This paper presents experimental results of the ozonation of a model aromatic sulphonic compound, 1,3,6-naphthalenetrisulphonic acid (NTS), in the presence of different activated carbons with different physical and chemical surface properties. Carbons used were commercial activated carbons (Ceca AC40, Norit, Merck, Witco, Ceca GAC, Filtrasorb 400, Sorbo) with or without demineralisation pre-tre...

The paper presents the use of Pyrolox™ containing manganese nano oxides used for the removal of Cu(II), Zn(II), Cd(II), and Pb(II) as well as U(VI) ions. Their concentrations were analyzed using the atomic absorption spectrometer SpectrAA 240 FS (Varian) as well as UV-vis method. For this purpose the static kinetic and equilibrium studies were carried out using the batch technique. The effect o...

In this study, the raw seashells of Mactra aequisulcata, class Bivalvia and phylum Mollusca were employed as an adsorbent to remove copper (II) cadmium metal ions from aqueous solution. The characterization shells was performed using FTIR, EDX SEM, BET isotherm point zero charge (pHpzc). Batch experiments assess various factors on biosorption efficiency. Maximum adsorption both metals convenien...

Fe-deposited titanate nanotubes (Fe-TNTs) with high photocatalytic activity and adsorptive performance were synthesized through a one-step hydrothermal method. Initial As(III) oxidation followed by As(V) adsorption by Fe-TNTs could simultaneously remove these two toxic pollutants from aqueous solutions. The apparent rate constant value for photo-oxidation of As(III) under UV irradiation by Fe-T...

Zero-valent iron has received considerable attention for its potential application in the removal of heavy metals from water. This paper considers the possibility of removal of zinc ions from water by causing precipitates to form on the surface of iron. The chemical states and the atomic concentrations of solids which have formed on the surface of zero-valent iron as well as the type of the dep...

In this work, equilibrium and dynamic adsorption tests of cadmium Cd (II) on activated carbons derived from different oxidation treatments (with either HNO₃, H₂O₂, or NaOCl, corresponding to GACoxN, GACoxP, and GACoxCl samples) are presented. The oxidation treatments determined an increase in the surface functional groups (mainly the acidic ones) and a decrease in the pHPZC (except for the GACo...

Adsorption of cationic dye crystal violet (CV) onto a modified walnut shell (WS) adsorbent was investigated. Combined treatment WS using urea and sodium dodecylsulfate (SDS) carried out. Surface modification adsorbents confirmed by FTIR analysis, pHpzc measurements, elemental SEM-EDX analysis. In order to optimize the adsorption conditions, effect solution pH, dose CV concentration studied mean...

This paper presents the results of Pb2+ adsorption from synthetic Pb(NO3)2 solutions, using beech sawdust and wheat straw as adsorbents. Physicochemical characterization adsorbents included specific surface area, pHpzc, SEM-EDS FTIR analysis. Adsorption kinetics isotherms, well changes in pH solution during process, were monitored analyzed. The showed that is explained by pseudosecond order kin...

A simple one-pot procedure under mild conditions has been developed with the aim of preparing a set hybrid organic-inorganic multifunctional materials. This is based on use catechol and KIO4 as oxidizing agent in conjunction 3-aminopropyl-, substituted 3-aminopropyl- 3-methylimidazolium-1-trimethoxypropylsilane mimicking polydopamine-like chemistry. Reactions were carried out water at room temp...

Glyphosate is an herbicide that usually used by farmers and considered harmful to the environment in excess amounts. To address these issues, coffee-husk-biochar-loaded Fe3O4 (CHB- Fe3O4) was as adsorbent remove glyphosate from water. CHB-Fe3O4 characteristics such pHpzc, FTIR, SEM were measured understand properties of this adsorbent. The best conditions for removal obtained at pH 2.0, where a...