Treatment of acid violet 7 dye containing effluent using the hybrid approach based on hydrodynamic cavitation

Lakshmi, N.J.; Gogate, Parag R.; Pandit, Aniruddha B.

doi:10.1016/j.psep.2021.07.023

Cited by 27 publications

(3 citation statements)

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“…The Fenton based pretreatment has maximum catalytic activity in the acidic pH range from 2.5 to 3.5 [27] . During the Fenton based treatment, FeSO 4 release Fe(II) ions, which, when combined with the optimum quantity of H 2 O 2 aids the generation of highly reactive ˙ OH radicals instantaneously under acidic conditions [13] . The ferric hydroxo complex formed during the process is also effectively broken down by the cavitating effects leading to a further increase in the generation of hydroxyl radicals, and also might be responsible for the subsequent coagulation of chemicals.…”

Section: Resultsmentioning

confidence: 99%

“…A COD digester procured from Hanna Equipment Pvt Ltd., Mumbai, India was used to perform COD analysis. The final COD values were calculated by titrating the digested samples against freshly prepared ferrous ammonium solution of 0.3 N concentration [13] and using the calculation steps described in earlier work [21] . The total dissolved solids (TDS) present in samples were measured by means of TDS meter (model-254312-A01) procured from Thermo Scientific Ltd., India.…”

Section: Methodsmentioning

confidence: 99%

“…Cavitation can be considered an effective option for the pretreatment of BO as it comprises the generation of highly reactive OH . radicals which attack the complex organic pollutants in the effluent with a non-selective nature and subsequently break them into harmless compounds under an optimized operation [11] , [12] , [13] . Acoustic cavitation results in degradation of organic compounds in wastewater through the formation of reactive hydroxyl radicals (•OH) during bubble collapse.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Acoustic cavitation for the process intensification of biological oxidation of CETP effluent containing mainly pharmaceutical compounds: Understanding into effect of parameters and toxicity analysis

Lakshmi

Gogate

Pandit

2023

Ultrasonics Sonochemistry

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acoustic cavitation for the process intensification of biological oxidation of CETP effluent containing mainly pharmaceutical compounds: Understanding into effect of parameters and toxicity analysis

Lakshmi

Gogate

Pandit

2023

Ultrasonics Sonochemistry

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Treatment of wastewater containing ciprofloxacin using the hybrid treatment approach based on acoustic cavitation

Lakshmi,

Iyer,

Gogate

2024

Can J Chem Eng

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The present work investigates the treatment of wastewater containing an antibiotic, ciprofloxacin (CIP), using acoustic cavitation (AC) coupled with other advanced oxidation processes (AOPs). For the laboratory scale degradation study, operating parameters like drug concentration, operating pH, and initial temperature were initially optimized and then used in hybrid approach of AC in combination with AOPs. At 15 m/L initial drug concentration, neutral pH of 7, and ambient temperature of 30°C, optimum CIP degradation of 13.66% was obtained within 120 min of operation. The intensification of the AC‐based approach was subsequently achieved using other oxidants like H2O2, potassium persulphate (KPS), and O3. The combination of AC with H2O2 and KPS resulted in 44.30% and 35.41% CIP degradation, respectively, while AC combined with ozone resulted in almost complete degradation of CIP within 90 min of treatment with a maximum cavitational yield of 4.761 × 10−6 mg/J. The cost estimation for the optimized treatment approaches revealed that AC combined with ozone is the best process for degradation with the least operational cost of 8.7 Rs/L (105 US $/m3). Complete degradation of CIP with AC + O3 based approach at much lower costs opens a window for implementation in the pharmaceutical industries.

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Quantification of phenol degradation using hydrodynamic cavitation‐based packed bed reactor based on glass balls

Mohod,

Clemente,

Klanovicz

et al. 2024

Environmental Quality Mgmt

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The current study presents a novel and effective cavitation technique for the degradation of phenol using a hydrodynamic cavitation‐based packed bed reactor (HCPBR). Several operational parameters, including fluid velocity, hydrogen peroxide (H2O2) generation (18.06 μM of H2O2 in 60 min), and initial phenol concentration, have been studied using a HCPBR. The effective parameters for phenol degradation were found to be a fluid velocity of 85.15 m/s and an initial phenol concentration of 20 ppm. It was also noted that the presence of a glass marble‐bed (15.35%) in the cavitation reactor exhibits a substantial effect on the degradation of phenol compared to the absence of a glass marble‐bed (2.91%). The investigation also examined the effect of combining hydrodynamic cavitation with chemical oxidation processes, specifically H2O2, persulfate (Na2S2O8 and K2S2O8), and titanium dioxide, on the extent of phenol degradation. Persulfate was shown to have a significant effect on phenol degradation at 1 g/L. To clarify if free radical attack is the driving force behind degradation, the impact of radical scavengers such as n‐butanol has also been examined. Toxicological assessments revealed that, for lentil meristematic cells, the therapy was quite cytotoxic, but it needs to be improved to eliminate its genotoxic side effects. Overall, the experiment clearly demonstrated the effectiveness of the HCPBR for phenol degradation.

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Treatment of acid violet 7 dye containing effluent using the hybrid approach based on hydrodynamic cavitation

Cited by 27 publications

References 50 publications

Acoustic cavitation for the process intensification of biological oxidation of CETP effluent containing mainly pharmaceutical compounds: Understanding into effect of parameters and toxicity analysis

Acoustic cavitation for the process intensification of biological oxidation of CETP effluent containing mainly pharmaceutical compounds: Understanding into effect of parameters and toxicity analysis

Treatment of wastewater containing ciprofloxacin using the hybrid treatment approach based on acoustic cavitation

Quantification of phenol degradation using hydrodynamic cavitation‐based packed bed reactor based on glass balls

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