Role of dissolved oxygen on the adsorptive capacity of activated carbon for synthetic and natural organic matter

Vidić, Radisav D.; Suidan, Makram T.

doi:10.1021/es00021a013

Cited by 126 publications

(81 citation statements)

References 11 publications

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“…Singlesolute isotherms for each of the compounds were obtained using the Freundlich equation; q = kc l/n (Abuzaid and Nakhla 1994;Abuzaid et al 1995). Our results for o-cresol and 4-nitrophenol also indicate that oxygen enhances their adsorption, which is what other research groups also found (Vidic and Suidan 1991).…”

Section: Resultssupporting

confidence: 90%

Carbon-Catalyzed Oxidative Coupling of Phenolic Compounds

Osei-Twum

Abuzaid

Nahkla

1996

Bulletin of Environmental Contamination and Toxicology

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Section: Resultssupporting

confidence: 90%

Carbon-Catalyzed Oxidative Coupling of Phenolic Compounds

Osei-Twum

Abuzaid

Nahkla

1996

Bulletin of Environmental Contamination and Toxicology

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“…Activation process of the ALPC by immersing it in a strong acid (HCl) might change the clay mineral's structure, and created more heterogeneous adsorption sites and increased its specific surface [33]. The kF values obtained from NOM adsorption onto the LCP and the ALCP were 12.6 and 14.91, respectively, while if compared with other studies, which using nanomaterials and carbon materials as adsorbents, their kF values obtained were in a range of 100-200 [34], [35]. This means that the adsorption capacity values yielded by the LCP and ALCP were smaller than other materials.…”

Section: Nom Adsorption Isothermsmentioning

confidence: 84%

Adsorption of Natural Organic Matter (Nom) in Peat Water by Local Indonesia Tropical Clay Soils

Notodarmojo¹

2017

GEOMATE

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A series of experiment on the adsorption of natural organic matter (NOM) originated from peat water in Central Kalimantan, Indonesia by local peat clay soils had been carried out. A selected local peat clay soil (LPC) and activated local peat clay soil (ALPC) had been used as adsorbents. The activation of the local peat clay soil was carried out by immersing it in 1 M HCl solution at 900 o C. The effects of pH on the adsorption capacities were investigated. It has been found that at lower pHs (3-5) the adsorption capacities increased significantly. A rotary shaker was set at 180 rpm as an agitator in performing the kinetically behaviour and adsorption isotherm of NOM onto the LPC and the ALPC. It was found that the equilibration time for the LPC and the ALPC were 180 and 150 minutes, respectively. The kinetics equation model that most fitted to the adsorption experimental data for the both adsorbents was pseudo-second order kinetics model (r 2 > 0.99). The Dubinin-Radushkevich depicted the data more accurately to describe the NOM-LPC and NOM-LAPC adsorption isotherms (r 2 > 0.99). Further analysis on the peat water NOM characteristics and local clay (LPC and ALPC) suggested that physical adsorption, mainly electrostatic interactions enhanced adsorption process and hydrophobic or solute driven adsorption dominated in the early stage of the process, followed by a chemical adsorption process.

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“…Physical adsorption processes dominate at short equilibration times, low temperatures, low pH, and low concentrations of molecular oxygen. In contrast, oxidative coupling, a polymerization reaction catalyzed by carbon surfaces in which phenol multimers are formed through C-O and C-C linkages, becomes important under opposite conditions in each of the above respects [8][9][10].…”

Section: Introductionmentioning

confidence: 99%