1
|
Jadhav SP, Ayare SD, Gogate PR. Intensified degradation of tartrazine dye present in effluent using ultrasound combined with ultraviolet irradiation and oxidants. Environ Monit Assess 2024; 196:431. [PMID: 38580863 DOI: 10.1007/s10661-024-12561-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 03/23/2024] [Indexed: 04/07/2024]
Abstract
Effluent containing tartrazine can affect the environment and human health significantly prompting the current study into degradation using a sonochemical reactor operated individually and combined with advanced oxidation processes. The optimum conditions for ultrasound treatment were established as dye concentration of 10 ppm, pH of 3, temperature as 35 °C, and power as 90 W. The combination approach of H2O2/UV, H2O2/US, and H2O2/UV/US resulted in higher degradation of 25.44%, 57.4%, and 74.36% respectively. Use of ZnO/UV/US approach increased the degradation significantly to 85.31% whereas maximum degradation as 93.11% was obtained for the US/UV/Fenton combination. COD reduction was found maximum as 83.78% for the US/UV/Fenton combination. The kinetic analysis showed that tartrazine dye degradation follows pseudo first-order kinetics for all the studied processes. Combination of Fenton with UV and US was elucidated as the best approach for degradation of tartrazine.
Collapse
Affiliation(s)
- Sonali P Jadhav
- Department of Chemical Engineering, Gharda Institute of Technology, Lavel, Khed, Maharashtra, 415708, India
| | - Sudesh D Ayare
- Department of Chemical Engineering, Gharda Institute of Technology, Lavel, Khed, Maharashtra, 415708, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 400 019, India.
| |
Collapse
|
2
|
Momin RF, Gogate PR. Degradation of Procion brilliant yellow H-E6G using ultrasonic and hydrodynamic cavitation combined with oxidants with demonstration at pilot scale. Water Environ Res 2024; 96:e11011. [PMID: 38477462 DOI: 10.1002/wer.11011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/19/2024] [Accepted: 02/15/2024] [Indexed: 03/14/2024]
Abstract
The current study focuses on the degradation of Procion brilliant yellow H-E6G, an azo dye, using ultrasonic and hydrodynamic cavitation (HC), evaluating the impact of various parameters on the extent of degradation. The use of only ultrasound showed less oxidation capacity as indicated by only 19.1% degradation at an optimized power of 140 W, pH of 2.5, temperature of 40°C, and initial dye concentration of 15 ppm. The effectiveness of hybrid approaches involving US + H2 O2 , US + Fenton, and US + H2 O2 + potassium persulfate (KPS) was subsequently evaluated under optimized conditions. A notable enhancement in decolorization extent was observed for combined operations, including US + H2 O2 , US + Fenton, and US + H2 O2 + KPS (dual oxidant scheme) with the actual decolorization extents as 80.6%, 85%, and 92.2% respectively. An optimized scheme of US + H2 O2 + KPS was also utilized to decolorize the dye at a pilot scale using a US flow cell and also an HC reactor that yielded 91.8% and 88% reductions in initial concentration. The dye decolorization was elucidated to follow first-order kinetics for all the individual and combination approaches. The obtained values of the rate constants were also utilized for the evaluation of the synergistic index. A toxicity analysis was also performed on the dye, both before and following treatment, utilizing two bacterial strains. A comparative analysis of various treatment approaches has been presented focusing on factors such as cavitational yield, operational expenses, and energy requirements. The study elucidated that the combination of US + H2 O2 + KPS effectively removes Procion brilliant yellow H-E6G giving 92.2% as the maximum degradation at an operating cost of 0.1862 $/L. PRACTITIONER POINTS: First depiction of cavitative degradation of Procion brilliant yellow H-E6G Optimizing the equipment operating parameters and chemical oxidants Demonstration of optimized treatment scheme at pilot scale Evaluation of various approaches based on synergy and costs of treatment US + H2 O2 + KPS is the best approach for dye degradation.
Collapse
Affiliation(s)
- Rahat F Momin
- Chemical Engineering Department, Institute of Chemical Technology, Mumbai, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Mumbai, India
| |
Collapse
|
3
|
Dey A, Gogate PR. Comparative study of different ultrasound based hybrid oxidation approaches for treatment of real effluent from coke oven plant. J Environ Manage 2024; 352:120095. [PMID: 38266523 DOI: 10.1016/j.jenvman.2024.120095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 01/03/2024] [Accepted: 01/08/2024] [Indexed: 01/26/2024]
Abstract
The present study investigates the treatment of real coke plant effluent utilising several ultrasound-based hybrid oxidation approaches including Ultrasound (US) alone, US + catalyst, US + H2O2, US + Fenton, US + Ozone, and US + Peroxone, with main objective as maximizing the reduction of chemical oxygen demand (COD). Ultrasonic horn at power of 130 W, frequency as 20 kHz and duty cycle as 70% was applied. Study with varying catalyst (TiO2) dose from 0.5 g/L - 2 g/L revealed 1 g/L as the optimum dose resulting in 65.15% reduction in COD. A 40 ml/L dose of H2O2 was shown to be optimal, giving an 81.96% reduction in COD, based on the study of varied doses of H2O2 from 20 ml/L to 60 ml/L. US + Fenton reagent combination at optimum Fe2+/H2O2 (w/v) ratio of 1:1 resulted in a COD reduction of 85.29% whereas reduction of COD as 81.75% was obtained at the optimum flow rate of ozone as 1 LPM for US + Ozone approach. US + Peroxone demonstrated the best efficiency (90.48%) for COD reduction. To find the toxicity effects, the treated (US + peroxone) and non-treated samples were tested for the growth of bacterial cultures. It was observed that the toxicity of the treated sample increased only marginally after treatment. High-resolution liquid chromatography mass spectrometry (HR-LCMS) analysis was also performed to establish intermediate compounds. Overall, the coupling of ultrasound with oxidation processes produced better results with US + Peroxone established as best treatment approach for coke plant effluent.
Collapse
Affiliation(s)
- Ananya Dey
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 400 019, India.
| |
Collapse
|
4
|
Momin RF, Gogate PR. Degradation of Procion Brilliant Purple H-3R using ultrasound coupled with advanced oxidation processes. J Environ Manage 2024; 350:119642. [PMID: 38016239 DOI: 10.1016/j.jenvman.2023.119642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/21/2023] [Accepted: 11/15/2023] [Indexed: 11/30/2023]
Abstract
The complexity of wastewater matrix poses a challenge for conventional processes especially due to the presence of refractory compounds such as dyes. The present work focuses on utilizing ultrasound-induced cavitation in conjunction with different oxidants such as hydrogen peroxide, Fenton's reagent and potassium persulfate to treat Procion Brilliant Purple H-3R dye containing wastewater. The impact of various operating parameters as pH, frequency, and power on degradation levels has been studied with the aim of optimizing degradation. The optimal conditions for the degradation of Procion Brilliant Purple H-3R were determined as pH of 12, frequency of 22 kHz, and power of 250 W, resulting in a maximum degradation of 70.25%. Combination of a cavitation reactor with hydrogen peroxide, Fenton reagent, and KPS was then applied at optimized conditions, which confirmed a notable enhancement in degradation compared to the only ultrasound based process. Specifically, the degradation extent was 95.99% for combination with H2O2 at 0.5 g/L loading, 99.79% for combination with Fenton at H2O2/Fe2+ ratio of 50:1, and 99.05% for combination with KPS at loading of 0.75 g/L. The kinetic rate constant for the combined approach of US + Fenton was also maximum at 7.47 × 10-1 L mg-1 min-1. Toxicity analysis was conducted on two bacterial strains, Escherichia coli and Staphylococcus aureus, using the wastewater in native form and after treatment. The various processes were evaluated in terms of the cavitational yield and overall treatment cost and it was determined that US + Fenton process is the most efficient treatment method for fully degrading Procion Brilliant Purple H-3R, particularly at larger scales of operation and cost efficiently as demonstrated in the work.
