The effects of combined ozonation and filtration on disinfection by-product formation

Karnik, Bhavana S.; Davies, Simon H.; Baumann, Melissa J.; Masten, Susan J.

doi:10.1016/j.watres.2005.04.073

Cited by 128 publications

(54 citation statements)

References 28 publications

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“…The average value for raw samples was 77.64 mg/L, meanwhile for chlorination treatments with 5, 10, 25, and 50 ppm of chlorine was 39.02, 42.46, 42.85, and 45.81 mg/L, respectively, all of them below the minimum value of not-processed wastewater samples: 60.85 mg/L. This fact can be explained by a mineralization, i.e., an important degradation of the carbon compounds to form water and carbon dioxide that will be emitted to the atmosphere, as previously reported both for water ozonation [7] and in chlorinated swimming pool water [8].…”

Section: Statistical Analysessupporting

confidence: 66%

Toxicity assessment of chlorinated secondary effluents by theVibrio fischeribioluminescence assay

Bayo

Angosto

Gómez-López

et al. 2009

Environmental Health Risk V

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The objective of this manuscript was to assess the toxicity formation on biological treated wastewater from a municipal wastewater treatment plant, after a chlorination-dechlorination disinfection process. Water was monitored by means of physicochemical and ecotoxicological parameters, with the use of Vibrio fischeri bioassay. Since a dechlorination process removed residual chlorine, the positive correlation between toxicity values and chlorine concentrations suggested the formation of toxic disinfection by-products (DBPs). Statistically significant differences could be observed for toxicity values according to total carbon, total inorganic carbon, total nitrogen, chlorine, and pH. However, total organic carbon, chemical oxygen demand, electrical conductivity and turbidity had no statistical significance on toxicity formation. Three second-order polynomial equations were fitted between with total carbon and total nitrogen concentrations as independent variables, and EC50 as a dependent one.

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Section: Statistical Analysessupporting

confidence: 66%

Toxicity assessment of chlorinated secondary effluents by theVibrio fischeribioluminescence assay

Bayo

Angosto

Gómez-López

et al. 2009

Environmental Health Risk V

View full text Add to dashboard Cite

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“…With the introduction of disinfection processes (mainly using chlorine), waterborne infectious diseases have been significantly reduced. However, it is known that the application of disinfection agents such as chlorine, chlorine dioxide or ozone is associated with the formation of disinfection by-products (e.g., trihalomethanes, halophenols, ketones, aldehydes) with a high mutagenic and/or carcinogenic potential [1][2][3][4]. Chlorination also affects the taste and odor of drinking water.…”

Section: Introductionmentioning

confidence: 99%

The role of nanomaterials as effective adsorbents and their applications in wastewater treatment

et al. 2017

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Nanomaterials have been extensively studied for heavy metal ions and dye removals from wastewater. This article reviews the role of nanomaterials as effective adsorbents for wastewater purification. In recent years, numerous novel nanomaterial adsorbents have been developed for enhancing the efficiency and adsorption capacities of removing contaminants from wastewater. The innovation, forthcoming development, and challenges of cost-effective and environmentally acceptable nanomaterials for water purification are discussed and reviewed in this article. This review concludes that nanomaterials have many unique morphological and structural properties that qualify them to be used as effective adsorbents to solve several environmental problems. Graphical Abstract& Hamidreza Sadegh

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“…When ozonation is used in combination with membrane filtration, as was accomplished in this hybrid system, fouling can be controlled (Karnik et al, 2005b) and the formation of disinfection by-products after chlorination can be reduced (Karnik et al, 2005a). In very soft waters, the combined use of ozonation and ceramic membrane may lead to significant decreases in BrO 3 -levels in the product water; however, in most natural waters, the Ca 2 + levels would be high enough such that the rejection of both BrO 3 -and Br -by the membrane would be extremely small.…”

Section: Discussionmentioning

confidence: 99%

Rejection of Bromide and Bromate Ions by a Ceramic Membrane

Moslemi

Davies

Masten

2012

Environmental Engineering Science

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Effects of pH and the addition of calcium chloride (CaCl 2 ) on bromate (BrO 3 -) and bromide (Br -) rejection by a ceramic membrane were investigated. Rejection of both ions increased with pH. At pH 8, the rejection of BrO 3 -and Br -was 68% and 63%, respectively. Donnan exclusion appears to play an important role in determining rejection of BrO 3 -and Br -. In the presence of CaCl 2 , rejection of BrO 3 -and Br -ions was greatly reduced, confirming the importance of electrostatic interactions in determining rejection of BrO 3 -and Br -. The effect of Ca 2 + is so pronounced that in most natural waters, rejection of both BrO 3 -and Br -by the membrane would be extremely small.

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The effects of combined ozonation and filtration on disinfection by-product formation

Cited by 128 publications

References 28 publications

Toxicity assessment of chlorinated secondary effluents by theVibrio fischeribioluminescence assay

Toxicity assessment of chlorinated secondary effluents by theVibrio fischeribioluminescence assay

The role of nanomaterials as effective adsorbents and their applications in wastewater treatment

Rejection of Bromide and Bromate Ions by a Ceramic Membrane

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