Removal and recovery of heavy metals from wastewaters by supported liquid membranes

2001 ◽  
Vol 43 (2) ◽  
pp. 341-348 ◽  
Author(s):  
X. J. Yang ◽  
A. G. Fane ◽  
S. MacNaughton
Keyword(s):  
Heavy Metals ◽  
Liquid Membrane ◽  
Chemical Precipitation ◽  
Precipitation Process ◽  
Liquid Membranes ◽  
Supported Liquid Membranes ◽  
In Series ◽  
Membrane Carriers ◽  
Very High ◽  
Removal And Recovery

The removal and recovery of Cu, Cr and Zn from plating rinse wastewater using supported liquid membranes (SLM) are investigated. SLMs with specific organic extractants as the liquid membrane carriers in series are able to remove and concentrate heavy metals with very high purity, which is very promising for recycling of heavy metals in the electroplating industry. A technical comparison between the membrane process and the conventional chemical precipitation process was made.

Supported liquid membranes for removal and recovery of metals from waste waters and process streams

2001 ◽  
Vol 20 (2) ◽  
pp. 117-121 ◽  
Author(s):  
W. S. Winston Ho ◽  
Bing Wang ◽  
Travis E. Neumuller ◽  
Justin Roller
Keyword(s):  
Liquid Membranes ◽  
Waste Waters ◽  
Supported Liquid Membranes ◽  
Removal And Recovery

An overview on nanostructure-modified supported liquid membranes for the electromembrane extraction method

2022 ◽  
Author(s):  
Mir Saleh Hoseininezhad-Namin ◽  
Elaheh Rahimpour ◽  
Sibel Aysil Ozkan ◽  
Abolghasem Jouyban
Keyword(s):  
Extraction Method ◽  
Liquid Membrane ◽  
Supported Liquid Membrane ◽  
Liquid Membranes ◽  
Supported Liquid Membranes ◽  
Electromembrane Extraction

The efficiency of electromembrane extraction can be improved by modification of supported liquid membrane with various nanomaterials.

scholarly journals Pertraction of Co(II) through Novel Ultrasound Prepared Supported Liquid Membranes Containing D2EHPA. Optimization and Transport Parameters

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 436
Author(s):  
Gerardo León ◽  
Asunción María Hidalgo ◽  
Beatriz Miguel ◽  
María Amelia Guzmán
Keyword(s):  
Boundary Layer ◽  
Sulfuric Acid ◽  
Carrier Concentration ◽  
Liquid Membrane ◽  
Supported Liquid Membrane ◽  
Liquid Membranes ◽  
Membrane Phase ◽  
Experimental Conditions ◽  
Supported Liquid Membranes ◽  
Aqueous Feed

Pertraction of Co(II) through novel supported liquid membranes prepared by ultrasound, using bis-2-ethylhexyl phosphoric acid as carrier, sulfuric acid as stripping agent and a counter-transport mechanism, is studied in this paper. Supported liquid membrane characterization through scanning electron microscopy, energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy shows the impregnation of the microporous polymer support by the membrane phase by the action of ultrasound. The effect on the initial flux of Co(II) of different experimental conditions is analyzed to optimize the transport process. At these optimal experimental conditions (feed phase pH 6, 0.5 M sulfuric acid in product phase, carrier concentration 0.65 M in membrane phase and stirring speed of 300 rpm in both phases) supported liquid membrane shows great stability. From the relation between the inverse of Co(II) initial permeability and the inverse of the square of carrier concentration in the membrane phase, in the optimized experimental conditions, the transport resistance due to diffusion through both the aqueous feed boundary layer (3.7576 × 104 s·m−1) and the membrane phase (1.1434 × 1010 s·m−1), the thickness of the aqueous feed boundary layer (4.0206 × 10−6 m) and the diffusion coefficient of the Co(II)-carrier in the bulk membrane (4.0490 × 10−14 m2·s−1), have been determined.

Supported liquid membrane system for Cr(III) separation from Cr(III)/Cr(VI) mixtures

2014 ◽  
Vol 69 (12) ◽  
pp. 2476-2481 ◽  
Author(s):  
P. Religa ◽  
J. Rajewski ◽  
P. Gierycz ◽  
R. Świetlik
Keyword(s):  
Liquid Membrane ◽  
Membrane System ◽  
Liquid Membranes ◽  
Phase Mixing ◽  
Chromium Vi ◽  
Supported Liquid Membranes ◽  
Carrier Interaction ◽  
Oxidation Properties ◽  
Feed Phase ◽  
Phase Surface

This paper presents the results of analyses of the chromium(III) transport process from mixtures of Cr(III)/Cr(VI) ions using supported liquid membranes (SLM), in which dinonylnaphthalene sulfonic acid (DNNSA) and di(2-ethylhexyl) phosphoric acid (D2EHPA) were used as carriers. In both cases the membrane worked as a selective barrier for Cr(VI) ions. The increase in both the time of Cr(VI) ions–carrier interaction and the Cr(VI) concentration in the feed phase negatively influenced the Cr(III) separation. The polarizing layer consisting of Cr(VI) ions prevents the access of Cr(III) ions to the inter phase surface and leads to the deactivation of the carrier, which is the result of the strong oxidation properties of Cr(VI) ions. These factors meant that, in the case of the membrane with DNNSA, the membrane could not be used for the effective separation of Cr(III) from the Cr(III)/Cr(VI) mixture. On the other hand, the membrane with D2EHPA can be used for fast and efficient transport of Cr(III) ions, but only for strictly defined process parameters, i.e. where the level of chromium(VI) concentration is below 10−3M and with intensive feed phase mixing.

Sign in / Sign up

Export Citation Format

Share Document