Collapse
Affiliation(s)
- Rahat F Momin
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 400 019, India.
| |
Collapse
|
5
|
Joshi S, Agarkoti C, Gogate PR. Mapping of 20 L capacity ultrasonic reactor using cavitation activity meter and dye degradation. Ultrason Sonochem 2023; 101:106688. [PMID: 37952469 PMCID: PMC10665945 DOI: 10.1016/j.ultsonch.2023.106688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 10/10/2023] [Accepted: 11/06/2023] [Indexed: 11/14/2023]
Abstract
Mapping of a novel 20 L capacity ultrasonic (US) reactor having a total of 44 transducers was done by measuring the local cavitation intensity using a cavitation activity meter at different horizontal planes and subsequent validation based on dye degradation. A fixed frequency of 33 kHz and temperature of 30 °C was used during the mapping performed at two different power levels of 250 W and 400 W. In addition, the mapping of specific plane 2 was also performed with transducers operating on walls 1 and 3, while switching the transducers on walls 2 and 4 off and vice versa so as to establish the role of using multiple transducers. Degradation of RO4 dye was also measured at the plane 2 at various powers as 250 W, 400 W, and 1000 W. The degradation of the RO4 dye directly correlated to the cavitation intensity measured at the various location inside the US reactor. The average cavitation intensity was 265.38, 317.25, 185, and 300.5 Cavins for power dissipations of 250 W, 400 W, 250 W (wall 1 and 3 transducers in operation), and 400 W (wall 2 and 4 transducers in operation), respectively. Correspondingly, the average degradation was 10.35 %, 13.03 %, 5.52 %, and 8.9 % for same sequence of operational power and transducers. The investigation amply illustrated dependency of the cavitational activity on the location, power dissipation, and operating mode elucidating important design related information useful for scale up of sonochemical reactors.
Collapse
Affiliation(s)
- Shubham Joshi
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 40019, India
| | - Chandrodai Agarkoti
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 40019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 40019, India.
| |
Collapse
|
6
|
Das S, Agarkoti C, Gogate PR. A novel method for the remediation of wastewater containing acid red 131 dye using acoustic cavitation combined with sulphur-doped TiO 2 and oxidants. Environ Monit Assess 2023; 195:972. [PMID: 37468642 DOI: 10.1007/s10661-023-11583-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 07/03/2023] [Indexed: 07/21/2023]
Abstract
The present study investigated the degradation of Acid Red 131 (AR131) dye using a combination of ultrasound-induced cavitation, ultraviolet (UV) irradiation, chemical oxidants, and photocatalyst, focusing on the effect of operating parameters. It was established that acidic pH, higher input power, and lower initial concentration resulted in higher degradation. Sulphur-doped titanium dioxide (S-TiO2) synthesized using a novel ultrasound-assisted method showed an optimum dosage of 300 ppm for the AR131 degradation with sulphur to titanium ratio of 2:1. In the combination approach, the optimum dosage of hydrogen peroxide (H2O2) and potassium persulfate (KPS) was established as 100 ppm and 400 ppm respectively. The maximum degradation of 90.3% was obtained using a combined approach of US + KPS + UV/S-TiO2 whereas, a maximum synergetic coefficient of 1.57 was obtained for the approach of US + UV/S-TiO2 with degradation of 86.96%. It was also elucidated that for combination approaches of US + H2O2, US + H2O2 + KPS, and US + H2O2 + KPS + UV/S-TiO2, the synergetic coefficients were lower than one due to undesirable side reactions and radical scavenging. Scale-up studies performed at 15 times of the laboratory scale volume, elucidated that the maximum degradation was obtained as 58.01% for the approach of US + KPS + UV/S-TiO2. Therefore, the approach of US + KPS + UV/S-TiO2 was elucidated as the most efficient in degrading the AR131 dye at both small and large scale of operation. In terms of synergy, the approach of US + UV/S-TiO2 was more efficient. Overall, an optimized combination approach was successfully demonstrated for the effective degradation of AR131 dye with synergism and better results at a large scale.
Collapse
Affiliation(s)
- Subhamita Das
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India
| | - Chandrodai Agarkoti
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India.
| |
Collapse
|
7
|
Lakshmi NJ, Gogate PR, Pandit AB. Acoustic cavitation for the process intensification of biological oxidation of CETP effluent containing mainly pharmaceutical compounds: Understanding into effect of parameters and toxicity analysis. Ultrason Sonochem 2023; 98:106524. [PMID: 37451007 PMCID: PMC10368907 DOI: 10.1016/j.ultsonch.2023.106524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 06/20/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Abstract
The current work investigates the efficacy of acoustic cavitation (AC) based pretreatment as a process intensification method for improving the conventional biological oxidation (BO) treatment of the effluent from common effluent treatment plant (CETP) mainly containing pharmaceutical compounds. The effluent acclimatized with cow dung-based sludge was utilized for the aerobic oxidation with an optimum condition of 1:3 ratio of sludge to effluent and 6 h as duration. COD reduction of 19.58% was achieved with the conventional biological oxidation, which was demonstrated to be improved by incorporating acoustic cavitation-based pretreatment approaches under optimized conditions of 125 W and 70% duty cycle for only AC as well as oxidant loadings as 1000 mg/L for H2O2, 250 mg/L Fe(II) with 1000 mg/L H2O2 for Fenton, 1000 mg/L for KPS and 0.5 L/min for the O3 during the combination approaches. The improved COD reduction after the use of pretreatment approaches followed by the BO of 6 h duration was 29.26%, 72.42%, 85.47%, 45.68% and 69.26% for the AC, AC + H2O2, AC + Fenton, AC + KPS and AC + O3 based approaches respectively. The toxicity assay of the effluent before and after every pretreatment approach using bacterial strains ofStaphylococcus aureusandPseudomonas aeruginosaensured the biodegradability of the treated effluent as no toxic intermediates could be seen. Overall, the present work elucidated the effectiveness of acoustic cavitation-based pretreatment approaches for the improvement of conventional BO of CETP effluent.
Collapse
Affiliation(s)
- N J Lakshmi
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
| | - Aniruddha B Pandit
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| |
Collapse
|
8
|
Dey A, Korde S, Gogate PR, Agarkoti C. Sonochemical synthesis of Ce-TiO 2 nanocatalyst and subsequent application for treatment of real textile industry effluent. Ultrason Sonochem 2023; 96:106426. [PMID: 37156159 DOI: 10.1016/j.ultsonch.2023.106426] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/31/2023] [Accepted: 04/28/2023] [Indexed: 05/10/2023]
Abstract
Treatment of real textile industry effluent using photocatalysis, sonocatalysis, sonophotocatalysis and H2O2 assisted sonophotocatalysis have been studied based on the use of Ce-TiO2 nanocatalyst synthesized using sonochemical co-precipitation method. Characterization studies of the obtained catalyst revealed crystallite size as 1.44 nm with particles having spherical morphology. A shift of the absorption edge to the visible light range was also observed in UV-Vis diffuse reflectance spectra (UV-DRS) analysis. The effects of different operational parameters viz catalyst dose (0.5 g/L-2 g/L), temperature (30 °C-55 °C) and pH (3-12) on the COD reduction were studied. The reduction in the COD was higher at lower pH and the optimum temperature established was 45 °C. It was also elucidated that the required catalyst dose was lesser in combined sonophotocatalysis when compared with individual photocatalysis and sonocatalysis. Combination of processes and addition of oxidants increased the COD reduction with the sonophotocatalytic oxidation combined with H2O2 treatment showing the best results for COD reduction (84.75%). The highest reduction in COD for photocatalysis was only 45.09% and for sonocatalysis, it was marginally higher at 58.62%. The highest reduction in COD achieved by sonophotocatalysis was 64.41%. Toxicity tests coupled with Liquid Chromatography Mass Spectrometry (LC-MS) analysis revealed that there were no additional toxic intermediates added to the system during the treatment. Kinetic study allowed establishing that generalized kinetic model fits the experimental results well. Overall, the combined advanced oxidation processes showed better results than the individual processes with higher COD reduction and lower requirement of the catalyst.
