References

1. D.S. Malik, C. Kumar Jain, A. Kumar Yadav, Heavy metal removal by fixed-bed column – a review, ChemBioEng Rev., 5 (2018) 173–179.
2. N. Sazali, Z. Harun, N. Sazali, A review on batch and column adsorption of various adsorbent towards the removal of heavy metal, J. Adv. Res. Fluid Mech. Therm. Sci., 67 (2020) 66–88.
3. S. Łukasz, J. Ulatowska, I. Polowczyk, Copper(II) ions removal from model galvanic wastewater by green one-pot synthesised amino-hypophosphite polyampholyte, J. Hazard. Mater., 436 (2022) 129047, doi: 10.1016/j.jhazmat.2022.129047.
4. R.A. Festa, D.J. Thiele, Copper: an essential metal in biology, Curr. Biol., 21 (2011) R877–R883.
5. M. Jaishankar, T. Tseten, N. Anbalagan, B.B. Mathew, K.N. Beeregowda, Toxicity, mechanism and health effects of some heavy metals, Interdiscip. Toxicol., 7 (2014) 60–72.
6. M. Arbabi, N. Golshani, Removal of copper ions Cu(II) from industrial wastewater: a review of removal methods, Int. J. Epidemiol., 3 (2016) 283–293.
7. N.A.A. Qasem, R.H. Mohammed, D.U. Lawal, Removal of heavy metal ions from wastewater: a comprehensive and critical review, npj Clean Water, 4 (2021) 36, doi: 10.1038/s41545-021-00127-0.
8. V. Krstić, T. Urošević, B. Pešovski, A review on adsorbents for treatment of water and wastewaters containing copper ions, Chem. Eng. Sci., 192 (2018) 273–287.
9. O.A. Titi, O.S. Bello, An overview of low cost adsorbents for copper(II) ions removal, J. Biotechnol. Biomater., 5 (2015) 1000177, doi: 10.4172/2155-952X.1000177.
10. N.H. Ab Hamid, M.I.H. bin Mohd Tahir, A. Chowdhury, A.H. Nordin, A.A. Alshaikh, M.A. Suid, N. ‘Izzah Nazaruddin, N.D. Nozaizeli, S. Sharma, A.I. Rushdan, The current stateof- art of copper removal from wastewater: a review, Water, 14 (2022) 3086, doi: 10.3390/w14193086.
11. S.A. Al-Saydeh, M.H. El-Naas, S.J. Zaidi, Copper removal from industrial wastewater: a comprehensive review, J. Ind. Eng. Chem., 56 (2017) 35–44.
12. F. Fu, Q. Wang, Removal of heavy metal ions from wastewaters: a review, J. Environ. Manage., 92 (2011) 407–418.
13. Y. Zhu, W. Fan, T. Zhou, X. Li, Removal of chelated heavy metals from aqueous solution: a review of current methods and mechanisms, Sci. Total Environ., 678 (2019) 253–266.
14. Y.K. Chang, J.E. Chang, T.T. Lin, Y.M. Hsu, Integrated coppercontaining wastewater treatment using xanthate process, J. Hazard. Mater., 94 (2002) 89–99.
15. P.C.C. Siu, L.F. Koong, J. Saleem, J. Barford, G. McKay, Equilibrium and kinetics of copper ions removal from wastewater by ion exchange, Chin. J. Chem. Eng., 24 (2016) 94–100.
16. N. Samadi, R. Ansari, B. Khodavirdilo, Removal of copper ions from aqueous solutions using polymer derivations of poly(styrene-alt-maleic anhydride), Egypt. J. Pet., 26 (2017) 375–389.
17. H. Mokhtar, N.S. Muhamad, N.A.A. Rahman, A. Ayob, S.A. Ishak, Copper ions removal by PSF-Si spiral wound membranes of different porosity, IOP Conf. Ser.: Earth Environ. Sci., 920 (2021) 012015,
    doi: 10.1088/1755-1315/920/1/012015.
18. A. Chougui, K. Zaiter, A. Belouatek, B. Asli, Heavy metals and color retention by a synthesized inorganic membrane, Arabian J. Chem., 7 (2014) 817–822.
19. A. Nqombolo, A. Mpupa, R.M. Moutloali, P.N. Nomngongo, Wastewater Treatment Using Membrane Technology, T. Yonar, Eds., Wastewater and Water Quality, IntechOpen, Croatia, Rijeka, 2018, pp. 29–40.
20. A. Prasetyaningrum, D. Ariyanti, W. Widayat, B. Jos, Copper and lead ions removal by electrocoagulation: process performance and implications for energy consumption, Int. J. Renewable Energy Dev., 10 (2021) 415–424.
21. Z. Al-Qodah, M. Al-Shannag, Heavy metal ions removal from wastewater using electrocoagulation processes: a comprehensive review, Sep. Sci. Technol., 52 (2017) 2649–2676.
22. K. Kim, R. Candeago, G. Rim, D. Raymond, A.-H.A. Park, X. Su, Electrochemical approaches for selective recovery of critical elements in hydrometallurgical processes of complex feedstocks, iScience, 24 (2021) 102374, doi: 10.1016/j.isci.2021.102374.
