101
|
Wang ZY, Wu J. Ion association at discretely-charged dielectric interfaces: Giant charge inversion. J Chem Phys 2017; 147:024703. [DOI: 10.1063/1.4986792] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
102
|
Ringe S, Oberhofer H, Reuter K. Transferable ionic parameters for first-principles Poisson-Boltzmann solvation calculations: Neutral solutes in aqueous monovalent salt solutions. J Chem Phys 2017; 146:134103. [DOI: 10.1063/1.4978850] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Affiliation(s)
- Stefan Ringe
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
| | - Harald Oberhofer
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
| | - Karsten Reuter
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
| |
Collapse
|
103
|
Mikeš J, Ďurišová J, Jelínek L. Enrichment of lithium isotope 6Li by ion exchange resin with specific particle size. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5198-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
104
|
A refined draw solute flux model in forward osmosis: Theoretical considerations and experimental validation. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.08.053] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
105
|
Meynaq MYK, Shimizu K, Aghbolagh MS, Tesfalidet S, Lindholm-Sethson B. Investigation of metal ion interaction with a lipid cubic phase using electrochemical impedance spectroscopy. J Colloid Interface Sci 2016; 482:212-220. [DOI: 10.1016/j.jcis.2016.07.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 07/20/2016] [Indexed: 10/21/2022]
|
106
|
Giesecke M, Hallberg F, Fang Y, Stilbs P, Furó I. Binding of Monovalent and Multivalent Metal Cations to Polyethylene Oxide in Methanol Probed by Electrophoretic and Diffusion NMR. J Phys Chem B 2016; 120:10358-10366. [PMID: 27622602 DOI: 10.1021/acs.jpcb.6b08923] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Complex formation in methanol between monodisperse polyethylene oxide (PEO) and a large set of cations was studied by measuring the effective charge acquired by PEO upon complexation. Quantitative data were obtained at a low ionic strength of 2 mM (for some salts, also between 0.5 and 6 mM) by a combination of diffusion nuclear magnetic resonance (NMR) and electrophoretic NMR experiments. For strongly complexing cations, the magnitude of the acquired effective charge was on the order of 1 cation per 100 monomer units. For monovalent cations, the relative strength of binding varies as Na+ < K+ ≈ Rb+ ≈ Cs+, whereas Li+ exhibited no significant binding. All polyvalent cations bind very weakly, except for Ba2+ that exhibited strong binding. Anions do not bind, as is shown by the lack of response to the chemical nature of anionic species (perchlorate, iodide, or acetate). Diffusion experiments directly show that the acetate anion with monovalent cations does not associate with PEO. Considering all cations, we find that the observed binding does not follow any Hofmeister order. Instead, binding occurs below a critical surface charge density, which indicates that the degree of complexation is defined by the solvation shell. A large solvation shell prevents the binding of most multivalent ions.
Collapse
Affiliation(s)
- Marianne Giesecke
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| | - Fredrik Hallberg
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| | - Yuan Fang
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| | - Peter Stilbs
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| | - István Furó
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| |
Collapse
|
107
|
Abidi A, Gherraf N, Ladjel S, Rabiller-Baudry M, Bouchami T. Effect of operating parameters on the selectivity of nanofiltration phosphates transfer through a Nanomax-50 membrane. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2011.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
108
|
Fujita M, Kazerouni AM, Bacsa J. The structure of a valinomycin–hexaaquamagnesium trifluoromethanesulfonate compound. Acta Crystallogr C 2016; 72:627-33. [DOI: 10.1107/s2053229616010676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 07/01/2016] [Indexed: 11/10/2022] Open
Abstract
Valinomycin is a naturally occurring cyclic dodecadepsipeptide with the formulacyclo-[D-HiVA→L-Val →L-LA→L-Val]3(D-HiVA is D-α-hydroxyisovaleic acid, Val is valine and LA is lactic acid), which binds a K+ion with high selectively. In the past, several cation-binding modes have been revealed by X-ray crystallography. In the K+, Rb+and Cs+complexes, the ester O atoms coordinate the cation with a trigonal antiprismatic geometry, while the six amide groups form intramolecular hydrogen bonds and the network that is formed has a bracelet-like conformation (Type 1 binding). Type 2 binding is seen with the Na+cation, in which the valinomycin molecule retains the bracelet conformation but the cations are coordinated by only three ester carbonyl groups and are not centrally located. In addition, a picrate counter-ion and a water molecule is found at the center of the valinomycin bracelet. Type 3 binding is observed with divalent Ba2+, in which two cations are incorporated, bridged by two anions, and coordinated by amide carbonyl groups, and there are no intramolecular amide hydrogen bonds. In this paper, we present a new Type 4 cation-binding mode, observed in valinomycin hexaaquamagnesium bis(trifluoromethanesulfonate) trihydrate, C54H90N6O18·[Mg(H2O)6](CF3SO3)2·3H2O, in which the valinomycin molecule incorporates a whole hexaaquamagnesium ion, [Mg(H2O)6]2+,viahydrogen bonding between the amide carbonyl groups and the hydrate water H atoms. In this complex, valinomycin retains the threefold symmetry observed in Type 1 binding, but the amide hydrogen-bond network is lost; the hexaaquamagnesium cation is hydrogen bonded by six amide carbonyl groups.1H NMR titration data is consistent with the 1:1 binding stoichiometry in acetonitrile solution. This new cation-binding mode of binding a whole hexaaquamagnesium ion by a cyclic polypeptide is likely to have important implications for the study of metal binding with biological models under physiological conditions.
