Adsorption characteristics of selected hydrophilic and hydrophobic micropollutants in water using activated carbon

Nam, Seung-Woo; Choi, Daejin; Kim, Seung-Kyu; Her, Namguk; Zoh, Kyung-Duk

doi:10.1016/j.jhazmat.2014.01.037

Cited by 390 publications

(158 citation statements)

References 38 publications

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“…This material also has the capacity for cation/anion-π interactions with metal species, but this process is generally considered to be poor, especially for native AC. The adsorption of species to AC will be directly influenced by environmental factors including pH, ionic concentration, temperature and the concentration of other contaminant species, which can have both positive and negative effects depending on the adsorbate in question [30,[55][56][57]. The physical size of compounds interacting with AC will also have an effect on the adsorption capacity and efficiency, with larger compounds likely to cause pore blockage and limit the diffusion of subsequent smaller species [58,59].…”

Section: Adsorption Mechanism Of Activated Carbonmentioning

confidence: 99%

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Sweetman

May²,

Mebberson³

et al. 2017

161

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Abstract:To ensure the availability of clean water for humans into the future, efficient and cost-effective water purification technology will be required. The rapidly decreasing quality of water and the growing global demand for this scarce resource has driven the pursuit of high-performance purification materials, particularly for application as point-of-use devices. This review will introduce the main types of natural and artificial contaminants that are present in water and the challenges associated with their effective removal. The efficiency and performance of recently developed materials for water purification, with a focus on activated carbon, carbon nanotubes and graphene will be discussed. The recent advances in water purification using these materials is reviewed and their applicability as point-of-use water purification systems discussed.

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Section: Adsorption Mechanism Of Activated Carbonmentioning

confidence: 99%

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Sweetman

May²,

Mebberson³

et al. 2017

161

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“…The data in the figure were subjected to adsorption isotherm models (i.e., linear, Langmuir, Freundlich); however, this resulted in very poor correlations except for those of GAC. Indeed, affinity for adsorption is dependent on the hydrophilic nature of the adsorbed species [14]. PG is a semi-polar hydrophilic chemical with dielectric constants (ε) of 32.…”

Section: Water Quality Analysismentioning

confidence: 99%

Potential of Biofilters for Treatment of De-Icing Chemicals

Raspati

Lindseth

Muthanna

et al. 2018

Water

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Organic de-icing chemicals, such as propylene glycol and potassium formate, cause environmental degradation in receiving water if left untreated, due to the high organic load resulting in oxygen depletion. Biofilters are commonly used for the treatment of biodegradable organic carbon in water treatment. This study investigated the potential for using biofilters for treating organic de-icing compounds. Lab-scale adsorption tests using filter media made of crushed clay (Filtralite) and granular activated carbon were conducted. Further, a column filtration experiment testing two different crushed clay size ranges was carried out investigating the effect of filter media depth, nutrient addition, and filtration rate. The surrogate parameter used to monitor the removal of de-icing chemicals was dissolved organic carbon (DOC). The adsorption test showed no significant adsorption of DOC was observed. The column test showed that the most active separation occurred in the first~20 cm of the filter depth. This was confirmed by results from (1) water quality analysis (i.e., DOC removal and adenosine tri-phosphate (ATP) measurement); and (2) calculations based on a filtration performance analysis (Iwasaki model) and filter hydraulic evaluation (Lindquist diagram). The results showed that, for the highest C:N:P ratio tested (molar ratio of 24:7:1), 50-60% DOC removal was achieved. The addition of nutrients was found to be important for determining the biofilter performance.

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“…The fluctuations shown in the figure are within the standard deviation of the DOC measurement. Indeed, affinity for adsorption is dependent on the hydrophilic nature of the adsorbed species [12]. PG is a semi-polar hydrophilic chemical with dielectric constants (ε) of 32.…”

Section: Lab-scale Adsorption Testmentioning

confidence: 99%

Effect of Grain Size and Nutrient Feeding on the Treatment Potential of Biofilters for Treatment of   De-Icing Chemicals

Gs¹,

Hkh²,

Muthanna³

et al. 2018

Preprint

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Abstract:Biofilter application for treatment of stormwater containing de-icing chemicals commonly applied in airports, propylene glycol and potassium formate, was investigated. Lab-scale adsorption tests using filter media made of crushed clay (Filtralite) and granular activated carbon showed that adsorption was unsuitable for removal of propylene glycol and potassium formate. Column filtration experiment testing two different crushed clay size ranges was conducted. The results showed that DOC removal was dependent on a number of factors. This study investigated the impact of filter depth, nutrients addition, and filtration rate. DOC removal suggested that DOC degradation occurred on the top filter layer. It was shown that the most active separation occurred in the first ~20 cm of filter depth. This was confirmed by results from water quality analysis (i.e. DOC removal and ATP measurement) and calculations based on a filtration performance analysis (Iwasaki model) and filter hydraulic evaluation (Lindquist diagram). It was shown that for the highest C:N:P ratio tested (molar ratio of 24:7:1), 50-60% DOC removal was achieved. Addition of nutrients was found important and determining the biofilter performance.

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Adsorption characteristics of selected hydrophilic and hydrophobic micropollutants in water using activated carbon

Cited by 390 publications

References 38 publications

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Potential of Biofilters for Treatment of De-Icing Chemicals

Effect of Grain Size and Nutrient Feeding on the Treatment Potential of Biofilters for Treatment of   De-Icing Chemicals

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Adsorption characteristics of selected hydrophilic and hydrophobic micropollutants in water using activated carbon

Cited by 390 publications

References 38 publications

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

Potential of Biofilters for Treatment of De-Icing Chemicals

Effect of Grain Size and Nutrient Feeding on the Treatment Potential of Biofilters for Treatment of &nbsp;&nbsp;De-Icing Chemicals

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Effect of Grain Size and Nutrient Feeding on the Treatment Potential of Biofilters for Treatment of De-Icing Chemicals