23. R. Shrestha, S. Ban, S. Devkota, S. Sharma, R. Joshi, A.P. Tiwari, H.Y. Kim, M.K. Joshi, Technological trends in heavy metals removal from industrial wastewater: a review, J. Environ. Chem. Eng., 9 (2021) 105688, doi: 10.1016/j.jece.2021.105688.
24. N. Danesh, M. Ghorbani, A. Marjani, Separation of copper ions by nanocomposites using adsorption process, Sci. Rep., 11 (2021) 1676, doi: 10.1038/s41598-020-80914-w.
25. P. Senthil Kumar, R. Gayathri, B. Senthil Rathi, A review on adsorptive separation of toxic metals from aquatic system using biochar produced from agro-waste, Chemosphere, 285 (2021) 131438, doi: 10.1016/j.chemosphere.2021.131438.
26. Q. Wang, S. Zhu, C. Xi, F. Zhang, A review: adsorption and removal of heavy metals based on polyamide-amines composites, Front. Chem., 10 (2022) 814643, doi: 10.3389/fchem.2022.814643.
27. X. Zeng, G. Zhang, J. Zhu, Z. Wu, Adsorption of heavy metal ions in water by surface functionalized magnetic composites: a review, Environ. Sci. Water Res. Technol., 8 (2022) 907–925.
28. M. Ince, O.K. Ince, An overview of adsorption technique for heavy metal removal from water/wastewater: a critical review, Int. J. Pure Appl. Sci., 3 (2017) 10–19.
29. A.R. Hidalgo-Vázquez, R. Alfaro-Cuevas-Villanueva, L. Márquez-Benavides, R. Cortés-Martínez, Cadmium and lead removal from aqueous solutions using pine sawdust as biosorbent, J. Appl. Sci. Environ. Sanit., 6 (2011) 447–462.
30. A. Maleki, B. Hayati, F. Najafi, F. Gharibi, S.W. Joo, Heavy metal adsorption from industrial wastewater by PAMAM/TiO₂ nanohybrid: preparation, characterization and adsorption studies, J. Mol. Liq., 224 (2016) 95–104.
31. F.L. Aranda, A. Gayoso, V. Palma-Onetto, B.L. Rivas, Removal of copper ions from aqueous solutions by using resins from Pinus radiate bark resins, J. Chil. Chem. Soc., 67 (2022) 5403–5407.
32. L. Alcaraz, I. Garcia-Diaz, F.J. Alguacil, F.A. Lopez, Removal of copper ions from wastewater by adsorption onto a green adsorbent from winemaking wastes, BioResources, 15 (2020) 1112–1133.
33. M. Gupta, H. Gupta, D.S. Kharat, Adsorption of Cu(II) by low cost adsorbents and the cost analysis, Environ. Technol. Innovation, 10 (2018) 91–101.
34. G.V.S.R. Pavan Kumar, K.A. Malla, B. Yerra, K. Srinivasa Rao, Removal of Cu(II) using three low‑cost adsorbents and prediction of adsorption using artificial neural networks, Appl. Water Sci., 9 (2019) 44, doi: 10.1007/s13201-019-0924-x.
35. R. Chakraborty, A. Asthana, A. Kumar Singh, B. Jain, A.B. Hasan Susan, Adsorption of heavy metal ions by various low-cost adsorbents: a review, Int. J. Environ. Anal. Chem., 102 (2022) 342–379.
36. P.K. Omre, S. Singh, S. Singh, Waste utilization of fruits and vegetables-a review, South Asian J. Food Technol. Environ., 4 (2018) 605–615.
37. L. Sánchez-Ponce, M. Díaz-de-Alba, M.J. Casanueva-Marenco, J. Gestoso-Rojas, M. Ortega-Iguña,
    M.D. Galindo-Riaño, M.D. Granado-Castro, Potential use of low-cost agri-food waste as biosorbents for the removal of Cd(II), Co(II), Ni(II) and Pb(II) from aqueous solutions, Separations, 9 (2022) 309, doi: 10.3390/separations9100309.
38. N.H. Solangi, J. Kumar, S.A. Mazari, S. Ahmed, N. Fatima, N.M. Mubarak, Development of fruit waste derived bioadsorbents for wastewater treatment: a review, J. Hazard. Mater., 416 (2021) 125848, doi: 10.1016/j.jhazmat.2021.125848.
39. S.V. Tran, K.M. Nguyen, H.T. Nguyen, A.I. Stefanakis, P.M. Nguyen, In: A. Stefanakis, I. Nikolaou, Circular Economy and Sustainability, Elsevier Inc., All, India, Vol. 2, 2022, pp. 491–507.
40. G.M. Daraban, L. Rusu, R.M. Dinica, M. Roşca, M. Badeanu, M.D.I. Mihaila, D. Suteu, Exploring the antioxidant and bioinsecticidal activity of spontaneous flora vegetal extracts for plant protection and prevention of soil contamination, Separations, 9 (2022) 260, doi: 10.3390/separations9090260.