Collapse
|
109
|
|
110
|
Nguyen NC, Nguyen HT, Ho ST, Chen SS, Ngo HH, Guo W, Ray SS, Hsu HT. Exploring high charge of phosphate as new draw solute in a forward osmosis-membrane distillation hybrid system for concentrating high-nutrient sludge. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 557-558:44-50. [PMID: 26994792 DOI: 10.1016/j.scitotenv.2016.03.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 03/04/2016] [Accepted: 03/04/2016] [Indexed: 06/05/2023]
Abstract
For the first time, a high charge of phosphate was used as the draw solute in a forward osmosis-membrane distillation (FO-MD) hybrid system for concentrating high-nutrient sludge. A high water flux (12.5L/m(2)h) and a low reverse salt flux (0.84g/m(2)) were simultaneously achieved at pH9 by using 0.1M Na3PO4 as the draw solute and deionized water as the feed solution in the FO process. The specific reverse salt flux of 0.1M Na3PO4 (Js/Jw=0.07g/L) was considerably less than that of 0.1M NaCl (Js/Jw=0.37g/L) because the complexion between Na(+) and HPO4(2-) at pH9 led to the reduction of free Na(+) ions, which subsequently reduced the reverse salt diffusion substantially. Moreover, for a feed solution with an initial sludge concentration of 3500mg/L, the sludge concentration could be concentrated to 19,800 and 22,000mg/L in the pressure-retarded osmosis (PRO) and FO membrane orientations, respectively, after 15h of operation. Four types of MD membranes were selected for draw solution recovery; of these, a polytetrafluoroethylene membrane with a pore size of 0.45μm was the most effective in achieving a high water flux (10.28L/m(2)h) and high salt rejection (approximately 100%) in a diluted Na3PO4 draw solution.
Collapse
Affiliation(s)
- Nguyen Cong Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC; Faculty of Environment and Natural Resources, DaLat University, Viet Nam
| | - Hau Thi Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC; Faculty of Environment and Natural Resources, DaLat University, Viet Nam
| | - Su-Thing Ho
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC
| | - Shiao-Shing Chen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC.
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, NSW 2007, Australia.
| | - Wenshan Guo
- School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Saikat Sinha Ray
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC
| | - Hung-Te Hsu
- Department of Environmental Engineering, Chung Yuan Christian University, Chung Li 32023, Taiwan, ROC
| |
Collapse
|
111
|
Zambrano HA, Vásquez N, Wagemann E. Wall embedded electrodes to modify electroosmotic flow in silica nanoslits. Phys Chem Chem Phys 2016; 18:1202-11. [PMID: 26658698 DOI: 10.1039/c5cp05785j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Electroosmotic flow in a silica slit channel with nonuniform surface charge density is investigated. In nanoconfinement, the electrical double layer occupies a non-negligible fraction of the system. Therefore, modifying the charge density on specific locations on the channel wall surface allows effective manipulation of the electroosmotic flow rates. In the present study, extensive (160 ns) nonequilibrium molecular dynamics simulations are conducted to investigate the ability of controlling the electroosmotic flow control in a nanoslit by patterning the surface potential. The mechanism to modify the surface charge consists of a set of charged electrodes embedded within one of the channel walls. The presence of the embedded electrodes results in the redistribution of ions in the electrolyte solution and in the alteration of the electroosmotic flow throughout the nanochannel. Indeed, the results reveal significant changes in the electroosmotic driving force and velocity profiles including local flow reversal. This study provides physical insight into the direct manipulation of the electrokinetic flow in nanoslits.
Collapse
Affiliation(s)
- Harvey A Zambrano
- Department of Chemical Engineering, Universidad de Concepcion, Concepcion, Chile.
| | - Nicolás Vásquez
- Department of Chemical Engineering, Universidad de Concepcion, Concepcion, Chile.
| | - Enrique Wagemann
- Department of Chemical Engineering, Universidad de Concepcion, Concepcion, Chile.
| |
Collapse
|
112
|
Nguyen NC, Nguyen HT, Chen SS, Ngo HH, Guo W, Chan WH, Ray SS, Li CW, Hsu HT. A novel osmosis membrane bioreactor-membrane distillation hybrid system for wastewater treatment and reuse. BIORESOURCE TECHNOLOGY 2016; 209:8-15. [PMID: 26946435 DOI: 10.1016/j.biortech.2016.02.102] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 02/21/2016] [Accepted: 02/22/2016] [Indexed: 06/05/2023]
Abstract
A novel approach was designed to simultaneously enhance nutrient removal and reduce membrane fouling for wastewater treatment using an attached growth biofilm (AGB) integrated with an osmosis membrane bioreactor (OsMBR) system for the first time. In this study, a highly charged organic compound (HEDTA(3-)) was employed as a novel draw solution in the AGB-OsMBR system to obtain a low reverse salt flux, maintain a healthy environment for the microorganisms. The AGB-OsMBR system achieved a stable water flux of 3.62L/m(2)h, high nutrient removal of 99% and less fouling during a 60-day operation. Furthermore, the high salinity of diluted draw solution could be effectively recovered by membrane distillation (MD) process with salt rejection of 99.7%. The diluted draw solution was re-concentrated to its initial status (56.1mS/cm) at recovery of 9.8% after 6h. The work demonstrated that novel multi-barrier systems could produce high quality potable water from impaired streams.
Collapse
Affiliation(s)
- Nguyen Cong Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC; Faculty of Environment and Natural Resources, Da Lat University, Viet Nam
| | - Hau Thi Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC; Faculty of Environment and Natural Resources, Da Lat University, Viet Nam
| | - Shiao-Shing Chen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC.
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Wenshan Guo
- School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Wen Hao Chan
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC
| | - Saikat Sinha Ray
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan, ROC
| | - Chi-Wang Li
- Department of Water Resources and Environmental Engineering, TamKang University, 151 Yingzhuan Road, Tamsui District, New Taipei City 25137, Taiwan, ROC
| | - Hung-Te Hsu
- Department of Environmental Engineering, Chung Yuan Christian University, Chung Li 32023, Taiwan, ROC
| |
Collapse
|
113
|
|
114
|
Zhang Y, Xu J, Yang G. Multi-ion migration of Ca 2+, Mg 2+, Na +and K +in the CREDI process. SEP SCI TECHNOL 2016. [DOI: 10.1080/01496395.2016.1147466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
115
|
Mahendran V, Philip J. Macromolecular conformation changes at oil-water interface in the presence of cations. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.02.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
116
|
Nguyen NC, Chen SS, Nguyen HT, Ray SS, Ngo HH, Guo W, Lin PH. Innovative sponge-based moving bed-osmotic membrane bioreactor hybrid system using a new class of draw solution for municipal wastewater treatment. WATER RESEARCH 2016; 91:305-313. [PMID: 26803266 DOI: 10.1016/j.watres.2016.01.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 01/08/2016] [Accepted: 01/12/2016] [Indexed: 06/05/2023]
Abstract
For the first time, an innovative concept of combining sponge-based moving bed (SMB) and an osmotic membrane bioreactor (OsMBR), known as the SMB-OsMBR hybrid system, were investigated using Triton X-114 surfactant coupled with MgCl2 salt as the draw solution. Compared to traditional activated sludge OsMBR, the SMB-OsMBR system was able to remove more nutrients due to the thick-biofilm layer on sponge carriers. Subsequently less membrane fouling was observed during the wastewater treatment process. A water flux of 11.38 L/(m(2) h) and a negligible reverse salt flux were documented when deionized water served as the feed solution and a mixture of 1.5 M MgCl2 and 1.5 mM Triton X-114 was used as the draw solution. The SMB-OsMBR hybrid system indicated that a stable water flux of 10.5 L/(m(2) h) and low salt accumulation were achieved in a 90-day operation. Moreover, the nutrient removal efficiency of the proposed system was close to 100%, confirming the effectiveness of simultaneous nitrification and denitrification in the biofilm layer on sponge carriers. The overall performance of the SMB-OsMBR hybrid system using MgCl2 coupled with Triton X-114 as the draw solution demonstrates its potential application in wastewater treatment.
