Adsorption arsenite from aqueous solutions by Cu/CuO loaded composite track-etched membranes
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Date
2020-08
Authors
Mashentseva, Anastassiya
Khassen, Tomiris
Zhumazhanova, Ainash
Zheltov, Dmitriy
Russakova, Alyona
Rakisheva, Saniya
Altynbayeva, Liliya
Aimanova, Nurgulim
Journal Title
Journal ISSN
Volume Title
Publisher
The 8th International Conference on Nanomaterials and Advanced Energy Storage Systems; Nazarbayev University; National Laboratory Astana; Institute of Batteries
Abstract
Nanoscale structures of copper and its oxides are widely used in heterogeneous catalysis and
demonstrate improved properties compared to bulk analogues [1]. Previously, we demonstrated the high
potential of composite track-etched membranes with copper microtubules (MTs) as effective catalysts for pnitrophenol
hydrogenation and the Mannich reaction [2]. In addition, efficient sorption of ions of heavy metals,
such as As, Pb, Cd, Ni, etc. is a promising application of CuO NPs [3].
The composites with the internal pore diameter of 280 nm and the copper microtubules wall thickness
of 75 nm were obtained by chemical template synthesis in nano-channels of track-etched PET membranes.
Upon the analysis of the data on the phase composition and degree of crystallinity of microtubules before and
after annealing, it was found that the complete conversion of copper to copper(II) oxide is possible only at
temperatures of 140 °C and higher, and 100% tenorite phase is formed after 10 hours of annealing at 140°C.
The composites annealed at 140 °C were also tested in terms of their arsenic (III) ions sorption capacities in
the flow mode. For the unannealed sample, the effect of flow-rate on sorption activity was studied and the
optimal value of 10 mL/min was established. It was shown that the sorption capacity of composite membranes
increases by 48.7% compared to the initial sample at 10 h of annealing and then decreases by 24% with an
increase in the annealing time (24 h). Successfully combining mechanical strength, the possibility of repeated
use, low cost and ease of production, such Cu/CuO/PET membrane composites can be considered as promising
materials for sorption of arsenic ions from aqueous solutions.
Description
Keywords
Research Subject Categories::TECHNOLOGY, nanoscale structures, copper, microtubules, MTs