in this work, the removal of copper from an aqueous solution by granular activated carbon (gac) in the presence of competitor ions was studied. a batch adsorption was carried out and different parameters such as ph, contact time, initial copper concentration and competitor ions concentration were changed to determine the optimum conditions for adsorption. the optimum ph required for maximum ads...

the main goal of this study is to investigate the capability of zeolites a and p synthesized from iranian natural clinoptilolite for uranium uptak. the removal of uranium(vi) from aqueous solution via ion exchange by zeolites in a single component system with various contact times,  temperatures and initial concentrations of uranium(vi) was investigated. the experimental results were fitted to ...

batch experiments were conducted to study the adsorption behaviors of lead ion (pb2+) onto ferrihydrites prepared using three different procedures which were characterized  by textural analysis (bet). the adsorption removal of pb2+ by the three ferrihydrites (called fh-1, fh-2 and fh-3, respectively) were compared, and fh-3 shows fast adsorption kinetics as well as high adsorption capacities, t...

using the mixed solvents, (water +ethanol + propanol), the solubility of cdf2 was determined byevaporating method at 25° c. the results showed that the sollbility, s, of cdf2 decreases bydecreasing the dielectric constant of the mixed solvent .once the solubility of cdf2 was determined,the concentration solubility product, ksp(c)=4s3, was calculated .furthermore ,by estimating the meanactivity ...

Abstract Synthetic single crystals of K[(Cu II ,Mn III ) 2 (TeO 3 ]·2H O were obtained from an overconcentrated alkaline aqueous solution in the system K O-MnO-CuO-TeO under hydrothermal conditions at T ≤ 220 °C. Subeuhedral have been investigated by means single-crystal X-ray diffraction. The crystal structure this new zemannite-type representative adopts a monoclinic twofold superstructure. d...

Catalytic activity and stability of iron hexacyanocobaltate (FeIII[CoIII(CN)6], Fe–Co) for organophosphate hydrolysis are improved by doping divalent metal ions (MII = MnII, NiII, or CuII). The catalytic a series (FeIII0.8MII0.3)[CoIII(CN)6] (FeM–Co compounds) was examined in mixed solution water ethanol [9:1 (v/v)] containing disodium p-nitrophenyl phosphate (p-NPP) at 60 °C. FeM–Co compounds ...

Electrochemical energy storage systems are categorized into different types, according to their mechanisms, including capacitors, supercapacitors, batteries and fuel cells. All battery systems include some main components: anode, cathode, an aqueous/non-aqueous electrolyte and a membrane that separates anode and cathode while being permeable to ions. Being one of the key parts of any new electr...