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10.1016_j.biteb.2022.101045.pdf (1.13 MB)

Insights into the removal of lithium and molybdenum from groundwater by adsorption onto activated carbon, bentonite, roasted date pits, and modified-roasted date pits

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submitted on 2023-12-06, 10:24 and posted on 2023-12-06, 13:21 authored by Ayesha Y. Ahmad, Mohammad A. Al-Ghouti, Majeda Khraisheh, Nabil Zouari

This study investigated the removal of lithium (Li) and molybdenum (Mo) from groundwater using activated carbon, bentonite, roasted date pits, and modified-roasted date pits as adsorbents under different experimental parameters including pH, initial concentration, and temperature. Various adsorption isotherm models were used to determine the best-fit model for the obtained experimental data. The negative values of Gibbs energy (ΔG°) indicated a spontaneous and favorable adsorption process of the adsorption at high temperatures. The positive entropy values (ΔS°) that controlled the adsorption process suggested the possibility of some structural changes or readjustments in the adsorbate–adsorbent complex. The adsorption efficiency of Li increases at 35 °C using the four adsorbents. At 35 °C, the maximum adsorption efficiency reached 95% for AC, 94% using MDPs, 63% using bentonite, and 38% using RDPs. The modified-roasted date pits showed the highest adsorption of Mo in all real groundwater samples. The adsorption of Mo increased with the increase in concentrations, and its maximum removal at 25 °C was 80%.

Other Information

Published in: Bioresource Technology Reports
License: http://creativecommons.org/licenses/by/4.0/
See article on publisher's website: https://dx.doi.org/10.1016/j.biteb.2022.101045

Funding

Open Access funding provided by the Qatar National Library.

History

Language

  • English

Publisher

Elsevier

Publication Year

  • 2022

License statement

This Item is licensed under the Creative Commons Attribution 4.0 International License.

Institution affiliated with

  • Qatar University
  • College of Arts and Sciences - QU
  • College of Engineering - QU

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