for the Removal of Mg2+ and Ca2+ from Aqueous Solution. at (2023).

Mondal, M. et al. Zeolites enhance soil health, crop productivity and environmental safety. Agronomy 11, 448 (2021). DOI: https://doi.org/10.3390/agronomy11030448

Ndayambaje, G. Sorption properties of natural zeolites for the removal of ammonium and chromium ions in aqueous solution. (2011).

Das, D. & Sengupta, S. Alkaline Hydrothermal Treatment of Chabazite to Enhance Its Ammonium Removal and Recovery Capabilities through Recrystallization. Processes 12, 85 (2023). DOI: https://doi.org/10.3390/pr12010085

Ambaye, T. G., Vaccari, M., van Hullebusch, E. D., Amrane, A. & Rtimi, S. Mechanisms and adsorption capacities of biochar for the removal of organic and inorganic pollutants from industrial wastewater. Int. J. Environ. Sci. Technol. 18, 3273–3294 (2021). DOI: https://doi.org/10.1007/s13762-020-03060-w

Guaya Caraguay, D. E. Evaluation of phosphate and ammonium removal and valorization from urban waste waters by impregnated metal hydrated oxides inorganic natural zeolites. (2017).

Fotouh, A. E. et al. Facile Synthesis of Analcime (NaSi2AlO6· H2O) Nanoparticles Using Polyethylene Glycol 400 as an Organic Template for Effective Removal of Zn (II) and Cd (II) Ions from Aqueous Solutions. Silicon 16, 2671–2687 (2024). DOI: https://doi.org/10.1007/s12633-024-02869-1

Li, Y. et al. Conversion of biomass ash to different types of zeolites: a review. Energy Sources, Part A Recover. Util. Environ. Eff. 43, 1745–1758 (2021). DOI: https://doi.org/10.1080/15567036.2019.1640316

Saletnik, B. et al. Biochar as a multifunctional component of the environment—a review. Appl. Sci. 9, 1139 (2019). DOI: https://doi.org/10.3390/app9061139

Candido, I. C. M., Pires, I. C. B. & de Oliveira, H. P. Natural and synthetic fiber‐based adsorbents for water remediation. CLEAN–Soil, Air, Water 49, 2000189 (2021). DOI: https://doi.org/10.1002/clen.202000189

Eroglu, N., Emekci, M. & Athanassiou, C. G. Applications of natural zeolites on agriculture and food production. J. Sci. Food Agric. 97, 3487–3499 (2017). DOI: https://doi.org/10.1002/jsfa.8312

Zito, P. & Shipley, H. J. Inorganic nano-adsorbents for the removal of heavy metals and arsenic: a review. RSC Adv. 5, 29885–29907 (2015). DOI: https://doi.org/10.1039/C5RA02714D

Sithole, T. A review on regeneration of adsorbent and recovery of metals: adsorbent disposal and regeneration mechanism. South African J. Chem. Eng. 50, 39–50 (2024). DOI: https://doi.org/10.1016/j.sajce.2024.07.006

Liu, W.-J., Jiang, H. & Yu, H.-Q. Development of biochar-based functional materials: toward a sustainable platform carbon material. Chem. Rev. 115, 12251–12285 (2015). DOI: https://doi.org/10.1021/acs.chemrev.5b00195

Li, A. et al. An environment-friendly and multi-functional absorbent from chitosan for organic pollutants and heavy metal ion. Carbohydr. Polym. 148, 272–280 (2016). DOI: https://doi.org/10.1016/j.carbpol.2016.04.070

Kayan, A. Inorganic-organic hybrid materials and their adsorbent properties. Adv. Compos. Hybrid Mater. 2, 34–45 (2019). DOI: https://doi.org/10.1007/s42114-018-0073-y

Salama, A. New sustainable hybrid material as adsorbent for dye removal from aqueous solutions. J. Colloid Interface Sci. 487, 348–353 (2017). DOI: https://doi.org/10.1016/j.jcis.2016.10.034

Samiey, B., Cheng, C.-H. & Wu, J. Organic-inorganic hybrid polymers as adsorbents for removal of heavy metal ions from solutions: a review. Materials (Basel). 7, 673–726 (2014). DOI: https://doi.org/10.3390/ma7020673

Bouyahmed, F. et al. A wide adsorption range hybrid material based on chitosan, activated carbon and montmorillonite for water treatment. C 4, 35 (2018). DOI: https://doi.org/10.3390/c4020035

Matei, E. et al. Natural polymers and their nanocomposites used for environmental applications. Nanomaterials 12, 1707 (2022). DOI: https://doi.org/10.3390/nano12101707

Qamar, S. A., Ashiq, M., Jahangeer, M., Riasat, A. & Bilal, M. Chitosan-based hybrid materials as adsorbents for textile dyes–A review. Case Stud. Chem. Environ. Eng. 2, 100021 (2020). DOI: https://doi.org/10.1016/j.cscee.2020.100021

Yaseen, D. A. & Scholz, M. Textile dye wastewater characteristics and constituents of synthetic effluents: a critical review. Int. J. Environ. Sci. Technol. 16, 1193–1226 (2019). DOI: https://doi.org/10.1007/s13762-018-2130-z