Collapse
Affiliation(s)
- Ananya Dey
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India; NMIMS Mukesh Patel School of Technology Management & Engineering, Mumbai, India
| | - Shrivatsa Korde
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India.
| | - Chandrodai Agarkoti
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
| |
Collapse
|
9
|
Aranha DJ, Gogate PR. A Review on Green and Efficient Synthesis of 5-Hydroxymethylfurfural (HMF) and 2,5-Furandicarboxylic Acid (FDCA) from Sustainable Biomass. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c04047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- Danwyn J. Aranha
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai-400019, India
| | - Parag R. Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai-400019, India
| |
Collapse
|
10
|
Agarkoti C, Chaturvedi A, Gogate PR, Pandit AB. Degradation of sulfamerazine using ultrasonic horn and pilot scale US reactor in combination with different oxidation approaches. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
|
11
|
Jadhav HB, Raina I, Gogate PR, Annapure US, Casanova F. Sonication as a Promising Technology for the Extraction of Triacylglycerols from Fruit Seeds—A Review. FOOD BIOPROCESS TECH 2023. [DOI: 10.1007/s11947-022-02987-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
12
|
Sukhatskiy Y, Shepida M, Sozanskyi M, Znak Z, Gogate PR. Periodate-based advanced oxidation processes for wastewater treatment: A review. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122305] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
13
|
Chakinala N, Ranjan P, Chakinala AG, Gogate PR. Performance comparison of photocatalysts for degradation of organic pollutants using experimental studies supported with DFT and fundamental characterization. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
|
14
|
|
15
|
Affiliation(s)
- Harsh B. Jadhav
- Department of Food Engineering and Technology Institute of Chemical Technology Mumbai‐19
| | - Parag R. Gogate
- Department of Chemical Engineering Institute of Chemical Technology Mumbai‐19
| | - Uday S. Annapure
- Department of Food Engineering and Technology Institute of Chemical Technology Mumbai‐19
| |
Collapse
|
16
|
Awari HD, Sabnis SS, Gogate PR. Improved Crystallization of Ampicillin Trihydrate Based on the Use of Ultrasound. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c03804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Harshad D. Awari
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India
| | - Sarvesh S. Sabnis
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India
| | - Parag R. Gogate
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India
| |
Collapse
|
17
|
Gandhi SS, Gogate PR, Senthilkumar M. Comparison of Multivariable Models for Predicting Kinematic Viscosity of Biodiesel Obtained Using Transesterification in Ultrasonic Horn. Arab J Sci Eng 2022. [DOI: 10.1007/s13369-022-06565-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
18
|
Affiliation(s)
- Priya
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Parag R. Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| |
Collapse
|
19
|
Sabnis SS, Singh SD, Gogate PR. Improvements in azithromycin recrystallization using ultrasound for size reduction. Ultrason Sonochem 2022; 83:105922. [PMID: 35091234 PMCID: PMC8800140 DOI: 10.1016/j.ultsonch.2022.105922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 01/14/2022] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
The primary motive of the current work is to achieve smaller mean particle size with narrow size distribution that can enhance the bioavailability of azithromycin (ARZ), an essential requirement due to its poor water solubility. Recrystallization of ARZ was evaluated using cooling as well as antisolvent crystallization approaches in the presence of ultrasonic irradiation with detailed study into effect of different parameters such as ultrasonic power, time and temperature. Ultrasound assisted antisolvent crystallization at low temperatures (<10℃) yielded best size reduction up to 80% with narrower distribution and also gave better yield of the product, that too within 5 min of sonication. With scale up considerations, recirculation mode of operation was also evaluated which offered promising results for the size reduction. Images captured using optical microscope and SEM revealed a nearly uniform rod/plate-shaped geometry. Increase in amorphous nature of ARZ was confirmed based on XRD analysis. FTIR analysis showed no significant changes in the functional groups when compared to the original sample. Overall, the work demonstrated an improved reprocessing approach based on the use of ultrasound with insights into effect of operating parameters and effect of ultrasound on various characteristics.
Collapse
Affiliation(s)
- Sarvesh S Sabnis
- Chemical Engineering Department, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India
| | - Shikhar D Singh
- Chemical Engineering Department, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India.
| |
Collapse
|
20
|
Bhosale GS, Vaidya PD, Gogate PR, Joshi JB, Patil RN. Ozonation of phenol and substituted phenols: Dependency of the reaction rate constant on the molecular structure. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ghanshyam S. Bhosale
- Department of Chemical Engineering Institute of Chemical Technology Mumbai India
- Homi Bhabha National Institute Mumbai India
| | - Prakash D. Vaidya
- Department of Chemical Engineering Institute of Chemical Technology Mumbai India
| | - Parag R. Gogate
- Department of Chemical Engineering Institute of Chemical Technology Mumbai India
| | - Jyeshtharaj B. Joshi
- Department of Chemical Engineering Institute of Chemical Technology Mumbai India
- Technoforce Solutions (India) Pvt. Ltd. Nashik India
| | | |
Collapse
|
21
|
Lahiri S, Mandal D, Biswas S, Gogate PR, Bhardwaj RL. Sonocatalytic recovery of ceria from graphite and inhibition of graphite erosion by ionic liquid based platinum nanocatalyst. Ultrason Sonochem 2022; 82:105863. [PMID: 34896908 PMCID: PMC8666554 DOI: 10.1016/j.ultsonch.2021.105863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 11/15/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
Use of ultrasound as an intensified non-destructive decontamination technique for processing graphite limits its reusability beyond a few number of decontamination cycles due to the exfoliation of graphite due to cavitation effects. The current work establishes that the use of platinum nanoparticles in the leachant reduces the erosion of graphite substrate due to cavitation. It presents an improved way of sonochemical recovery of ceria using a mixture of nitric acid, formic acid and hydrazinium nitrate in the presence of platinum nanoparticles and ionic liquid. The platinum nanoparticles catalyst in ionic liquid prevented the generation of the carbon residue due to the combined effect of denitration and reduced sonication. The presence of the catalyst showed a fivefold increase in dissolution kinetics of ceria as well as absence of graphite erosion, facilitating better chances of graphite recycling than the decontamination without the catalyst. The catalytic approach offers a better recycle strategy for graphite with reduced exfoliation and NOx generation due to denitration, making it a more sustainable decontamination process. Since ceria is used as a surrogate for plutonium oxide, the results can be extended to decontaminate such deposits clearly establishing the utility of the presented results in the nuclear industry.
