scholarly journals An acid-stable positively charged polysulfonamide nanofiltration membrane prepared by interfacial polymerization of polyallylamine and 1,3-benzenedisulfonyl chloride for water treatment

RSC Advances ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 2042-2054 ◽  
Author(s):  
Hao Wang ◽  
Zhong Wei ◽  
Heyun Wang ◽  
Haoji Jiang ◽  
Yinchun Li ◽  
...  
Keyword(s):  
Water Treatment ◽  
Metal Ions ◽  
Interfacial Polymerization ◽  
Divalent Metal ◽  
Separation Performance ◽  
Nanofiltration Membrane ◽  
Divalent Metal Ions ◽  
Acid Stable ◽  
Positively Charged

Here, an acid stable PSA membrane with positively charge was prepared through the IP between macromolecular PAH and BDSC on PES substrate. In addition, the PSA membrane exhibited excellent separation performance to divalent metal ions.

Facilitated transport membranes by incorporating different divalent metal ions as CO2 carriers

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 65282-65290 ◽  
Author(s):  
Dongdong Peng ◽  
Ye Liu ◽  
Shaofei Wang ◽  
Zhizhang Tian ◽  
Qingping Xin ◽  
...  
Keyword(s):  
Metal Ions ◽  
Facilitated Transport ◽  
Divalent Metal ◽  
Separation Performance ◽  
Divalent Metal Ions

The comparison on CO2 separation performance of facilitated transport membranes by introducing different divalent metal ions is reported.

Synthesis of positively charged polyelectrolyte multilayer membranes for removal of divalent metal ions

2013 ◽  
Vol 28 (11) ◽  
pp. 1449-1457 ◽  
Author(s):  
Zhenping Qin ◽  
Changle Geng ◽  
Hongxia Guo ◽  
Ziang Du ◽  
Guojun Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Polyelectrolyte Multilayer ◽  
Multilayer Membranes ◽  
Image Position ◽  
Positively Charged

Abstract

The effect of divalent metal ions on the zeta potential of bubbles

2004 ◽  
Vol 50 (8) ◽  
pp. 49-56 ◽  
Author(s):  
M.Y. Han ◽  
H.J. Ahn ◽  
M.S. Shin ◽  
S.R. Kim
Keyword(s):  
Zeta Potential ◽  
Metal Ions ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Collision Efficiency ◽  
Charge Reversal ◽  
Dissolved Air Flotation ◽  
Combined Mechanism ◽  
Calcium And Magnesium Ions ◽  
Positively Charged

Micro-bubbles are used in electro-flotation (EF) and dissolved air flotation (DAF) for particle separation. The efficiency of these flotation processes depends on the collision of bubble and particle and the collision efficiency is affected by certain parameters with respect to the size and zeta potential of bubble and particle. Therefore, it is necessary to monitor not only the zeta potential of the particle, but also that of the bubble. Gas bubbles are reported to be generally negatively charged in water. In this paper, we report a study performed to measure the zeta potential of bubbles in solutions containing divalent metals and find factors which can produce positively charged bubbles. Calcium and magnesium ions were selected as divalent metal ions because natural water normally contains an appreciable quantity of them. It was found that bubbles are negatively charged in CaCl2 solutions whereas, under certain conditions, they become positively charged in MgCl2. Charge reversal of bubbles was observed above 10-2 M Mg, especially above pH 9. A probable principle that explained the charge reversal could be a combined mechanism with both specific adsorption of hydroxylated species and formation of hydroxide precipitates. Creating solution conditions that can produce positively charged bubbles in flotation methods might make it possible to remove particles using lesser amounts of coagulant or even none at all.

Interaction of divalent metal ions with the NADP+-malic enzyme from maize leaves

1991 ◽  
Vol 81 (4) ◽  
pp. 462-466 ◽  
Author(s):  
Maria Fabiana Drincovich ◽  
Alberto A. Iglesias ◽  
Carlos S. Andreo
Keyword(s):  
Metal Ions ◽  
Malic Enzyme ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Maize Leaves

scholarly journals Regulation of divalent metal ions to the aggregation and membrane damage of human islet amyloid polypeptide oligomers

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12815-12825
Author(s):  
Yajie Wang ◽  
Feihong Meng ◽  
Tong Lu ◽  
Chunyun Wang ◽  
Fei Li
Keyword(s):  
Metal Ions ◽  
Metal Binding ◽  
Membrane Damage ◽  
Islet Amyloid Polypeptide ◽  
Divalent Metal ◽  
Human Islet ◽  
Divalent Metal Ions ◽  
Islet Amyloid ◽  
Induced Membrane ◽  
Human Islet Amyloid Polypeptide

Their is a counteraction between a decrease in the disruptive ability of metal-associated oligomer species and an increase in the quantity of oligomers promoted by the metal binding in the activity of hIAPP induced membrane damage.

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