Organic micropollutants (OMPs) oxidation by ozone: Effect of activated carbon on toxicity abatement

Rozas, Oscar; Baeza, Carolina; Núñez, Katherine; Rossner, Alfred; Urrutia, Roberto; Mansilla, Héctor D.

doi:10.1016/j.scitotenv.2016.12.120

Cited by 49 publications

(23 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second explanation for the stronger decrease in TOC when bpAC is added is an oxidation of the molecules by the radical route. Indeed, it is known that molecular ozone can generate free radicals in contact with solids such as activated carbon [14][15][16]. As these species are much more reactive than ozone and non-selective, they are able to attack compounds refractory to molecular ozone.…”

Section: Oxidation Of 24-dmp: Single and Catalytic Ozonationmentioning

confidence: 99%

“…Nervertheless, oxidation processes with ozone can be improved by adding an adsorbent in the process. Several studies have dealt with the interest of catalytic ozonation in presence of zeolite or activated carbon (AC) for the last two decades [9][10][11][12][13][14][15][16][17][18]. This coupling generates the production of non-selective radicals such as hydroxyl radicals which have a higher oxidation potential than molecular ozone.…”

Section: Introductionmentioning

confidence: 99%

“…This coupling generates the production of non-selective radicals such as hydroxyl radicals which have a higher oxidation potential than molecular ozone. The heterogeneous catalytic ozonation in the presence of activated carbon was reported to be more efficient than molecular ozonation particularly for the treatment of effluents containing compounds with low biodegradability [9,[14][15][16][17]19]. In all these papers, the reaction kinetics was enhanced due to the decomposition of ozone on the surface of the activated carbon into powerful non-selective free radicals: HO • and O 2 -• .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low-cost activated carbon for adsorption and heterogeneous ozonation of phenolic wastewater

Konan¹,

Richard²,

Andriantsiferana³

et al. 2019

Desalination and Water Treatment

View full text Add to dashboard Cite

Section: Oxidation Of 24-dmp: Single and Catalytic Ozonationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low-cost activated carbon for adsorption and heterogeneous ozonation of phenolic wastewater

Konan¹,

Richard²,

Andriantsiferana³

et al. 2019

Desalination and Water Treatment

View full text Add to dashboard Cite

“…The result shows that the combination method generated more hydroxyl radicals compared with single ozonation and single adsorption, which further enhances the ability of phenol degradation in solution. Rozas et al [14], studied the removal of organic micropollutants (OMPs) by ozone and the combination of ozone and powdered activated carbon. The addition of PAC slightly increases the oxidation rate of OMPs mixture in natural water.…”

Section: Introductionmentioning

confidence: 99%

Combination of Ozonation and Adsorption Using Granular Activated Carbon (GAC) for Tofu Industry Wastewater Treatment

Karamah¹,

Adripratiwi²,

Anindita³

2018

Indones. J. Chem.