Collapse
Affiliation(s)
- Sutanwi Lahiri
- Laser& Plasma Technology Division,Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai 400094, India.
| | - D Mandal
- Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai 400094, India; Alkali Material & Metal Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - S Biswas
- Uranium Extraction Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - P R Gogate
- Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - R L Bhardwaj
- Laser& Plasma Technology Division,Bhabha Atomic Research Centre, Mumbai 400085, India
| |
Collapse
|
22
|
Kininge MM, Gogate PR. Intensification of alkaline delignification of sugarcane bagasse using ultrasound assisted approach. Ultrason Sonochem 2022; 82:105870. [PMID: 34920353 PMCID: PMC8683778 DOI: 10.1016/j.ultsonch.2021.105870] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/08/2021] [Accepted: 12/09/2021] [Indexed: 05/24/2023]
Abstract
Ultrasound-assisted approach has been investigated for delignification so as to develop green and sustainable technology. Combination of NaOH with ultrasound has been applied with detailed study into effect of various parameters such as time (operating range of 15-90 min), alkali concentration (0.25 M-2.5 M), solvent loading (1:15-1:30 w/v), temperature (50-90 ˚C), power (40-140 W) and duty cycle (40-70 %) at fixed frequency of 20 kHz. The optimized operating conditions established for the ultrasonic horn were 1 M as the NaOH concentration, 1 h as treatment time, 70˚C as the operating temperature, 1:20 as the biomass loading ratio, 100 W as the ultrasonic power and 70% duty cycle yielding 67.30% as the delignification extent. Comparative study performed using conventional and ultrasonic bath assisted alkaline treatment revealed lower delignification as 48.09% and 61.55% respectively. The biomass samples were characterized by SEM, XRD, FTIR and BET techniques to establish the role of ultrasound during the treatment. The morphological changes based on the ultrasound treatment demonstrated by SEM were favorable for enhanced delignification and also the crystallinity index was more in the case of ultrasound treated material than that obtained by conventional method. Specific surface area and pore size determinations based on BET analysis also confirmed beneficial role of ultrasound. The overall results clearly demonstrated the intensification obtained due to the use of ultrasonic reactors.
Collapse
Affiliation(s)
- Madhuri M Kininge
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India.
| |
Collapse
|
23
|
Agarkoti C, Thanekar PD, Gogate PR. Cavitation based treatment of industrial wastewater: A critical review focusing on mechanisms, design aspects, operating conditions and application to real effluents. J Environ Manage 2021; 300:113786. [PMID: 34649311 DOI: 10.1016/j.jenvman.2021.113786] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/28/2021] [Accepted: 09/18/2021] [Indexed: 06/13/2023]
Abstract
Acoustic cavitation (AC) and hydrodynamic cavitation (HC) coupled with advanced oxidation processes (AOPs) are prominent techniques used for industrial wastewater treatment though most studies have focused on simulated effluents. The present review mainly focuses on the analysis of studies related to real industrial effluent treatment using acoustic and hydrodynamic cavitation operated individually and coupled with H2O2, ozone, ultraviolet, Fenton, persulfate and peroxymonosulfate, and other emerging AOPs. The necessity of using optimum loadings of oxidants in the various AOPs for obtaining maximum COD reduction of industrial effluent have been demonstrated. The review also presents critical analysis of designs of various HCRs that have been or can be used for the treatment of industrial effluents. The impact of operating conditions such as dilution, inlet pressure, ultrasonic power, pH, and operating temperature have been also discussed. The economic aspects of the industrial effluent treatment have been analyzed. HC can be considered as cost-efficient approach compared to AC on the basis of the lower operating costs and better transfer efficiencies. Overall, HC combined with AOPs appears to be an effective treatment strategy that can be successfully implemented at industrial-scale of operation.
Collapse
Affiliation(s)
- C Agarkoti
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 40019, India
| | - P D Thanekar
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 40019, India
| | - P R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, 40019, India.
| |
Collapse
|
24
|
Kodavatiganti S, Bhat AP, Gogate PR. Intensified degradation of Acid Violet 7 dye using ultrasound combined with hydrogen peroxide, Fenton, and persulfate. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119673] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
25
|
Affiliation(s)
- Rajeshree A. Khaire
- Chemical Engineering Department Institute of Chemical Technology Mumbai India
| | - Bhaskar N. Thorat
- Chemical Engineering Department Institute of Chemical Technology Mumbai India
| | - Parag R. Gogate
- Chemical Engineering Department Institute of Chemical Technology Mumbai India
| |
Collapse
|
26
|
Mahendran V, Gogate PR. Degradation of Acid Scarlet 3R dye using oxidation strategies involving photocatalysis based on Fe doped TiO2 photocatalyst, ultrasound and hydrogen peroxide. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119011] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
27
|
Sabnis SS, Banakar VV, Gogate PR, Raha A, Saurabh, Adak AK. Intensification of Sonocrystallization of CaSO 4 in Continuous Operation Using a Tube Sonicator. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sarvesh S. Sabnis
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India
| | - Vikram V. Banakar
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India
| | - Parag R. Gogate
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India
| | - Abhijit Raha
- Desalination & Membrane Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Saurabh
- Desalination & Membrane Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Asis K. Adak
- Desalination & Membrane Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| |
Collapse
|
28
|
Jadhav HB, Gogate PR, Annapure US. Intensification of Enzymatic Synthesis of Corn Oil Designer Lipids Using Sonication. Arab J Sci Eng 2021. [DOI: 10.1007/s13369-021-06255-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
29
|
More SB, Gogate PR, Waghmare JS. Bioactives from pomegranate peel and moringa leaves as natural antioxidants for stability of edible oil blends. Braz J Chem Eng 2021. [DOI: 10.1007/s43153-021-00150-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
30
|
Daware GB, Gogate PR. Intensified sonochemical degradation of 2-Picoline in combination with advanced oxidizing agents. Ultrason Sonochem 2021; 77:105702. [PMID: 34375945 PMCID: PMC8358469 DOI: 10.1016/j.ultsonch.2021.105702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 07/10/2021] [Accepted: 07/29/2021] [Indexed: 05/10/2023]
Abstract
2-picoline is a very important pyridine derivative with significant applications though it is also poisonous and harmful having considerable adverse influence on aquatic life, environment and organisms. The need for developing effective treatment methodologies for 2-Picoline directed the current work focusing on degradation of 2-Picoline using the combination of ultrasound and advanced oxidants such as hydrogen peroxide (H2O2), potassium persulphate (KPS), Fenton's reagent, and Peroxymonosulphate (PMS) along with the use of Titanium oxide (TiO2) as catalyst. Ultrasonic bath having 8 L capacity and operating frequency of 40 ± 2 kHz has been used. The effect of parameters like power, initial pH, temperature, time and initial concentration of 2-Picoline were studied to establish best operating conditions which were further used in the combination treatment approaches of ultrasound with oxidising agents. The chemical oxygen demand (COD) reduction for the optimized approaches of ultrasound in combination with oxidizing agents was also determined. Degradation experiments were performed using oxidising agents also in absence of ultrasound to investigate the individual treatment capacity of the oxidants and also the synergetic index for the combination. Kinetic study demonstrated that second order model suited for all the treatment approaches except US/Fenton where first order model fitted better. Ultrasound in combination with Fenton reagent demonstrated a substantial synergy for the degradation of 2-Picoline compared to other treatment approaches showing highest degradation of 97.6 %, synergetic index as 5.71, cavitational yield of 1.82 × 10-5 mg/J and COD removal of 82.4 %.
