International Journal of Applied Science and Engineering

Published by Chaoyang University of Technology

Mohamed H. Sorour, Heba A. Hani*, Hayam F. Shaalan, Marwa M. El Sayed, Mahmoud A. El-Toukhy

Chemical Engineering and Pilot Plant Department, National Research Centre, Giza, Egypt


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Environmental friendly adsorbents constitute an effective method for heavy metals pollution mitigation. In this work, batch adsorption experiments were conducted for the adsorption of various heavy metals including Cr, Co, Ni and Pb using cost-effective modified adsorbents. These comprise polyacrylate hydrogels prepared using microwave (M) irradiation technique (ACM) or ultrasonic (U) irradiation technique (ACU). Further blends of acrylic acid salts with Egyptian kaolin (AKM and AKU) or zeolite (AZM and AZU) were also investigated. The effect of pH and initial concentration on the performance of the composite hydrogels has been studied. Also, several adsorption isotherm and kinetic models were studied. AKU revealed the highest maximum adsorption capacities among other investigated composites for all the tested heavy metals. The equilibrium adsorption experiments revealed that Langmuir isotherm model is best fitted than other models with maximum adsorption capacities of 84.5, 73.3, 61 and 97 mg/g for Cr, Co, Ni and Pb, respectively and equivalent results were obtained from Tempkin isotherm for all ions except Ni. Adsorption kinetics of Cr, Co, Ni and Pb using all the composite hydrogels were best described with the Pseudo-second order kinetic model.

Keywords: Heavy metals, Cost-effective, Composites, Adsorption isotherm, Kinetics.

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  1. Akkaya, R., Ulusoy, U. 2011. Adsorption of lead on to poly (acrylamide-maleic acid)-based hydrogel composites, Hacettepe Journal of Biology and Chemistry, 39, 257–264.

  2. Al-Abachi, M.Q. 2013. Evaluation of poly acrylic acid (PAA) hydrogel beads as adsorbent for the removal of lead(II)ion from water, Journal of Al-Nahrain University Science, 16, 30–39.

  3. Atia, A.A., Donia, A.M., Hussin, R.A., Rashad, R.T. 2009. Swelling and metal ion uptake characteristics of kaolinite containing poly [(acrylic acid)-co-acrylamide] hydrogels, Desalination and Water Treatment, 3, 73–82.

  4. Ayawei, N., Ebelegi, A.N., Wankasi, D. 2017. Modelling and interpretation of adsorption isotherms, Journal of Chemistry, 2017, 1–11.

  5. Barakat, M.A. 2011. New trends in removing heavy metals from industrial wastewater, Arabian Journal of Chemistry, 4, 361–377.

  6. Bhatia, M., Rajulapati, S.B., Sonawane, S., Girdhar, A. 2017. Synthesis and implication of novel poly (acrylic acid)/nanosorbent embedded hydrogel composite for lead ion removal, Scientific Reports, 7, 1–16.

  7. Bulut, Y., Akçay, G., Elma, D., Serhatli, I.E. 2009. Synthesis of clay-based superabsorbent composite and its sorption capability, Journal of Hazardous Materials, 171, 717–723.

  8. Chen, F., Ye, W., Tang, Y. 2012. Adsorption of heavy metals by sodium polyacrylate-humic acid-rectorite composite as a novel adsorbent, Advanced Materials Research, 550–553, 2428–2435.

  9. Dean, J.G., Bosqui, F.L., Lanouette, K.H. 1972. Removing heavy metals from waste water, Environmental Science and Technology, 6, 518–522.

  10. Djelad, A., Morsli, A., Robitzer, M., Bengueddach, A., Di Renzo, F., Quignard, F. 2016. Sorption of Cu(II) ions on chitosan-zeolite X composites: Impact of gelling and drying conditions, Molecules, 21, 1–15.

  11. El-Kamash, A.M., Zaki, A.A., El Geleel, M.A. 2005. Modeling batch kinetics and thermodynamics of zinc and cadmium ions removal from waste solutions using synthetic zeolite A, Journal of Hazardous Materials, 127, 211–220.

  12. Elsayed, M.M. 2019. Hydrogel preparation technologies: Relevance kinetics, thermodynamics and scaling up aspects, Journal of Polymers and the Environment, 27, 871–891.

  13. Emamjomeh, M.M., Sivakumar, M. 2009. Review of pollutants removed by electrocoagulation and electrocoagulation/flotation processes, Journal of Environmental Management, 90, 1663–1679.

  14. Esalah, J.O., Weber, M.E., Vera, J.H. 1999. Removal of lead from aqueous solutions by precipitation with sodium di-(n-octyl) phosphinate, Separation and Purification Technology, 18, 25–36.

  15. Foo, K.Y., Hameed, B.H. 2010. Insights into the modeling of adsorption isotherm systems, Chemical Engineering Journal, 156, 2–10.

  16. Ghurye, G., Clifford, D., Tripp, A. 2004. Iron coagulation and direct microfiltration to remove arsenic from groundwater, American Water Works Association, 96, 143–152.

  17. Gomez-Maldonado, D., Erramuspe, I.B.V., Peresin, M.S. 2019. Natural polymers as alternative adsorbents and treatment agents for water remediation, BioResources, 14, 10093–10160.

  18. Green, D.W. 2008. Perry’s chemical engineers’ handbook, McGraw-Hill, New York.

  19. Hani, H.A. 2010. Studies on zeolites for heavy metals removal, PhD. Thesis, Faculty of Engineering, Cairo Univeristy, Egypt.

  20. He, Y., Pei, M., Xue, N., Wang, L., Guo, W. 2016a. Synthesis of sodium polyacrylate-bentonite using: In situ polymerization for Pb2+ removal from aqueous solutions, RSC Advances, 6, 48145–48154.

