Degradation of 2, 4, 6-trinitotoluene in aqueous solution by ozonation and multi-stage ozonation biological treatment

Diwani, G. El; Rafie, Sh. El; Hawash, S.

doi:10.1007/bf03326102

Cited by 20 publications

(7 citation statements)

References 32 publications

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“…H 2 O 2 concentration was determined by the DMP (2, 9-dimethyl-1,10-phenanthroline) method (Kosaka et al, 1998). (Gunten, 2003;Rosenfeldt et al, 2006;Tizaoui et al, 2007;Wu et al, 2007;Bandyopadhyay and Chattopadhyay, 2007;El Diwani et al, 2009). Therefore, these abnormal results could be due to interference by H 2 O 2 since overestimation was not observed during treatment with ozone alone or O 3 /UV.…”

Section: Methodsmentioning

confidence: 99%

Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater

Lee

Kim

et al. 2011

Int. J. Environ. Sci. Technol.

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It is known that hydrogen peroxide interferes with chemical oxygen demand analysis by consuming oxidation agents such as potassium dichromate, thus leading to overestimation of the chemical oxygen demand measurements. The objective of the study was to investigate the effects of hydrogen peroxide interference and to determine true chemical oxygen demand values on interpreting treatment performance during ozone-based advanced oxidation of livestock wastewater in which hydrogen peroxide concentration and chemical oxygen demand values are dynamically changing. According to the chemical oxygen demand monitoring data, chemical oxygen demand values were always higher than the initial chemical oxygen demand load when hydrogen peroxide was involved and the treatment performance with ozone alone or ozone/ultraviolet was better than with coupled hydrogen peroxide. The extent of overestimation was proportional to the remaining hydrogen peroxide concentration and the average overestimation ratio in livestock wastewater was in the range of 0.50~0.58 mg per 1 mg of hydrogen peroxide, depending upon the quality of the wastewater treated. True chemical oxygen demand values were estimated by correlating the extent of overestimation with the remaining hydrogen peroxide concentration during treatment. The extent of overestimation decreased to zero gradually as the amount of hydrogen peroxide also approached zero as oxidation proceeded. The corrected chemical oxygen demand values indicated underlying tendency of oxidation, which could not be seen in the original chemical oxygen demand monitoring data. Application of ozone/hydrogen peroxide was more efficient for reducing chemical oxygen demand than ozone alone, as was ozone/hydrogen peroxide/ultraviolet compared to ozone/ultraviolet. When coupled with ozone, ultraviolet irradiation was more efficient than hydrogen peroxide for decreasing chemical oxygen demand during treatment of livestock wastewater.

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Section: Methodsmentioning

confidence: 99%

Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater

Lee

Kim

et al. 2011

Int. J. Environ. Sci. Technol.

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“…The byproducts of advanced oxidation process have prevented this technique from general application though it is quite effective in removing MTBE (Acero et al, 2001). Granular activated carbon (GAC) adsorption is a widely used technology for treating water contaminated with many taste-and odor-causing organics and synthetic organic chemicals, either independently or coupled with biological degradation (Suffet and Wable, 1995;El Diwani et al, 2009). Some researches have reported that GAC could successfully remove MTBE from contaminated water (Wilhelm et al, 2002;Shih et al, 2003;Sutherland et al, 2004) mainly due to its well developed porous internal structure and large surface area (Yang and Al-Duri, 2005).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of methyl tert-butyl ether using granular activated carbon: Equilibrium and kinetic analysis

Chen

Zhang

Chen

2010

Int. J. Environ. Sci. Technol.

