scholarly journals Electrolytic Oxidation as a Sustainable Method to Transform Urine into Nutrients

Processes ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 460
Author(s):  
Nasr Bensalah ◽  
Sondos Dbira ◽  
Ahmed Bedoui ◽  
Mohammad I. Ahmad
Keyword(s):  
Thin Film ◽  
Oxygen Demand ◽  
Organic Pollution ◽  
Active Chlorine ◽  
Boron Doped Diamond ◽  
Dimensionally Stable Anodes ◽  
Boron Doped ◽  
Electrolytic Oxidation ◽  
Current Densities ◽  
Electrolytic Treatment

In this work, the transformation of urine into nutrients using electrolytic oxidation in a single-compartment electrochemical cell in galvanostatic mode was investigated. The electrolytic oxidation was performed using thin film anode materials: boron-doped diamond (BDD) and dimensionally stable anodes (DSA). The transformation of urine into nutrients was confirmed by the release of nitrate (NO3−) and ammonium (NH4+) ions during electrolytic treatment of synthetic urine aqueous solutions. The removal of chemical oxygen demand (COD) and total organic carbon (TOC) during electrolytic treatment confirmed the conversion of organic pollutants into biocompatible substances. Higher amounts of NO3− and NH4+ were released by electrolytic oxidation using BDD compared to DSA anodes. The removal of COD and TOC was faster using BDD anodes at different current densities. Active chlorine and chloramines were formed during electrolytic treatment, which is advantageous to deactivate any pathogenic microorganisms. Larger quantities of active chlorine and chloramines were measured with DSA anodes. The control of chlorine by-products to concentrations lower than the regulations require can be possible by lowering the current density to values smaller than 20 mA/cm2. Electrolytic oxidation using BDD or DSA thin film anodes seems to be a sustainable method capable of transforming urine into nutrients, removing organic pollution, and deactivating pathogens.

scholarly journals Electrochemical treatment of real petrochemical effluent: current density effect and toxicological tests

2020 ◽  
Vol 82 (11) ◽  
pp. 2304-2315
Author(s):  
Jaqueline Ferreira de Melo ◽  
Danyelle Medeiros de Araújo ◽  
Djalma Ribeiro da Silva ◽  
Paola Villegas-Guzman ◽  
Carlos Alberto Martínez-Huitle
Keyword(s):  
Petrochemical Industry ◽  
Oxygen Demand ◽  
Electrochemical Treatment ◽  
Stem Growth ◽  
Active Chlorine ◽  
Boron Doped Diamond ◽  
Bdd Anode ◽  
Boron Doped ◽  
Short Time ◽  
Northwest Region

Abstract This work aims to investigate the electrochemical treatment of petrochemical industry effluents (from the northwest region of Brazil) mediated by active chlorine species electrogenerated at ruthenium-titanium oxide supported in titanium (Ti/Ru0.3Ti0.7O2) and boron doped diamond (BDD) anodes by applying 15 and 45 mA cm−2. Chemical oxygen demand (COD) determinations and toxicity analyses were carried out in order to evaluate the process extension as well as the possible reuse of the wastewater after treatment. Toxicity was evaluated by assessing the inhibition of lettuce (Lactuca sativa) stem growth, seed germination, and the production of nitrite (NO−2) and nitrate (NO−3) species. Results clearly showed that the best COD reduction performances were reached at the BDD anode, achieving almost 100% of removal in a short time. Degradation of nitrogen-organic compounds generated NO−2 and NO−3 which act as nutrients for lettuce. Toxicity results also indicated that the electrogenerated active chlorine species are persistent in the effluent after the treatment, avoiding the stem growth, and consequently affecting the germination.

Oxidation of Azide Anion at Boron-Doped Diamond Thin-Film Electrodes

1998 ◽  
Vol 70 (8) ◽  
pp. 1502-1510 ◽  
Author(s):  
Jishou Xu ◽  
Greg M. Swain
Keyword(s):  
Thin Film ◽  
Boron Doped Diamond ◽  
Azide Anion ◽  
Diamond Thin Film ◽  
Boron Doped ◽  
Thin Film Electrodes

ChemInform Abstract: Electrodeposition of Metal Adlayers on Boron-Doped Diamond Thin-Film Electrodes.

ChemInform ◽  
2010 ◽  
Vol 26 (29) ◽  
pp. no-no
Author(s):  
M. AWADA ◽  
J. W. STROJEK ◽  
G. M. SWAIN
Keyword(s):  
Thin Film ◽  
Boron Doped Diamond ◽  
Diamond Thin Film ◽  
Boron Doped ◽  
Thin Film Electrodes

Electrochemical degradation of Mordant Blue 13 azo dye using boron-doped diamond and dimensionally stable anodes: influence of experimental parameters and water matrix

2018 ◽  
Vol 25 (30) ◽  
pp. 30425-30440 ◽  
Author(s):  
Tatyana A. Kenova ◽  
Galina V. Kornienko ◽  
Oksana A. Golubtsova ◽  
Vasiliy L. Kornienko ◽  
Nikolay G. Maksimov
Keyword(s):  
Azo Dye ◽  
Electrochemical Degradation ◽  
Boron Doped Diamond ◽  
Dimensionally Stable Anodes ◽  
Water Matrix ◽  
Boron Doped ◽  
Experimental Parameters

Lanthanum Thin Film on Boron-Doped Diamond, Glassy Carbon and Platinum Electrodes—An Electrochemical Approach

2019 ◽  
Vol 19 (7) ◽  
pp. 4116-4122
Author(s):  
Vadivel Selvamani ◽  
Venkatachalam Rajagopal ◽  
Noel Nesakumar ◽  
David Velayutham ◽  
Vembu Suryanarayanan
Keyword(s):  
Thin Film ◽  
Glassy Carbon ◽  
Platinum Electrodes ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Electrochemical Approach

Over 59 mV pH −1 Sensitivity with Fluorocarbon Thin Film via Fluorine Termination for pH Sensing Using Boron‐Doped Diamond Solution‐Gate Field‐Effect Transistors

2020 ◽  
pp. 2000278
Author(s):  
Yu Hao Chang ◽  
Yutaro Iyama ◽  
Kaito Tadenuma ◽  
Shuto Kawaguchi ◽  
Teruaki Takarada ◽  
...  
Keyword(s):  
Thin Film ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Ph Sensing ◽  
Boron Doped Diamond ◽  
Boron Doped
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