Collapse
Affiliation(s)
- G B Daware
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India
| | - P R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India.
| |
Collapse
|
31
|
Lahiri S, Mishra A, Mandal D, Bhardwaj RL, Gogate PR. Sonochemical recovery of uranium from nanosilica-based sorbent and its biohybrid. Ultrason Sonochem 2021; 76:105667. [PMID: 34265634 PMCID: PMC8281597 DOI: 10.1016/j.ultsonch.2021.105667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/02/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
Use of nanomaterials to remove uranium by adsorption from nuclear wastewater is widely applied, though not much work is focused on the recovery of uranium from the sorbents. The present work reports the recovery of adsorbed uranium from the microstructures of silica nanoparticles (SiO2M) and its functionalized biohybrid (fBHM), synthesized with Streptococcus lactis cells and SiO2M, intensified using ultrasound. Effects of temperature, concentration of leachant (nitric acid), sonic intensity, and operating frequency on the recovery as well as kinetics of recovery were thoroughly studied. A comparison with the silent operation demonstrated five and two fold increase due to the use of ultrasound under optimum conditions in the dissolution from SiO2M and fBHM respectively. Results of the subsequent adsorption studies using both the sorbents after sonochemical desorption have also been presented with an aim of checking the efficacy of reusing the adsorbent back in wastewater treatment. The SiO2M and fBHM adsorbed 69% and 67% of uranium respectively in the second cycle. The adsorption capacity of fBHM was found to reduce from 92% in the first cycle to 67% due to loss of adsorption sites in the acid treatment. Recovery and reuse of both the nuclear material and the sorbent (with some make up or activation) would ensure an effective nuclear remediation technique, catering to UN's Sustainable Development Goals.
Collapse
Affiliation(s)
- S Lahiri
- Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai 400094, India.
| | - A Mishra
- Nuclear Agriculture & Biotechnology Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - D Mandal
- Alkali Material & Metal Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai 400094, India
| | - R L Bhardwaj
- Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - P R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| |
Collapse
|
32
|
Gujar SK, Gogate PR. Application of hybrid oxidative processes based on cavitation for the treatment of commercial dye industry effluents. Ultrason Sonochem 2021; 75:105586. [PMID: 34004457 PMCID: PMC8141528 DOI: 10.1016/j.ultsonch.2021.105586] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 04/29/2021] [Accepted: 05/05/2021] [Indexed: 05/05/2023]
Abstract
The present work demonstrates the significant role of ultrasound (US) in intensifying the efficacy of the combination with Fenton reagent and/or ozone for the treatment of real dye industry industrial effluent procured from the local industry. Initial part of the work focused on analysing the literature based on combination approaches of US with different oxidants applied for the treatment of real and simulated effluents focusing on the dyes. The work also provides guidelines for the selection of optimal operating parameters for maximizing the intensification of the degradation. The second part of the work presents an experimental study into combined approaches of ultrasound with ozone (O3) and Fenton's reagent for treatment of real effluent. Under optimized conditions (100 W, 20 kHz and duty cycle of 70%), maximum COD reductions of 94.79% and 51% were observed using a combined approach of US + Fenton oxidation followed by lime treatment for the treatment of effluent-I and effluent-II respectively at H2O2 loading of 17.5 g/L, H2O2/Fe2+ ratio of 3, pH of 4, CaO dose of 1 g/L and an overall treatment time of 70 min. US + Fenton + O3 followed by lime was also applied for treatment under ozone loading of 1 g/h for the treatment of effluent-I and it was found that maximum COD reduction of 95.12% was obtained within 30 min of treatment time, indicating use of ozone did not result in significant value addition in terms of COD reduction but resulted in faster treatment. HC (inlet pressure: 4 bar) + Fenton + Lime scheme was successfully replicated on a pilot-scale resulting in maximum COD reduction of 57.65% within 70 min of treatment time. Overall, it has been concluded that the hybrid oxidative processes as US + Fenton followed by lime treatment is established as the best approach ensuring effective COD reduction at the same time obtaining final colourless/reusable effluent.
Collapse
Affiliation(s)
- Swapnil K Gujar
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
| |
Collapse
|
33
|
Affiliation(s)
- Priya
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Parag R. Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| |
Collapse
|
34
|
Sinhmar PS, Gogate PR. Improved Activation of Titanium Dioxide Catalyst for Isomerization of Alpha Pinene and Understanding into Effect of Isomerization Parameters. Arab J Sci Eng 2021. [DOI: 10.1007/s13369-021-05706-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
35
|
Znak Z, Zin O, Mashtaler A, Korniy S, Sukhatskiy Y, Gogate PR, Mnykh R, Thanekar P. Improved modification of clinoptilolite with silver using ultrasonic radiation. Ultrason Sonochem 2021; 73:105496. [PMID: 33636551 PMCID: PMC7906887 DOI: 10.1016/j.ultsonch.2021.105496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/17/2021] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
The modification of natural clinoptilolite with silver ions using ultrasound has been investigated in the current work. The modification process was performed using clinoptilolite of different fractions (0-3.0 mm) over the temperature range of 25-55 °C, ultrasonic power range of 8.0-12.5 W and AgNO3 concentration range of 0.01-0.1 M. The zeolite modification was performed in the presence of sonication and mechanical stirring in separate runs for comparison. Fundamental analysis demonstrated that the use of ultrasound ensures desorption of air from clinoptilolite particles and accelerates the diffusion of Ag+ ions and subsequent ion exchange. Increasing the particle size of clinoptilolite led to a natural decrease in its sorption capacity. A slight increase in the sorption capacity with an increase in the equivalent particle diameter from 0.081 to 0.35 mm was seen due to changes in the structure of clinoptilolite particles during mechanical grinding. The calculated temperature coefficient of the sorption process of Ag+ ions as <1.47 means that the modification takes place with dominant control in the intradiffusion region. Increasing the power of ultrasonic irradiation did not provide a monotonous change in the sorption capacity of clinoptilolite. Increasing the concentration of argentum nitrate solution provided an increase in the content of silver ions in clinoptilolite. In general, the advantage of using ultrasonic vibrations to modify the natural clinoptilolite of different fractions with Ag+ ions was demonstrated in terms of achieving higher sorption capacity, also elucidating the effect of different operating conditions.
Collapse
Affiliation(s)
- Z Znak
- Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, Bandera Str., Lviv 79013, Ukraine.
| | - O Zin
- Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, Bandera Str., Lviv 79013, Ukraine
| | - A Mashtaler
- Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, Bandera Str., Lviv 79013, Ukraine
| | - S Korniy
- Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Naukova Str., Lviv 79060, Ukraine
| | - Yu Sukhatskiy
- Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, Bandera Str., Lviv 79013, Ukraine
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 40019, India.
| | - R Mnykh
- Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, Bandera Str., Lviv 79013, Ukraine
| | - Pooja Thanekar
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 40019, India
| |
Collapse
|
36
|
Lahiri S, Mandal D, Gogate PR, Ghosh A, Bhardwaj RL. Cavitation-assisted decontamination of yttria from graphite of different densities. Ultrason Sonochem 2021; 73:105520. [PMID: 33773435 PMCID: PMC8027900 DOI: 10.1016/j.ultsonch.2021.105520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/01/2021] [Accepted: 03/08/2021] [Indexed: 06/12/2023]
Abstract
Yttria coated graphite crucibles are widely used to handle molten refractory and radioactive metals like uranium and plutonium. However, the coated layer suffers damages like cracking and peeling off owing to thermal cycles. As a result, removal of the yttria layer from the graphite surface is essential to ensure reuse of the crucible and minimization of radioactive waste. The present work investigates intensified dissolution of yttria from the coated graphite samples using ultrasound as a non-destructive decontamination technique to recycle the graphite substrate. The optimum conditions established for maximum dissolution were 8 M as acid strength, frequency of 30 kHz, temperature of 45 °C and power density of 8 W cm-2 that resulted in maximum dissolution of 52% in 30 min. Use of an oxidant H2O2 to the acid, did not yield any improvement in the dissolution kinetics, instead, increased oxidation of the graphite substrate was observed, leading to the anomalous weight gain of the graphite substrate despite surface erosion. Effect of ultrasound on the dissolution was pronounced, with almost a threefold increase compared to dissolution performed under silent conditions. Rates of dissolution of yttria from the substrate of different densities and pore size distribution were also studied. The dissolution was slowest from graphite of density 1.82 g cm-3 as the pore size distribution was conducive to accommodate the yttria particles. The dissolution in nitric acid followed ash layer diffusion controlled kinetics. The study has demonstrated the efficacy of application of ultrasound for accelerated decontamination of graphite substrates.
