The recovery and removal of the most organic acids in liquid solutions is usually treated with fixed-bed adsorption processes. Among many adsorbents, Granular Activated Carbon (GAC) is used to remove organic pollutants such as Benzoic Acid (BA) from wastewaters conventionally. In this research, adsorption isotherm curves of BA onto GAC at varying temperatures 25-60 °C are developed and the ...

Abstract Adsorption of perfluoroalkyl acids (PFAAs) by granular activated carbon (GAC) was evaluated in bench‐, pilot‐, and full‐scale studies to determine effects PFAA characteristics background organic matter on use rates. Rapid small‐scale column tests (RSSCTs) were conducted according the proportional diffusivity (PD) design assess their suitability predict full‐ or pilot‐scale GAC performa...

Sorption uptake kinetics and equilibrium studies for 4-hydroxy-3-nitrobenzene arsonic acid (roxarsone) was evaluated with synthetic magnetite (Mag-P), commercial magnetite (Mag-C), magnetite 10%, 19%, and 32% composite material (CM-10, -19, -32) that contains granular activated carbon (GAC), and synthetic goethite at pH 7.00 in water at 21 °C for 24 h. GAC showed the highest sorptive removal of...

Abstract Biobarrier combines the adsorption and biodegradation processes which are carried out simultaneously. This method can increase rate of contaminant reduction, reduce toxicity extend life activated carbon. study aims to evaluate characteristics benzene toluene on granular carbon (GAC). The ratio in expanded bed fixed determines operating conditions process experiment. results showed that...

bubble column reactors are used in a wide variety of applications such as multiphase bioreactors, catalytic slurry reactors, and absorption processes. the superficial gas velocity-gas holdup relationship and transition point are two important parameters for characterizing the hydrodynamics of a bubble column reactor. in this study, systematic investigation of a nitrogen - water - glass beads bu...

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...

A three-dimensional (3D) electrochemical flow-through reactor equipped with GAC packed bed, polarized by the electric field, was evaluated for removal of persistent organic contaminants from real sewage effluent. The performance investigated 27 consecutive runs at two anodic current densities, i.e., low density (LCD) 15 m-2, and high (HCD) 100 m-2. In HCD experiments, adsorption ability saturat...

Soil pollution with heavy metals not only reduces crop yields, but also negatively affects human and animal health. Even such a biophilic element as Zn, when excessively supplied to living organisms, has toxic effect. The introduction of sorbents into the soil makes it possible ensure binding pollutants in situ, leading decrease their mobility biological availability. In course work, efficiency...