Characteristics and environmental aspects of slag: A review

Mitigation effects of silicon rich amendments on heavy metal accumulation in rice (Oryza sativa L.) planted on multi-metal contaminated acidic soil

Adsorption of proteins and nucleic acids on clay minerals and their interactions: A review

https://northumbria-test.eprints-hosting.org/id/document/273086

Alkaline residues and the environment: A review of impacts, management practices and opportunities

The structures formed by adsorption of carboxyalkylphosphonic acids on metal oxide powders were characterized by solid-state NMR and FTIR-PAS (Fourier transform infrared photoacoustic spectroscopy). A series of diacids, HO2C(CH2)nPO3H2 (n = 2, 3, 11, and 15), were deposited on nonporous TiO2 and ZrO2 powders and nanocrystalline ZrO2 with average particle diameters of 21, 30, and 5 nm, respectively. Solid-state 31P NMR, combined with FTIR-PAS, indicates that the phosphonic acid group binds selectively to the surface, producing a monolayer of carboxylic acid terminated chains. The average chain conformation depends on the substrate in addition to the chain length. Ordered samples display thermal order/disorder transitions similar to other self-assembled monolayer systems. The more restricted chain mobility relative to analogous methyl-terminated chains is attributed to hydrogen-bonding among the pendant carboxylic acid groups. These results demonstrate that phosphonic acids are useful for selectively introd...

Self-Assembly of Carboxyalkylphosphonic Acids on Metal Oxide Powders

The chemical and mineralogical composition of steel slag produced in two ArcelorMittal steel plants located in the North of Spain, as well as the study of the influence of simulated environmental conditions on the properties of the slag stored in disposal areas, was carried out by elemental chemical analysis, XRF, X-ray diffraction, thermal analysis, and scanning electron microscopy with EDS analyzer. Spectroscopic characterization of the slag was also performed by using FTIR spectroscopy. Due to the potential uses of the slag as low cost adsorbent for water treatment and pollutants removal, its detailed textural characterization was carried out by nitrogen adsorption−desorption at 77 K and mercury intrusion porosimetry. The results show that the slag is a crystalline heterogeneous material whose main components are iron oxides, calcium (magnesium) compounds (hydroxide, oxide, silicates, and carbonate), elemental iron, and quartz. The slags are porous materials with specific surface area of 11 m2g−1, cont...

Physico-Chemical Characterization of Steel Slag. Study of its Behavior under Simulated Environmental Conditions

A novel metastable layered titanium phosphate has been synthesized by the treatment of layered titanates (Na2Ti3O7 and Na4Ti9O20) with 1–2 M phosphoric acid solution at 120–150 °C. Based on the data of 31P MAS NMR and IR spectroscopy, x-ray powder diffraction, and thermal and elemental analysis, the formula Ti2O3(H2PO4)2 · 2H2O was assigned to the novel compound. The layered nature of the compound was confirmed from n-alkylamine intercalation and the ion exchange behavior toward alkali, alkaline earth, and some transition metal ions.

Synthesis and characterization of a novel layered titanium phosphate

Structural, textural and protein adsorption properties of kaolinite and surface modified kaolinite adsorbents

Interactions between whey proteins and kaolinite surfaces

By using three synthetic procedures we have prepared layered α-titanium phenylphosphonate samples with different degrees of crystallinity and distinct textural parameters. The solids were prepared by reacting phenylphosphonic acid with different titanium compounds used as precursors. The materials obtained have a high thermal stability as shown by TGA measurements.

María A. Villa-García

Papers

Physico-Chemical Characterization of Steel Slag. Study of its Behavior under Simulated Environmental Conditions

Synthesis and characterization of a novel layered titanium phosphate

Structural, textural and protein adsorption properties of kaolinite and surface modified kaolinite adsorbents

Interactions between whey proteins and kaolinite surfaces

Effect of the method of preparation on the surface area and porosity of titanium(IV) phenylphosphonate