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Kayıt Tarihi: 2021-13-Ocak
Aktif Durum: Pasif
Gönderilenler: 30
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| Gönderen: 2021-02-Subat Saat 09:11 | Kayıtlı IP
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This study was undertaken to investigate adsorption
behavior of Hg (II) from aqueous systems on activated
carboncoconu
t activated charcoal powderin static and dynamic
mode by varying initial Hg (II) concentration, adsorbent
dose and pH. Langmuir and Freundlich adsorption isotherm
were applied to model the adsorption data. Removal of
mercury obeyed the Langmuir and Freundlich adsorption
isotherm models. The extent of removal of Hg (II) was
found to be dependent on sorbent dose, pH and initial Hg
(II) concentration. Mercury uptake increased from 72 to
100 percent with increasing pH from 2 to 10. A set of
desorption studies was also performed for the metal ions
with the aim of investigating the mechanism involved.
Moreover, the competing effects of various ions like Pb
(II) and Cu (II) is also described. The column capacity
for a column diameter of 20 mm, bed height of 0.4 m,
hydraulic loading rate of 7.5 m3 h(-1) m(-2) and a feed
concentration of 3 mg l(-1) were found to be 3.02 mg
g(-1). Breakthrough curves were plotted for the
adsorption of mercury on the adsorbent using continuous-
flow column operation by varying different operating
parameters like hydraulic loading rate (3-10.5 m3 h(-1)
m(-2)), bed height (0.3-0.5 m), and feed concentrations
(2-6 mg l(-1)). The aim was to assess the effect of bed
height, hydraulic loading rate and initial feed
concentration on breakthrough time and adsorption
capacity, which helped in ascertaining the practical
applicability of the adsorbent.
activated
charcoal pellets bulk At the end an attempt has
been made to develop empirical relationship from the data
generated from column studies for designing the
adsorption column, based on the Bohart-Adams model.
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Konu: Mercury (II) removal from water by CSAC
