Electrochemical treatment of alkali decrement wastewater containing terephthalic acid using iron electrodes

Anand, Murarka Vivek; Srivastava, Vimal Chandra; Singh, Seema; Bhatnagar, R. P.; Mall, Indra Deo

doi:10.1016/j.jtice.2013.08.010

Cited by 36 publications

(11 citation statements)

References 14 publications

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“…Recent studies show increases in the ED results and a decrease in removal efficiency due to the fall in ohmic tension between the cathode and the anode (Anand et al, 2014;Attour et al, 2014;Merzouk et al, 2010;Zhang et al, 2013). However, in our study an inverse effect was observed, where an increase in 1 cm ED of 2 and 3 cm favored the removal of color, turbidity and TOC.…”

Section: Resultscontrasting

confidence: 58%

Swine manure digestate treatment using electrocoagulation

Kunz

Steffens

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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Anaerobic biodigestion is an appropriate alternative for the treatment of swine wastewater due to its biogas generation properties and the possibility of its application as a source of energy for heating or electricity. However, digestate can still contain high levels of turbidity, organic carbon and nutrients and must be correctly managed as a biofertilizer, or treated to avoid any impact on the environment. Considering this, electrocoagulation (EC) shows promise as a technology because of its ease of handling and high efficiency in effluent remediation. This study aimed to evaluate the performance of EC in a batch system in the treatment of swine wastewater digestate. The wastewater used in the treatment was sampled from a 10 m 3 biodigestor effluent (digestate) located at Concórdia, Santa Catarina, Brazil. A batch-scale experiment was carried out to evaluate the following two variables: electrode distance (ED) and voltage applied (V). The removal efficiency levels (%) for the best operational condition (2 cm, 5 V) after 30 min were: 97 %, 98 %, 77 % and 10 % for color, turbidity, total organic carbon (TOC) and total nitrogen (TN), respectively. The EC batch system produced efficient results, underlining its promise as an alternative to be applied in the treatment of digestate.

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Section: Resultscontrasting

confidence: 58%

Swine manure digestate treatment using electrocoagulation

Kunz

Steffens

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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“…Several treatment methods such as fixed bed reactor [7,8], electrochemical oxidation [9][10], photo-oxidation [11], enzyme catalytic oxidation under bio catalytic micro-reactor [12], oxidation [13], and electro-catalytic oxidation have been used for removal of phenolic compounds such as HQ from aqueous solution. Among all these methods, oxidation is economically and ecologically most promising technique [14] to convert phenolic compound into its harmless intermediates which also show antifungal, antibacterial, antiviral and anticancer activities [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Tyagi

Das

Srivastava

2018

Environmental Engineering Research

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In this study, iron (Fe) impregnated granular activated carbon (Fe-GAC) has been synthesized and characterized for various properties. Comparative studies have been performed for use of Fe-GAC as an adsorbent as well as a catalyst during catalytic oxidation of hydroquinone (HQ). In the batch adsorption study, effect of process parameter like initial HQ concentration (Co = 25-1,000 mg/L), pH (2-10), contact time (t: 0-24 h), temperature (T: 15-45°C) and adsorbent dose (w: 5-50 g/L) have been studied. Maximum HQ adsorption efficiency of 75% was obtained at optimum parametric condition of: pH = 4, w = 40 g/L and t = 14 h. Pseudo-second order model best-fitted the HQ adsorption kinetics whereas Langmuir model best-represented the isothermal equilibrium behavior. During oxidation studies, effect of various process parameters like initial HQ concentration (Co: 20-100 mg/L), pH (4-8), oxidant dose (CH2O2: 0.4-1.6 mL/L) and catalyst dose (m: 0.5-1.5 g/L) have been optimized using Taguchi experimental design matrix. Maximum HQ removal efficiency of 83.56% was obtained at optimum condition of Co = 100 mg/L, pH = 6, CH2O2 = 0.4 mL/L, and m = 1 g/L. Overall use of Fe-GAC during catalytic oxidation seems to be a better as compared to its use an adsorbent for treatment of HQ bearing wastewater.

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“…These materials have exhibited great performance on the production of chlorine derivates during the electrochemical treatment of wastewaters [18]. Regarding the electrochemical production of hydrogen peroxide, the search of new electrode materials to obtain higher production rates of hydrogen peroxide has become matter of interest for several authors [19,20]. Thus, carbon felt emerges as a promising cathode material to produce hydrogen peroxide in high concentrations [21][22][23][24][25] as this material presents higher specific area than other electrodes made of carbon such as carbon cloth or graphite.…”

Section: Introductionmentioning

confidence: 99%

Use of carbon felt cathodes for the electrochemical reclamation of urban treated wastewaters

Cotillas

Llanos

Rodrigo

et al. 2015

Applied Catalysis B: Environmental

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This work focuses on the application of electrolysis with carbon felt cathodes for the reclamation of actual effluents from municipal wastewater treatment facilities (WWTFs) in combination with different anode materials (dimensionally stable anodes-DSA, conductive diamond anodes-CDA and iron-Fe). First of all, the efficiency of electrodisinfection with CDA and DSA was assessed, finding that total elimination of Escherichia coli (E. coli) can be attained at applied electric charges below 0.03 Ah dm-3 , and that the disinfection process is more efficient when using CDA. Furthermore, it was observed that the formation of hydrogen peroxide on carbon felt cathodes limits the concurrence of disinfection by-products (chlorates, perchlorates and organic chlorinated by-products), an interesting result that broadens the potential of CDA for the regeneration of urban wastewater. Results with Fe anodes show that it is possible to attain the complete removal of microorganisms with comparable efficiency to that of CDA (due to the contribution of Fenton's reaction) and that it was possible to totally remove the turbidity of the effluent when working at current densities from 12.50 A m-2. Finally, it was found that Fe is the most efficient anode material (lowest power consumption) at low current densities and CDA is the most appropriate one at current densities higher than 5 A m-2. According to these results, the pairs anode-cathode CDA-carbon felt and Fe-carbon felt behave as the most promising electrode materials to be applied in wastewater reclamation processes.

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Electrochemical treatment of alkali decrement wastewater containing terephthalic acid using iron electrodes

Cited by 36 publications

References 14 publications

Swine manure digestate treatment using electrocoagulation

Swine manure digestate treatment using electrocoagulation

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Use of carbon felt cathodes for the electrochemical reclamation of urban treated wastewaters

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