Electrochemical Wastewater Treatment Processes

Chen, Guohua; Hung, Yung‐Tse

doi:10.1007/978-1-59745-173-4_2

Cited by 24 publications

(25 citation statements)

References 162 publications

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“…It has been also observed by Gurseset al (37) that the removal efficiency of colloidal particles in the pH range of 4-7 leads to the formation of amorphous hydroxide precipitates and other aluminum-hydroxo complexes with hydroxide ions and polymeric species. Therefore, pH is an important factor in EC process and its variation is usually caused by the solubility of metal hydroxides.…”

Section: Effect Of Phmentioning

confidence: 76%

Disinfection of Biologically Treated Municipal Wastewater using Electrochemical Process

Chopra

Sharma

2014

Separation Science and Technology

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The present study demonstrates the application of Al-Al electrode combination for electrochemical disinfection of biologically treated municipal wastewater (BTMW) of Sewage Treatment Plant. A glass chamber of 2 liter volume was used for the Electrochemical (EC) process using two electrode plates of aluminum (Al-Al) with DC power supply at different operating conditions of current density (CD), operating time (OT), inter electrode distance (IED), electrode area (EA), initial pH, and settling time (ST). The maximum removal of total coliforms (TC) (99.99%) and total bacteria (TB) (99.87%) from BTMW was achieved with the optimum operating conditions of CD (2.65 A/m 2 ), OT (40 mins.), IED (0.5 cm), EA (160 cm 2 ), initial pH (7.5), and ST (60 min.). The efficiency of the EC process for disinfection of BTMW was strongly affected by the CD, OT, IED, EA, pH, and ST. These effects can be explained by the formation of the reactive species such as OH − , and ClO 2 −· during the electrochemical process. Under optimal operating conditions, the operating cost was found to be 1.01 $/m 3 in terms of the electrode consumption (23.71 x 10 −5 kg Al/m 3 ) and energy consumption (101.76 kwh/m 3 ).

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Section: Effect Of Phmentioning

confidence: 76%

Disinfection of Biologically Treated Municipal Wastewater using Electrochemical Process

Chopra

Sharma

2014

Separation Science and Technology

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“…from the water oxidation [23][24][25]. In fact, Ti/TiO2-RuO2-IrO2 showed good performance for the oxygen production (+1.05 V vs. Ag/AgCl/Clsat) respect to Ti/TiO2-RuO2 anode (+1.20 V vs. Ag/AgCl/Clsat).…”

Section: Preliminary Electrochemical Experimentsmentioning

confidence: 90%

“…This device can be used alternatively to understand the CDN redox behavior more deeply, and subsequently, conducting the electrodegradation experiments with DSA ® -type anodes [23]. As can be observed in Figure 2A, only one well-defined anodic peak at +1.06 V (vs. Ag/AgCl/Clsat) was achieved, which is related to the conversion of hydroxylated compounds to quinonic derivatives via a mechanism involving 2e − and 2H + per hydroxyl radical oxidized [7].…”

Section: Preliminary Electrochemical Experimentsmentioning

confidence: 95%

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Electrooxidation of cardanol on mixed metal oxide (RuO2-TiO2 and IrO2-RuO2-TiO2) coated titanium anodes: insights into recalcitrant phenolic compounds

Santos

Medeiros

Oliveira

et al. 2016

Electrochimica Acta

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“…Iron ions hydrolyse and mononuclear complexes are formed depending on pH ( Table 2) [3]. The presence of iron ions and iron complexes destabilise the colloidal particles breaking the emulsion [128]. This process leads to flocculation which generates bigger particles.…”

Section: A Combined Ec-electrooxidation Treatment For Industrial Wastmentioning

confidence: 99%

Advanced oxidation phenomena in electrocoagulation process: a myth or a reality?

Ghernaout

2013

Desalination and Water Treatment

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A B S T R A C TThis review discusses the advanced oxidation process (AOP) phenomena in electrocoagulation (EC) process. AOPs have been broadly defined as near ambient temperature treatment processes based on highly reactive radicals, especially the hydroxyl radical ð Á OHÞ as the primary oxidant. In principle, as water-containing colloidal particulates, oils, or other contaminants move through the applied electric field, there may be ionisation, electrolysis, hydrolysis, and free-radical formation which may alter the physical and chemical properties of water and contaminants. Further, when the electrochemical reactors operate at a high cell potential and an anodic process occurs in the potential region of water discharge, hydroxyl radicals ð Á OHÞ are generated. In order to get more probabilities to have free radicals formation in EC, ultrasound during EC may be very useful as discussed by some authors. Further, EC process at pH less than 3 has more chance to produce hydroxyl radicals formation. Finally, this review concludes that there is no proof of the presence of AOP phenomena in EC process and more research is needed here focusing on free radicals formation.

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Electrochemical Wastewater Treatment Processes

Cited by 24 publications

References 162 publications

Disinfection of Biologically Treated Municipal Wastewater using Electrochemical Process

Disinfection of Biologically Treated Municipal Wastewater using Electrochemical Process

Electrooxidation of cardanol on mixed metal oxide (RuO2-TiO2 and IrO2-RuO2-TiO2) coated titanium anodes: insights into recalcitrant phenolic compounds

Advanced oxidation phenomena in electrocoagulation process: a myth or a reality?

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