A membrane-based electrochemical flow reactor for generation of ferrates at near neutral pH conditions

2019 ◽  
Vol 4 (6) ◽  
pp. 1116-1125 ◽  
Author(s):  
Macarena A. Cataldo-Hernández ◽  
Arman Bonakdarpour ◽  
Joseph T. English ◽  
Madjid Mohseni ◽  
David P. Wilkinson
Keyword(s):  
Flow Reactor ◽  
Boron Doped Diamond ◽  
Neutral Ph ◽  
Boron Doped ◽  
Ph Conditions ◽  
Reactor Operating ◽  
Neutral Conditions

We report the electrosynthesis of Fe(vi) in a flow reactor operating in batch recirculation mode at neutral conditions using boron doped diamond (BDD) and Fe(iii).

Degradation of profenofos in an electrochemical flow reactor using boron-doped diamond anodes

2013 ◽  
Vol 32 ◽  
pp. 54-60 ◽  
Author(s):  
G.S. Cordeiro ◽  
R.S. Rocha ◽  
R.B. Valim ◽  
F.L. Migliorini ◽  
M.R. Baldan ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Boron Doped Diamond ◽  
Boron Doped

scholarly journals A new insight into the restriction of Cr(VI) removal performance of activated carbon under neutral pH condition

2021 ◽  
Author(s):  
Yi Fang ◽  
Ke Yang ◽  
Yipeng Zhang ◽  
Changsheng Peng ◽  
Aurora Robledo-Cabrera ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Photoelectron Spectroscopy ◽  
Toxic Heavy Metal ◽  
X Ray ◽  
Neutral Ph ◽  
Removal Capacity ◽  
Ph Conditions ◽  
Neutral Conditions ◽  
The Impact

Abstract Activated carbon has been widely used to remove hazardous Cr(VI), however, the impact of Cr2O3 precipitate on gradually declined removal ability as pH increased has received little attention. Herein, to investigate the effect of Cr2O3, SEM-EDX (scanning electron microscope-energy dispersive X-ray analysis) coupling elements mapping of chromium loaded powder activated carbon (PAC) revealed that a chromium layer was formed on the PAC exterior after being treated with Cr(VI) at pH 7. XPS (X-ray photoelectron spectroscopy) study confirmed that 69.93% and 39.91% Cr2O3 precipitated on the PAC surface at pH 7 and pH 3, respectively, corresponding to 17.77 mg/g and 20 mg/g removal capacity. Exhausted PAC had a removal efficiency of 92.43% after Cr2O3 being washed by H2SO4 solution, which was much higher than the removal efficiency of 51.27 % after NaOH washing. This further verified the intrinsically developed Cr2O3 precipitate on PAC under neutral conditions limited the durability of PAC as an adsorbent. Consecutive elution assessments confirmed that adsorption and reduction ability both declined as pH increased. Raman spectroscopy and C 1s spectra of materials demonstrated two distinct Cr(VI) removal mechanisms under pH 3 and pH 7. In conclusion, the exhausted AC after Cr(VI) adsorption can be rejuvenated after the surface coated Cr2O3 being washed by the acid solution which can expand the longevity of AC and recover Cr(III). HIGHLIGHT In this work, we scrutinized the mechanism of poor removal capacity of commercial activated carbon on toxic heavy metal Cr(VI) under neutral pH conditions. Differing from the most accepted view that electrostatic repulsion is the main consideration, our study suggested that the relatively more Cr2O3 precipitate on the surface of activated carbon under higher pH led to the low Cr(VI) sequestration capability.

scholarly journals Removal of the drug procaine from acidic aqueous solutions using a flow reactor with a boron-doped diamond anode

2019 ◽  
Vol 216 ◽  
pp. 65-73 ◽  
Author(s):  
Nathalia M.P. Queiroz ◽  
Ignasi Sirés ◽  
Carmem L.P.S. Zanta ◽  
Josealdo Tonholo ◽  
Enric Brillas
Keyword(s):  
Aqueous Solutions ◽  
Flow Reactor ◽  
Boron Doped Diamond ◽  
Boron Doped

Electrochemical combustion of herbicide mecoprop in aqueous medium using a flow reactor with a boron-doped diamond anode

Chemosphere ◽  
2006 ◽  
Vol 64 (6) ◽  
pp. 892-902 ◽  
Author(s):  
Cristina Flox ◽  
Pere Lluís Cabot ◽  
Francesc Centellas ◽  
José Antonio Garrido ◽  
Rosa María Rodríguez ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Flow Reactor ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Electrochemical Combustion

Solar photoelectro-Fenton degradation of cresols using a flow reactor with a boron-doped diamond anode

2007 ◽  
Vol 75 (1-2) ◽  
pp. 17-28 ◽  
Author(s):  
C FLOX ◽  
P CABOT ◽  
F CENTELLAS ◽  
J GARRIDO ◽  
R RODRIGUEZ ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Boron Doped Diamond ◽  
Boron Doped

Electrocatalytic hydrogen evolution under neutral pH conditions: current understandings, recent advances, and future prospects

2020 ◽  
Vol 13 (10) ◽  
pp. 3185-3206 ◽  
Author(s):  
Zheng Zhou ◽  
Zengxia Pei ◽  
Li Wei ◽  
Shenlong Zhao ◽  
Xian Jian ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Future Prospects ◽  
Neutral Ph ◽  
Recent Advances ◽  
Ph Conditions ◽  
Neutral Conditions

This review summarizes the latest advances in hydrogen evolution reaction under neutral conditions to enlighten future researches.

Electrochemical degradation of bisphenol A using a flow reactor with a boron-doped diamond anode

2012 ◽  
Vol 198-199 ◽  
pp. 282-288 ◽  
Author(s):  
Gabriel F. Pereira ◽  
Romeu C. Rocha-Filho ◽  
Nerilso Bocchi ◽  
Sonia R. Biaggio
Keyword(s):  
Bisphenol A ◽  
Flow Reactor ◽  
Electrochemical Degradation ◽  
Boron Doped Diamond ◽  
Boron Doped
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