Removal of Ni(II) and Zn(II) from Aqueous Media Using Algae-Sodium Bentonite Nanocomposite

  • Tanveer RasoolEmail author
  • Waris Baba
Part of the Green Energy and Technology book series (GREEN)


The composite made by mixing dead Spirogyra algal biomass with nano-bentonite clay, was used to study the adsorption of Ni(II) and Zn(II) as a function of pH, contact time, adsorbent dosage and initial ion concentration. An average crystal size of the composite synthesized was found to be 34.11 nm. The optimum temperature for maximum adsorption was found at 328 and 313 K for Ni(II) and Zn(II), respectively, in the pH range of 5–6. The results were achieved for the absorbent dosage between 0.1–0.3 gms per 100 ml of the solution. A decreasing trend was observed for adsorption capacity by the composite with maximum value at 0.1 gm dosage for both the metal ions. In contrary, an increasing trend in adsorption was observed in the concentration range while changing the metal ion concentration from 25 to 150 mg/l. Within the range of optimized parameters calculated, the maximum percentage recovery was found to be 108.67 mg/g (81%) and 100.78 mg/g (77%) for Ni(II) and Zn(II), respectively. Langmuir adsorption isotherm and pseudo second order models were best fit for equilibrium data, highlighting the potential of Algae-bentonite composite as possible feed stock for adsorption of heavy metals from aqueous media.


Nano composite Adsorption Algae Optimization 


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© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Department of Chemical EngineeringNational Institute of Technology SrinagarSrinagarIndia

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