The dynamic adsorption characteristics of phenol by ...

2006-9-1 · mass of granular activated carbon (g) Q. ... were tried to remove phenols from wastewater, activated carbon, was still the most widely used adsorbent to this end. The adsorption by activated carbon has emerged as the most efficient and the most economical process for removing undesirable organic materials from aqueous solution,,,, . The ...

Adsorption characteristics of phenol and chlorophenols on ...

1976-5-1 · After washing, all carbon samples were placed in glass baking pans, dried in an oven at 105-110 for 24 hr, and stored in a desiccator at room temperature until used. Experimental system. The experimental sys- tem selected for evaluating the kinetics of adsorption of phenols on granular activated carbon was a batch reactor.

Adsorption with Activated Carbon

2017-11-21 · Granular activated carbon (GAC) adsorption is a process used as tertiary treatment of municipal and industrial wastewater (physical-chemical treatment, followed by secondary treatment) or as a step in the physical-chemical treatment (coagulation, sedimentation, filtration, GAC adsorption) instead of the secondary treatment. In case of

Adsorption of Phenols onto Granular Activated Carbon in a ...

The adsorption of phenol, p-chlorophenol and p-nitrophenol onto granular activated carbon (GAC) in a liquid–solid fluidized-bed adsorber has been studied. The effects of particle sizes of activated carbon (0·937, 1·524 mm), liquid flow rate (1·2, 2·0, 4·0 dm3 min−1), initial phenol concentrations (1·12×10−4, 5·88×10−4 mol dm−3) and activated carbon mass (75, 150, 300 g) were ...

Adsorption of phenol and chlorophenols onto granular ...

BACKGROUND The adsorption and desorption of phenol, 2-chlorophenol (2-CPh), 4-chlorophenol (4-CPh) and 2,4-dichlorophenol (2,4-DCPh) were carried out using granular activated carbon (GAC) as ...

Evaluation of an activated carbon packed bed for the ...

2017-1-23 · The performance of an adsorption column packed with granular activated carbon was evaluated for the removal of phenols from refinery wastewater. The effects of phenol feed concentration (80–182 mg/l), feed flow rate (5–20 ml/min), and activated carbon packing mass (5–15 g) on the breakthrough characteristics of the adsorption system were determined. The …

Modeling of adsorption isotherms of phenol and ...

2013-2-9 · Modeling of adsorption isotherms of phenol and chlorophenols onto granular activated carbon Part II. Models with more than two parameters Oualid Hamdaouia,∗, Emmanuel Naffrechouxb a Department of Process Engineering, Faculty of Engineering, University of Annaba, P.O. Box 12, 23000 Annaba, Algeria

Granular Activated Carbon Adsorption of 2 …

2009-3-13 · Pilot- and laboratory-scale granular activated carbon (GAC) studies were conducted to determine the extent of 2-methylisoborneol (MIB) removal from two conventionally treated waters. Two different GACs were evaluated, a wood-based carbon and a coal-based carbon.

GRANULAR ACTIVATED CARBON (GAC) FACT SHEET

2016-8-29 · The use of granular activated carbon (GAC) for water purification became common around the start of the 20th century (1906) when the "activation" process was applied to charcoal (which had been used for centuries). Thermal activation of charcoal greatly improves its pore volume, surface area and

Modeling of adsorption isotherms of phenol and ...

2013-2-9 · nol and chlorophenols from aqueous solutions onto granular activated carbon (GAC). The representation of the adsorption isotherms onto activated carbon can be based on models with two, three, even with more parameters [13–17]. The goal of this first part is to apprehend the interactions phenols–GAC through the validity of isotherm models.

Adsorption of Nitrate onto ZnCl2-Modified Coconut …

Coconut granular activated carbon (CGAC) was modified by impregnating with ZnCl 2 solution to remove nitrate from aqueous solutions. Sorption isotherm and kinetic studies were carried out in a series of batch experiments. Nitrate adsorption of both ZnCl 2 -modified CGAC and CGAC fitted the Langmuir and Freundlich models.

Activated Carbon Adsorption of Some Phenolic …

Single solute and simultaneous experimental adsorption isotherms of three phenolic compounds: gallic acid, p-hydroxybenzoic acid and syringic acid, have been investigated at 20, 30 and 40°C, using a bituminous coal based activated carbon.Regardless of temperature, the capacity of the activated carbon used to adsorb these compounds presented the following order: syringic acid …

Emerging contaminants removal by granular activated …

The removal of emergent contaminants via adsorption on granular activated carbon, prepared from Macauba palm, has been studied, contributing to the recovery of the residual biomass, endocarp, obtained in the Macauba palm oil extraction process. The material was characterized by different techniques, …

Removal of Phenols by Granular Activated Carbon in ...

Aqueous phase adsorption of phenols by granular activated carbon was studied in a batch adsorption vessel. Adsorption Isotherms of phenol(Ph), p-chlorophenol(PCP) and p-nitrophenol (PNP) from aqueous solution on granular activated carbon have been obtained.