Collapse
Affiliation(s)
- Nguyen Cong Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC
| | - Shiao-Shing Chen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC.
| | - Hau Thi Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC
| | - Saikat Sinha Ray
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, NSW2007, Australia.
| | - Wenshan Guo
- School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, NSW2007, Australia
| | - Po-Hsun Lin
- Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, Taiwan, ROC
| |
Collapse
|
117
|
Zhong C, Deng Y, Hu W, Qiao J, Zhang L, Zhang J. A review of electrolyte materials and compositions for electrochemical supercapacitors. Chem Soc Rev 2016; 44:7484-539. [PMID: 26050756 DOI: 10.1039/c5cs00303b] [Citation(s) in RCA: 1009] [Impact Index Per Article: 126.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Electrolytes have been identified as some of the most influential components in the performance of electrochemical supercapacitors (ESs), which include: electrical double-layer capacitors, pseudocapacitors and hybrid supercapacitors. This paper reviews recent progress in the research and development of ES electrolytes. The electrolytes are classified into several categories, including: aqueous, organic, ionic liquids, solid-state or quasi-solid-state, as well as redox-active electrolytes. Effects of electrolyte properties on ES performance are discussed in detail. The principles and methods of designing and optimizing electrolytes for ES performance and application are highlighted through a comprehensive analysis of the literature. Interaction among the electrolytes, electro-active materials and inactive components (current collectors, binders, and separators) is discussed. The challenges in producing high-performing electrolytes are analyzed. Several possible research directions to overcome these challenges are proposed for future efforts, with the main aim of improving ESs' energy density without sacrificing existing advantages (e.g., a high power density and a long cycle-life) (507 references).
Collapse
Affiliation(s)
- Cheng Zhong
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Yida Deng
- Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, China
| | - Wenbin Hu
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China. and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, China
| | - Jinli Qiao
- School of Environmental Engineering, Donghua University, Shanghai, China
| | - Lei Zhang
- Energy, Mining & Environment, National Research Council of Canada, Vancouver, BC, Canada
| | - Jiujun Zhang
- Energy, Mining & Environment, National Research Council of Canada, Vancouver, BC, Canada
| |
Collapse
|
118
|
Abstract
Despite the ubiquitous character and relevance of the electric double layer in the entire realm of interface and colloid science, very little is known of the effect that surface heterogeneity exerts on the underlying mechanisms of ion adsorption. Herein, computer simulations offer a perspective that, in sharp contrast to the homogeneously charged surface, discrete groups promote multivalent counterion binding, leading to charge reversal but possibly having not a sign change of the electrophoretic mobility. Counterintuitively, the introduction of dielectric images yields a significantly greater accumulation of counterions, which further facilitates the magnitude of charge reversal. The reported results are very sensitive to both the degree of ion hydration and the representation of surface charges. Our findings shed light on the mechanism for charge reversal over a broad range of coupling regimes operating the adsorption of counterions through surface group bridging attraction with their own images and provide opportunities for experimental studies and theoretical development.
Collapse
Affiliation(s)
- Zhi-Yong Wang
- School of Optoelectronic Information, Chongqing University of Technology, Chongqing 400054, People's Republic of China
| |
Collapse
|
119
|
Wang Y, Zhang B, Zhai G. The effect of incubation conditions on the hemolytic properties of unmodified graphene oxide with various concentrations. RSC Adv 2016. [DOI: 10.1039/c6ra13607a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The hemolytic properties of graphene oxide (GO) were evaluated from the novel view of the incubation conditions.
Collapse
Affiliation(s)
- Yang Wang
- Department of Pharmaceutics
- College of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
- China
| | - Baomei Zhang
- Department of Pharmaceutics
- College of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
- China
| | - Guangxi Zhai
- Department of Pharmaceutics
- College of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
- China
| |
Collapse
|
120
|
Zavitsas AA. Comment on “The size and structure of selected hydrated ions and implications for ion channel selectivity” by Z.-H. Yang, RSC. Adv., 2015, 5, 1213. RSC Adv 2016. [DOI: 10.1039/c6ra13733d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydration numbers of electrolytes from freezing point depressions plottedversusthe entropic contributions for the gaseous cations dissolving in water.
Collapse
|
121
|
Nguyen HT, Nguyen NC, Chen SS, Ngo HH, Guo W, Li CW. A new class of draw solutions for minimizing reverse salt flux to improve forward osmosis desalination. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 538:129-136. [PMID: 26298255 DOI: 10.1016/j.scitotenv.2015.07.156] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 07/31/2015] [Accepted: 07/31/2015] [Indexed: 06/04/2023]
Abstract
The applications of forward osmosis (FO) have been hindered because of the lack of an optimal draw solution. The reverse salt flux from the draw solution not only reduces the water flux but also increases the cost of draw solute replenishment. Therefore, in this study, Tergitol NP7 and NP9 with a long straight carbon chain and low critical micelle concentration (CMC) were coupled with highly charged ethylenediaminetetraacetic acid (EDTA) as an innovative draw solution to minimize reverse salt diffusion in FO for the first time. The results showed that the lowest reverse salt flux of 0.067 GMH was observed when 0.1M EDTA-2Na coupled with 15mM NP7 was used as a draw solution and deionized water was used as a feed solution in FO mode (active layer facing with the feed solution). This is due to the hydrophobic interaction between the tails of NP7 and the FO membrane, thus creating layers on the membrane surface and constricting the FO membrane pores. Moreover, 1M EDTA-2Na coupled with 15mM NP7 is promising as an optimal draw solution for brackish water and sea water desalination. Average water fluxes of 7.68, 6.78, and 5.95 LMH were achieved when brackish water was used as a feed solution (5, 10, and 20g/L NaCl), and an average water flux of 3.81 LMH was achieved when sea water was used as a feed solution (35g/L NaCl). The diluted draw solution was recovered using a nanofiltration (NF-TS80) membrane with a high efficiency of 95% because of the high charge and large size of the draw solution.
