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Removal of cobalt (II) ions from aqueous solution by Peganum Harmala seeds

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Title Removal of cobalt (II) ions from aqueous solution by Peganum Harmala seeds
 
Creator Alsaiari, Raiedhah
 
Subject Adsorption
Co(II)
Heavy metal
Langmuir adsorption isotherm
Peganum harmala
Water purification
 
Description 318-324
The batch extraction of cobalt [Co(II)] ions from an aqueous solution, utilizing the seeds of Peganum harmala has been
evaluated in this study. After gathering Peganum harmala, the plants are beaten to separate the seeds, after which the seed
undergo a fine filtration process to remove any debris. The prepared adsorption material is defined by Fourier transform
infrared spectroscopy (FTIR). The adsorption process is conducted an incubator in 50 mL flasks. The studied process
variables included pH, contact time, Co(II) concentration, adsorbent dose and reaction temperature. Co(II) is assessed with
the use of a UV-vis spectrophotometer at a wavelength of 512 nm. Optimal Co(II) removal is noted at a pH of 6; increased
alkalinity resulted in the generation of cobalt hydroxide. When contact time is increased from 5 to 40 min, the removal of
Co(II) ions increased from 8 to 88%. This represented the maximum adsorption of Co(II) into Peganum harmala. After this
time, equilibrium was achieved, with no further Co(II) extraction occurring. The higher the dose of adsorbent, the higher the
degree of Co(II) ion removal; increasing the adsorbent from 0.1 to 0.4g/L result in an increase in extraction from 60 to 84%.
A larger dose of adsorbent, up to 0.5 g/L, diminished further Co(II) ion subtraction. The Langmuir adsorption isotherm show
a superior model fit compared with the Freundlich isotherm.
 
Date 2022-06-27T09:15:28Z
2022-06-27T09:15:28Z
2022-05
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/59929
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.29(3) [May 2022]