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AB STRACT:The adsorption of methyl tert-butyl ether by granular activated carbon was investigated. The experimental data were analyzed using the Freundlich isotherm and the Langmuir isotherm. Although equilibrium data were found to follow Freundlich isotherm model, it were fitted better by the Langmuir model with a maximum adsorption capacity of 204.1 mg/g. The kinetic data obtained at different concentrations were analyzed to predict the constant rate of adsorption using three common kinetic models: pseudo-first-order, pseudo-second-order equation and intraparticle diffusion equation. The pseudo-second-order model was suitable for describing the adsorption kinetics for the removal of methyl tert-butyl ether from aqueous solution onto granular activated carbon. Both the Lagergren first-order rate constant k 1 and pseudo-second-order rate constant k 2 decrease with increasing initial concentrations of methyl tert-butyl ether and the intraparticle diffusion rate constant k p shows the reverse characteristic. Analysis of sorption data using a boyd plot confirmed that external mass transfer is the main rate-limiting step at the initial stage of adsorption. Results illustrate that granular activated carbon is an effective adsorbent for methyl tert-butyl ether and also provide specific guidance into adsorption of methyl tert-butyl ether on granular activated carbon in contaminated groundwater.

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“…In addition, TNT and its derivatives can persist and accumulate over the long-term in nature and are difficult to biodegrade [1][2][3]. Therefore, biological methods combined with other pre-treatment methods, that are based on common microbiological methods, enzymes methods, or plant methods, have been developed for the treatment of TNTcontaminated wastewater and soil water [1][2][3][4][5][6][7][8][9][10][20][21][22]. Previous studies on TNT biodegradation used microorganisms, such as immobilized white rot fungi (Phanerochaete chrysosporium), for the treatment of TNT wastewater; biological aerated filters (BAF), anaerobic filters (AF), and anaerobic-anoxic-oxic moving bed biological reactors (A2O-MBBR) are commonly applied to wastewater treatment containing TNT in the next stage [1][2][3][4][5] after the wastewater has been pre-treated by physical or chemical methods.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Wastewater Containing Aromatic Nitro Compounds Using the A2o-MBBR Method

Nhan

Tú

Nhàn

et al. 2018

IVUZKKT

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2,4,6-Trinitrotoluene (TNT) is widely used in explosives production. Since it is toxic and mutagenic to humans and animals, decontamination of TNT wastewater is necessary. Wastewater, containing TNT, from four factories in Vietnam producing industrial explosives were collected. The samples had different characteristics and varied widely, especially in terms of TNT concentration, depending on the technology and production management method at each plant. The TNT concentration ranged from 25 to 128 mg/l, chemical oxygen demand (COD) ranged from 128 to 650 mg/l, BOD5 ranged from 28 to 67 mg/l, NH4+ranged from 23 to 325 mg/l, T-P ranged from 0.13 to 0.38, and pH ranged from 6.5 to 8.2. In Vietnam, removal of TNT is carried out using granular activated carbon adsorption and an incineration method. This method is expensive and generates secondary pollution. To overcome these drawbacks, the combination of an anaerobic-anoxic-oxic and moving bed biofilm reactor (A2O-MBBR) for treating TNT wastewater was investigated in this study. Reaction tanks of the A2O-MBBR system were supplemented with activated sludges, from a wastewater treatment station in Chemical and Electrical Engineering Company 15, containing biological preparations of nitrifying and denitrifying bacteria. The results showed that after 30 days under operating conditions of COD of 200-250 mg/l, MSLL of 1800-3000 mg/l, and DO of 5 mg/l, COD removal efficiency reached approximately 70-83%, the TNT concentration decreased by 91-99.7% (to approximately 0.5- 2 mg/l), and the ammonium concentration fell to 15-17 mg/l (reaching 42.8–66% removal efficiency after 24 h of treatment). For citation: Nhan Vu Duy, Tu Nguyen Van, Nhan Nguyen Thi, Huong Le Mai, Tsarev Yu.V., Huong Le Thi Mai Treatment of wastewater containing aromatic nitro compounds using the A2O-MBBR method. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 9-10. P. 113-119

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Degradation of 2, 4, 6-trinitotoluene in aqueous solution by ozonation and multi-stage ozonation biological treatment

Cited by 20 publications

References 32 publications

Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater

Hydrogen peroxide interference in chemical oxygen demand during ozone based advanced oxidation of anaerobically digested livestock wastewater

Adsorption of methyl tert-butyl ether using granular activated carbon: Equilibrium and kinetic analysis

Treatment of Wastewater Containing Aromatic Nitro Compounds Using the A2o-MBBR Method

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