This study evaluates the performance of a polymeric microfiltration membrane, as well as its combination with a coconut granular activated carbon (GAC) pretreatment, in a gravitational filtration module, to improve the quality of water destined to human consumption. The proposed membrane and adsorbent were thoroughly characterized using instrumental techniques, such as contact angle, Brunauer-E...

Perfluorinated compounds (PFCs) consist by a hydrophobic perfluorinated carbon tail and a hydrophilic ionic headgroup. Because of their unique structure, PFCs have a wide variety of applications including active ingredient in fire fighting foams, impregnation for food packing and waterproof breathable fabrics and the producing of teflon. Recently, the research interest for these compounds has b...

Background: X-ray methods have proven to be reliable, accurate and sensitive techniques to study activated carbons in order to define its porous structure and functionality groups. Methods: For the first time, the characterization of the exhaustion level of granular activated carbon (GAC) used in rum production applying methods based on X-ray technology has been explored. In this work, the exha...

In this study, modified granular activated carbon (GAC) and immobilized cells were used to improve the biological efficiency of high-ammonia-nitrogen wastewater treatment using microorganisms. The results showed that sodium-hydroxide-modified (NaOH-GAC) greatly increased numbers ammonia-oxidizing bacteria Alcaligenes sp. TD-94 Paracoccus TD-10. Using NaOH-GAC number by 63.27% over GAC. Compared...

The objective of this study was to compare the efficiency of O3/granular activated carbon (GAC) to enhance ozone transformation into OH radicals, with the common advanced oxidation processes (O3/OH , O3/H2O2). The results obtained with model systems under the given experimental conditions showed that the system O3/OH (pH 9) and O3/H2O2 (pH 7, [H2O2] = 1 10 -5 M) are more efficient than O3/GAC (...

During drinking water treatment, advanced oxidation process (AOP) with O3 and H2O2 may result in by-products, residual BrO3?. The containing BrO3? often flows into subsequent granular activated carbon (GAC) filters. A concentrated solution can be used as GAC modification reagent at 60 °C to improve its adsorption ability. However, whether low concentrations of residuals from AOP modify GAC, the...

Granular activated carbon (GAC) and powdered (PAC) are the two most common forms of with varying particle size range. The goal this study was to analyze key factors (particle activation temperature) affecting surface characteristics GAC PAC derived from palm kernel shell (PKS). morphology suggested that pore network in PKS-PAC is more developed than PKS-GAC owing presence a micropore structure ...

Granular activated carbon (GAC) is added to methanogenic digesters to enhance conversion of wastes to methane, but the mechanism(s) for GAC’s stimulatory effect are poorly understood. GAC has high electrical conductivity and thus it was hypothesized that one mechanism for GAC stimulation of methanogenesis might be to facilitate direct interspecies electron transfer (DIET) between bacteria and m...

Application of Granular Activated Carbon (GAC) in adsorption process has been studied for the advanced treatment of municipal and industrial wastewater. Because of entering poisonous compounds such as furfural, phenol and sulfides into the oily wastewater of Tehran refinery, biological aeration basins of wastewater treatment unit may not have the desired performance of COD reductio...

This study investigates the capacity of granular activated carbon (GAC) for the storage of methane through the equilibrium adsorption. An experimental apparatus consist of a dual adsorption vessel was set up for the measurement of equilibrium adsorption of methane on GAC using volumetric technique (pressure decay). Experimental isotherms of methane adsorption were determined by the measurement ...