Treatment of cyanide wastewater by bulk liquid membrane using tricaprylamine as a carrier
- Release time:2024-08-09
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Affiliation of Author(s):
化学与化工学院
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Journal:
Water Science and Technology（SCI）
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Key Words:
中文关键字：大块液膜，氰化废水，传输动力学，三正辛胺，英文关键字：bulk liquid membrane, cyanide wastewater, transpor
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Abstract:
The transport of cyanide from wastewater through a bulk liquid membrane (BLM) containing
tricaprylamine (TOA) as a carrier was studied. The effect of cyanide concentration in the feed
solution, TOA concentration in the organic phase, the stirring speed, NaOH concentration in the
stripping solution and temperature on cyanide transport was determined through BLM. Mass transfer
of cyanide through BLM was analyzed by following the kinetic laws of two consecutive irreversible
first-order reactions, and the kinetic parameters (k1, k2, Rmax
m , tmax, Jmax
a , Jmax
d ) were also calculated.
Apparently, increase in membrane entrance (k1) and exit rate (k2) constants was accompanied by a
rise in temperature. The values of activation energies were obtained as 35.6 kJ/mol and 18.2 kJ/mol
for removal and recovery, respectively. These values showed that both removal and recovery steps in
cyanide transport is controlled by the rate of the chemical complexation reaction. The optimal
reaction conditions were determined by BLM using trioctylamine as the carrier: feed phase: pH 4,
carrier TOA possession ratio in organic phase: 2% (V/V), stripping phase concentration of NaOH: 1%
(W/V), reaction time: 60 min, stirring speed: 250 r/min. Under the above conditions, the removal rate
was up to 92.96%. The experiments demonstrated that TOA was a good carrier for cyanide transport
through BLM in this study.
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Note:
李国平
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Co-author:
刘妮娜
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First Author:
yulihua,xuejuanqin,liguoping
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Indexed by:
Journal paper
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Volume:
卷：73
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Issue:
期：12
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Page Number:
页：2888-2895
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Translation or Not:
no
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Date of Publication:
2016-11-01
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