scholarly journals Ion Selectivity of Water Molecules in Subnanoporous Liquid‐Crystalline Water‐Treatment Membranes: A Structural Study of Hydrogen Bonding

2020 ◽  
Vol 132 (52) ◽  
pp. 23667-23671
Author(s):  
Ryusuke Watanabe ◽  
Takeshi Sakamoto ◽  
Kosuke Yamazoe ◽  
Jun Miyawaki ◽  
Takashi Kato ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Water Treatment ◽  
Structural Study ◽  
Liquid Crystalline ◽  
Ion Selectivity ◽  
Water Molecules ◽  
Crystalline Water

scholarly journals Ion Selectivity of Water Molecules in Subnanoporous Liquid‐Crystalline Water‐Treatment Membranes: A Structural Study of Hydrogen Bonding

2020 ◽  
Vol 59 (52) ◽  
pp. 23461-23465 ◽  
Author(s):  
Ryusuke Watanabe ◽  
Takeshi Sakamoto ◽  
Kosuke Yamazoe ◽  
Jun Miyawaki ◽  
Takashi Kato ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Water Treatment ◽  
Structural Study ◽  
Liquid Crystalline ◽  
Ion Selectivity ◽  
Water Molecules ◽  
Crystalline Water

scholarly journals Transport mechanisms of water molecules and ions in sub-nano channels of nanostructured water treatment liquid-crystalline membranes: a molecular dynamics simulation study

2020 ◽  
Vol 6 (3) ◽  
pp. 604-611 ◽  
Author(s):  
Hiroki Nada ◽  
Takeshi Sakamoto ◽  
Masahiro Henmi ◽  
Takafumi Ogawa ◽  
Masahiro Kimura ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Water Treatment ◽  
Molecular Dynamics Simulation ◽  
Simulation Study ◽  
Liquid Crystalline ◽  
Dynamics Simulation ◽  
Self Organization ◽  
Water Molecules ◽  
Transport Mechanisms ◽  
Dynamics Simulations

Transport mechanisms of water molecules and ions in the liquid crystalline (LC) membranes with sub-nano channels formed by self-organization of thermotropic ionic LC compounds were elucidated by molecular dynamics simulations.

PEMANFAATAN GLISERIN DARI RESIDU GLISERIN SEBAGAI PLASTICIZER UNTUK PEMBUATAN BIOPLASTIK DENGAN BAHAN BAKU PATI BONGGOL PISANG KEPOK

2017 ◽  
Vol 5 (4) ◽  
pp. 26-32 ◽  
Author(s):  
Azaria Robiana ◽  
M. Yashin Nahar ◽  
Hamidah Harahap
Keyword(s):  
Tensile Strength ◽  
Hydrogen Bonding ◽  
Fatty Acid ◽  
Maximum Yield ◽  
Sem Analysis ◽  
Water Molecules ◽  
Banana Weevil ◽  
Gelatinization Temperature ◽  
Recharge Area ◽  
Maximum Quantity

Glycerin residue is waste oleochemical industry that still contain glycerin. To produce quality and maximum quantity of glycerin, then research the effect of pH acidification using phosphoric acid. Glycerin analysis includes the analysis of pH, Fatty Acid and Ester (FAE), and analysis of the levels of glycerin. The maximum yield obtained at pH acidification 2 is grading 91,60% glycerin and Fatty Acid and Ester (FAE) 3,63 meq/100 g. Glycerin obtained is used as a plasticizer in the manufacture of bioplastics. Manufacture of bioplastics using the method of pouring a solution with varying concentrations of starch banana weevil (5% w/v and 7% w/v), variations of the addition of glycerin (1 ml, 3 ml, 5 ml and 7 ml), and a variety of gelatinization temperature (60°C, 70°C, and 80°C). Analysis of bioplastics include FTIR testing, tensile strength that is supported by SEM analysis. The results obtained in the analysis of FTIR does not form a new cluster on bioplastics starch banana weevil, but only a shift in the recharge area only, it is due to the addition of O-H groups originating from water molecules that enter the polysaccharide through a mechanism gelatinitation that generates interaction hydrogen bonding strengthened. The maximum tensile strength of bioplastics produced at a concentration of starch 7% w/v, 1 ml glycerine and gelatinization temperature of 80°C is 3,430 MPa. While the tensile strength bioplastic decreased with increasing glycerin which can be shown from the results of SEM where there is a crack, indentations and lumps of starch insoluble.