Saxena, M., Sharma, N. & Saxena, R. Highly efficient and rapid removal of a toxic dye: adsorption kinetics, isotherm, and mechanism studies on functionalized multiwalled carbon nanotubes. Surfaces and Interfaces 21, 100639 (2020). DOI: https://doi.org/10.1016/j.surfin.2020.100639

Hashmi, Z. et al. Comparative analysis of conventional to biomass-derived adsorbent for wastewater treatment: a review. Biomass Convers. Biorefinery 14, 45–76 (2024). DOI: https://doi.org/10.1007/s13399-022-02443-y

Ghosh, N., Das, S., Biswas, G. & Haldar, P. K. Review on some metal oxide nanoparticles as effective adsorbent in wastewater treatment. Water Sci. Technol. 85, 3370–3395 (2022). DOI: https://doi.org/10.2166/wst.2022.153

Sengul, A. B. & Asmatulu, E. Toxicity of metal and metal oxide nanoparticles: a review. Environ. Chem. Lett. 18, 1659–1683 (2020). DOI: https://doi.org/10.1007/s10311-020-01033-6

Díez-Pascual, A. M. Carbon-based nanomaterials. International Journal of Molecular Sciences vol. 22 7726 at (2021). DOI: https://doi.org/10.3390/ijms22147726

Song, G. et al. Sorptive removal of methylene blue from water by magnetic multi-walled carbon nanotube composites. Environ. Sci. Pollut. Res. 28, 41268–41282 (2021). DOI: https://doi.org/10.1007/s11356-021-13543-z

Mohamed, M. M., Ghanem, M. A., Khairy, M., Naguib, E. & Alotaibi, N. H. Zinc oxide incorporated carbon nanotubes or graphene oxide nanohybrids for enhanced sonophotocatalytic degradation of methylene blue dye. Appl. Surf. Sci. 487, 539–549 (2019). DOI: https://doi.org/10.1016/j.apsusc.2019.05.135

Mashkoor, F., Nasar, A. & Inamuddin. Carbon nanotube-based adsorbents for the removal of dyes from waters: a review. Environ. Chem. Lett. 18, 605–629 (2020). DOI: https://doi.org/10.1007/s10311-020-00970-6

Kučuk, N., Primožič, M., Knez, Ž. & Leitgeb, M. Sustainable biodegradable biopolymer-based nanoparticles for healthcare applications. Int. J. Mol. Sci. 24, 3188 (2023). DOI: https://doi.org/10.3390/ijms24043188

Barrera, G. et al. Magnetic properties of nanocomposites. Appl. Sci. 9, 212 (2019). DOI: https://doi.org/10.3390/app9020212

Wen, C. et al. Biochar as the effective adsorbent to combustion gaseous pollutants: Preparation, activation, functionalization and the adsorption mechanisms. Prog. Energy Combust. Sci. 99, 101098 (2023). DOI: https://doi.org/10.1016/j.pecs.2023.101098

Zhu, H., Chen, S. & Luo, Y. Adsorption mechanisms of hydrogels for heavy metal and organic dyes removal: A short review. J. Agric. Food Res. 12, 100552 (2023). DOI: https://doi.org/10.1016/j.jafr.2023.100552

Sellaoui, L. et al. Adsorption of emerging pollutants on lignin-based activated carbon: Analysis of adsorption mechanism via characterization, kinetics and equilibrium studies. Chem. Eng. J. 452, 139399 (2023). DOI: https://doi.org/10.1016/j.cej.2022.139399

Musah, M. et al. Adsorption kinetics and isotherm models: a review. Caliphate J. Sci. Technol. 4, 20–26 (2022). DOI: https://doi.org/10.4314/cajost.v4i1.3

Wang, J. & Guo, X. Adsorption kinetics and isotherm models of heavy metals by various adsorbents: An overview. Crit. Rev. Environ. Sci. Technol. 53, 1837–1865 (2023). DOI: https://doi.org/10.1080/10643389.2023.2221157

Tran, H. N. Adsorption technology for water and wastewater treatments. Water vol. 15 2857 at (2023). DOI: https://doi.org/10.3390/w15152857

Girish, C. R. Determination of thermodynamic parameters in adsorption studies: a review. Chem. Pap. 79, 5687–5706 (2025). DOI: https://doi.org/10.1007/s11696-025-04218-x

Wang, L. et al. High energy and power zinc ion capacitors: a dual-ion adsorption and reversible chemical adsorption coupling mechanism. ACS Nano 16, 2877–2888 (2022). DOI: https://doi.org/10.1021/acsnano.1c09936

Mohammed, A., Ahmed, A. U., Ibraheem, H., Kadhom, M. & Yousif, E. Physisorption theory of surface area and porosity determination: A short review. in AIP Conference Proceedings vol. 2450 20007 (AIP Publishing LLC, 2022). DOI: https://doi.org/10.1063/5.0093583

Zaini, M. S. M., Arshad, M. & Syed-Hassan, S. S. A. Adsorption isotherm and kinetic study of methane on palm kernel shell-derived activated carbon. J. Bioresour. Bioprod. 8, 66–77 (2023). DOI: https://doi.org/10.1016/j.jobab.2022.11.002