Nitroaromatic Hydrocarbon Ozonation in Water. 1. Single Ozonation

Beltrán, Fernando J.; Martín, Juan Vicente González; Alonso, María Teresa

doi:10.1021/ie9704253

Cited by 89 publications

(74 citation statements)

References 24 publications

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“…In this treatment combination, the supplied UV energy interacts with O 3 as described in the following reaction (Beltrán et al 1998;Esplugas et al 2002;Guittonneau et al 1990):…”

Section: Ozone/uvmentioning

confidence: 99%

The application of advanced oxidation technologies to the treatment of effluents from the pulp and paper industry: a review

Hermosilla

Merayo

Gascó

et al. 2014

Environ Sci Pollut Res

159

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Paper industry is adopting zero liquid effluent technologies to reduce fresh water use and meet environmental regulations, which implies water circuits closure and the progressive accumulation of pollutants that must be removed before water re-use and final wastewater discharge. The traditional water treatment technologies that are used in paper mills (such as dissolve air flotation or biological treatment) are not able to remove recalcitrant contaminants. Therefore, advanced water treatment technologies, such as advanced oxidation processes (AOPs), are being included in industrial wastewater treatment chains aiming to either improve water biodegradability or its final quality. A deep review of the current state of the art regarding the use of AOPs for the treatment of the organic load of effluents from the paper industry is herein addressed considering mature and emerging treatments for a sustainable water use in this sector. Wastewater composition, which is highly dependent of the raw materials being used in the mills, the selected AOP itself, and its combination with other technologies, will determine the viability of the treatment. In general, all AOPs have been reported to achieve good organics removal efficiencies (COD removal >40%; and about an extra 20% if AOPs are combined with biological stages). Particularly, ozonation has been the most extensively reported and successfully implemented AOP at an industrial scale for effluent treatment or reuse within pulp and paper mills; although Fenton processes (photo-Fenton particularly) have actually addressed better oxidative results (COD removal ≈65-75%) at lab scale, but still need further development at large scale.

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“…In this treatment combination, the supplied UV energy interacts with O 3 as described in the following reaction (Beltrán et al 1998;Esplugas et al 2002;Guittonneau et al 1990):…”

Section: Ozone/uvmentioning

confidence: 99%

The application of advanced oxidation technologies to the treatment of effluents from the pulp and paper industry: a review

Hermosilla

Merayo

Gascó

et al. 2014

Environ Sci Pollut Res

159

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“…6). It is well known that the oxidizing ability of ozone comes from molecular either Ozone or hydroxyl free radicals (Beltran et al, 1998). Eq.…”

Section: Rate Constants For the Degradation Of 4c2np At Different Phsmentioning

confidence: 99%

“…Nitroaromatic compounds are used in many industrial processes, including the preparation of pesticides, explosives, textiles and paper. Therefore, these compounds are often detected as water pollutants as a result of their release in industrial effluents (Beltran et al, 1998;Sarasa et al, 1998). If these effluents are discharged into water without proper treatment, they are hazardous to humans and the environment (Song et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Degradation of trace aqueous 4-chloro-2-nitrophenol occurring in pharmaceutical industrial wastewater by ozone

Gharbani

Khosravi

Tabatabaii

et al. 2010

Int. J. Environ. Sci. Technol.

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ABSTRACT:Degradation of 4-chloro-2-nitro phenol by ozonation in aqueous solution was studied in a semi batch reactor under constant ozone dosage and variable pH conditions. The effectiveness of the process was estimated based on the degree of conversion of 4-chloro-2-nitro phenol. It was observed that ozonation is more effective at alkaline reaction of medium than other conditions. The degree of conversion achieved (at the first 5 minutes of the process)at pH 9 was 99.64% compared to 99.03% and 77.35% at pH 7 and 3, respectively. Another parameter used to quantify the 4-chloro-2-nitrophenol during ozonation was the pseudo first order rate constant k [min -1 ]. Results showed that the rate constant of the process was approximately much higher at the alkaline pH compared to acidic ones. A considerable improvement in chemical oxygen demand removal was observed at pH above 7. At pH 9, the reduction in chemical oxygen demand at the end of the process reached 56.9 %. The degree of organically bounded nitrogen conversion to nitrate was higher at pH 3. Of the total organic carbon reduction, 15.89 % was observed at pH 9. The 4-chloro-2-nitro phenol degradation intermediate products were analyzed by mass-spectrometry. The main intermediate product was chlorophenol.