Collapse
Affiliation(s)
- Hau Thi Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Zhongxiao E. Rd, Taipei 106, Taiwan, ROC
| | - Nguyen Cong Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Zhongxiao E. Rd, Taipei 106, Taiwan, ROC
| | - Shiao-Shing Chen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Zhongxiao E. Rd, Taipei 106, Taiwan, ROC.
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Broadway, Sydney, NSW 2007, Australia.
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Broadway, Sydney, NSW 2007, Australia
| | - Chi-Wang Li
- Department of Water Resources and Environmental Engineering, TamKang University, 151 Yingzhuan Road, Tamsui District, New Taipei City 25137, Taiwan, ROC
| |
Collapse
|
122
|
Wang ZY, Ma Z, Ma YQ. Suppression and promotion of charge inversion in the presence of multivalent coions. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 92:060303. [PMID: 26764614 DOI: 10.1103/physreve.92.060303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Indexed: 06/05/2023]
Abstract
We report charge inversion using Monte Carlo calculations for a negatively charged surface in aqueous solutions involving coions of different charges and monovalent counterions. It is shown that a rise in the valence of coions at moderate concentrations can substantially promote charge inversion for the surface charge values of biological relevance, regardless of the representation of surface charges but dependent in a nontrivial way on polarization effects resulting from dielectric discontinuity. These obtained characteristics challenge the traditional belief that the coions are generally considered to suppress charge inversion and expose the important role of coions of higher valence in tailoring the effective interactions of biomolecules with the cell membrane.
Collapse
Affiliation(s)
- Zhi-Yong Wang
- School of Optoelectronic Information, Chongqing University of Technology, Chongqing 400054, China
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - Zengwei Ma
- School of Optoelectronic Information, Chongqing University of Technology, Chongqing 400054, China
| | - Yu-qiang Ma
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China
| |
Collapse
|
123
|
Li J, Guan Y, Cheng F, Liu Y. Treatment of high salinity brines by direct contact membrane distillation: Effect of membrane characteristics and salinity. CHEMOSPHERE 2015; 140:143-149. [PMID: 25563165 DOI: 10.1016/j.chemosphere.2014.12.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 12/01/2014] [Accepted: 12/03/2014] [Indexed: 06/04/2023]
Abstract
Direct contact membrane distillation (DCMD) is one of the attractive technologies for high salinity brine treatment. In this study, four polytetrafluoroethylene (PTFE) membranes were examined in treating highly concentrated salt solutions. Results showed that non-supported membranes generally have a higher overall mass transfer coefficient but porosity seems to be the most important parameter controlling membrane flux and thermal efficiency. Supported membranes with large thickness had relatively higher thermal efficiency than small thickness. This can be attributed to their reduced heat loss through heat condition. In addition, KCl, NaCl and MgCl2 solutions showed distinct trends over flux decline at high salt concentrations (⩾2.0M). The difference in flux was largely due to the discrepancy in water activities of these solutions (KCl>NaCl>MgCl2). However, the effect of viscosity on permeate flux could not be neglected for MgCl2 at high salt concentrations as the suddenly increased viscosity could lead to serious temperature polarization. This study indicates that membrane distillation is a promising technology for high salinity brine treatment.
Collapse
Affiliation(s)
- Jianfeng Li
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China
| | - Yunshan Guan
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China; School of Chemical Engineering, Qinhai University, Xining 810016, China
| | - Fangqin Cheng
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China; School of Chemical Engineering, Qinhai University, Xining 810016, China.
| | - Yu Liu
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 637723, Singapore
| |
Collapse
|
124
|
Zhang X, Wang X, Li C, Wang Y, Feng H, Xu T. A quantification of diffusion dialysis process: Single electrolyte system (hydrochloric acid solution). Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2014.08.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
125
|
Mahon E, Garai S, Müller A, Barboiu M. Biomimetic Approach for Ion Channels Based on Surfactant Encapsulated Spherical Porous Metal-Oxide Capsules. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:5165-5170. [PMID: 26248195 DOI: 10.1002/adma.201501255] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 06/28/2015] [Indexed: 06/04/2023]
Abstract
Distinguished hybrid clusters with hydrophilic and hydrophobic interiors embedded within cationic surfactant shells are spontaneously inserted into lipid bilayers, showing well-defined ionic conductance behaviors. The transport via the narrow pore gates acting as selectivity filters is controlled by the dehydration energy of the cations.
