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

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

Journal of hazardous materials, 2014-04, Vol.270, p.144-152 [Periódico revisado por pares]

Kidlington: Elsevier B.V

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Título:
Adsorption characteristics of selected hydrophilic and hydrophobic micropollutants in water using activated carbon
Autor: Nam, Seung-Woo ; Choi, Dae-Jin ; Kim, Seung-Kyu ; Her, Namguk ; Zoh, Kyung-Duk
Assuntos: 2,4-Dichlorophenoxyacetic Acid - chemistry ; Acetaminophen - chemistry ; Activated carbon ; Adsorption ; Applied sciences ; Atrazine - chemistry ; Caffeine - chemistry ; Carbanilides - chemistry ; Carbon - chemistry ; Chemical engineering ; Continental surface waters ; Diclofenac - chemistry ; Dissolved organic matter ; Endocrine Disruptors - chemistry ; Exact sciences and technology ; Freundlich isotherm ; Hydrogen-Ion Concentration ; Hydrophobic and Hydrophilic Interactions ; Hydrophobicity ; Linear isotherm ; Naproxen - chemistry ; Natural water pollution ; Pesticides - chemistry ; Pharmaceutical Preparations - chemistry ; Pollution ; Sulfamethazine - chemistry ; Sulfamethoxazole - chemistry ; Temperature ; Waste Disposal, Fluid ; Water Pollutants, Chemical - chemistry ; Water Purification ; Water treatment and pollution
É parte de: Journal of hazardous materials, 2014-04, Vol.270, p.144-152
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: •Carbon dose and contact time affected micropollutant adsorption to activated carbon.•Hydrophilics better fit to linear, and hydrophobics better to Freundlich isotherm.•Adsorption of hydrophilic micropollutant was significantly affected by pH.•DOM in surface water competed with micropollutants in the adsorption to activated carbon.•Low temperature decreased the adsorption of hydrophobic micropollutants. In this study, we investigated adsorption characteristics of nine selected micropollutants (six pharmaceuticals, two pesticides, and one endocrine disruptor) in water using an activated carbon. The effects of carbon dosage, contact time, pH, DOM (dissolved organic matter), and temperature on the adsorption removal of micropollutants were examined. Increasing carbon dosage and contact time enhanced the removal of micropollutants. Sorption coefficients of hydrophilic compounds (caffeine, acetaminophen, sulfamethoxazole, and sulfamethazine) fit a linear isotherm and hydrophobic compounds (naproxen, diclofenac, 2, 4-D, triclocarban, and atrazine) fit a Freundlich isotherm. The removal of hydrophobic pollutants and caffeine were independent of pH changes, but acetaminophen, sulfamethazine, and sulfamethoxazole were adsorbed by mainly electrostatic interaction with activated carbon and so were affected by pH. The decrease in adsorption removal in surface water samples was observed and this decrease was more significant for hydrophobic than hydrophilic compounds. The decline in the adsorption capacity in surface water samples is caused by the competitive inhibition of DOM with micropollutants onto activated carbon. Low temperature (5°C) also decreased the adsorption removal of micropollutants, and affected hydrophobic compounds more than hydrophilic compounds. The results obtained in this study can be applied to optimize the adsorption capacities of micropollutants using activated carbon in water treatment process.
Editor: Kidlington: Elsevier B.V
Idioma: Inglês

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

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

Kidlington: Elsevier B.V

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