Mercury removal from aqueous solutions by palm leaves adsorbent

Document Type: Original Article


1 Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran

2 Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran

3 Department of Environmental Health Engineering, School of Public Health, Kurdistan University of Medical Sciences, Kurdistan, Iran


Mercury is a carcinogenic and teratogenic compound that tends to accumulate in water solutions. In this research, the removal of mercury from an aqueous solution was evaluated by using palm leaves. Experiments were performed to study the adsorption efficiency, the effect of the adsorbent amount, the balance time, the adsorbate concentration, and the pH on mercury removal. The experimental apparatus used was a batch stirred reactor (volume: 1m3). The study was conducted under almost isothermal conditions. The test results showed that the optimum adsorbate concentration was 2 g/l, the balance time was three hours, the optimum adsorbent concentration was 15 mg/l, and the pH was 6. The maximum efficiency obtained was 99.24%. The chemical compounds with the highest presence in the palm leaves were LoI (93.76%), and SiO2 (4.1%), whereas the compound with the lowest presence was Na2O (0.08%). The mercury removal efficiency increased with an increase in the adsorbent dose and the contact time, and reduced with an increase in the initial mercury concentration. The Freundlich model, using the variables provided in the study, predicted the change in the adsorption kinetics.


  1. Campanella L, Cardarelli E, Ferri T, Petronio B. Mercury removal from petrochemical wastes. Water Res 1986; 20(1): 63-65.
  2. Aydın YA, Aksoy ND. Adsorption of chromium on chitosan: Optimization, kinetics and thermodynamics. Chem. Eng. J 2009; 151(1): 188-194.
  3. Wahby A, Abdelouahab-Reddam Z, El Mail R, et al. Mercury removal from aqueous solution by adsorption on activated carbons prepared from olive stones. Adsorption .2011; 17(3): 603-609.
  4. Almasi A, Dargahi A, Amrane A, Fazlzadeh M, Mahmoudi M, Hashemian A. Effect of the retention time and the phenol concentration the stabilization pond efficiency in the treatment of oil refinery wastewater. Fresenius environmental bulletin 2014; 23(10a): 2541-2548.
  5. Almasi A, Mohammadi M, Atafar Z, Azizi A, Amirian F, Dargahi A. Study the Efficiency of Processed Walnut Bark Powder for Methylene Blue Color Removal from Aqueous Solutions. Der Pharma Chemica  2016, 8(13): 253-257.
  6. Shafeeq A, Muhammad A, Sarfraz W, Toqeer A, Rashid S, Rafiq M. Mercury removal techniques for industrial waste water. World Acad. Sci. Eng. Technol 2012; 6: 12-26.
  7. Bessbousse H, Rhlalou T, Verchère J-F, Lebrun L. Mercury removal from wastewater using a poly (vinylalcohol)/poly (vinylimidazole) complexing membrane. Chem.Eng. J 2010; 164(1): 37-48.
  8. Dargahi A, Gholestanifar H, Darvishi P, Karami A, Hasan SH, Poormohammadi A, et al. An investigation and comparison of removing heavy metals (lead and chromium) from aqueous solutions using magnesium oxide nanoparticles. Pol. J. Environ. Stud 2016; 25(2): 557-562.
  9. Zabihi M, Asl AH, Ahmadpour A. Studies on adsorption of mercury from aqueous solution on activated carbons prepared from walnut shell. J. hazard. mater 2010; 174(1): 251-256.
  10. Miretzky P, Cirelli AF. Hg (II) removal from water by chitosan and chitosan derivatives: a review. J. hazard. mater 2009; 167(1): 10-23.
  11. Mohsen-Nia M, Montazeri P, Modarress H. Removal of Cu 2+ and Ni 2+ from wastewater with a chelating agent and reverse osmosis processes. Desalination 2007; 217(1): 276-281.
  12. Godini H, Dargahi A, Mohammadi M, Ahagh MH, Mohammadi S, Jalilian Z. Application of Response Surface Methodology for Optimization of Ammonia Nitrogen Removal from Aqueous Solutions Using Powdered Activated Carbon. Research Journal of Environmental Sciences 2017; 11 (1): 36-47.
  13. Inbaraj BS, Sulochana N. Mercury adsorption on a carbon sorbent derived from fruit shell of Terminalia catappa. J. hazard. mater 2006; 133(1): 283-290.
  14. Shafaei A, Ashtiani FZ, Kaghazchi T. Equilibrium studies of the sorption of Hg (II) ions onto chitosan. Chem. Engin. J 2007; 133(1): 311-316.
  15. Ghorbani F, Sanati A, Younesi H, Ghoreyshi A. The potential of date-palm leaf ash as low-cost adsorbent for the removal of Pb (II) ion from aqueous solution. Int. J. Eng. Trans. Appl 2012; 25(4): 269.