Collapse
Affiliation(s)
- Eugene Mahon
- Adaptive Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place Eugène Bataillon, CC 047, F-34095, Montpellier, France
| | - Somenath Garai
- Universität Bielefeld, Fakultät für Chemie, Postfach 100131, 33501, Bielefeld, Germany
| | - Achim Müller
- Universität Bielefeld, Fakultät für Chemie, Postfach 100131, 33501, Bielefeld, Germany
| | - Mihail Barboiu
- Adaptive Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place Eugène Bataillon, CC 047, F-34095, Montpellier, France
| |
Collapse
|
126
|
Wang X, Zhang X, Wang Y, Du Y, Feng H, Xu T. Simultaneous recovery of ammonium and phosphorus via the integration of electrodialysis with struvite reactor. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.04.034] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
127
|
Nguyen NC, Chen SS, Nguyen HT, Ngo HH, Guo W, Hao CW, Lin PH. Applicability of a novel osmotic membrane bioreactor using a specific draw solution in wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 518-519:586-594. [PMID: 25790914 DOI: 10.1016/j.scitotenv.2015.03.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 03/03/2015] [Accepted: 03/03/2015] [Indexed: 06/04/2023]
Abstract
This study aims to develop a new osmotic membrane bioreactor by combining a moving bed biofilm reactor (MBBR) with forward osmosis membrane bioreactor (FOMBR) to treat wastewater. Ethylenediaminetetraacetic acid disodium salt coupled with polyethylene glycol tert-octylphenyl ether was used as an innovative draw solution in this membrane hybrid system (MBBR-OsMBR) for minimizing the reverse salt flux and maintaining a healthy environment for the microorganism community. The results showed that the hybrid system achieved a stable water flux of 6.94 L/m(2) h and low salt accumulation in the bioreactor for 68 days of operation. At a filling rate of 40% (by volume of the bioreactor) of the polyethylene balls used as carriers, NH4(+)-N and PO4(3-)-P were almost removed (>99%) while producing relatively low NO3(-)-N and NO2(-)-N in the effluent (e.g. <0.56 and 0.96 mg/L, respectively). Furthermore, from analysis based on scanning electron microscopy, Fourier transform infrared spectroscopy, and fluorescence emission-excitation matrix spectrophotometry, there was a thin gel-like fouling layer on the FO membrane, which composed of bacteria as well as biopolymers and protein-like substances. Nonetheless, the formation of these fouling layers of the FO membrane in MBBR-OsMBR was reversible and removed by a physical cleaning technique.
Collapse
Affiliation(s)
- Nguyen Cong Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 106, Taiwan, ROC
| | - Shiao-Shing Chen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 106, Taiwan, ROC.
| | - Hau Thi Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 106, Taiwan, ROC
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, NSW 2007, Australia.
| | - Wenshan Guo
- School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Chan Wen Hao
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 106, Taiwan, ROC
| | - Po-Hsun Lin
- New Materials Research and Development Dept., China Steel Corporation, Taiwan, ROC
| |
Collapse
|
128
|
Waluyo I, Nordlund D, Bergmann U, Schlesinger D, Pettersson LGM, Nilsson A. A different view of structure-making and structure-breaking in alkali halide aqueous solutions through x-ray absorption spectroscopy. J Chem Phys 2015; 140:244506. [PMID: 24985653 DOI: 10.1063/1.4881600] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
X-ray absorption spectroscopy measured in transmission mode was used to study the effect of alkali and halide ions on the hydrogen-bonding (H-bonding) network of water. Cl(-) and Br(-) are shown to have insignificant effect on the structure of water while I(-) locally weakens the H-bonding, as indicated by a sharp increase of the main-edge feature in the x-ray absorption spectra. All alkali cations act as structure-breakers in water, weakening the H-bonding network. The spectral changes are similar to spectra of high density ices where the 2nd shell has collapsed due to a break-down of the tetrahedral structures, although here, around the ions, the breakdown of the local tetrahedrality is rather due to non-directional H-bonding to the larger anions. In addition, results from temperature-dependent x-ray Raman scattering measurements of NaCl solution confirm the H-bond breaking effect of Na(+) and the effect on the liquid as similar to an increase in temperature.
Collapse
Affiliation(s)
- Iradwikanari Waluyo
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| | - Uwe Bergmann
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| | - Daniel Schlesinger
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars G M Pettersson
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Anders Nilsson
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| |
Collapse
|
129
|
|
130
|
de Grooth J, Oborný R, Potreck J, Nijmeijer K, de Vos WM. The role of ionic strength and odd–even effects on the properties of polyelectrolyte multilayer nanofiltration membranes. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.10.044] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
131
|
Phosphate pre-concentration from municipal wastewater by selectrodialysis: Effect of competing components. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2014.11.017] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
132
|
Tran AT, Mondal P, Lin J, Meesschaert B, Pinoy L, Van der Bruggen B. Simultaneous regeneration of inorganic acid and base from a metal washing step wastewater by bipolar membrane electrodialysis after pretreatment by crystallization in a fluidized pellet reactor. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.09.006] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
133
|
Zhu L, Yu H, Zhang H, Shen J, Xue L, Gao C, van der Bruggen B. Mixed matrix membranes containing MIL-53(Al) for potential application in organic solvent nanofiltration. RSC Adv 2015. [DOI: 10.1039/c5ra10259f] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
PMIA MMMs with various amounts of MIL-53(Al) were developed through non-solvent induced phase separation and the MMMs permeance was increased dramatically while keeping high rejections in organic solvent nanofiltration.
Collapse
Affiliation(s)
- Lifang Zhu
- Department of Municipal Engineering
- Zhejiang University of Water Resources and Electric Power
- Hangzhou 310018
- China
| | - Hongwei Yu
- Center of Membrane Science and Water Technology
- Marine College
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Huijuan Zhang
- Center of Membrane Science and Water Technology
- Marine College
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Jiangnan Shen
- Center of Membrane Science and Water Technology
- Marine College
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Lixin Xue
- Ningbo Institute of Material Technology & Engineering
- Chinese Academy of Sciences
- Ningbo
- P.R. China
| | - Congjie Gao
- Center of Membrane Science and Water Technology
- Marine College
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Bart van der Bruggen
- Department of Chemical Engineering
- Process Engineering for Sustainable Systems (ProcESS)
- KU Leuven
- B-3001 Leuven
- Belgium
| |
Collapse
|
134
|
Nguyen NC, Nguyen HT, Chen SS, Nguyen NT, Li CW. Application of forward osmosis (FO) under ultrasonication on sludge thickening of waste activated sludge. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 72:1301-1307. [PMID: 26465299 DOI: 10.2166/wst.2015.341] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Forward osmosis (FO) is an emerging process for dewatering solid-liquid stream which has the potential to be innovative and sustainable. However, the applications have still been hindered by low water flux and membrane fouling when activated sludge is used as the feed solution due to bound water from microbial cells. Hence, a novel strategy was designed to increase sludge thickening and reduce membrane fouling in the FO process under ultrasonic condition. The results from the ultrasound/FO hybrid system showed that the sludge concentration reached up to 20,400 and 28,400 mg/L from initial sludge concentrations of 3000 and 8000 mg/L with frequency of 40 kHz after 22 hours, while the system without ultrasound had to spend 26 hours to achieve the same sludge concentration. This identifies that the presence of ultrasound strongly affected sludge structure as well as sludge thickening of the FO process. Furthermore, the ultrasound/FO hybrid system could achieve NH4+-N removal efficiency of 96%, PO4(3-)-P of 98% and dissolved organic carbon (DOC) of 99%. The overall performance demonstrates that the proposed ultrasound/FO system using seawater as a draw solution is promising for sludge thickening application.