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“…There were still residual 2-ClNB and 4-ClNB in the solution, at concentrations of 2.37 and 0.45 mg/L, respectively, even after 120 min of reaction time. The removal rates of major pollutants were in the order of 2-ClA>4-NP>>4-ClNB>2-ClNB, with respective reaction rate constants of 20.22 mg/(L·min), 3.73 mg/(L·min), 0.0287 min −1 , and 0.0215 min −1 , which can be understood by the different reaction mechanisms; that is, the majority of 4-ClNB and 2-ClNB removal is due to hydroxyl radical oxidation whereas 4-NP and 2-ClA are very reactive towards both ozone and hydroxyl radicals (Beltrán et al, 1998;Li et al, 2009). Interestingly, it can also be seen in Fig.…”

Section: Catalytic Ozonation Of Industrial Wastewater Containing Cnacsmentioning

confidence: 99%

Catalytic ozonation-biological coupled processes for the treatment of industrial wastewater containing refractory chlorinated nitroaromatic compounds

Bing-zhi

Zhu

2010

J. Zhejiang Univ. Sci. B

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Abstract:A treatability study of industrial wastewater containing chlorinated nitroaromatic compounds (CNACs) by a catalytic ozonation process (COP) with a modified Mn/Co ceramic catalyst and an aerobic sequencing batch reactor (SBR) was investigated. A preliminary attempt to treat the diluted wastewater with a single SBR resulted in ineffective removal of the color, ammonia, total organic carbon (TOC) and chemical oxygen demand (COD). Next, COP was applied as a pretreatment in order to obtain a bio-compatible wastewater for SBR treatment in a second step. The effectiveness of the COP pretreatment was assessed by evaluating wastewater biodegradability enhancement (the ratio of biology oxygen demand after 5 d (BOD 5 ) to COD), as well as monitoring the evolution of TOC, carbon oxidation state (COS), average oxidation state (AOS), color, and major pollutant concentrations with reaction time. In the COP, the catalyst preserved its catalytic properties even after 70 reuse cycles, exhibiting good durability and stability. The performance of SBR to treat COP effluent was also examined. At an organic loading rate of 2.0 kg COD/(m 3 ·d), with hydraulic retention time (HRT)=10 h and temperature (30±2) °C, the average removal efficiencies of NH 3 -N, COD, BOD 5 , TOC, and color in a coupled COP/SBR process were about 80%, 95.8%, 93.8%, 97.6% and 99.3%, respectively, with average effluent concentrations of 10 mg/L, 128 mg/L, 27.5 mg/L, 25.0 mg/L, and 20 multiples, respectively, which were all consistent with the national standards for secondary discharge of industrial wastewater into a public sewerage system (GB 8978-1996). The results indicated that the coupling of COP with a biological process was proved to be a technically and economically effective method for treating industrial wastewater containing recalcitrant CNACs.

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Nitroaromatic Hydrocarbon Ozonation in Water. 1. Single Ozonation

Cited by 89 publications

References 24 publications

The application of advanced oxidation technologies to the treatment of effluents from the pulp and paper industry: a review

The application of advanced oxidation technologies to the treatment of effluents from the pulp and paper industry: a review

Degradation of trace aqueous 4-chloro-2-nitrophenol occurring in pharmaceutical industrial wastewater by ozone

Catalytic ozonation-biological coupled processes for the treatment of industrial wastewater containing refractory chlorinated nitroaromatic compounds

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