View full text Add to dashboard Cite

Tofu industry wastewater is one of the environmental pollutants that need more effective treatment. Ozonation and adsorption method is known to have the capability to oxidize organic compound in wastewater. Adsorption is done by using Granular Activated Carbon (GAC) as an adsorbent to increase tofu wastewater degradation process by adsorbing organic materials and increasing production of hydroxyl radical as the main oxidizing agent. This research is carried out to evaluate the performance of ozonation, adsorption, and combination of both in processing tofu wastewater. To evaluate the significance of ozone dosage and amount of GAC used, these variations are varied which are 60, 111, and 155 mg/h of ozone dosage and 50, 75, and 100 g of the amount of GAC used. Parameters of the process are organic substances of tofu wastewater such as Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), and pH. The measurements are being done using a spectrophotometer, colorimeter, and pH meter. The outcome of this research is to provide an alternative method in the liquid waste treatment of the tofu industry and the processed wastewater to meet the environmental quality standards. The more ozone and the more quantity of GAC used, the higher the quantity of hydroxyl radicals formed. Addition of GAC in the ozonation process results in more than 100% increase in hydroxyl radical production. Combination of ozonation and adsorption is able to remove 377.12 mg/L of COD and 26 mg/L of TSS. ABSTRAKLimbah cair industri tahu merupakan salah satu pencemar lingkungan yang membutuhkan proses pengolahan yang lebih efektif. Metode ozonasi dan adsorpsi telah diketahui dapat mengoksidasi senyawa organik di dalam air. Proses adsorpsi dilakukan dengan menggunakan Granular Activated Carbon (GAC) sebagai adsorben untuk meningkatkan efektivitas proses degradasi limbah cair tahu dengan cara mengadsorpsi material organik dan meningkatkan produksi radikal hidroksil, agen oksidator utama. Penelitian ini dilakukan untuk mengevaluasi performa ozonasi, adosrpsi, dan kombinasi keduanya dalam degradasi limbah cair tahu. Untuk mengevaluasi seberapa signifikan pengaruh dosis ozon dan jumlah GAC yang digunakan, kedua parameter ini divariasikan yaitu menggunakan 60, 111, and 155 mg/jam ozon dan 50, 75, dan 100 g GAC yang digunakan. Paramater dari penelitian ini adalah jumlah senyawa organik dalam bentuk Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), dan pH di dalam limbah cair tahu. Pengukuran parameter-parameter ini menggunakan spektrofotometer, kolorimeter, dan pH meter. Luaran dari penelitian ini diharapkan dapat memberikan metode alternative dalam pengolahan limbah cair industri tahu agar dapat memenuhi standar baku mutu lingkungan. Makin banyak ozon dan GAC yang digunakan, makin besar jumlah radikal OH yang dihasilkan. Penambahan GAC pada proses ozonasi meningkatkan jumlah radikal OH yang dihasilkan hingga lebih dari 100%. Kombinasi ozonasi dan adsorpsi dapat menurunkan COD hingga 377,12 mg/L dan TSS 26 mg/L.

show abstract

“…Ambient (outdoor air pollution) in both cities and rural areas was estimated to cause 3 million premature deaths worldwide in 2012 [3]. In order to address this issue, many researches have been conducted such as the used of ozonation [4] ,bio-monitoring [5] advanced oxidation process (AOP) and others. Among these, AOP is an environmental friendly technology for air purification as it can degrade and recalcitrant organic compounds into harmless materials.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Methyl Orange Using N-TiO2 Synthesized via Hydrothermal Treatment

Ibrahim¹,

Jasni²,

Ainuddin³

et al. 2018

IJCRSET

View full text Add to dashboard Cite

In th is work, urea (0.1 to 1.7 wt.%) is incorporated with TiO2 using hydrothermal treatment for 3 hours at temperatures of 180°C. The influence of urea content on the crystalline TiO2 and their photocatalytic activity are investigated. The samples are characterized by using X-ray diffraction (XRD), energy dispersive Xray (EDX), field emission scanning electron microscope (FESEM) and UV-Visible spectroscopy (UV-Vis). XRD results indicate that all samples are anatase phase while FESEM images shows agglomeration with average grain size approximately of 30 to 46 nm. The photocatalytic activity shows that TiO2 with 0.5 wt.% of urea give the highest performance with 67% degradation after 4 hours visible light irradiation.

show abstract

Organic micropollutants (OMPs) oxidation by ozone: Effect of activated carbon on toxicity abatement

Cited by 49 publications

References 68 publications

Low-cost activated carbon for adsorption and heterogeneous ozonation of phenolic wastewater

Low-cost activated carbon for adsorption and heterogeneous ozonation of phenolic wastewater

Combination of Ozonation and Adsorption Using Granular Activated Carbon (GAC) for Tofu Industry Wastewater Treatment

Degradation of Methyl Orange Using N-TiO2 Synthesized via Hydrothermal Treatment

Contact Info

Product

Resources

About