Study on the effect of protein buffer solution on hydrogen bonding of water molecules based on terahertz metamaterial absorber

Optik ◽  
2021 ◽  
Vol 238 ◽  
pp. 166771
Author(s):  
Jianjun Liu ◽  
Tiejun Li ◽  
Senquan Yan ◽  
Haoxiang Wen ◽  
Fan Ding
Keyword(s):  
Hydrogen Bonding ◽  
Metamaterial Absorber ◽  
Water Molecules ◽  
Buffer Solution

scholarly journals Long-lasting, monovalent-selective capacitive deionization electrodes

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Eric N. Guyes ◽  
Amit N. Shocron ◽  
Yinke Chen ◽  
Charles E. Diesendruck ◽  
Matthew E. Suss
Keyword(s):  
Water Treatment ◽  
Ionic Conductivity ◽  
Ion Selectivity ◽  
Single Step ◽  
Carbon Electrodes ◽  
Capacitive Deionization ◽  
Treatment Technologies ◽  
Porous Carbon Electrodes ◽  
Monovalent Ion ◽  
Direct Use

AbstractEmerging water purification applications often require tunable and ion-selective technologies. For example, when treating water for direct use in irrigation, often monovalent Na+ must be removed preferentially over divalent minerals, such as Ca2+, to reduce both ionic conductivity and sodium adsorption ratio (SAR). Conventional membrane-based water treatment technologies are either largely non-selective or not dynamically tunable. Capacitive deionization (CDI) is an emerging membraneless technology that employs inexpensive and widely available activated carbon electrodes as the active element. We here show that a CDI cell leveraging sulfonated cathodes can deliver long-lasting, tunable monovalent ion selectivity. For feedwaters containing Na+ and Ca2+, our cell achieves a Na+/Ca2+ separation factor of up to 1.6. To demonstrate the cell longevity, we show that monovalent selectivity is retained over 1000 charge–discharge cycles, the highest cycle life achieved for a membraneless CDI cell with porous carbon electrodes to our knowledge, while requiring an energy consumption of ~0.38 kWh/m3 of treated water. Furthermore, we show substantial and simultaneous reductions of ionic conductivity and SAR, such as from 1.75 to 0.69 mS/cm and 19.8 to 13.3, respectively, demonstrating the potential of such a system towards single-step water treatment of brackish and wastewaters for direct use in irrigation.

A New Organic-Inorganic Hybrid Based on L-Arginine and Polyoxoanion

2015 ◽  
Vol 1105 ◽  
pp. 335-338
Author(s):  
Qiong Wu ◽  
Jing Lu ◽  
Xiao Lin Ji ◽  
Tao Yu Zou ◽  
Zhen Fang Qiao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Sodium Cation ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Inorganic Hybrid ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Photocatalytic Activities ◽  
Metal Organic ◽  
Supramolecular Networks

Modifying polyoxometalates with organic and/or metal-organic moieties is a widely adopted method for broading the range of properties. In this work a new polyoxometalate constructed from Anderson-type polyoxoanions and L-arginine (Arg =L-arginine) molecules Na [CrMo6(OH)6O18]}(H2Arg)2·8H2O(1) has been synthesized via conventional method and characterized by routine techniques. Single-crystal X-Ray diffraction analysis shows that compound 1 is constructed by chiralL-arginine grafted Anderson-type clusters, sodium cation and water molecules which are further stabilized by hydrogen bonding interactions constitute 3D supramolecular networks. In addition, both antitumor behavior and photocatalytic activities of compound 1 were investigated.

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