Adsorption of organic contaminants by graphene nanosheets, carbon nanotubes and granular activated carbons under natural organic matter preloading conditions

Ersan, Gamze; Kaya, Yasemin; Apul, Onur G.; Karanfil, Tanju

doi:10.1016/j.scitotenv.2016.03.224

Cited by 93 publications

(29 citation statements)

References 39 publications

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“…Activated carbons are well known adsorbents in different fields, with environmental applications such as the adsorption of ions in dissolution or to mitigate gas emissions, [13][14][15][16][17] and are used clinically to treat accidental or deliberate drug overdoses, etc. [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Paracetamol in Hospital Wastewater Through Activated Carbon Filters

et al. 2019

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In recent years, pharmaceutical products have been causing a serious environmental problem in hospital wastewater and water purification plants. The elimination of these pollutants is difficult due to their resistance to biological degradation. Paracetamol has been detected in higher concentrations in hospital wastewater than in other buildings. Activated carbons are a good material for removing paracetamol from hospital wastewater. One of the starting materials to obtain activated carbons is kenaf, which is an easy plant to cultivate. To study the elimination of paracetamol from hospital wastewater by activated carbon, the textural and chemical characterization of activated carbon, as well as the kinetic study and the analysis of the paracetamol adsorption mechanism by the adsorbent, have been carried out. The activated carbon samples studied are micro-mesoporous, with high specific surface values. The chemical composition with presence of oxygen groups favours the adsorption process. The adsorption kinetics were adjusted to a pseudo-second order model. The adsorption mechanism followed the intraparticular diffusion model, carried out in two stages: a fast first stage on the surface of the adsorbent and a slow one inside the pore. Based on the kinetic study, the use of this type of carbon is a good application for the removal of paracetamol from hospital wastewater.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Paracetamol in Hospital Wastewater Through Activated Carbon Filters

et al. 2019

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“…It suggests that the pore-filling mechanism is mostly responsible for the adsorption. Generally, small-size organic compounds are responsible for pore-filling [43,53]. In addition, the octanol-water partitioning coefficient (log K ow ), an indicator of hydrophobicity of an organic compound, plays an important role in the adsorption [1].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Adsorption of Nonylphenol to Multi-Walled Carbon Nanotubes: Kinetics and Isotherm Study

et al. 2018

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We explored the occurrence and distribution of nonylphenol (NP) in 13 Taiwanese source waters. From all the surveyed waters, NP was detected at a high concentration, which could be attributed to contamination by wastewater discharges. In this study, we applied modified multi-walled carbon nanotubes (MWCNTs) for removing NP from aqueous solution. The impact of a few experimental factors, i.e., pH, contact time, MWCNTs dose, and temperature on the NP removal efficiency of modified MWCNTs was studied. The maximum adsorption capacity of the MWCNTs was observed to be 1040 mg NP/g when the initial NP concentration was 2.5 mg/L, and the solution pH was 4. The adsorption process followed the Elovich kinetics and the Elovich isotherm, indicating it is multilayer adsorption. The thermodynamic analysis demonstrated the NP adsorption by MWCNTs was thermodynamically satisfactory and, for the most part, endothermic as in the case of phenol adsorption. The result of the current study demonstrated the significance of free binding sites and the pore size of MWCNTs in the NP adsorption. This paper will help to better comprehend the adsorption behavior and mechanism of alkyl phenolic compounds onto MWCNTs.

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“…The number of pores for a given matrix-CNT composite are fixed. This leads to competitive adsorption effects that take place in effluent mixtures, most commonly in the presence of natural organic matter (NOM) [22,48,49,50,51,52].…”

Section: Strategies For Tce Removal: Cnt Membranes and Hybridsmentioning

confidence: 99%

Carbon Nanotube Based Groundwater Remediation: The Case of Trichloroethylene

et al. 2016

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Adsorption of chlorinated organic contaminants (COCs) on carbon nanotubes (CNTs) has been gaining ground as a remedial platform for groundwater treatment. Applications depend on our mechanistic understanding of COC adsorption on CNTs. This paper lays out the nature of competing interactions at play in hybrid, membrane, and pure CNT based systems and presents results with the perspective of existing gaps in design strategies. First, current remediation approaches to trichloroethylene (TCE), the most ubiquitous of the COCs, is presented along with examination of forces contributing to adsorption of analogous contaminants at the molecular level. Second, we present results on TCE adsorption and remediation on pure and hybrid CNT systems with a stress on the specific nature of substrate and molecular architecture that would contribute to competitive adsorption. The delineation of intermolecular interactions that contribute to efficient remediation is needed for custom, scalable field design of purification systems for a wide range of contaminants.

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Adsorption of organic contaminants by graphene nanosheets, carbon nanotubes and granular activated carbons under natural organic matter preloading conditions

Cited by 93 publications

References 39 publications

Adsorption of Paracetamol in Hospital Wastewater Through Activated Carbon Filters

Adsorption of Paracetamol in Hospital Wastewater Through Activated Carbon Filters

Adsorption of Nonylphenol to Multi-Walled Carbon Nanotubes: Kinetics and Isotherm Study

Carbon Nanotube Based Groundwater Remediation: The Case of Trichloroethylene

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