  16. Garg U, Kaur M, Jawa G, Sud D, Garg V. Removal of cadmium (II) from aqueous solutions by adsorption on agricultural waste biomass. J. hazar. mater 2008; 154(1): 1149-1157.
  17. Kaur R, Singh J, Khare R, Cameotra SS, Ali A. Batch sorption dynamics, kinetics and equilibrium studies of Cr (VI), Ni (II) and Cu (II) from aqueous phase using agricultural residues. Applied Water Science 2013; 3(1): 207-218.
  18. Das G, Pradhan N, Madhu G, Preetham H. Removal of cadmium from aqueous streams by Zeolite synthesized from fly ash. JMES 2013; 4(3): 410-419.
  19. Seyd Mohammadi A, Asgari G, Dargahi A, Mobarakian SA. Equilibrium and synthetic equations for index removal of methylene blue using activated carbon from oak fruit bark. J. Mazandaran Uni Med Sci 2015; 24 (121): 172-187.
  20. Li Y, Wang J-d, Wang X-j, Wang J-f. Adsorption–desorption of Cd (II) and Pb (II) on Ca-montmorillonite. Ind. Eng. Chem. Res 2012; 51(18): 6520-6528.
  21. Mohan D, Sarswat A, Ok YS, Pittman CU. Organic and inorganic contaminants removal from water with biochar, a renewable, low cost and sustainable adsorbent–a critical review. Bioresour. Technol 2014; 160: 191-202.
  22. Naiya TK, Bhattacharya AK, Das SK. Adsorption of Cd (II) and Pb (II) from aqueous solutions on activated alumina. Adv. Colloid Interface Sci. 2009; 333(1): 14-26.
  23. Alavi SN, Pariz Z, Dargahi A, Mohamadi M. Evaluation the palm leaves efficiency as a natural adsorbent for removing cadmium from aqueous solution: isotherm adsorption study. IJ PT 2016; 8(2): 13919-13929.
  24. Ding Y, Jing D, Gong H, Zhou L, Yang X. Biosorption of aquatic cadmium (II) by unmodified rice straw. Bioresour. Technol 2012; 114: 20-25.
  25. Atar N, Olgun A, Wang S. Adsorption of cadmium (II) and zinc (II) on boron enrichment process waste in aqueous solutions: batch and fixed-bed system studies. Chem, Eng. J 2012; 192: 1-7.
  26. Örnek A, Özacar M, Şengil İA. Adsorption of lead onto formaldehyde or sulphuric acid treated acorn waste: equilibrium and kinetic studies. Biochem. Eng. J 2007; 37(2): 192-200.
  27. Madrakian T, Afkhami A, Ahmadi M, Bagheri H. Removal of some cationic dyes from aqueous solutions using magnetic-modified multi-walled carbon nanotubes. J.hazar. mater 2011; 196: 109-114.
  28. Saadatjou N, Rasoulifard M, Heidari A. Removal of Basic Red 46 using low-cost adsorbent of hardened paste of portland cement from contaminated water. J Color Sci Tech 2009; 2(4): 221-226.
  29. Godini H, Dargahi A, Mohammadi M, Shams Khorramabadi GH, Azizi A, Tabandeh L, Jalilian Z. Efficiency of Powdery Activated carbon in Ammonia-Nitrogen Removal from Aqueous Environments (Response Surface Methodology). Arch Hyg Sci 2017; 6(2): 111-120
  30. Agarwal H, Sharma D, Sindhu SK, Tyagi S, Ikram S. Removal of mercury from wastewater use of green adsorbents–a review. Electron. J. Environ. Agric. Food Chem. 2010; 9(9): 1551-1558.
  31. Li X-m, Zheng W, Wang D-b, et al. Removal of Pb (II) from aqueous solutions by adsorption onto modified areca waste: Kinetic and thermodynamic studies. Desalination 2010; 258(1): 148-153.
  32. Ngah WW, Hanafiah MAKM. Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbents: a review. Bioresour. Technol 2008; 99(10): 3935-3948.
  33. Gerente C, Lee V, Cloirec PL, McKay G. Application of chitosan for the removal of metals from wastewaters by adsorption—mechanisms and models review. Crit. Rev. Env. Sci. Technol 2007; 37(1): 41-127.
  34. He J, Lu Y, Luo G. Ca (II) imprinted chitosan microspheres: an effective and green adsorbent for the removal of Cu (II), Cd (II) and Pb (II) from aqueous solutions. Chem. Eng.J 2014; 244: 202-208.
  35. Green-Ruiz C. Mercury (II) removal from aqueous solutions by nonviable Bacillus sp. from a tropical estuary. Bioresour.Technol 2006; 97(15): 1907-1911.
  36. Aranda-García E, Cristiani-Urbina M, Pineda-Camacho G, Cristiani-Urbina E. Nickel (II) biosorption by acorn shell of Quercus crassipes humb. & bonpl. J. Biotechnol 2010; 150: 233.
  37. Ossman ME, Mansour MS. Removal of Cd (II) ion from wastewater by adsorption onto treated old newspaper: kinetic modeling and isotherm studies. IJIC. 2013; 4(1): 13.
  38. Malarvizhi T, Santhi T. Removal of Ni (II) ions from aqueous solution onto lignite fired fly ash. Res. J. Chem.  Environ 2013; 17(3): 10-18.