Collapse
Affiliation(s)
- Nguyen Cong Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC E-mail:
| | - Hau Thi Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC E-mail:
| | - Shiao-Shing Chen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC E-mail:
| | - Nhat Thien Nguyen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC E-mail:
| | - Chi-Wang Li
- Department of Water Resources and Environmental Engineering, TamKang University, 151 Yingzhuan Road, Tamsui District, New Taipei City 25137, Taiwan, ROC
| |
Collapse
|
135
|
Norouzy A, Assaf KI, Zhang S, Jacob MH, Nau WM. Coulomb Repulsion in Short Polypeptides. J Phys Chem B 2014; 119:33-43. [DOI: 10.1021/jp508263a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Amir Norouzy
- Department of Life Sciences
and Chemistry, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Khaleel I. Assaf
- Department of Life Sciences
and Chemistry, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Shuai Zhang
- Department of Life Sciences
and Chemistry, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Maik H. Jacob
- Department of Life Sciences
and Chemistry, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Werner M. Nau
- Department of Life Sciences
and Chemistry, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| |
Collapse
|
136
|
|
137
|
Neil CW, Lee B, Jun YS. Different arsenate and phosphate incorporation effects on the nucleation and growth of iron(III) (Hydr)oxides on quartz. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:11883-11891. [PMID: 25232994 DOI: 10.1021/es503251z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Iron(III) (hydr)oxides play an important role in the geochemical cycling of contaminants in natural and engineered aquatic systems. The ability of iron(III) (hydr)oxides to immobilize contaminants can be related to whether the precipitates form heterogeneously (e.g., at mineral surfaces) or homogeneously in solution. Utilizing grazing incidence small-angle X-ray scattering (GISAXS), we studied heterogeneous iron(III) (hydr)oxide nucleation and growth on quartz substrates for systems containing arsenate and phosphate anions. For the iron(III) only system, the radius of gyration (Rg) of heterogeneously formed precipitates grew from 1.5 to 2.5 (± 1.0) nm within 1 h. For the system containing 10(-5) M arsenate, Rg grew from 3.6 to 6.1 (± 0.5) nm, and for the system containing 10(-5) M phosphate, Rg grew from 2.0 to 4.0 (± 0.2) nm. While the systems containing these oxyanions had more growth, the system containing only iron(III) had the most nucleation events on substrates. Ex situ analyses of homogeneously and heterogeneously formed precipitates indicated that precipitates in the arsenate system had the highest water content and that oxyanions may bridge iron(III) hydroxide polymeric embryos to form a structure similar to ferric arsenate or ferric phosphate. These new findings are important because differences in nucleation and growth rates and particle sizes will impact the number of available reactive sites and the reactivity of newly formed particles toward aqueous contaminants.
Collapse
Affiliation(s)
- Chelsea W Neil
- Department of Energy, Environmental and Chemical Engineering, Washington University , St. Louis, Missouri 63130, United States
| | | | | |
Collapse
|
138
|
Geise GM, Cassady HJ, Paul DR, Logan BE, Hickner MA. Specific ion effects on membrane potential and the permselectivity of ion exchange membranes. Phys Chem Chem Phys 2014; 16:21673-81. [DOI: 10.1039/c4cp03076a] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
139
|
Oberleithner H. Sodium selective erythrocyte glycocalyx and salt sensitivity in man. Pflugers Arch 2014; 467:1319-25. [PMID: 25027385 PMCID: PMC4435639 DOI: 10.1007/s00424-014-1577-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 07/07/2014] [Indexed: 01/04/2023]
Abstract
Negatively charged surfaces of erythrocytes (RBC) reflect properties of the endothelial glycocalyx. Plasma electrolytes counteract these charges and thus control the repulsive forces between RBC and endothelium. Although Na+ is supposed to exert a rather high affinity to the RBC surface, a direct comparison between Na+ and K+ in counteracting the RBC surface has been never made. Therefore, we measured Na+/K+ selectivity of the RBC surface in 20 healthy volunteers applying the previously published salt blood test (SBT). It turned out that the Na+/K+ selectivity ratio of the RBC glycocalyx is on average 6.1 ± 0.39 (ranging from 3 to 9 in different individuals). Considering standard plasma Na+ and K+ concentrations, binding probability of Na+/K+ at the RBC surface is about 180:1. The SBT reveals that plasma K+ counteracts only about 7 % of the negative charges in the RBC glycocalyx. As an in vivo proof of principle, a volunteer’s blood was continuously tested over 6 months while applying a glycocalyx protective polyphenol-rich natural compound (hawthorn extract). It turned out that RBC Na+ sensitivity (the inverse of Na+ buffer capacity) decreased significantly by about 25 % while Na+/K+ selectivity of the RBC glycocalyx declined only slightly by about 8 %. Taken together, (i) plasma Na+ selectively buffers the negative charges of the RBC glycocalyx, (ii) the contribution of K+ in counteracting these negative surface charges is small, and (iii) natural polyphenols applied in vivo increase RBC surface negativity. In conclusion, low plasma Na+ is supposed to favor frictionless RBC-slipping through blood vessels.
