Sorptive removal of salicylic acid and ibuprofen from aqueous solutions using pine wood fast pyrolysis biochar

Essandoh, Matthew; Kunwar, Bidhya; Pittman, Charles U.; Mohan, Dinesh; Mlsna, Todd

doi:10.1016/j.cej.2014.12.006

Cited by 324 publications

(112 citation statements)

References 36 publications

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“…7 and Table 2 demonstrate that the adsorption data can be described better by the Langmuir isotherm (R 2 , 0.999) than by the Freundlich isotherm (R 2 , 0.983), Temkin isotherm (R 2 , 0.983) or D-R isotherm (R 2 , 0.878). Similar results were reported for adsorption of persistent organic pollutants, antibiotics and other organic pollutants with carbonaceous materials, such as active carbon, biochar or carbon nanotubes (Carabineiro et al 2012;Zheng et al 2013;Essandoh et al 2015;Ma et al 2015;Mita et al 2015).…”

Section: Adsorption Isothermssupporting

confidence: 84%

Low-cost biochar derived from herbal residue: characterization and application for ciprofloxacin adsorption

Shang

Kong

et al. 2016

Int. J. Environ. Sci. Technol.

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Thermally carbonization biochar produced from a traditional Chinese herbal medicine waste (Astragalus mongholicus residue) was investigated for its performance in ciprofloxacin adsorption. Batch sorption experiments were conducted, and scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller surface area analyses were employed to characterize the biochar. The results demonstrated that thermal activation process improves the adsorbent characteristics. Biochar produced at 800°C had the best adsorption capacity, a better pore structure and the largest surface areas. The adsorption process fit well to a pseudo-second-order kinetics model. The adsorption isothermal model results revealed that the adsorption process of ciprofloxacin is described better by the Freundlich isotherm and the type of adsorption is a chemical process. The maximum adsorption of ciprofloxacin occurred at pH 7. The present research demonstrated that A. mongholicus biochar might be an attractive and cost-effective adsorbent with good adsorption performance for removing ciprofloxacin from water solution.

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Section: Adsorption Isothermssupporting

confidence: 84%

Low-cost biochar derived from herbal residue: characterization and application for ciprofloxacin adsorption

Shang

Kong

et al. 2016

Int. J. Environ. Sci. Technol.

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“…The longer sorption equilibration times for TC with the adsorbents are probably due to the large molecular size of TC. The ultrafine biochar/Fe 3 O 4 and AC/Fe 3 O 4 had faster adsorption of CBZ and TC than traditional porous adsorbents [5,30-32]. The faster adsorption of the CBZ and TC on the biochar/Fe 3 O 4 surface is due to the sorption of the contaminant on the surface of the adsorbent rather than in the micropores.…”

Section: Resultsmentioning

confidence: 99%

Preparation of ultrafine magnetic biochar and activated carbon for pharmaceutical adsorption and subsequent degradation by ball milling

Shan

Deng

Zhao

et al. 2016

Journal of Hazardous Materials

357

118

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Ball milling was used to prepare two ultrafine magnetic biochar/Fe3O4 and activated carbon (AC)/Fe3O4 hybrid materials targeted for use in pharmaceutical removal by adsorption and mechanochemical degradation of pharmaceutical compounds. Both hybrid adsorbents prepared after 2 hours milling exhibited high removal of carbamazepine (CBZ), and were easily separated magnetically. These adsorbents exhibited fast adsorption of CBZ and tetracycline (TC) in the initial 1 hour. The biochar/Fe3O4 had a maximum adsorption capacity of 62.7 mg/g for CBZ and 94.2 mg/g for TC, while values obtained for AC/Fe3O4 were 135.1 mg/g for CBZ and 45.3 mg/g for TC respectively when data were fitted using the Langmuir expression. Solution pH values slightly affected the sorption of TC on the adsorbents, while CBZ sorption was almost pH-independent. The spent adsorbents with adsorbed CBZ and TC were milled to degrade the adsorbed pollutants. The adsorbed TC itself was over 97% degraded after 3 hours of milling, while about half of adsorbed CBZ were remained. The addition of quartz sand was found to improve the mechanochemical degradation of CBZ on biochar/Fe3O4, and its degradation percent was up to 98.4% at the dose of 0.3 g quarts sand/g adsorbent. This research provided an easy method to prepare ultrafine magnetic adsorbents for the effective removal of typical pharmaceuticals from water or wastewater and degrade them using ball milling.

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“…In the examined pH range, ibuprofen sodium occurs in more than 90% in an anion form (for pH = 6.92%; for pH = 10.99%). The higher the pH, the greater the competition between the anions of Ibuprofen sodium and the hydroxide anions present in the water [27].…”

Section: Resultsmentioning

confidence: 99%

Adsorption of selected pharmaceuticals on activated carbons from water

2018

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Abstract. The possibility of using activated carbon for the removal of salicylic acid andiibuprofen sodium has been explored. These compounds are observed in crude and treated sewage and in surface water. The effect of pH on the adsorption efficiency was assessed. Tests were carried out from solutions with pH ranging from 2 to 10 (salicylic acid) and from 6 to 10 (iibuprofen sodium). It was found that the higher pH, the lower the adsorption of the compounds tested. Salicylic acid was most efficiently adsorbed from a solution with pH = 2, in which it occurred mainly in an undissociated form. The achieved efficiency of salicylic acid adsorption from solutions with pH=2 was 91%, while from those with pH=10, it was 55% (Co=4 mmol/L). The efficiency of removing ibuprofen sodium from the pH=6 solution was 64%, while from the pH = 10 solution, 60%.The adsorption of both salicylic acid and ibuprofen sodium follows the kinetics equation of the pseudo-2nd order. For the description of the adsorption isotherms, the Freundlich, Langmuir, Temkin and DubibinRadushkevich models were employed. The both compounds are described with the highest correlation coefficient in the case of the Freundlich equation.

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Sorptive removal of salicylic acid and ibuprofen from aqueous solutions using pine wood fast pyrolysis biochar

Cited by 324 publications

References 36 publications

Low-cost biochar derived from herbal residue: characterization and application for ciprofloxacin adsorption

Low-cost biochar derived from herbal residue: characterization and application for ciprofloxacin adsorption

Preparation of ultrafine magnetic biochar and activated carbon for pharmaceutical adsorption and subsequent degradation by ball milling

Adsorption of selected pharmaceuticals on activated carbons from water

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