Dye decomposition by combined ozonation and anaerobic treatment: Cost effective technology

Venkatesh, Smita; Venkatesh, Kumar; Quaff, A. R.

doi:10.1016/j.jart.2017.02.006

Cited by 96 publications

(22 citation statements)

References 24 publications

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“…Similar to this study, enzymes have been used for color removal in the current literature [12,20,26]. It was stated by Venkatesh et al [35] that organic acids are formed as a result of degradation of dyes by ozone. A reaction of Reactive Black 5 and ozone results in formation of short chain organic acids [21].…”

Section: Resultsmentioning

confidence: 56%

“…It was found that the BOD 5 /COD ratio of the Reactive Black 5 increased in parallel with color removal. The oxidation of dye molecules with ozone will oxidize the double bonds of the chromophore group [35]. Enzyme use increased color removal efficiency at all wavelengths.…”

Section: Resultsmentioning

confidence: 99%

“…By ozonation, the amines in the composition of the dye (NH 2 ) are converted into nitrate. Sulfonic groups are turned into sulfate [35]. It has been shown in the literature that biodegradation of wastewater may be maximized with pretreatment doses in the range of 0.23-1.04 mg O 3 / mgCOD [2].…”

Section: Introductionmentioning

confidence: 99%

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Increasing BOD5/COD ratio of non-biodegradable compound (reactive black 5) with ozone and catalase enzyme combination

Dinçer

2020

SN Appl. Sci.

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The effect of ozone and ozone plus a biological catalyst (catalase) on the degradation processes of Reactive Black 5 was investigated. The ozonation process was carried out in a laboratory-scale batch reactor with a volume of 500 ml. Chemical oxygen demand (COD), pH, color removal and the BOD 5 /COD ratio were measured during the process. At the first stage, only ozonation was performed, at the second stage, ozonation plus NaCl and Na 2 CO 3 , and at the third stage, ozonation plus catalase enzyme were used. As a result of the oxidation of Reactive Black 5 with only ozone and ozone plus textile auxiliaries, chemical oxygen demand (COD) removal was 34% and 19%, respectively. COD removal efficiency was 43% when 10 ml of catalase was added to the ozone reactor. Carbonate and salt have a negative effect on the oxidation of reactive Black 5 with ozone. Reactive Black 5 was degraded into sub-components, and the biodegradability of the wastewater increased. The pH value decreased from 3.3 down to 1.6, which showed that organic acids were formed as a result of degradation. The use of enzymes in combination with ozonation shows that Reactive Black5 can rapidly convert into the intermediate within the 270-min ozonation time (BOD 5 /COD = 0.46). COD removal was not as high as color removal efficiency. This may have resulted from the formation of colorless oxidation products. The significant increase in biodegradability after ozonation in the presence of the catalyst may also be seen as a reduction of toxic intermediates.

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Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 99%

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Increasing BOD5/COD ratio of non-biodegradable compound (reactive black 5) with ozone and catalase enzyme combination

Dinçer

2020

SN Appl. Sci.

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“…To reduce the harmful impact of water polluted with chemical colorants, various treatment processes were commonly applied by the industries. These treatments included the coagulation-flocculation, bioprocess, membrane filtration, advanced oxidation and adsorption (Venkatesh et al 2017, Robinson et al 2000. Recently, the adsorption technique is frequently used and many researches were done in order to select a new suitable material useful as absorbent.…”

Section: Dye Removalmentioning

confidence: 99%

Cactus material-based adsorbents for the removal of heavy metals and dyes: a review

Amari

Alalwan

Eldirderi

et al. 2019

Mater. Res. Express

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Cactus is cultivated in many regions over the world. Because of its chemical composition and its valuable nutritional and biological characteristics, cactus finds applications in different sectors such as the pharmaceutical and the food industries. Interestingly, cactus materials (cladodes, fruit seeds, peel, etc) have been explored for their probable use as adsorbents for the removal of toxic heavy metals and dyes from wastewater. Various preparations methods were used to produce cactus material-based biosorbents. These biosrbents have been investigated and successfully used for the elimination of both heavy metal and dyes from aqueous solutions. Related results showed very promising pollutant removal efficiency associated with an interesting adsorption capacity similar to other materials from various origins. This paper explores various cactus biosorbents preparations. Furthermore, their efficiency in depollution and factors controlling the adsorption capacity will be discussed.

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“…Due to the solubility of reactive dyes in water, it is very difficult to remove them by coagulation and biological decomposition (4). Different methods including advanced oxidation (5), reverse osmosis (6), electrochemical method (7), ozonation (8), and biological methods such as the use of fungi and bacteria (9) have been used for dye removal. Each of these methods has some advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Reactive Blue 203 dye Removal Using Biosorbent: A Study of Isotherms, Kinetics, and Thermodynamics

Bagheri

Nasiri

Bahrami³

2018

Avicenna J Environ Health Eng

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Nowadays, due to increasing usage of dye in various industries and its destructive effects on health and environment, it is necessary to remove dyes from industrial wastes. Although few studies can be found on using pine cone for removal of different dyes, it has not been used yet to remove Reactive Blue 203 (RB203) dye. The purpose of this study is to investigate RB203 dye adsorption using activated carbon produced from pine cone. Optimal values of influencing factors for RB203 dye removal were obtained. The results showed that the maximum removal was occurred at a pH of 2, temperature of 30˚C, dye concentration of 30 mg/L, adsorbent dosage of 100 mg/L, and contact time of 15 min. The maximum removal percentage was 98.48%. In order to study the synthesized activated carbon, some characterization methods including scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR) spectroscopy and Brunauer-Emmett-Teller (BET) have been used. Investigation of adsorption isotherm models revealed that adsorption of RB203dye can be described through D-R and Temkin isotherm models. Additionally, RB203 dye removal follows the pseudo-firstorder kinetic equation.

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Dye decomposition by combined ozonation and anaerobic treatment: Cost effective technology

Cited by 96 publications

References 24 publications

Increasing BOD5/COD ratio of non-biodegradable compound (reactive black 5) with ozone and catalase enzyme combination

Increasing BOD5/COD ratio of non-biodegradable compound (reactive black 5) with ozone and catalase enzyme combination

Cactus material-based adsorbents for the removal of heavy metals and dyes: a review

Reactive Blue 203 dye Removal Using Biosorbent: A Study of Isotherms, Kinetics, and Thermodynamics

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