Collapse
Affiliation(s)
- S Lahiri
- Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai 400094, India.
| | - D Mandal
- Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai 400094, India; Alkali Material & Metal Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - P R Gogate
- Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - A Ghosh
- Glass & Advanced Materials Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - R L Bhardwaj
- Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| |
Collapse
|
37
|
Jadhav HB, Gogate PR, Waghmare JT, Annapure US. Intensified synthesis of palm olein designer lipids using sonication. Ultrason Sonochem 2021; 73:105478. [PMID: 33571940 PMCID: PMC7875818 DOI: 10.1016/j.ultsonch.2021.105478] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 01/09/2021] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
The present study deals with intensified synthesis of designer lipids with application of ultrasound based on biocatalyzed reaction between long chain triglyceride and medium chain fatty acid. The effects of various reaction conditions like molar ratio of reactant, reaction temperature, and enzyme loading along with the effect of ultrasound parameters such as duty cycle and irradiation time on the rate of formation of designer lipids has been investigated. The ultrasound assisted process was also compared with the traditional process so as to clearly bring out the intensification effects. During the study, it was clearly demonstrated that the optimum reaction conditions for maximum yield of designer lipids as 92% was molar ratio of medium chain fatty acid to long chain triglyceride as 4:1, reaction temperature of 40 °C, enzyme loading of 3%, duty cycle of 70%, 240 W as power dissipation and 360 min as reaction time. The recyclability study of enzyme showed its effectiveness up to 10 cycles. The synthesized designer lipid showed higher oxidative stability for 35 days and also showed Newtonian behaviour with eye appealing colour. The current study demonstrates development of an eco-friendly technique for intensified synthesis of designer lipids having numerous nutraceutical benefits.
Collapse
Affiliation(s)
- Harsh B Jadhav
- Department of Food Engineering and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India.
| | - Jyotsna T Waghmare
- Department of Oils, Oleochemicals and Surfactant Technology, Institute of Chemical Technology, Mumbai 400019, India.
| | - Uday S Annapure
- Department of Food Engineering and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
| |
Collapse
|
38
|
Tiple A, Sinhmar PS, Gogate PR. Improved direct synthesis of TiO 2 catalyst using sonication and its application for the desulfurization of thiophene. Ultrason Sonochem 2021; 73:105547. [PMID: 33845244 PMCID: PMC8059087 DOI: 10.1016/j.ultsonch.2021.105547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 03/28/2021] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
TiO2 catalyst was synthesized in the presence of ultrasound (ultrasonic horn at 20 kHz frequency and 70% duty cycle) at different power (80 W to 120 W) and durations as well as surfactant concentration with an objective of establishing best conditions for achieving lowest particle size of the photocatalyst. Detailed characterization in terms of crystal phase, crystallinity, functional groups and morphology of the photocatalyst has been performed using SEM, XRD and FTIR analysis. It was demonstrated that sonication significantly reduced the particle size with high degree of sphericity and homogeneity as compared to conventionally synthesized TiO2 with similar crystallinity in both cases. The catalytic performance was subsequently evaluated for the deep desulfurization of thiophene. Different desulfurization approaches including individual US (ultrasonic horn at 20 kHz frequency, 110 W power and 70% duty cycle) and UV irradiations, US/UV, US/UV/H2O2, US/UV/TiO2 and US/UV/H2O2/TiO2 were applied to evaluate the catalytic activity. The best approach was demonstrated as US/UV/H2O2/TiO2 and also activity of catalyst synthesized using ultrasound was much better compared to conventionally synthesized catalyst. The studies related to different model solvents demonstrated lowest reactivity for toluene whereas n-hexane and n-octane resulted in complete desulfurization in 60 min and 50 min treatment respectively. The desulfurization followed pseudo first order reaction kinetics irrespective of the solvent used. Overall the work clearly demonstrated the efficacy of ultrasound in improving the catalyst synthesis as well as desulfurization of thiophene.
Collapse
Affiliation(s)
- Ashlesha Tiple
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Pankaj S Sinhmar
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
| |
Collapse
|
39
|
Agarkoti C, Gogate PR, Pandit AB. Comparison of acoustic and hydrodynamic cavitation based hybrid AOPs for COD reduction of commercial effluent from CETP. J Environ Manage 2021; 281:111792. [PMID: 33383477 DOI: 10.1016/j.jenvman.2020.111792] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 11/13/2020] [Accepted: 12/02/2020] [Indexed: 05/10/2023]
Abstract
The present work investigates the treatment of commercial effluent obtained from Common Effluent Treatment Plants (CETP) using acoustic cavitation (AC) and hydrodynamic cavitation (HC) based hybrid AOPs. Comparison of different hybrid AOPs viz. H2O2, Fe2+/H2O2, Fe2+/H2O2/Air, Fe2+/H2O2/S2O82- and Fe2+/H2O2/S2O82-/Air in combination with both AC and HC has been performed in terms of extent of chemical oxygen demand (COD) reduction and kinetic rate constants. The best results of COD reduction as 95.2% and 97.28% were obtained for AC/Fe2+/H2O2/Air and HC/Fe2+/H2O2/Air systems respectively at Fe2+/H2O2 ratio of 0.1 and pH of 2 within 60 min of treatment under conditions of ultrasonic power dissipation as 150 W, inlet pressure for HC as 4 bar (as applicable depending on process) and temperature of 30 ± 2 °C. Slightly lower efficacy was established for the combination approach involving AC or HC coupled with Fe2+-activated S2O82- and H2O2 yielding COD reduction of 82.9% and 86.93% for the AC/Fe2+/H2O2/S2O82-/Air and HC/Fe2+/H2O2/S2O82-/Air systems respectively at Fe2+/H2O2/S2O82- ratio of 1:40:17.5. Cost estimation on the basis of cavitational yield performed on the AC and HC based treatment systems revealed economical nature of HC based treatment. Kinetic studies were also performed by fitting the experimental data with pseudo first order kinetic model (PFOKM), generalized kinetic model (GKM) and Behnajady-Modirshahla-Ghanbery kinetic model (BMGKM). It was demonstrated that GKM provided best fitting for all the experiments whereas BMGKM was most suitable for Fenton based reactions. It was clearly established that complex CETP effluent can be effectively treated using the combined approaches based on HC with potential for larger scale operation.
Collapse
Affiliation(s)
- Chandrodai Agarkoti
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India.
| | - Aniruddha B Pandit
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 40019, India
| |
Collapse
|
40
|
Bhat AP, Gogate PR. Degradation of nitrogen-containing hazardous compounds using advanced oxidation processes: A review on aliphatic and aromatic amines, dyes, and pesticides. J Hazard Mater 2021; 403:123657. [PMID: 33264866 DOI: 10.1016/j.jhazmat.2020.123657] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/29/2020] [Accepted: 08/01/2020] [Indexed: 06/12/2023]
Abstract
Nitrogen-containing amino and azo compounds are widely used in textile, agricultural and chemical industries. Most of these compounds have been demonstrated to be resistant to conventional degradation processes. Advanced oxidation processes can be effective to mineralize nitrogen-containing compounds and improve the efficacy of overall treatment schemes. Due to a global concern for the occurrence of toxic and hazardous amino-compounds and their harmful degradation products in water, it is important to develop technologies that focus on all the aspects of their degradation. Our focus is to present a state-of-the-art review on the degradation of several amine- and azo-based compounds using advanced oxidation processes. The categories reviewed are aromatic amines, aliphatic amines, N-containing dyes and N-containing pesticides. Data has been compiled for degradation efficiencies of each process, reaction mechanisms focusing on specific attack of oxidants on N atoms, the effect of process parameters like pH, initial concentration, time of treatment, etc. and identification of intermediates. Several AOPs have been compared to provide a systematic overview of available literature that will drive essential aspects of future research on amine-based compounds. Ozone is observed to be highly reactive to most amines, dyes and pesticides, followed by Fenton processes. Degradation of amines is highly sensitive to pH and mechanisms differ at different pH values. Cavitation is a promising alternative pre-treatment method for cost reduction. Hybrid methods under optimized conditions are demonstrated to give synergistic effects and must be tailored for specific effluents in question. In conclusion, even though nitrogen-containing compounds are recalcitrant in nature, the use of advanced oxidation processes at carefully established optimum conditions can yield highly efficient degradation of the compounds.
