TY - JOUR
T1 - Hydrolyzed Al(III) clusters
T2 - Speciation stability of nano-Al13
AU - Wang, Dongsheng
AU - Wang, Shuifeng
AU - Huang, Ch-Hpin
AU - Chow, Christopher W.K.
PY - 2011/5/1
Y1 - 2011/5/1
N2 - Pure nano-Al13 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant. The property and stability of various species formed were characterized using Infrared, 27Al-NMR, photo correlation spectroscopy (PCS), and Ferron assay. Results showed that concentration and temperature exhibited different roles on the stability of Al13. The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCS. Al13 solutions at high concentrations (0.5-2.11 mol/L) were observed to undergo further aggregation with aging. The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the 27Al-NMR spectrum, whereas a part of Al13 would still remain as Alb. At low concentrations, Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90°C.
AB - Pure nano-Al13 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant. The property and stability of various species formed were characterized using Infrared, 27Al-NMR, photo correlation spectroscopy (PCS), and Ferron assay. Results showed that concentration and temperature exhibited different roles on the stability of Al13. The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCS. Al13 solutions at high concentrations (0.5-2.11 mol/L) were observed to undergo further aggregation with aging. The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the 27Al-NMR spectrum, whereas a part of Al13 would still remain as Alb. At low concentrations, Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90°C.
KW - Clusters
KW - Inorganic polymer flocculant
KW - Nano-Al
KW - Speciation stability
UR - http://www.scopus.com/inward/record.url?scp=79958816938&partnerID=8YFLogxK
U2 - 10.1016/S1001-0742(10)60464-0
DO - 10.1016/S1001-0742(10)60464-0
M3 - Article
C2 - 21790039
AN - SCOPUS:79958816938
SN - 1001-0742
VL - 23
SP - 705
EP - 710
JO - Journal of Environmental Sciences
JF - Journal of Environmental Sciences
IS - 5
ER -