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Heavy metal ions (lead, cobalt, and nickel) biosorption from aqueous solution onto activated carbon prepared from Citrus limetta leaves

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2020, 30(6), pp.683-698
  • DOI : 10.1007/s42823-020-00141-1
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : August 24, 2019
  • Accepted : March 31, 2020
  • Published : December 1, 2020

Aboli Elham 1 Jafari Dariush 2 Esmaeili Hossein 2

1Kherad Institute of Higher Education
2Islamic Azad University

Accredited

ABSTRACT

In this research, Pb (II), Co (II), and Ni (II) toxic heavy metal ions adsorption from synthetic aqueous system have been studied using the activated carbon prepared from Citrus limetta leaves. Therefore, the relationship between the adsorption parameters (solution pH, dosage of adsorbent, temperature, initial concentration of the ions, and adsorption time) and the removal percentage of the prepared adsorbent have been investigated. Additionally, the adsorbent was analyzed through BET, SEM, EDX, FTIR, and XRD analyses. According to the results, the maximal adsorption efciencies for heavy metal ions were achieved in pH=6, the adsorbent dosage of 1 g/L, temperature=25 °C, the ion initial concentration of 5 mg/L, and contact time of 60 min, which were 99.53%, 98.63%, and 97.54% for Pb, Co, and Ni ions, respectively. Based on Kinetic studies, the performance of pseudo-second-order kinetic model was better than pseudo-frst-order model for the description of time-dependent behavior of the process. Additionally, the equilibrium data were ftted by Langmuir and Freundlich iso�therms, while the former performed better than the latter. The maximum adsorption capacity values for Pb, Co, and Ni ions were achieved equal to 69.82, 60.60, 58.139 mg/g, respectively. Considering the thermodynamic data, the studied processes were exothermic and spontaneous.

Citation status

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Total Citation Counts(KCI+WOS) (29) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (40) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

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