Collapse
Affiliation(s)
- Akash P Bhat
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 400019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai, 400019, India.
| |
Collapse
|
41
|
Gujar SK, Gogate PR, Kanthale P, Pandey R, Thakre S, Agrawal M. Combined oxidation processes based on ultrasound, hydrodynamic cavitation and chemical oxidants for treatment of real industrial wastewater from cellulosic fiber manufacturing sector. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117888] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
42
|
Pakhale VD, Gogate PR. Removal of Rhodamine 6G from Industrial Wastewater Using Combination Approach of Adsorption Followed by Sonication. Arab J Sci Eng 2021. [DOI: 10.1007/s13369-020-05074-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
43
|
Thanekar P, Gogate PR, Znak Z, Sukhatskiy Y, Mnykh R. Degradation of benzene present in wastewater using hydrodynamic cavitation in combination with air. Ultrason Sonochem 2021; 70:105296. [PMID: 32769044 PMCID: PMC7786596 DOI: 10.1016/j.ultsonch.2020.105296] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 07/09/2020] [Accepted: 07/26/2020] [Indexed: 06/11/2023]
Abstract
The degradation of benzene present in wastewater using hydrodynamic cavitation (HC) alone as well as in combination with air has been studied using nozzles as cavitating device of HC reactor. Initially, the energy efficiency of the HC reactor operated at different inlet pressures was determined using the calorimetric studies. Maximum energy efficiency of 53.4% was obtained at an inlet pressure of 3.9 bar. The treatment processes were compared under adiabatic as well as isothermal conditions and it was observed that under the adiabatic condition, the extent of degradation is higher as compared to isothermal condition. Studies related to the understanding the effect of inlet pressure (range of 1.8-3.9 bar) revealed that the maximum degradation as 98.9% was obtained at 2.4 bar pressure using the individual operation of HC under adiabatic conditions and in 70 min of treatment. The combination of HC with air was investigated at different air flow rates with best results for maximum degradation of benzene achieved at air flow rate of 60 mL/sec. A novel approach of using cavitation for a limited fraction of total treatment time was also demonstrated to be beneficial in terms of the extent of degradation as well as energy requirements and cost of operation. Based on the cavitational intensity, the resonant radius of aggregates of cavitation bubbles was also determined for distilled water as well as for aqueous solution of benzene. Overall, significant benefits of using HC combined with air have been demonstrated for degradation of benzene along with fundamental understanding into cavitation effects.
Collapse
Affiliation(s)
- Pooja Thanekar
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 40019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 40019, India.
| | - Z Znak
- Institute of Chemistry and Technical University, Lviv Polytechnic National University, Bandera Str. Lviv 79013, Ukraine.
| | - Yu Sukhatskiy
- Institute of Chemistry and Technical University, Lviv Polytechnic National University, Bandera Str. Lviv 79013, Ukraine
| | - R Mnykh
- Institute of Chemistry and Technical University, Lviv Polytechnic National University, Bandera Str. Lviv 79013, Ukraine
| |
Collapse
|
44
|
Sabnis SS, Raikar R, Gogate PR. Evaluation of different cavitational reactors for size reduction of DADPS. Ultrason Sonochem 2020; 69:105276. [PMID: 32739733 DOI: 10.1016/j.ultsonch.2020.105276] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 06/25/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
The present study deals with the size reduction based on the recrystallization (antisolvent approach using water) of 3,3'-Diamino Diphenyl Sulfone (DADPS) using different types of cavitational reactors as an alternative to the conventional process of mechanical size reduction, which is an energy intensive approach. Ultrasound was applied for fixed time specific to the reactors namely ultrasonic probes at different power dissipation levels and also ultrasonic bath. A High Speed Homogenizer was also used at varying speeds of rotation to establishing the efficacy for size reduction. The processed sample was analysed for particle size and morphology using particle size analyser and optical microscopy respectively. The final yield of recrystallization was also determined. The power density in W/L and power intensity in W/m2 calculated for each equipment has been used to establish efficacy for size reduction since all devices had dissimilar configurations. Based on the studies of varying power intensity of the different US equipment, it was established that larger the power intensity and power density, smaller was the resultant final particle size after treatment for same time. Among the various ultrasonic devices used, Sonics VCX750 probe yielded the best size reduction of 85.47% when operated at 40% amplitude for 60 min for a volume of 200 ml. A High Speed Homogenizer used at 7000 rpm gave 92.35% of size reduction in 15 min operation and also demonstrated the best energy efficiency. The work has elucidated the comparison of different cavitational devices for size reduction for the first time and presented the best reactors and conditions for the desired size reduction.
Collapse
Affiliation(s)
- Sarvesh S Sabnis
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 40019, India
| | - Rakshit Raikar
- Chemical Engineering Department, Siddaganga Institute of Technology, Tumkur 572101, Karnataka, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 40019, India.
| |
Collapse
|
45
|
Banakar VV, Sabnis SS, Gogate PR, Raha A. Improvements in heat transfer in thermal desalination operation based on removal of salts using ultrasound pretreatment. Ultrason Sonochem 2020; 69:105251. [PMID: 32682312 DOI: 10.1016/j.ultsonch.2020.105251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 06/20/2020] [Accepted: 07/05/2020] [Indexed: 06/11/2023]
Abstract
Scaling is a major problem in the thermal desalination operation which is mainly attributed to the deposition of salts on the tube, thereby increasing the resistance to heat transfer. To reduce or prevent the formation of scale on heat transfer surfaces, treating desalination concentrates and precipitating sparingly soluble salts can be a promising method. In the present work, the effect of ultrasound pretreatment to the synthetically prepared sea water as desalination feed has been investigated with an objective of intensifying salt removal process and avoiding scale formation leading to better heat transfer rates. A lab scale double pipe heat exchanger setup was designed and operated under simulated conditions of the thermal desalination operation. Total operational volume of 2000 ml was used for all experiments with a fixed flow rate of 5 ml/s. To understand the process of scaling, synthetic seawater was prepared as per the ASTM D 1141-98 and was used for scale deposition experiments. The experiments conducted using untreated synthetic seawater confirmed substantial scaling and drop in the heat transfer coefficient from an initial value of 776 W/m2 K to 603 W/m2 K (about 22%) after 24 h operation as compared to deionized water. SEM-EDX analysis was performed to investigate the morphology and main components of the scale. Subsequently, synthetic seawater was treated with ultrasound under continuous flow condition for removal of salts responsible for scaling. It was demonstrated that pretreatment resulted into salt crystallization, after which, the crystals were separated and the filtered solution was passed through the heat exchanger to check the effects on heat transfer rate. It was confirmed that the heat transfer rate was found to be higher with a value of 797 W/m2 K. Overall an effective approach based on ultrasound to remove the scale forming components has been demonstrated with established best conditions as 70% amplitude for 30 min of irradiation at fixed frequency of 20 kHz and 50% duty cycle.
