−Landfill leachate is a toxic effluent of a decomposing landfill that is produced when rainwater percolates through the landfill leaching out contaminants and pollutants. Untreated leachate is a potential source for the contamination of soil, surface and ground water. In this study, the treatment processes such as granular activated carbon (GAC) adsorption/bio-sorption (batch), and advanced oxi...

• Estimating the expansion of granular activated carbon (GAC) in water is complex. The incipient porosity GAC much higher compared to rigid particles. Combining fluidisation and characterisation experiments enables modelling. modelling complex but possible. Granular filtration an important unit operation drinking treatment. widely used for its adsorption capabilities as a barrier undesired orga...

The adsorption equilibrium isotherms of five phenolic compounds from aqueous solutions onto granular activated carbon (GAC) were studied and modeled. Phenol (Ph), 2-chlorophenol (2-CP), 4-chlorophenol (4-CP), 2,4-dichlorophenol (DCP), and 2,4,6-trichlorophenol (TCP) were chosen for the adsorption tests. To predict the adsorption isotherms and to determine the characteristic parameters for proce...

This study investigated the effect of oxides on removal As when present in simple mixtures with granular activated carbon (GAC) particles. The performance these was compared other reported GAC-based adsorbents. A standard curve for ultraviolet adsorption vs. concentration obtained using silver diethyldithiocarbamate (SDDC) method to evaluate various samples. preliminary carried out find optimal...

Atrazine removal from water by two polycations pre-adsorbed on montmorillonite was studied. Batch experiments demonstrated that the most suitable composite poly (4-vinylpyridine-co-styrene)-montmorillonite (PVP-co-S90%-mont.) removed 90-99% of atrazine (0.5-28 ppm) within 20-40 min at 0.367% w/w. Calculations employing Langmuir's equation could simulate and predict the kinetics and final extent...

Abstract The herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) has been detected in water bodies worldwide, precluding their use for supply. Despite this, scientific studies assessing the behavior of herbicides treatment systems are scarce, which motivated this study on 2,4-D removal. removal and its relationship with absorbance were investigated using a pilot system comprising coagulation, sedi...

The Rapid Small Scale Column Test (RSSCT) is a small-scale model of a pilot-scale system which is aimed to give performance equal to the full-scale system when loaded with small sized particle adsorbent such as Granular Activated Carbon (GAC). The RSSCT was developed to predict the exclusion of organic compounds on activated carbon adsorbers. The theory behind RSSCT is to scale down the hydrody...

1 For virtually any physical adsorption process, the capacity of an adsorbent decreases as the temperature of the system increases. As the temperature increases the adsorbed molecules acquire sufficient energy to overcome the van der Waals’ attraction, holding them in the condensed-phase and migrating back to the gas-phase. Adsorption is an exothermic process. At low concentrations the heat rel...

High efficiency of NH3 and H2S removal from waste gases was achieved by the biotrickling filter. Granular activated carbon (GAC), inoculated with Arthrobacter oxydans CH8 for NH3 removal and Pseudomonas putida CH11 for H2S removal, was used as packing material. Under conditions in which 100% H2S was removed, extensive tests to eliminate high concentrations of NH3 emission-including removal char...