The behavior of surface acidity on photo-Fenton degradation of ciprofloxacin over sludge derived carbon: Performance and mechanism

A straw-activated carbon has been successfully synthesized with the high BET surface area, at 494.9240 m2/g, which is perfectly suitable for the adsorption of cephalexin antibiotic from aqueous water. It is noted that the adsorption capacity of straw-activated carbon is demonstrated by the effect of initial concentration, contact time, pH solution and dosage. The straw-activated carbon exhibited improved decontaminant efficiency towards cephalexin antibiotics. Quick and improved sorption could be attributable to the distinctive structural and compositional merits as well as the synergetic contribution of functional groups to surface material. Most interestingly, the adsorption capacity achieved at pH 6 was ~98.52%. A mechanism adsorption has been proposed to demonstrate adsorption of the straw-activated carbon (AC-S). By comparison with other studies, it is confirmed that AC-S in this study obtained a higher removal efficiency than other adsorbent materials, suggesting that straw-activated carbon may be an appropriate candidate to treat cephalexin from wastewater media

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Mineralization of phenol by ozone combined with activated carbon: Performance and mechanism under different pH levels

Environmental Science and Ecotechnology ◽

10.1016/j.ese.2019.100005 ◽

2020 ◽

Vol 1 ◽

pp. 100005 ◽

Cited By ~ 1

Author(s):

Wei Xiong ◽

Weihua Cui ◽

Rui Li ◽

Chuanping Feng ◽

Yang Liu ◽

...

Keyword(s):

Activated Carbon ◽

Carbon Performance ◽

Performance And Mechanism

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Research on the Pavement Performance and Mechanism of Rock Asphalt Modified Asphalt Mixture

CICTP 2020 ◽

10.1061/9780784483053.114 ◽

2020 ◽

Author(s):

Yong Yang ◽

Peng Huang ◽

Wen Zhou ◽

Haiting Liu ◽

Lingling Hong

Keyword(s):

Asphalt Mixture ◽

Pavement Performance ◽

Modified Asphalt ◽

Performance And Mechanism

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The effect of composition of cobalt-molybdenum catalysts on their surface acidity and isomerisation activity

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19800697 ◽

1980 ◽

Vol 45 (3) ◽

pp. 697-702 ◽

Cited By ~ 1

Author(s):

Vlastimil Vyskočil ◽

Miroslav Zdražil

Keyword(s):

Chromatographic Method ◽

Surface Acidity ◽

Parallel Reaction ◽

Molybdenum Catalysts ◽

The Difference ◽

Kinetics Of ◽

Alumina Catalysts

Kinetics of isomerisation of cyclohexene to methylcyclopentene proceeding as parallel reaction to hydrogenation of cyclohexene to cyclohexane on cobalt-molybdenum catalysts of different composition has been measured. The surface acidity of these catalysts was estimated from the difference in the adsorption of toluene and heptane which was measured by chromatographic method. In a series of catalysts containing molybdenum the acidity parallels isomerisation activity. Cobalt on alumina catalysts and alumina itself have greater acidity but exhibit lower isomerisation activity compared to the catalysts containing molybdenum.

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Post-Plasma Catalysis for Trichloroethylene Abatement with Ce-Doped Birnessite Downstream DC Corona Discharge Reactor

Catalysts ◽

10.3390/catal11080946 ◽

2021 ◽

Vol 11 (8) ◽

pp. 946

Author(s):

Grêce Abdallah ◽

Jean-Marc Giraudon ◽

Rim Bitar ◽

Nathalie De Geyter ◽

Rino Morent ◽

...

Keyword(s):

Corona Discharge ◽

Active Oxygen Species ◽

Surface Acidity ◽

Good Stability ◽

Ozone Decomposition ◽

Moist Air ◽

Plasma Catalysis ◽

Dry Air ◽

Water Tolerance ◽

By Products

Trichloroethylene (TCE) removal was investigated in a post-plasma catalysis (PPC) configuration in nearly dry air (RH = 0.7%) and moist air (RH = 15%), using, for non-thermal plasma (NTP), a 10-pin-to-plate negative DC corona discharge and, for PPC, Ce0.01Mn as a catalyst, calcined at 400 °C (Ce0.01Mn-400) or treated with nitric acid (Ce0.01Mn-AT). One of the key points was to take advantage of the ozone emitted from NTP as a potential source of active oxygen species for further oxidation, at a very low temperature (100 °C), of untreated TCE and of potential gaseous hazardous by-products from the NTP. The plasma-assisted Ce0.01Mn-AT catalyst presented the best CO2 yield in dry air, with minimization of the formation of gaseous chlorinated by-products. This result was attributed to the high level of oxygen vacancies with a higher amount of Mn3+, improved specific surface area and strong surface acidity. These features also allow the promotion of ozone decomposition efficiency. Both catalysts exhibited good stability towards chlorine. Ce0.01Mn-AT tested in moist air (RH = 15%) showed good stability as a function of time, indicating good water tolerance also.

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