The
extraction of lithium from seawater has attracted much interest
as a means to meet increasing demand for lithium with the rapid expansion
of the electric vehicle and electronics markets. Herein, a renewable
and recyclable hydrogen manganese oxide (HMO)-modified cellulose film
was developed and investigated toward the extraction of lithium from
lithium-containing aqueous solutions. The porous film was characterized,
and its extraction efficacy and selectivity toward lithium from an
aqueous solution (ppm level) and seawater (ppb level) were investigated.
The HMO/cellulose film exhibited a higher Li+ adsorption
capacity (21.6 mg g–1 HMO) than HMO/polymer (e.g.,
poly(vinyl chloride) or poly(vinylidene fluoride)) films, which have
been examined in the literature for lithium extraction, because of
its multidimensional porosity and hydrophilicity. The kinetics analysis
based on a pseudo-second-order model indicated that the Li+ extraction rate of the HMO/cellulose film was 3 times higher than
that achieved by the HMO particle alone (i.e., 0.075; cf. 0.023 g
mg–1 h–1). Furthermore, the HMO/cellulose
film displayed high selectivity for Li+ when exposed to
seawaterthe extraction of Li+ reached 99%, whereas
that of the other ions present in seawater (i.e., Sr2+,
K+, and Ca2+) was <4%. In addition, the adsorption
capacity and mechanical strength of the HMO/cellulose film remained
stable even after eight adsorption–desorption cycles. The present
findings demonstrate the potential of the present HMO/cellulose film
for the recovery of Li+ from seawater or wastewater.
To achieve rapid and highly efficient recovery of Li+ from seawater, a series of H2TiO3/cellulose aerogels (HTO/CA) with a porous network were prepared by a simple and effective method. The as-prepared HTO/CA were characterized and their Li+ adsorption performance was evaluated. The obtained results revealed that the maximum capacity of HTO/CA to adsorb Li+ was 28.58 ± 0.71 mg g−1. The dynamic k2 value indicated that the Li+ adsorption rate of HTO/CA was nearly five times that of HTO powder. Furthermore, the aerogel retained extremely high Li+ selectivity compared with Mg2+, Ca2+, K+, and Na+. After regeneration for five cycles, the HTO/CA retained a Li+ adsorption capacity of 22.95 mg g−1. Moreover, the HTO/CA showed an excellent adsorption efficiency of 69.93% ± 0.04% and high selectivity to Li+ in actual seawater. These findings confirm its potential as an adsorbent for recovering Li+ from seawater.
Zr-based bulk metallic glass possesses the highest potential as a structural material among metallic glasses. However, its potential application has been restricted by a number of issues, such as fragility, small size and difficult fabrication into different shapes. In this paper, an attempt is made to evaluate the possibility of preparing a solid Zr 52.8 Cu 29.1 Ni 7.3 Al 9.8 Y 1 bulk metallic glass by using binary precursors. It is found that the GFA and the stability of Zr 52.8 Cu 29.1 Ni 7.3 Al 9.8 Y 1 bulk metallic glasses prepared in the hereditary process increase with the increasing quenching temperature, while the supercooled liquid region ΔT x increase from 55 K to 83 K. The flexural strength increases to 1823 MPa at a quenching temperature of 1723 K.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.