TY - JOUR
T1 - Anti-bacterial and super-hydrophilic bamboo charcoal with amidoxime modified for efficient and selective uranium extraction from seawater
AU - Wang, Ying
AU - Lin, Zaiwen
AU - Zhang, Hongsen
AU - Liu, Qi
AU - Yu, Jing
AU - Liu, Jingyuan
AU - Chen, Rongrong
AU - Zhu, Jiahui
AU - Wang, Jun
N1 - Publisher Copyright:
© 2021
PY - 2021/9/15
Y1 - 2021/9/15
N2 - With the growing demand for nuclear energy, uranium extraction from seawater (UES) is becoming increasingly important due to the ocean reserves 4.5 billion tons for uranium(VI) [U(VI)]. Herein, two kinds of amidoxime modified bamboo charcoal (AOOBCS and AOOBCH) with porous structure, anti-bacterial, and super-hydrophilic properties were successfully synthetized by two etching methods (soaking and hydrothermal). The super-hydrophilic property of AOOBCH accelerated the contact between the amidoxime group and uranyl ions (UO22+), and promoted the action of anti-bacterial substances (bamboo-quinone) on bacteria to restrain the form of bacterial membrane. In addition, the amidoxime groups not only didn't destroy the super-hydrophilic surface, but also adjusted the adsorbents’ pKa by changing the amidoxime grafting rate. Under PH = 7, the adsorption capacity of AOOBCH was about 1.97 times that of AOOBCS and 2.95 times that of BC. Importantly, the AOOBCH exhibited ultra-high uptake capacity (6.37 mg g−1) and exceptional selectivity for U(VI) in 100-fold interfering ions simulated seawater system due to the chelation between [sbnd]C(NH2)[dbnd]N[sbnd]OH and UO22+ to form a more stable coordination structure (Eads = −36.56 eV). Benefiting from the superior performance and selectivity, the AOOBCH is a potential candidate for UES.
AB - With the growing demand for nuclear energy, uranium extraction from seawater (UES) is becoming increasingly important due to the ocean reserves 4.5 billion tons for uranium(VI) [U(VI)]. Herein, two kinds of amidoxime modified bamboo charcoal (AOOBCS and AOOBCH) with porous structure, anti-bacterial, and super-hydrophilic properties were successfully synthetized by two etching methods (soaking and hydrothermal). The super-hydrophilic property of AOOBCH accelerated the contact between the amidoxime group and uranyl ions (UO22+), and promoted the action of anti-bacterial substances (bamboo-quinone) on bacteria to restrain the form of bacterial membrane. In addition, the amidoxime groups not only didn't destroy the super-hydrophilic surface, but also adjusted the adsorbents’ pKa by changing the amidoxime grafting rate. Under PH = 7, the adsorption capacity of AOOBCH was about 1.97 times that of AOOBCS and 2.95 times that of BC. Importantly, the AOOBCH exhibited ultra-high uptake capacity (6.37 mg g−1) and exceptional selectivity for U(VI) in 100-fold interfering ions simulated seawater system due to the chelation between [sbnd]C(NH2)[dbnd]N[sbnd]OH and UO22+ to form a more stable coordination structure (Eads = −36.56 eV). Benefiting from the superior performance and selectivity, the AOOBCH is a potential candidate for UES.
KW - Amidoxime group
KW - Anti-bacterial
KW - Bamboo charcoal
KW - Super-hydrophilic surface
KW - Uranium extraction from seawater
UR - http://www.scopus.com/inward/record.url?scp=85105694930&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2021.03.154
DO - 10.1016/j.jcis.2021.03.154
M3 - Article
C2 - 33930749
AN - SCOPUS:85105694930
SN - 0021-9797
VL - 598
SP - 455
EP - 463
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -