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7988-2012
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ion exchange
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aluminum
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- Author:
- Chun Zhang; Zhou Hong; Jinxian Chen; Xuehong Gu; Wanqin Jin; Nanping Xu
- Source:
- Journal of membrane science 2012 v.389 no. pp. 451-458
- ISSN:
- 0376-7388
- Subject:
- aluminum; artificial membranes; cations; crystallization; energy-dispersive X-ray analysis; ion exchange; isomerization; protons; temperature; xylene; zeolites
- Abstract:
- ... MFI zeolite membranes were synthesized on α-alumina substrates by in situ hydrothermal crystallization. The separation of p-/o-xylene (PX/OX) mixtures was performed to evaluate the quality of MFI zeolite membranes. EDS analysis showed that aluminum from the substrate was incorporated into the zeolite structure during membrane synthesis. The negatively charged aluminosilicate framework possessed io ...
- DOI:
- 10.1016/j.memsci.2011.11.013
- https://doi.org/10.1016/j.memsci.2011.11.013
- Author:
- Holger Lippold; Sascha Eidner; Michael U. Kumke; Johanna Lippmann-Pipke
- Source:
- Applied geochemistry 2012 v.27 no.1 pp. 250-256
- ISSN:
- 0883-2927
- Subject:
- actinides; aluminum; binding sites; colloids; fluorescence emission spectroscopy; geochemistry; humic acids; ion exchange; iron; models; temporal variation; toxicity
- Abstract:
- ... The applicability of equilibrium models for humic-bound transport of toxic or radioactive metals is affected by kinetic processes leading to an increasing inertness of metal–humic complexes. The chemical background is not yet understood. It is widely believed that bound metals undergo an in-diffusion process within the humic colloids, changing from weaker to stronger binding sites. This work is fo ...
- DOI:
- 10.1016/j.apgeochem.2011.11.001
- https://doi.org/10.1016/j.apgeochem.2011.11.001
- Author:
- Suzan PasvanoÄlu; Fatma Gültekin
- Source:
- Environmental earth sciences 2012 v.66 no.1 pp. 169-182
- ISSN:
- 1866-6280
- Subject:
- aluminum; arsenic; carbon; carbon dioxide; carbonates; chemical composition; cold; copper; heat treatment; hot springs; ion exchange; iron; lakes; lead; limestone; manganese; metamorphic rocks; mineralization; nickel; pH; rain; sandstone; temperature; wells; zinc
- Abstract:
- ... The Terme and Karakurt thermal resorts are located in the center of KirÅehir city in central Anatolia. Thermal waters with temperatures of 44â60°C are used for central heating and balneologic purposes. Paleozoic rocks of the KirÅehir Massif are the oldest units in the study area. The basement of the Massif comprises Paleozoic metamorphic schist and marbles which partly contain white quartzite ...
- DOI:
- 10.1007/s12665-011-1217-3
- https://doi.org/10.1007/s12665-011-1217-3
- Author:
- Joanna Kluczka; Maria Zołotajkin; Jerzy Ciba
- Source:
- Archives of environmental protection 2012 v.38 no.1 pp. 83-96
- ISSN:
- 2083-4810
- Subject:
- aluminum; aquatic organisms; exchangeable aluminum; ion exchange; mineralization; ponds; risk; sediments; spectrophotometers; statistical analysis; toxicity
- Abstract:
- ... Water and bottom sediment samples collected from a few fish-breeding ponds/reservoirs were subjected to tests. The aim of this paper was to determine the total content of aluminium and its fractions in the samples tested to estimate the potential risk to fish caused by the toxic forms of aluminium. The monomeric inorganic aluminium in waters was determined using the ion exchange and extraction-col ...
- DOI:
- 10.2478/v10265-012-0007-7
- https://doi.org/10.2478/v10265-012-0007-7
- Author:
- Yuhao Lu; Long Wang; Jie Song; Dawei Zhang; Maowen Xu; John B. Goodenough
- Source:
- Journal of materials chemistry A 2012 v.1 no.1 pp. 68-72
- ISSN:
- 2050-7496
- Subject:
- aluminum; aqueous solutions; cathodes; electrochemistry; ion exchange; lithium; lithium batteries
- Abstract:
- ... The redox couple, V⁴⁺/V³⁺, exhibits a potential of 3.76 V in NASICON-structured Li₃Al₀.₁V₁.₉(PO₄)₃, which is suitable for a cathode material of a lithium-ion battery. The rhombohedral NASICON framework provides a large interstitial space for fast lithium transport, but the structure has to be prepared by the lithium ion-exchange method from NASICON-structured Na₃V₂(PO₄)₃. We used a LiNO₃ aqueous s ...
- DOI:
- 10.1039/c2ta00029f
- https://doi.org/10.1039/c2ta00029f
- Author:
- Caili Yue; Hongyun Chen; Sailong Xu; Fazhi Zhang
- Source:
- Journal of colloid and interface science 2012 v.385 no.1 pp. 268-273
- ISSN:
- 0021-9797
- Subject:
- air; aluminum; aluminum oxide; bubbles; films (materials); hydroxides; ion exchange; scanning electron microscopy; temperature; ultrasonics; zinc
- Abstract:
- ... Films of laurate (La) anion-intercalated zinc–aluminum layered double hydroxides (ZnAl–La–LDHs) with hollow hemispherical protrusions on the surface of the hybrid film have been conveniently prepared by an ion-exchange reaction of a nitrate-containing LDH film previously grown in situ on a porous anodic alumina/aluminum (PAO/Al) substrate. No template is required to form the hemispherical protrusi ...
- DOI:
- 10.1016/j.jcis.2012.06.008
- https://doi.org/10.1016/j.jcis.2012.06.008
- Author:
- Jixiang Xu; Wenbo Wang; Bin Mu; Aiqin Wang
- Source:
- Colloids and surfaces 2012 v.405 no. pp. 59-64
- ISSN:
- 0927-7757
- Subject:
- aluminum; clay; colloidal properties; colloids; dispersibility; homogenization; ion exchange; ions; microstructure; modulus of elasticity; nitrogen; palygorskite; scanning electron microscopy; sulfates; surface area; viscosity; zeta potential; zirconium
- Abstract:
- ... Palygorskite was modified with inorganic sulfates, including Na₂SO₄, ZnSO₄, Al₂(SO₄)₃, and Zr(SO₄)₂, using the high-pressure homogenization technology. The effects of type and concentration of sulfates on the morphology, micro-structure, surface potential, shear modulus and viscosity of palygorskite were investigated by scanning electron microscopy (SEM), nitrogen adsorption–desorption isotherms ( ...
- DOI:
- 10.1016/j.colsurfa.2012.04.037
- https://doi.org/10.1016/j.colsurfa.2012.04.037
- Author:
- Viswanath R.K. Vadapalli; Mugera W. Gitari; Leslie F. Petrik; Olivier Etchebers; Annabelle Ellendt
- Source:
- Journal of environmental science and health 2012 v.47 no.1 pp. 60-69
- ISSN:
- 1532-4117
- Subject:
- X-ray diffraction; acid mine drainage; aluminum; anions; barium; calcium; cations; cement; copper; feedstocks; fly ash; ion exchange; ion exchange chromatography; iron; lead; magnesium; manganese; mass spectrometry; mixing; modulus of elasticity; neutralization; nickel; pH; sodium; strontium; zeolites; zero wastes; zinc; South Africa
- Abstract:
- ... Fly Ash (FA) from a power station in South Africa was investigated to neutralise and remove contaminants from Acid Mine Drainage (AMD). After this primary treatment the insoluble FA residue namely solid residue (SR) was investigated as a suitable mine backfill material by means of strength testing. Moreover, SR was used to synthesise zeolite-P using a two-step synthesis procedure. Furthermore, the ...
- DOI:
- 10.1080/10934529.2012.629582
- PubMed:
- 22217083
- https://doi.org/10.1080/10934529.2012.629582
- Author:
- Wołowicz Anna; Hubicki Zbigniew
- Source:
- Industrial & Engineering Chemistry Research 2012 v.51 no.51 pp. 16688-16696
- ISSN:
- 1520-5045
- Subject:
- agitation; aluminum; anions; chlorides; engineering; ion exchange; palladium; sorbents; sorption; temperature
- Abstract:
- ... This work focuses on the sorption recovery of palladium(II) present in chloride and chloride–nitrate(V) solutions on the commercial strongly basic anion exchanger Lewatit MonoPlus SR-7. Sorption, kinetic, and equilibrium studies were carried out using batch and dynamic methods. The basic parameters of sorption capacity, recovery degree, distribution coefficient, process rate, and half-exchange tim ...
- DOI:
- 10.1021/ie302304c
- https://doi.org/10.1021/ie302304c
- Author:
- Jin Hou; Junsheng Yuan; Ru Shang
- Source:
- Powder technology 2012 v.226 no. pp. 222-224
- ISSN:
- 0032-5910
- Subject:
- Fourier transform infrared spectroscopy; X-ray diffraction; aluminum; energy; glass; ion exchange; potassium; raw materials; scanning electron microscopy; seawater; silicon; zeolites
- Abstract:
- ... Zeolite W was synthesized by hydrothermal method using sodium aluminate and soluble glass as the raw materials in the absence of organic template. The ion-exchange equilibrium and ion-exchange capacity of the synthetic sample to K⁺ in seawater, as well as the selectivity coefficient to K⁺ in the mixed K⁺–Na⁺ solution were investigated. The sample was characterized by X-ray diffraction (XRD), scann ...
- DOI:
- 10.1016/j.powtec.2012.04.046
- https://doi.org/10.1016/j.powtec.2012.04.046
- Author:
- Zhang Tao; Li Qiurong; Xiao Haiyan; Lu Hongxiao; Zhou Yuming
- Source:
- Industrial & Engineering Chemistry Research 2012 v.51 no.35 pp. 11490-11498
- ISSN:
- 1520-5045
- Subject:
- Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aluminum; blood platelets; coprecipitation; desorption; engineering; fluorides; hydroxides; ion exchange; ions; kinetics; lithium; models; nitrates; nitrogen; pH; pollution control; thermogravimetry; transmission electron microscopy
- Abstract:
- ... A novel adsorbent of Li–Al layered double hydroxides (LDHs) was prepared through the precipitation of metal nitrates and further applied to remove excessive fluoride ions from water. The physical and chemical properties of synthesized materials were examined by powder transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, N₂ adsorption/desorption analysis, and thermogravimetric ...
- DOI:
- 10.1021/ie300863x
- https://doi.org/10.1021/ie300863x