41. G.M. Daraban, C. Zaharia, L. Rusu, A.C. Puitel, M. Badeanu, D. Suteu, Ultrasonic extraction for preparation of plant extracts with bioinsecticidal effects on pest from seed deposits, STUDIA UBB CHEMIA, LXVI, 2 (2021) 309–324.
42. G.M. Daraban, C. Zaharia, D. Suteu, A. Puitel, R.E. Tataru- Farmus, M. Badeanu, Preliminary evaluation of vegetal extract characteristics from spontaneous flora of Moldova area (Romania), Rom. Biotechnol. Lett., 26 (2021) 2594–2605.
43. H. Patel, Comparison of batch and fixed bed column adsorption: a critical review, Int. J. Environ. Sci. Technol., 19 (2022) 10409–10426.
44. N. Ayawei, A.N. Ebelegi, D. Wankasi, Modelling and interpretation of adsorption isotherms, J. Chem., 2017 (2017) 3039817, doi: 10.1155/2017/3039817.
45. K.M. Doke, E.M. Khan, Adsorption thermodynamics to clean up wastewater; critical review, Rev. Environ. Sci. Biotechnol., 12 (2013) 25–44.
46. A. Tanasa, A.C. Puitel, C. Zaharia, D. Suteu, Sorption of reactive dyes from aqueous media using the lavender waste as biosorbent, Desal. Water Treat., 236 (2021) 348–358.
47. A. Tanasa, D. Suteu, Biovegetal wastes used as biosorbent for removal of chemical pollutants from wastewater, Res. J. Agric. Sci., 53 (2021) 227–232.
48. J. Cai, Y. He, X. Yu, S.W. Banks, Y. Yang, X. Zhang, Y. Yu, R. Liu, A.V. Bridgwater, Review of physicochemical properties and analytical characterization of lignocellulosic biomass, Renewable Sustainable Energy Rev., 76 (2017) 309–322.
49. K.Y. Foo, B.H. Hameed, Insights into the modeling of adsorption isotherm systems, Chem. Eng. J., 156 (2010) 2–10.
50. W.C. Li, F.Y. Law, Y.H.M. Chan, Biosorption studies on copper(II) and cadmium(II) using pretreated rice straw and rice husk, Environ. Sci. Pollut. Res., 24 (2017) 8903–8915.
51. P. Sepúlveda, O. Pavez, P. Tume, B. Sepúlveda, Biosorption of copper ions with olive pomace and walnut shell, Environ. Geochem. Health, (2022), doi: 10.1007/s10653-022-01303-y.
52. S. Larous, A.-H. Meniai, M. Bencheikh Lehocine, Experimental study of the removal of copper from aqueous solutions by adsorption using sawdust, Desalination, 185 (2005) 483–490.
53. S. Chakravarty, S. Pimple, H.T. Chaturvedi, S. Singh, K.K. Gupta, Removal of copper from aqueous solution using newspaper pulp as an adsorbent, J. Hazard. Mater., 159 (2008) 396–403.
54. S. Rathnakumar, R.Y. Sheeja, T. Murugesan, Removal of copper(II) from aqueous solutions using teak (Tectona grandis L.f) leaves, Int. J. Civ. Mech. Eng., 3 (2009) 433–437.
55. N.E. Dávila-Guzmán, F. de Jesús Cerino-Córdova, E. Soto-Regalado, J.R. Rangel-Mendez, P.E. Díaz-Flores, M.T. Garza-Gonzalez, J.A. Loredo-Medrano, Copper biosorption by spent coffee ground: equilibrium, kinetics, and mechanism, CLEAN – Soil Air Water, 41 (2013) 557–564.
56. A. Ronda, M.Á. Martín-Lara, G. Blázquez, N.M. Bachs, M. Calero, Copper biosorption in the presence of lead onto olive stone and pine bark in batch and continuous systems, Environ. Prog. Sustainable Energy, 33 (2013) 192–204.
57. M. Calero, F. Hernáinz, G. Blázquez, E. Dionisio-Ruiz, M.A. Martín-Lara, Evaluation of copper biosorption almond shells, Afinidad-Barcelona, 68 (2011) 274–284.
58. M. Khormaei, B. Nasernejad, M. Edrisi, T. Eslamzadeh, Copper biosorption from aqueous solutions by sour orange residue, J. Hazard. Mater., 149 (2007) 269–274.
59. A. Özer, D. Özer, A. Özer, The adsorption of copper(II) ions on to dehydrated wheat bran (DWB): determination of the equilibrium and thermodynamic parameters, Process Biochem., 39 (2004) 2183–2191.
60. Y.S. Ho, C.T. Huang, H.W. Huang, Equilibrium sorption isotherm for metal ions on tree fern, Process Biochem., 37 (2002) 1421–1430.
61. A. Saeed, M. Waheed Akhter, M. Iqbal, Removal and recovery of heavy metals from aqueous solution using papaya wood as a new biosorbent, Sep. Purif. Technol., 45 (2005) 25–31.