Sorption mechanism of naphthalene by diesel soot: Insight from displacement with phenanthrene/p-nitrophenol

In this manuscript an improved sorbent based on modified exfoliated carbon nanoplatelets, applied in the removal of ammonium from aqueous samples, is presented. This sorbent showed better efficiency in comparison with the previous one obtained in our group for ammonium removal, the values of the maximum sorption capacity being improved from 10 to 12.04 mg/g. In terms of kinetics and sorption characteristic parameters, their values were also improved. Based on these results, a sorption mechanism was proposed, taking into account ion-exchange and chemisorption processes at the surface of the oxidized exfoliated carbon nanoplatelets. Future applications for simultaneous removal of other positive charged contaminants from natural waters might be possible.

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Study on the sorption mechanism of middle‐low temperature sorption thermal storage materials from the microscale simulation: A review

International Journal of Energy Research ◽

10.1002/er.6495 ◽

2021 ◽

Author(s):

Yuxiang Zhou ◽

Ting Yan ◽

Weiguo Pan

Keyword(s):

Low Temperature ◽

Thermal Storage ◽

Sorption Mechanism ◽

Storage Materials

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Recycling diesel soot nanoparticles for use as activated carbon in Li ion batteries

Resources Conservation and Recycling ◽

10.1016/j.resconrec.2021.105485 ◽

2021 ◽

Vol 169 ◽

pp. 105485

Author(s):

Sisi Yang ◽

Bertan Ozdogru ◽

Cameron Ketelsleger ◽

Darrell Gregory ◽

Ömer Özgür Çapraz ◽

...

Keyword(s):

Activated Carbon ◽

Diesel Soot ◽

Li Ion Batteries ◽

Li Ion

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Seasonality of the Airborne Ambient Soot Predominant Emission Sources Determined by Raman Microspectroscopy and Thermo-Optical Method

Atmosphere ◽

10.3390/atmos12060768 ◽

2021 ◽

Vol 12 (6) ◽

pp. 768

Author(s):

Natalia Zioła ◽

Kamila Banasik ◽

Mariola Jabłońska ◽

Janusz Janeczek ◽

Barbara Błaszczak ◽

...

Keyword(s):

Coal Combustion ◽

Carbonaceous Material ◽

Optical Transmittance ◽

Diesel Soot ◽

Raman Microspectroscopy ◽

Heating Season ◽

Residential Heating ◽

Long Time ◽

June July ◽

Measurement Campaigns

Raman microspectroscopy and thermo-optical-transmittance (TOT) method were used to study airborne ambient soot collected at the suburban air monitoring station in southern Poland during the residential heating (January-February) and non-heating (June–July) seasons of 2017. Carbonaceous material constituted on average 47.2 wt.% of PM2.5 during the heating season and 26.9 wt.% in the non-heating season. Average concentrations of OC (37.5 ± 11.0 μg/m3) and EC (5.3 ± 1.1 μg/m3) during the heating season were significantly higher than those in the non-heating season (OC = 2.65 ± 0.78 μg/m3, and EC = 0.39 ± 0.18 μg/m3). OC was a chief contributor to the TC mass concentration regardless of the season. All Raman parameters indicated coal combustion and biomass burning were the predominant sources of soot in the heating season. Diesel soot, which is structurally less ordered than soot from other sources, was dominant during the non-heating season. The D1 and G bands area ratio (D1A/GA) was the most sensitive Raman parameter that discriminated between various soot sources, with D1A/GA > 1 for diesel soot, and less than 1 for soot from coal and wood burning. Due to high daily variability of both TOT and Raman spectroscopy data, single-day measurements can be inconclusive regarding the soot source apportionment. Long-time measurement campaigns are recommended.

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