background and objectives: because of toxical and hazardous properties of hexavalent chromium (cr(vi)), its removal by an economical and efficient method is necessary. the use of activated carbon, as an adsorbent, is a common and effective method for hexavalent chromium removal. thus the aim of this study was to produce granular and powdered activated carbon form peganum harmala and compare the...

Many pharmaceuticals are found in municipal wastewater effluents due to their persistence in the human body as well as in conventional wastewater treatment processes. This discharge to the environment can lead to adverse effects in aquatic species, such as feminization of male fish. During the past decade, these findings have spawned investigations and research into suitable treatment technolog...

A comparison of adsorption efficiency of the three Granular Activated Carbon (GAC) produced from waste Nigerian Bamboo at different level of activation in a fixed adsorption bed is reported. Bamboo carbonization was done at temperature range of 200-400c and chemically activated at 400c with chloride salt at percentage range of 0-20%. The 0, 10 and 20% level activation were selected for water tr...

The study of the influence operating parameters dynamic adsorption on fixed-bed column manganese oxoanions (MnO4-) in aqueous media granular activated carbon (GAC), prepared from shells palm nuts Gabon, was carried out. studied were particle size, concentration initial solution (C0) MnO4-, flow rate (D) and pH media. results obtained show that best capacities at saturation (Qsat) MnO4- ion CAG ...

Various sampling techniques were employed to study the population dynamics and identify the origin of annually re-occurring infestations of Paratanytarsus grimmii in granular activated carbon (GAC) adsorbers. Larvae overwintered in all adsorbers studied and are the main source of endemic persistent infestations. Significant differences in larval densities were identified between the down-flow c...

Thermal treatment is routinely used to reactivate the spent granular activated carbon (GAC) from water purification facilities. It also an integral part of sewage sludge and municipal solid waste management. This study presents a detailed investigation fate per- polyfluoroalkyl substances (PFAS) one PFAS alternative (GenX) in thermal processes, focusing on effect GAC. We demonstrate that thermo...

The identification of certain organic compounds in drinking water has led water treatment specialists to be increasingly concerned about the eventual risks of such pollutants to the health of consumers. Our experiments focused on the role of ozone and granular activated carbon in removing mutagenic compounds and precursors that become toxic after chlorination. We found that if a sufficient dose...

this paper presents the adsorption of phenol on granular activated carbon (gac) from nutrient medium suitable for roorganisms’ growth and also the subsequent biodegradation. two parameter langmuir and freundlich adsorption isotherm models were studied using large range of phenol concentration (50-1000 mg/l). in low range of phenol concentration (50-300 mg/l), correlation coefficient, normaliz...