Abstract
This work focuses on the study of the mass transfer of arsenic(V) through asymmetric polyvinylidene fluoride hollow-fiber membrane contactors using Aliquat-336 as an extractant. In the first part of this work, the fibers were prepared and characterized by SEM and by determining their thickness and porosity. From SEM pictures, an asymmetric structure was obtained that was characterized by an inner sponge-like structure and outer finger-like structure with a pore radius and porosity about 0.11 µm and 80%, respectively. In the second part, the prepared fibers were used as membrane contactors for the study of mass transfer of arsenic(V), investigating the effect of several parameters such as pH, temperature, and initial concentration of the feed. The overall mass transfer coefficient of As(V) was around 6 × 10–6 cm/s.
Highlights
Arsenic, a highly toxic element, can be found in natural water system in its two main forms, organic and inorganic
The most employed adsorbents for arsenic removal were reported in a critical review by Mohan et al [10]
In the first part of the experimental study, hydrophobic PVDF hollow-fiber membranes have been produced by dry-wet spinning process
Summary
A highly toxic element, can be found in natural water system in its two main forms, organic and inorganic. The most employed adsorbents for arsenic removal were reported in a critical review by Mohan et al [10]. These systems present many drawbacks in terms of cost and regeneration of the activate materials. Aliquat-336 as a mobile carrier and compared its performance with that of an anion exchange membrane They reported the effective transport of As(V) by the two systems. A review on the extraction of arsenic by liquid membrane was reported by Marino and Figoli [17]. This work focuses on the extraction kinetics of As(V) by Aliquat-336 using hollow-fiber membrane contactors
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