Results 151 to 160 of about 23,930 (198)

Optimized coagulation pathway of Al13: Effect of in-situ Aggregation of Al13

Chemosphere, 2019
The coagulation mechanism for removing particles by Al13 has been extensively investigated for water treatments. It was widely accepted that Al13 played important roles in coagulation mainly by charge neutralization and electrostatic patch. However, the discovery of Al13 aggregates (Al13agg) in flocs indicated that the real coagulation process should ...
Pin Wang, Ruyuan Jiao, Libing Liu, Feng Xiao, Guangyu An, Dongsheng Wang   +5 more
openaire   +2 more sources

Transformation of planar Mögel Al13 to epsilon Keggin Al13 in dissolution process

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2012
Abstract Epsilon Keggin Al 13 (K-Al 13 , AlO 4 Al 12 (OH) 24 (H 2 O) 12 7+ ) is often a dominating hydrolysis aluminum species in polyaluminum chloride coagulants. Another Al 13 with planar structure (M-Al 13 , Al 13 (OH) 24 (H 2 O) 24 +15 ) has also been found to be effective coagulant, with higher charge destabilization ability.
Zhe Bi, Chenghong Feng, Dongsheng Wang, Xiaopeng Ge, Hongxiao Tang   +4 more
openaire   +1 more source

Coagulation of silica microspheres with hydrolyzed Al(III)—Significance of Al13 and Al13 aggregates

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2008
Abstract Coagulation of silica microspheres by Al coagulants with high basicities was investigated at the constant pH 6.5. Aluminum coagulants were consisted of Al13 and [Al13]n aggregates, with OH/Al ratios of 2.46, 2.6 and 2.8, respectively. The species distribution and transformation of the coagulants upon aging were studied by using ferron assay ...
Xiaohong Wu, Dongsheng Wang, Xiaopeng Ge, Hongxiao Tang   +3 more
openaire   +1 more source

Does the Al13− core exist in the Al13 polyhalide Al13In−(n=1–12) clusters?

The Journal of Chemical Physics, 2005
We have studied the structures and stabilities of Al13In−(n=1–12) clusters at the density-functional level of theory. Unlike the case of Al13I−, the Al13In−(n=2–12) clusters do not have an Al13− core electronically. Population analysis shows that a significant charge transfer occurs from the Al cluster to the I atoms, where the populations for Al13 ...
Young-Kyu, Han, Jaehoon, Jung
openaire   +2 more sources

Intercalation of both CTMAB and Al13 into montmorillonite

Journal of Colloid and Interface Science, 2009
Clays intercalated with both organic cations and hydroxy-metal cations, also known as inorganic-organic clays (IOCs), have drawn great interests in the recent years because they possess the properties of both organoclays and pillared layered clays (PILCs).
Runliang, Zhu, Tong, Wang, Fei, Ge, Wangxiang, Chen, Zhimin, You   +4 more
openaire   +2 more sources

Purification and characterization of Al13 species in coagulant polyaluminum chloride

Journal of Environmental Sciences, 2009
Nano-Al13 was separated and purified by four methods to investigate its characteristic, and was analyzed by Al-Ferron timed complexation spectrophotometer, 27Al-NMR (nuclear magnetic resonance), and transmission electron microscopy (TEM). Coagulation efficiency of nano-Al13, polyaluminum chloride (PAC), and AlCl3 in synthetic water were also ...
Baoyu, Gao, Yongbao, Chu, Qinyan, Yue, Yan, Wang   +3 more
openaire   +3 more sources

Pre-aggregation of Al13 in optimizing coagulation for removal of humic acid

Chemosphere, 2021
The effective removal of humic acid (HA) by coagulation has been extensively investigated for water treatments. However, the limitations of pH variation and excessive residual aluminum issues were still factors needed to be considered. In this study, to investigate the coagulation mechanism for removing HA by Al13 and optimize Al13 operation for ...
Ye Yue, Guangyu An, Libing Liu, Leiming Lin, Ruyuan Jiao, Dongsheng Wang   +5 more
openaire   +2 more sources

On the chemistry of the Keggin Al13 polymer

Journal of Colloid and Interface Science, 1992
Abstract The acid-base properties of the polynuclear Al13 complex have been studied by alkalimetric titration using three different experimental methods. While the positive charge of 7+ of the Al13 polymer is preserved at pH values below 6, it is lost almost completely between pH 6 and 7, i.e., within 1 pH unit.
Gerhard Furrer, Christian Ludwig, Paul W Schindler   +2 more
openaire   +1 more source

Chemisorption of O and H on an Al13 cluster

The Journal of Chemical Physics, 1986
Chemisorption of oxygen and hydrogen atoms onto a 13 atom aluminum cluster is investigated theoretically. Oxygen atoms are found to remain on the outside of the cluster, and at low coverage, to expand the Al–Al bond length by 0.42 bohr. Hydrogen atoms penetrate into the cluster resulting in a sizeable, 0.57 bohr expansion at high coverage.
Harry Partridge, Charles W. Bauschlicher
openaire   +1 more source

Sorption of naphthalene and phosphate to the CTMAB–Al13 intercalated bentonites

Journal of Hazardous Materials, 2009
This work aimed to develop novel bentonite based sorbents that could simultaneously remove hydrophobic organic compounds (HOCs) and phosphate from water. Cetyltrimethyl ammonium bromide (CTMAB) and hydroxy-aluminum (Al(13)) were used to intercalate bentonite simultaneously or sequentially to prepare series of inorganic-organic bentonites (IOBs ...
Runliang, Zhu, Lizhong, Zhu, Jianxi, Zhu, Fei, Ge, Tong, Wang   +4 more
openaire   +2 more sources