Collapse
Affiliation(s)
- Hans Oberleithner
- Institute of Physiology II, University of Münster, Robert-Koch-Str. 27b, 48149, Münster, Germany,
| |
Collapse
|
140
|
|
141
|
Slochower DR, Wang YH, Tourdot RW, Radhakrishnan R, Janmey PA. Counterion-mediated pattern formation in membranes containing anionic lipids. Adv Colloid Interface Sci 2014; 208:177-88. [PMID: 24556233 DOI: 10.1016/j.cis.2014.01.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 01/21/2014] [Accepted: 01/22/2014] [Indexed: 01/05/2023]
Abstract
Most lipid components of cell membranes are either neutral, like cholesterol, or zwitterionic, like phosphatidylcholine and sphingomyelin. Very few lipids, such as sphingosine, are cationic at physiological pH. These generally interact only transiently with the lipid bilayer, and their synthetic analogs are often designed to destabilize the membrane for drug or DNA delivery. However, anionic lipids are common in both eukaryotic and prokaryotic cell membranes. The net charge per anionic phospholipid ranges from -1 for the most abundant anionic lipids such as phosphatidylserine, to near -7 for phosphatidylinositol 3,4,5 trisphosphate, although the effective charge depends on many environmental factors. Anionic phospholipids and other negatively charged lipids such as lipopolysaccharides are not randomly distributed in the lipid bilayer, but are highly restricted to specific leaflets of the bilayer and to regions near transmembrane proteins or other organized structures within the plane of the membrane. This review highlights some recent evidence that counterions, in the form of monovalent or divalent metal ions, polyamines, or cationic protein domains, have a large influence on the lateral distribution of anionic lipids within the membrane, and that lateral demixing of anionic lipids has effects on membrane curvature and protein function that are important for biological control.
Collapse
Affiliation(s)
- David R Slochower
- Graduate Group in Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Yu-Hsiu Wang
- Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Richard W Tourdot
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ravi Radhakrishnan
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Paul A Janmey
- Graduate Group in Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA; Departments of Physiology and Physics, University of Pennsylvania, Philadelphia, PA 19104, USA
| |
Collapse
|
142
|
Liu X, Li H, Li R, Xie D, Ni J, Wu L. Strong non-classical induction forces in ion-surface interactions: general origin of Hofmeister effects. Sci Rep 2014; 4:5047. [PMID: 24854224 PMCID: PMC7365329 DOI: 10.1038/srep05047] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 05/06/2014] [Indexed: 11/25/2022] Open
Abstract
Hofmeister effects continue to defy all-encompassing theories and their origin
is still a matter of debate. We observed strong Hofmeister effects in
Ca2+/Na+ exchange on a
permanently charged surface over a wide range of ionic strengths. They could not be
attributed to dispersion forces, classical induction forces, ionic size, or
hydration effects. We demonstrated that another stronger force was active in the
ion-surface interactions and which would create Hofmeister effects in general. The
strength of this force was up to 104 times that of the
classical induction force and could be comparable to the Coulomb force. Coulomb,
dispersion and hydration effects appeared to be interwined to affect the force. The
presence of the observed strong non-classical induction force implied that energies
of non-valence electrons of ions/atoms at the interface might be heavily
underestimated in current theories and possibly just those underestimated energies
of non-valence electrons determined Hofmeister effects.
Collapse
Affiliation(s)
- Xinmin Liu
- Chongqing key laboratory of soil multi-scale interfacial process, College of Resources and Environment, Southwest University, Chongqing 400715, CHINA
| | - Hang Li
- Chongqing key laboratory of soil multi-scale interfacial process, College of Resources and Environment, Southwest University, Chongqing 400715, CHINA
| | - Rui Li
- Chongqing key laboratory of soil multi-scale interfacial process, College of Resources and Environment, Southwest University, Chongqing 400715, CHINA
| | - Deti Xie
- Chongqing key laboratory of soil multi-scale interfacial process, College of Resources and Environment, Southwest University, Chongqing 400715, CHINA
| | - Jiupai Ni
- Chongqing key laboratory of soil multi-scale interfacial process, College of Resources and Environment, Southwest University, Chongqing 400715, CHINA
| | - Laosheng Wu
- Department of Environmental Sciences, University of California, Riverside, CA 92501, USA
| |
Collapse
|
143
|
Hau NT, Chen SS, Nguyen NC, Huang KZ, Ngo HH, Guo W. Exploration of EDTA sodium salt as novel draw solution in forward osmosis process for dewatering of high nutrient sludge. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.12.068] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
144
|
Zhu B, Hong Z, Milne N, Doherty CM, Zou L, Lin Y, Hill AJ, Gu X, Duke M. Desalination of seawater ion complexes by MFI-type zeolite membranes: Temperature and long term stability. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.10.071] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
145
|
Mineral surface charge development in mixed electrolyte solutions. J Colloid Interface Sci 2014; 418:246-53. [DOI: 10.1016/j.jcis.2013.11.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 11/15/2013] [Accepted: 11/19/2013] [Indexed: 11/30/2022]
|
146
|
Ngo V, Stefanovski D, Haas S, Farley RA. Non-equilibrium dynamics contribute to ion selectivity in the KcsA channel. PLoS One 2014; 9:e86079. [PMID: 24465882 PMCID: PMC3895005 DOI: 10.1371/journal.pone.0086079] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 12/09/2013] [Indexed: 12/05/2022] Open
Abstract
The ability of biological ion channels to conduct selected ions across cell membranes is critical for the survival of both animal and bacterial cells. Numerous investigations of ion selectivity have been conducted over more than 50 years, yet the mechanisms whereby the channels select certain ions and reject others are not well understood. Here we report a new application of Jarzynski’s Equality to investigate the mechanism of ion selectivity using non-equilibrium molecular dynamics simulations of Na+ and K+ ions moving through the KcsA channel. The simulations show that the selectivity filter of KcsA adapts and responds to the presence of the ions with structural rearrangements that are different for Na+ and K+. These structural rearrangements facilitate entry of K+ ions into the selectivity filter and permeation through the channel, and rejection of Na+ ions. A mechanistic model of ion selectivity by this channel based on the results of the simulations relates the structural rearrangement of the selectivity filter to the differential dehydration of ions and multiple-ion occupancy and describes a mechanism to efficiently select and conduct K+. Estimates of the K+/Na+ selectivity ratio and steady state ion conductance for KcsA from the simulations are in good quantitative agreement with experimental measurements. This model also accurately describes experimental observations of channel block by cytoplasmic Na+ ions, the “punch through” relief of channel block by cytoplasmic positive voltages, and is consistent with the knock-on mechanism of ion permeation.
