Electro-assisted Fenton treatment of ammunition wastewater containing nitramine explosives

Jin Anotai, Piyawat Tanvanit, Sergio GARCIA SEGURA, Ming Chun Lu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The treatment of an actual wastewater from ammunition manufacturing process containing highly hazardous nitramine explosives has been studied by different water treatment technologies based on Fenton's chemistry. The in-situ production of hydroxyl radical as highly oxidizing agent conducted to the overall degradation of the nitramine explosives contained in the effluent samples. The kinetic abatement of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) followed the crescent order Fenton = photo-Fenton > electro-assisted Fenton process. The greater performance of the electro-assisted process is justified by the faster regeneration of Fe2+ from the electrochemical reduction and the oxidation contribution of the heterogeneous hydroxyl radical electrogenerated on the dimensional stable anode surface. On the other hand, similar DOC abatements of ca. 60% were attained after 2 h of treatment for all the technologies, being slightly superior for the photo-Fenton process due to the photodecarboxylation of carboxylate–iron complexes. The evaluation of the BOD5 and COD allowed considering the effluent biodegradability enhancement after Fenton's technologies treatment, being feasible their application prior to a biological treatment. From the by-products identification, degradative pathways of the main nitramine pollutants contained in the actual effluent have been proposed.

Original languageEnglish (US)
Pages (from-to)429-436
Number of pages8
JournalProcess Safety and Environmental Protection
Volume109
DOIs
StatePublished - Jan 1 2017
Externally publishedYes

Fingerprint

Ammunition
explosive
Effluents
Wastewater
effluent
hydroxyl radical
wastewater
Hydroxyl Radical
HMX
Biodegradability
triazine
Water treatment
Oxidants
Byproducts
water treatment
Anodes
manufacturing
regeneration
oxidation
Degradation

Keywords

  • Actual effluent
  • Anodic oxidation
  • electro-Fenton
  • Photo-Fenton
  • RuO/IrO dimensional stable anodes (DSA)
  • Water treatment technologies

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Safety, Risk, Reliability and Quality

Cite this

Electro-assisted Fenton treatment of ammunition wastewater containing nitramine explosives. / Anotai, Jin; Tanvanit, Piyawat; GARCIA SEGURA, Sergio; Lu, Ming Chun.

In: Process Safety and Environmental Protection, Vol. 109, 01.01.2017, p. 429-436.

Research output: Contribution to journalArticle

@article{5e965eda9be94fc9b4daf1647191e7d2,
title = "Electro-assisted Fenton treatment of ammunition wastewater containing nitramine explosives",
abstract = "The treatment of an actual wastewater from ammunition manufacturing process containing highly hazardous nitramine explosives has been studied by different water treatment technologies based on Fenton's chemistry. The in-situ production of hydroxyl radical as highly oxidizing agent conducted to the overall degradation of the nitramine explosives contained in the effluent samples. The kinetic abatement of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) followed the crescent order Fenton = photo-Fenton > electro-assisted Fenton process. The greater performance of the electro-assisted process is justified by the faster regeneration of Fe2+ from the electrochemical reduction and the oxidation contribution of the heterogeneous hydroxyl radical electrogenerated on the dimensional stable anode surface. On the other hand, similar DOC abatements of ca. 60{\%} were attained after 2 h of treatment for all the technologies, being slightly superior for the photo-Fenton process due to the photodecarboxylation of carboxylate–iron complexes. The evaluation of the BOD5 and COD allowed considering the effluent biodegradability enhancement after Fenton's technologies treatment, being feasible their application prior to a biological treatment. From the by-products identification, degradative pathways of the main nitramine pollutants contained in the actual effluent have been proposed.",
keywords = "Actual effluent, Anodic oxidation, electro-Fenton, Photo-Fenton, RuO/IrO dimensional stable anodes (DSA), Water treatment technologies",
author = "Jin Anotai and Piyawat Tanvanit and {GARCIA SEGURA}, Sergio and Lu, {Ming Chun}",
year = "2017",
month = "1",
day = "1",
doi = "10.1016/j.psep.2017.04.018",
language = "English (US)",
volume = "109",
pages = "429--436",
journal = "Process Safety and Environmental Protection",
issn = "0957-5820",
publisher = "Institution of Chemical Engineers",

}

TY - JOUR

T1 - Electro-assisted Fenton treatment of ammunition wastewater containing nitramine explosives

AU - Anotai, Jin

AU - Tanvanit, Piyawat

AU - GARCIA SEGURA, Sergio

AU - Lu, Ming Chun

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The treatment of an actual wastewater from ammunition manufacturing process containing highly hazardous nitramine explosives has been studied by different water treatment technologies based on Fenton's chemistry. The in-situ production of hydroxyl radical as highly oxidizing agent conducted to the overall degradation of the nitramine explosives contained in the effluent samples. The kinetic abatement of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) followed the crescent order Fenton = photo-Fenton > electro-assisted Fenton process. The greater performance of the electro-assisted process is justified by the faster regeneration of Fe2+ from the electrochemical reduction and the oxidation contribution of the heterogeneous hydroxyl radical electrogenerated on the dimensional stable anode surface. On the other hand, similar DOC abatements of ca. 60% were attained after 2 h of treatment for all the technologies, being slightly superior for the photo-Fenton process due to the photodecarboxylation of carboxylate–iron complexes. The evaluation of the BOD5 and COD allowed considering the effluent biodegradability enhancement after Fenton's technologies treatment, being feasible their application prior to a biological treatment. From the by-products identification, degradative pathways of the main nitramine pollutants contained in the actual effluent have been proposed.

AB - The treatment of an actual wastewater from ammunition manufacturing process containing highly hazardous nitramine explosives has been studied by different water treatment technologies based on Fenton's chemistry. The in-situ production of hydroxyl radical as highly oxidizing agent conducted to the overall degradation of the nitramine explosives contained in the effluent samples. The kinetic abatement of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) followed the crescent order Fenton = photo-Fenton > electro-assisted Fenton process. The greater performance of the electro-assisted process is justified by the faster regeneration of Fe2+ from the electrochemical reduction and the oxidation contribution of the heterogeneous hydroxyl radical electrogenerated on the dimensional stable anode surface. On the other hand, similar DOC abatements of ca. 60% were attained after 2 h of treatment for all the technologies, being slightly superior for the photo-Fenton process due to the photodecarboxylation of carboxylate–iron complexes. The evaluation of the BOD5 and COD allowed considering the effluent biodegradability enhancement after Fenton's technologies treatment, being feasible their application prior to a biological treatment. From the by-products identification, degradative pathways of the main nitramine pollutants contained in the actual effluent have been proposed.

KW - Actual effluent

KW - Anodic oxidation

KW - electro-Fenton

KW - Photo-Fenton

KW - RuO/IrO dimensional stable anodes (DSA)

KW - Water treatment technologies

UR - http://www.scopus.com/inward/record.url?scp=85019172222&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019172222&partnerID=8YFLogxK

U2 - 10.1016/j.psep.2017.04.018

DO - 10.1016/j.psep.2017.04.018

M3 - Article

VL - 109

SP - 429

EP - 436

JO - Process Safety and Environmental Protection

JF - Process Safety and Environmental Protection

SN - 0957-5820

ER -