A ground water treatment process is described in whichcontaminants are adsorbed onto granulated activated car-bon (GAC) containing fixed iron oxide. Hydrogen peroxide(H2O2) is amended to the GAC suspension and reacts withthe iron, forming hydroxyl radicals (·OH). The radicals reactwith and oxidize sorbed and soluble contaminants regen-erating the carbon surface. Laborato...

Nanometer zinc oxide (ZnO) powders were used as a catalyst to enhance the ozonation for the degradation of dichloroacetic acid (DCAA) in aqueous solution. The batch experiments were carried out to investigate the effects of key factors such as catalyst dosage, ozone dosage, solution pH and tert-butyl alcohol (t-BuOH) on the degradation efficiency of DCAA. Density functional theory (DFT) was ado...

In recent years, metal-organic frameworks (MOFs) have been extensively investigated as electrocatalysts due to their highly efficient electroreduction of CO2. Herein, the electrocatalytic CO2 reduction reaction was by growing helical Cu-porphyrinic MOF Cu meso-tetra(4-carboxyphenyl)porphyrin (TCPP) on Cu(OH)2 nanoarrays (H-CuTCPP@Cu(OH)2) using a sacrificial template method. The results showed ...

The physic and chemical characterization of the bentonite clay from Chiqui Gómez deposit, central Cuba, (Cuban clay) shows that it is mainly constituted by sodium montmorillonite (>90%), with a structural formula for one-layer unit determined as (Na3.99Al0.01)(Al1.11Fe3+0.49Mg0.18Ti0.07)(Ca0.24Na0.15K0.01)O10(OH)2. Cuban has specific surface area 80 m2g-1, pore volume about 0.0776 cm3g-1, 61...

The adsorption of water on Pt(111) surface has been studied with ab initio molecular dynamics simulation. Both the energetics and vibrational dynamics indicate the existence of a well-ordered molecular bilayer on this surface. This conclusion is in contrast to the recent result of water on Ru(0001) surface, but agrees with available experiments. In addition, our calculation identifies two diffe...

Despite considerable attention in the literature being given to the desorption behaviour of smaller volatiles, the thermal properties of complex organics, such as ethanol (C(2)H(5)OH), which are predicted to be formed within interstellar ices, have yet to be characterized. With this in mind, reflection absorption infrared spectroscopy (RAIRS) and temperature programmed desorption (TPD) have bee...

The use of regenerated activated carbon as an immobilizing additive for phenol in solidification/stabilization (S/S) processes was investigated. The adsorption capacity of regenerated carbon was compared to that of the virgin form and was found to be very close. The effects of pH and Ca(OH)(2) concentration within the S/S monolith on the adsorption process were also examined. Kinetic tests were...

The adsorption of H₂ on LaNiO₃ was investigated using density functional theory (DFT) calculations. The adsorption sites, adsorption energy, and electronic structure of LaNiO₃(001)/H₂ systems were calculated and indicated through the calculated surface energy that the (001) surface was the most stable surface. By looking at optimized structure, adsorption energy and dissociation energy, we foun...

background chitin and its derivatives (chitosan) are natural biopolymer produced from crustacean shell, which due to their active functional groups such as amine and hydroxyl have high ability to absorb heavy metals from water and wastewater. the aim of this study was to investigate zinc removal from aqueous solutions by using chitin extracted from shrimp shells. material and methods to study t...