Treatment of pharmaceutical-manufacturing wastewaters by UV irradiation/hydrogen peroxide process

Ahmed Bedoui, Khaled Elsaid, Nasr Bensalah, Ahmed Abdel-Wahab

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this study, the treatment of pharmaceutical-manufacturing wastewaters (PMWW) by advanced chemical oxidation using UV irradiation/hydrogen peroxide (H2O2) process has been investigated. Effects of experimental conditions such as H2O2 dose, initial organic matter concentration, temperature and initial pH value on the removal efficiency and kinetics of organic matter were investigated. Results of this study indicated that UV/H 2O2 process can be successfully used to completely destroy aromatic compounds, and to remove chemical oxygen demand (COD) and total organic carbon (TOC) with removal efficiencies more than 95% and 90%, respectively. Kinetic experiments have demonstrated that TOC removal rate followed pseudo-second order kinetics. Rate constants of 1.12×10 -3 A-1 min-1 and 2×10-5 L mg-1 min-1 were calculated for UV absorbance at 277 nm and TOC decay, respectively. These results indicate that the mechanism of pharmaceuticals degradation involves two main steps: (i) Rapid degradation of aromatic compounds by hydroxylation followed by oxidative opening of benzene rings to form aliphatic derivatives and (ii) subsequent slow fragmentation of aliphatic derivatives into small carboxylic acids which are mineralized into CO2, H2O and other inorganic ions during the final steps of degradation.

Original languageEnglish
Pages (from-to)226-234
Number of pages9
JournalJournal of Advanced Oxidation Technologies
Volume14
Issue number2
Publication statusPublished - 1 Jul 2011
Externally publishedYes

Fingerprint

Organic carbon
hydrogen peroxide
Hydrogen Peroxide
Wastewater
manufacturing
aromatic compounds
Aromatic compounds
Irradiation
degradation
Degradation
Biological materials
Kinetics
irradiation
carbon
kinetics
Pharmaceutical Preparations
Derivatives
Hydroxylation
Chemical oxygen demand
Carboxylic Acids

Keywords

  • Degradation
  • Hydroxyl radicals
  • Pharmaceuticals
  • Photochemistry
  • Pollution
  • Remediation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Treatment of pharmaceutical-manufacturing wastewaters by UV irradiation/hydrogen peroxide process. / Bedoui, Ahmed; Elsaid, Khaled; Bensalah, Nasr; Abdel-Wahab, Ahmed.

In: Journal of Advanced Oxidation Technologies, Vol. 14, No. 2, 01.07.2011, p. 226-234.

Research output: Contribution to journalArticle

@article{28106b59cb044f62a09859cc1e2fa7fb,
title = "Treatment of pharmaceutical-manufacturing wastewaters by UV irradiation/hydrogen peroxide process",
abstract = "In this study, the treatment of pharmaceutical-manufacturing wastewaters (PMWW) by advanced chemical oxidation using UV irradiation/hydrogen peroxide (H2O2) process has been investigated. Effects of experimental conditions such as H2O2 dose, initial organic matter concentration, temperature and initial pH value on the removal efficiency and kinetics of organic matter were investigated. Results of this study indicated that UV/H 2O2 process can be successfully used to completely destroy aromatic compounds, and to remove chemical oxygen demand (COD) and total organic carbon (TOC) with removal efficiencies more than 95{\%} and 90{\%}, respectively. Kinetic experiments have demonstrated that TOC removal rate followed pseudo-second order kinetics. Rate constants of 1.12×10 -3 A-1 min-1 and 2×10-5 L mg-1 min-1 were calculated for UV absorbance at 277 nm and TOC decay, respectively. These results indicate that the mechanism of pharmaceuticals degradation involves two main steps: (i) Rapid degradation of aromatic compounds by hydroxylation followed by oxidative opening of benzene rings to form aliphatic derivatives and (ii) subsequent slow fragmentation of aliphatic derivatives into small carboxylic acids which are mineralized into CO2, H2O and other inorganic ions during the final steps of degradation.",
keywords = "Degradation, Hydroxyl radicals, Pharmaceuticals, Photochemistry, Pollution, Remediation",
author = "Ahmed Bedoui and Khaled Elsaid and Nasr Bensalah and Ahmed Abdel-Wahab",
year = "2011",
month = "7",
day = "1",
language = "English",
volume = "14",
pages = "226--234",
journal = "Journal of Advanced Oxidation Technologies",
issn = "1203-8407",
publisher = "J.AOTs Science Tecnology Network Inc.",
number = "2",

