Study of cyanide wastewater treatment by dispersion supported liquid membrane using trioctylamine and kerosene as liquid membrane
- 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：分散型支撑液膜；氰化废水；三正辛铵，英文关键字：Dispersion Supported Liquid Membrane;cyanide waste
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Abstract:
A certain amount of cyanide is presented in wastewater of various industrial production, such as wet extraction of gold, coal processing, electroplating and other industries. In this work, an experimental study regarding transport of cyanide through Dispersion Supported Liquid Membrane (DSLM) was performed. Trioctylamine (TOA) and kerosene as liquid membrane, supported liquid membrane separation process mass transfer kinetics equations were deduced. Through mass transfer kinetic equation was derived , when the carrier concentration was under certain condition, there was a linear relationship between the 1/Pc and c_(H^+)^n, and the parameters Δa and Δo could be obtained from the slope and intercept of the straight line, then the diffusion coefficient do and the diffusion layer thickness δo of the phase interface between feed phase and membrane phase could be calculated.
Factors affecting migration of CN (I) were analyzed, and the stable removal rate of CN (I) was more than 90% with carrier concentration (%TOA) of 2%, feed phase pH of 4, initial CN (I) concentration of 30mg/L, stirring time of 1h, volume ratio of O/S of 2:1, strip phase concentration of 2mol/L. The results showed that the overall mass transfer rate increased first and then decreased with an increase of TOA concentration, organic-to-strip volume ratio, and strip concentration. Furthermore, the transport percentage of CN (I) was increased, the stability of membrane was enhanced, and the lifetime of the membrane was extended.
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Note:
李国平
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Co-author:
XueJuanQin,YuLiHua,LiuNiNa
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First Author:
liguoping
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Indexed by:
Journal paper
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Volume:
卷：72
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Issue:
期：4
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Page Number:
页：643-650
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Translation or Not:
no
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Date of Publication:
2015-04-01
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