  21. He, S., Zhang, F., Cheng, S., Wang, W. 2016b. Synthesis of sodium acrylate and acrylamide copolymer/GO hydrogels and their effective adsorption for Pb2+ and Cd2+, ACS Sustainable Chemistry and Engineering, 4, 3948–3959.

  22. Inagaki, S., Yokoi, T., Kubota, Y., Tatsumi, T. 2007. Unique adsorption properties of organic-inorganic hybrid zeolite IEZ-1 with dimethylsilylene moieties, Chemical Communications, 1, 5188–5190.

  23. Liu, M., Li, W., Rong, J., Zhou, C. 2012. Novel polymer nanocomposite hydrogel with natural clay nanotubes, Colloid and Polymer Science, 290, 895–905.

  24. Liu, Q., Yang, B., Zhang, L., Huang, R. 2015. Adsorptive removal of Cr(VI) from aqueous solutions by cross-linked chitosan/bentonite composite, Korean Journal of Chemical Engineering, 32, 1314–1322.

  25. Mahmoud, A., Hoadley, A.F.A. 2012. An evaluation of a hybrid ion exchange electrodialysis process in the recovery of heavy metals from simulated dilute industrial wastewater, Water Research, 46, 3364–3376.

  26. Natkański, P., Białas, A., Kuśtrowski, P. 2012. The synthesis of poly (acrylic acid)-bentonite: And polyacrylamide-bentonite composites: For adsorption applications, Chemik, 66, 742–749.

  27. Nechifor, G., Pascu, D.E., Neagu, M.P., Traistaru, G.A., Albu, P.C. 2015. Comparative study of temkin and floryhuggins isotherms for adsorption of phosphate anion on membranes, UPB Scientific Bulletin, Series B: Chemistry and Materials Science, 77, 63–72.

  28. Qiu, H., Lv, L., Pan, B.C., Zhang, Q.J., Zhang, W.M., Zhang, Q.X. 2009. Critical review in adsorption kinetic models, Journal of Zhejiang University: Science A, 10, 716–724.

  29. Rafiei, H.R., Shirvani, M., Ogunseitan, O.A. 2016. Removal of lead from aqueous solutions by a poly (acrylic acid)/bentonite nanocomposite, Applied Water Science, 6, 331–338.

  30. Renu, M.A., Singh, K. 2017. Heavy metal removal from wastewater using various adsorbents: A review, Journal of Water Reuse and Desalination, 7, 387–419.

  31. Sezgin, N., Balkaya, N. 2016. Adsorption of heavy metals from industrial wastewater by using polyacrylic acid hydrogel, Desalination and Water Treatment, 57, 2466–2480.

  32. Shikuku, V.O., Kowenje, C.O., Kengara, F.O. 2018. Errors in parameters estimation using linearized adsorption isotherms: Sulfadimethoxine adsorption onto kaolinite clay, Chemical Science International Journal, 23, 1–6.

  33. Sorour, M.H., Shaalan, H.F., Hani, H.A., Sayed, E.S. 2018. Batch and dynamic investigations on magnesium separation by ion exchange adsorption: Performance and cost evaluation. 20th International Conference on Energy, Environmental and Chemical Engineering, Dubai, 1702–1711.

  34. Sorour, M.H., Tewfik, S.R., Abulnour, A.G., Shaalan, H.F., Hani, H.A., Al‐Bazedi, G.A. 2020. Development and assessment of adsorptive hydrogel: Process engineering and economic considerations, Engineering Reports, 2, 1–13.

  35. Wan Ngah, W.S., Teong, L.C., Hanafiah, M.A.K.M. 2011. Adsorption of dyes and heavy metal ions by chitosan composites: A review, Carbohydrate Polymers, 83, 1446–1456.

  36. Wang, J., Guo, X. 2020. Adsorption kinetic models: Physical meanings, applications, and solving methods, Journal of Hazardous Materials, 390, 122156.

  37. Yakout, S.M., Elsherif, E. 2010. Batch kinetics, isotherm and thermodynamic studies of adsorption of strontium from aqueous solutions onto low cost rice-straw based carbons, Carbon - Science and Technology, 3, 144–153.

  38. Yu, Y., Peng, R., Yang, C., Tang, Y. 2015. Eco-friendly and cost-effective superabsorbent sodium polyacrylate composites for environmental remediation, Journal of Materials Science, 50, 5799–5808.

  39. Yurlova, L., Kryvoruchko, A., Kornilovich, B. 2002. Removal of Ni(II) ions from wastewater by micellar-enhanced ultrafiltration, Desalination, 144, 255–260.

  40. Zhang, J., Wang, A. 2015. Polysaccharide-based composite hydrogels for removal of pollutants from water. Advanced separations by specialized sorbents, Chromatographic series, Boca Raton, CRC Press/Taylor & Francis Group.

  41. Zhao, G., Zhang, H., Fan, Q., Ren, X., Li, J., Chen, Y., Wang, X. 2010. Sorption of copper(II) onto super-adsorbent of bentonite-polyacrylamide composites, Journal of Hazardous Materials, 173, 661–668.


Received: 2021-01-13
Revised: 2021-05-23
Accepted: 2021-05-25
Publication Date: 2021-09-01

Cite this article:

Sorour, M.H., Hani, H.A., Shaalan, H.F., El Sayed, M.M., El-Toukhy, M.A. 2021. Adsorption isotherms and kinetics pertinent to modified composite hydrogel adsorbents adopted for heavy metals removal. International Journal of Applied Science and Engineering, 18, 2021013.

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