}

TY - JOUR

T1 - Treatment of pharmaceutical-manufacturing wastewaters by UV irradiation/hydrogen peroxide process

AU - Bedoui, Ahmed

AU - Elsaid, Khaled

AU - Bensalah, Nasr

AU - Abdel-Wahab, Ahmed

PY - 2011/7/1

Y1 - 2011/7/1

N2 - In this study, the treatment of pharmaceutical-manufacturing wastewaters (PMWW) by advanced chemical oxidation using UV irradiation/hydrogen peroxide (H2O2) process has been investigated. Effects of experimental conditions such as H2O2 dose, initial organic matter concentration, temperature and initial pH value on the removal efficiency and kinetics of organic matter were investigated. Results of this study indicated that UV/H 2O2 process can be successfully used to completely destroy aromatic compounds, and to remove chemical oxygen demand (COD) and total organic carbon (TOC) with removal efficiencies more than 95% and 90%, respectively. Kinetic experiments have demonstrated that TOC removal rate followed pseudo-second order kinetics. Rate constants of 1.12×10 -3 A-1 min-1 and 2×10-5 L mg-1 min-1 were calculated for UV absorbance at 277 nm and TOC decay, respectively. These results indicate that the mechanism of pharmaceuticals degradation involves two main steps: (i) Rapid degradation of aromatic compounds by hydroxylation followed by oxidative opening of benzene rings to form aliphatic derivatives and (ii) subsequent slow fragmentation of aliphatic derivatives into small carboxylic acids which are mineralized into CO2, H2O and other inorganic ions during the final steps of degradation.

AB - In this study, the treatment of pharmaceutical-manufacturing wastewaters (PMWW) by advanced chemical oxidation using UV irradiation/hydrogen peroxide (H2O2) process has been investigated. Effects of experimental conditions such as H2O2 dose, initial organic matter concentration, temperature and initial pH value on the removal efficiency and kinetics of organic matter were investigated. Results of this study indicated that UV/H 2O2 process can be successfully used to completely destroy aromatic compounds, and to remove chemical oxygen demand (COD) and total organic carbon (TOC) with removal efficiencies more than 95% and 90%, respectively. Kinetic experiments have demonstrated that TOC removal rate followed pseudo-second order kinetics. Rate constants of 1.12×10 -3 A-1 min-1 and 2×10-5 L mg-1 min-1 were calculated for UV absorbance at 277 nm and TOC decay, respectively. These results indicate that the mechanism of pharmaceuticals degradation involves two main steps: (i) Rapid degradation of aromatic compounds by hydroxylation followed by oxidative opening of benzene rings to form aliphatic derivatives and (ii) subsequent slow fragmentation of aliphatic derivatives into small carboxylic acids which are mineralized into CO2, H2O and other inorganic ions during the final steps of degradation.

KW - Degradation

KW - Hydroxyl radicals

KW - Pharmaceuticals

KW - Photochemistry

KW - Pollution

KW - Remediation

UR - http://www.scopus.com/inward/record.url?scp=79960815935&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79960815935&partnerID=8YFLogxK

M3 - Article

VL - 14

SP - 226

EP - 234

JO - Journal of Advanced Oxidation Technologies

JF - Journal of Advanced Oxidation Technologies

SN - 1203-8407

IS - 2

ER -