Adsorption of phenolic compounds by activated carbon--a ...

Adsorption of phenol and its derivatives on activated carbons is considered based on numerous papers related to this issue. Special attention is paid to the effects of carbon surface functionalities, pH of solution and heterogeneity effects that accompany adsorption of …

Modeling of fixed bed adsorption of phenols on granular ...

2008-7-4 · Mathematical modeling of liquid phase adsorption of phenols in fixed beds of granular activated carbon was investigated. The model considered the effects of axial diffusion in the fluid, the external film and internal diffusional mass transfer resistances of the particles, and the nonlinear adsorption isotherm of Freundlich. It was shown that the analysis of a complex …

Phenol removal by adsorption on granular activated …

The effect of 48-kHz ultrasound on the adsorption and desorption of phenol from aqueous solutions onto coconut shell-based granular activated carbons was studied at 25 degrees C. Experiments were ...

Equilibrium Adsorption of Chlorophenols on Granular ...

activated carbon/organic acid systems. This present work concerns the adsorption of chlorinated phenols by granular activated carbon from aqueous solutions under varying pH conditions and presents a surface complex ation model for describing the effect of pH on adsorption of chlorophenols on activated carbon. Materials and methods Chemicals.

Adsorption Isotherms for Phenol Onto Activated Carbon ...

Adsorption Isotherms for Phenol Onto Activated Carbon This laboratory study investigated the effectiveness of two types of activated carbons (ACs), NORIT Granular Activated Carbon (NAC 1240) and NORIT Granular Activated Carbon 010 (NAC 010), for the removal of phenol from aqueous solutions.

Adsorption characteristics of phenol and chlorophenols on ...

2001-11-1 · The order of adsorption capacity among the carbon adsorbents was R0.8>R1>R2>CG, which was consistent with that of the contents of olefinic double bonds in activated carbon structure. It can be interpreted that the dispersion force between the π-electrons of double bonds in activated carbon and the π-electrons in phenol molecules is the main ...

A Study of the Adsorption of Phenol by Activated …

the amount of active carbon increases. At 0.1 g of active carbon, almost 99% phenol was recovered from solutions. Therefore, 0.1 g of active carbon was used in all subsequent studies. Figure 1 also indicates that even at 0.02 g of active carbon, the percentage adsorption is …

Phenol Adsorption in Water by Granular Activated Carbon ...

2019-12-16 · Phenol adsorption by granular activated carbon from coconut shell was studied in batch experiments under various initial phenol concentrations. Adsorption equilibrium was reached within 4 hours. The characteristics of the phenol adsorption process onto granular activated carbon from coconut shell were studied by adsorption isotherm modeling, analysis …

Adsorption with Granular Activated Carbon (GAC)

2018-2-12 · Adsorption Processes Utilizing Granular Activated Carbon (GAC) for Wastewater Treatment In all these processes the wastewater is contacted with granular activated carbon (GAC) typically in a semi-batch or continuous operation. Processes that utilize this type of carbon include: • Fixed-bed or expanded-bed adsorption

Adsorption of phenol and chlorophenols onto granular ...

2013-10-9 · BACKGROUND. The adsorption and desorption of phenol, 2‐chlorophenol (2‐CPh), 4‐chlorophenol (4‐CPh) and 2,4‐dichlorophenol (2,4‐DCPh) were carried out using granular activated carbon (GAC) as adsorbent and supercritical CO 2 as regenerant. Adsorption studies at three different temperatures were fitted by using two thermodynamic adsorption models, …

Application of double filtration with activated carbon for ...

2018-3-21 · Due to the molecular stability and solubility of phenols in water, their removal by conventional water treatment methods is inefficient. However, adsorption with granular activated carbon (GAC), after conventional filtration with sand and anthracite, is an efficient technique for the reduction of organic compounds such as phenols.

ADSORPTION EQUILIBRIUM AND KINETIC STUDIES OF …

2019-7-25 · Adsorption equilibrium and kinetic studies of phenols and substituted phenols at Para position in an aqueous phase was carried out in the present study. The adsorbent used in study was Granular Activated Carbon (GAC). Bituminous type of coal was source of the granular activated carbon (GAC). The mesh size of GAC used in the study was 12X16.

The adsorption of phenol on granular activated carbon ...

2021-8-4 · The Freundlich isotherm modeled the adsorption data best with a maximum equilibrium constant, K F of 0.138 occurring at 85°C. The standard enthalpy change and standard entropy change were 155.48 kJ/mol and 0.44 kJ/mol K respectively and the Gibbs free energy change ranged from 5.89–46.3 kJ/mol for the temperature range studied.

Competitive Adsorption of Phenols on Activated Carbon ...

The adsorption of phenol and substituted phenols on activated carbon was examined. Mixtures of phenolic compounds were employed to test the Ideal Adsorbed Solution (IAS) theory using an improved method of calculation that had been developed for the description of …