Collapse
Affiliation(s)
- Vikram V Banakar
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India
| | - Sarvesh S Sabnis
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400 019, India.
| | - Abhijit Raha
- Desalination Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| |
Collapse
|
46
|
More SB, Gogate PR, Waghmare JS. Application of structured triacylglycerols in food products for value addition. Heliyon 2020; 6:e05198. [PMID: 33088961 PMCID: PMC7566940 DOI: 10.1016/j.heliyon.2020.e05198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 08/23/2020] [Accepted: 10/06/2020] [Indexed: 12/05/2022] Open
Abstract
The present study aims to evaluate the suitability of structured triacylglycerol (ST) consisting of medium chain triacylglycerol (MCT) as low calorie and instant energy source in combination with essential fatty acids for formulations in different food products to add value to existing products. The study investigates the effect of presence of ST on the physicochemical and sensory properties of various food products such as mayonnaise enriched with ST synthesized from medium chain fatty acid (MCFA) and rice bran oil, cookies enriched with ST synthesized from MCFA and oleic acid rich moringa oil, energy bar with ST synthesized from MCFA and omega 3 enriched fish oil, as well as yogurt drink with ST synthesized from MCFA and omega 6 enriched flaxseed oil. The obtained results established the suitability of incorporation of ST in food products and comparison with standard market products revealed the validity of the products to sustain the demand with value addition. The oxidative stability studies of all the products in the presence of natural antioxidants from moringa leaves and pomegranate peel using the peroxide value test and rancimat analysis demonstrated similar stability to the standard marketed product. Application of plant wastes and residues in the form of leaves or peels as the likely sources for isolating bioactive compounds demonstrates potential of the sustainable approach also giving benefit of increasing the stability of the product. The study also points towards possible replacement option for synthetic carcinogenic antioxidants with natural antioxidants obtained from moringa leaves and pomegranate peel. The present work clearly demonstrates the effective use of structured triacylglycerols synthesized using green methodologies for creating unique health enriched food products with all worthy and green components.
Collapse
|
47
|
|
48
|
Daware GB, Gogate PR. Sonochemical degradation of 3-methylpyridine (3MP) intensified using combination with various oxidants. Ultrason Sonochem 2020; 67:105120. [PMID: 32278248 DOI: 10.1016/j.ultsonch.2020.105120] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
3-Methyl pyridine (3MP) is a toxic and hazardous organic compound having considerable negative impact on environment and living organisms. The objective of this work to report a novel treatment strategy based on sonochemical degradation of 3MP, in combination with oxidants such as hydrogen peroxide, Fenton's reagent, peroxymonosulphate (PMS), and potassium persulphate (KPS) as well as solar irradiations. A bath sonicator operating at 25 kHz frequency and rated power dissipation of 100 W was applied in the work to study different approaches with an objective to enhance the removal of 3MP in lesser time. Effect of operating parameters such as pH (over the range of 2-10), treatment time, temperature (25-55 °C) and ultrasonic power (25 W to 150 W) on the degradation has been studied and the best conditions were used in subsequent combination approaches. It was demonstrated that ultrasound in combination with PMS, ferrous sulphate (FeSO4) and solar irradiations (approach of US/PMS/FeSO4/solar irradiation) is the best treatment strategy yielding maximum degradation as 97.4% with highest cavitational yield as 1.920 × 10-4 mg/J and highest synergetic Index as 2.70. Kinetic analysis revealed that first order mechanism fitted well to all the approaches involving different combinations of ultrasound, oxidising agents and solar irradiation. Degradation products were also analysed that established the degradation mechanism as C2 and C3 ring cleavages forming 1, 4-dihydro3-methylpyridine followed by Levulinic acid as non -toxic main by-product. Overall the work clearly demonstrated an effective treatment approach involving combined sonication with oxidants for remediation of 3MP also providing insights on kinetics and mechanism of degradation.
Collapse
Affiliation(s)
- Gaurav B Daware
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India.
| |
Collapse
|
49
|
Lahiri S, Bhardwaj RL, Mandal D, Gogate PR. Intensified dissolution of uranium from graphite substrate using ultrasound. Ultrason Sonochem 2020; 65:105066. [PMID: 32213440 DOI: 10.1016/j.ultsonch.2020.105066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/18/2020] [Accepted: 03/10/2020] [Indexed: 06/10/2023]
Abstract
Decontamination of graphite structural elements and recovery of uranium is crucial for waste minimization and recycle of nuclear fuel elements. Feasibility of intensified dissolution of uranium-impregnated graphite substrate using ultrasound has been studied with objective of establishing the effect of operating parameters and the kinetics of sonocatalytic dissolution of uranium in nitric acid. The effect of operating frequency and acoustic intensity as well as the acid concentration and temperature on the dissolution of metal has been elucidated. It was observed that at lower acid concentrations (6 M-8 M), the dissolution ratio increases by 15% on increasing the bath temperature from 45 to 70 °C. At higher acid concentration (>10 M), the increase was only around 5-7% for a similar change in temperature. With 12 M HNO3, pitting was also observed on the graphite surface along with erosion due to high local reaction rates in the presence of ultrasound. For higher frequency of applied ultrasound, lower dissolution rate of uranium was observed though it also leads to high rates of erosion of the substrate. It was thus established that suitable optimization of frequency is required based on the nature of the substrate and the choice of recycling it. The dissolution rate was also demonstrated to increase with acoustic intensity till it reaches to the maximum at the observed optimum (1.2 W/cm2 at 33 kHz). Comparison with silent conditions revealed that enhanced rate was obtained due to the use of ultrasound under optimum conditions. The work has demonstrated the effective application of ultrasound for intensifying the extent of dissolution of metal.
Collapse
Affiliation(s)
- Sutanwi Lahiri
- Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai 400094, India.
| | - R L Bhardwaj
- Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - D Mandal
- Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai 400094, India; Alkali Material & Metal Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - P R Gogate
- Institute of Chemical Technology, Matunga, Mumbai 400019, India
| |
Collapse
|
50
|
Gogate PR, Thanekar PD, Oke AP. Strategies to improve biological oxidation of real wastewater using cavitation based pre-treatment approaches. Ultrason Sonochem 2020; 64:105016. [PMID: 32078910 DOI: 10.1016/j.ultsonch.2020.105016] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/29/2020] [Accepted: 02/08/2020] [Indexed: 06/10/2023]
Abstract
The present work demonstrates the effective application of pretreatment based on cavitation to improve biological oxidation of real municipal and industrial wastewater. The optimum pretreatment conditions based on ultrasonic cavitation for treatment of municipal wastewater were observed as power dissipation of 90 W, a duty cycle of 70% and H2O2 dosage of 0.2 g/L resulting in about 24.9% COD reduction. The use of modified sludge and ultrasonic pretreatment for biological oxidation resulted in significant reduction in treatment time (36 h) than the treatment time (60 h) required for biological oxidation using untreated sludge as inoculum. Also, significantly enhanced biodegradability index (BI) from 0.33 to 0.6 was achieved using pretreatment for biological oxidation process. For the treatment of real industrial wastewater, different pretreatment approaches based on hydrodynamic cavitation (HC) in combination with H2O2, ozone or Fenton were investigated. The pretreatment using best approach of HC + Fenton resulted in 44.2% of COD reduction in total whereas only 28.1% of COD reduction was achieved for the untreated effluent being applied in the biological oxidation. Overall, the present work demonstrated the effectiveness of the pretreatment based on cavitation for the improved treatment of municipal and industrial wastewaters.
Collapse
Affiliation(s)
- P R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India.
| | - P D Thanekar
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India
| | - A P Oke
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai 400019, India
| |
Collapse
|