Collapse
Affiliation(s)
- Van Ngo
- Department of Physics and Astronomy, University of Southern California, Los Angeles, California, United States of America
| | - Darko Stefanovski
- Department of Biomedical Sciences, Cedars Sinai Medical Center, Los Angeles, California, United States of America
- Department of Physiology and Biophysics, University of Southern California, Keck School of Medicine, Los Angeles, California, United States of America
| | - Stephan Haas
- Department of Physics and Astronomy, University of Southern California, Los Angeles, California, United States of America
| | - Robert A. Farley
- Department of Physiology and Biophysics, University of Southern California, Keck School of Medicine, Los Angeles, California, United States of America
- * E-mail:
| |
Collapse
|
147
|
Counterion-mediated cluster formation by polyphosphoinositides. Chem Phys Lipids 2014; 182:38-51. [PMID: 24440472 DOI: 10.1016/j.chemphyslip.2014.01.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 12/11/2013] [Accepted: 01/06/2014] [Indexed: 02/06/2023]
Abstract
Polyphosphoinositides (PPI) and in particular PI(4,5)P2, are among the most highly charged molecules in cell membranes, are important in many cellular signaling pathways, and are frequently targeted by peripheral polybasic proteins for anchoring through electrostatic interactions. Such interactions between PIP2 and proteins containing polybasic stretches depend on the physical state and the lateral distribution of PIP2 within the inner leaflet of the cell's lipid bilayer. The physical and chemical properties of PIP2 such as pH-dependent changes in headgroup ionization and area per molecule as determined by experiments together with molecular simulations that predict headgroup conformations at various ionization states have revealed the electrostatic properties and phase behavior of PIP2-containing membranes. This review focuses on recent experimental and computational developments in defining the physical chemistry of PIP2 and its interactions with counterions. Ca(2+)-induced changes in PIP2 charge, conformation, and lateral structure within the membrane are documented by numerous experimental and computational studies. A simplified electrostatic model successfully predicts the Ca(2+)-driven formation of PIP2 clusters but cannot account for the different effects of Ca(2+) and Mg(2+) on PIP2-containing membranes. A more recent computational study is able to see the difference between Ca(2+) and Mg(2+) binding to PIP2 in the absence of a membrane and without cluster formation. Spectroscopic studies suggest that divalent cation- and multivalent polyamine-induced changes in the PIP2 lateral distribution in model membrane are also different, and not simply related to the net charge of the counterion. Among these differences is the capacity of Ca(2+) but not other polycations to induce nm scale clusters of PIP2 in fluid membranes. Recent super resolution optical studies show that PIP2 forms nanoclusters in the inner leaflet of a plasma membrane with a similar size distribution as those induced by Ca(2+) in model membranes. The mechanisms by which PIP2 forms nanoclusters and other structures inside a cell remain to be determined, but the unique electrostatic properties of PIP2 and its interactions with multivalent counterions might have particular physiological relevance.
Collapse
|
148
|
Liu CK, Warr GG. Hexagonal closest-packed spheres liquid crystalline phases stabilised by strongly hydrated counterions. SOFT MATTER 2014; 10:83-7. [PMID: 24651949 DOI: 10.1039/c3sm52339j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The sequence and structure of lyotropic liquid crystals formed in C12-C16 alkyltrimethylammonium surfactants with hydrolysable and multivalent phosphate (PO4(3-), HPO4(2-) and H2PO4(-)), oxalate (HC2O4(-) and C2O4(2-)), and carbonate (HCO3(-)/CO3(2-)) counterions were determined using a concentration gradient method coupled with polarising optical microscopy and small angle X-ray scattering. In addition to the discrete cubic (I1, space group Pm3n) and hexagonal (H1, p6m) phases, almost all of these surfactants also formed the (previously) rare hexagonally closest-packed spheres (HCPS, P63/mmc) phase at compositions between the Pm3n cubic and L1 micellar phases. This structure has not been previously observed in cationic surfactants, but is readily achieved by using strongly hydrated counterions to stabilise spherical micelles at high concentrations.
Collapse
Affiliation(s)
- Connie K Liu
- School of Chemistry F11, The University of Sydney, NSW, 2006 Australia.
| | | |
Collapse
|
149
|
Kumar E, Bhatnagar A, Hogland W, Marques M, Sillanpää M. Interaction of inorganic anions with iron-mineral adsorbents in aqueous media--a review. Adv Colloid Interface Sci 2014; 203:11-21. [PMID: 24246164 DOI: 10.1016/j.cis.2013.10.026] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Revised: 10/22/2013] [Accepted: 10/23/2013] [Indexed: 11/17/2022]
Abstract
A number of inorganic anions (e.g., nitrate, fluoride, bromate, phosphate, and perchlorate) have been reported in alarming concentrations in numerous drinking water sources around the world. Their presence even in very low concentrations may cause serious environmental and health related problems. Due to the presence and significance of iron minerals in the natural aquatic environment and increasing application of iron in water treatment, the knowledge of the structure of iron and iron minerals and their interactions with aquatic pollutants, especially inorganic anions in water are of great importance. Iron minerals have been known since long as potential adsorbents for the removal of inorganic anions from aqueous phase. The chemistry of iron and iron minerals reactions in water is complex. The adsorption ability of iron and iron minerals towards inorganic anions is influenced by several factors such as, surface characteristics of the adsorbent (surface area, density, pore volume, porosity, pore size distribution, pHpzc, purity), pH of the solution, and ionic strength. Furthermore, the physico-chemical properties of inorganic anions (pore size, ionic radius, bulk diffusion coefficient) also significantly influence the adsorption process. The aim of this paper is to provide an overview of the properties of iron and iron minerals and their reactivity with some important inorganic anionic contaminants present in water. It also summarizes the usage of iron and iron minerals in water treatment technology.
Collapse
Affiliation(s)
- Eva Kumar
- Department of Biology and Environmental Science, Faculty of Health and Life Sciences, Linnaeus University, SE-391 82 Kalmar, Sweden
| | - Amit Bhatnagar
- Department of Biology and Environmental Science, Faculty of Health and Life Sciences, Linnaeus University, SE-391 82 Kalmar, Sweden.
| | - William Hogland
- Department of Biology and Environmental Science, Faculty of Health and Life Sciences, Linnaeus University, SE-391 82 Kalmar, Sweden
| | - Marcia Marques
- Department of Biology and Environmental Science, Faculty of Health and Life Sciences, Linnaeus University, SE-391 82 Kalmar, Sweden; Department of Sanitary and Environmental Engineering, Rio de Janeiro State University, UERJ, Rio de Janeiro, Brazil
| | - Mika Sillanpää
- Laboratory of Green Chemistry, Faculty of Technology, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland
| |
Collapse
|
150
|
|