Open AccessAdsorption of heavy metal ions using activated carbon derived from Eichhornia (water hyacinth)
Author(s) -
Sami Salman,
Israa M. Rasheed,
Abbas Mohammed
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/779/1/012074
Subject(s) - freundlich equation , adsorption , activated carbon , langmuir , chemistry , fourier transform infrared spectroscopy , aqueous solution , potassium hydroxide , sorption , metal ions in aqueous solution , eichhornia crassipes , nuclear chemistry , inorganic chemistry , langmuir adsorption model , metal , chemical engineering , organic chemistry , ecology , aquatic plant , macrophyte , biology , engineering
Removal of heavy metal ions such as, cadmium ion (Cd 2+ ) and lead ion (Pb 2+ ) from aqueous solution onto Eichhornia (water hyacinth) activated carbon (EAC) by physiochemical activation with potassium hydroxide (KOH) and carbon dioxide (CO 2 ) as the activating agents were investigated. The Eichhornia activated carbon was characterized by Brunauer Emmett Teller (BET), Fourier Transform Infrared spectroscopy (FTIR), and Scanning Electron Microscopy (SEM) techniques. Whereas, the effect of adsorbent dosage, contact time of pH, and metal ion concentration on the adsorption process have been investigated using the batch process technique. The kinetic data of the adsorption were fitted with the pseudo-first order and, pseudo-second-order models as well as Langmuir and Freundlich isotherm models. The results were found to be well fitted with pseudo-second-order and Freundlich models. The results also reveal that activated carbon derived from Eichhornia was an efficient adsorbent for the adsorptive removal of heavy metal ions from solutions whereas, the maximum sorption capacities of the Pb 2+ and Cd 2+ ions were detected as 102 and 49.5 (mg/g), respectively.