Application of advanced materials in sonophotocatalytic processes for the remediation of environmental pollutants

Theerthagiri, Jayaraman; Lee, Seung Jun; Karuppasamy, K.; Arulmani, S.; Veeralakshmi, Selvakumar; Ashokkumar, Muthupandian; Choi, Myong Yong

doi:10.1016/j.jhazmat.2021.125245

Cited by 283 publications

(86 citation statements)

References 137 publications

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“…Purification and characterization of enzymes are useful to analyze the functional properties ( Bizuye et al, 2014 ). In recent years, novel molecules have been isolated and characterized from various sources for several pharmaceutical and environmental applications ( Theerthagiri et al, 2021 , Ramu et al, 2020 , Theerthagiri et al, 2019 , Arasu et al, 2019 ). The present investigation was aimed on the analysis of novel fibrinolytic enzyme producing organism from the fermented food.…”

Section: Introductionmentioning

confidence: 99%

In vitro fibrinolytic activity of an enzyme purified from Bacillus amyloliquefaciens strain KJ10 isolated from soybean paste

Rajaselvam

Benit²,

Alotaibi³

et al. 2021

Saudi Journal of Biological Sciences

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A fibrinolytic protease secreting producing Bacillus amyloliquefaciens strain KJ10 was initially screened from the fermented soybean. Maximum productivity was obtained in the culture medium after 40 h incubation, 34 °C incubation temperature at pH 8.0. Fibrinolytic protease production was enhanced in the culture medium with 1% sucrose (3712 ± 52 U/mL), 1% (w/v) yeast extract (3940 ± 28 U/mL) and 0.1% MgSO 4 (3687 ± 38 U/mL). Enzyme was purified up to 22.9-fold with 26%recovery after Q-Sepharose HP column chromatography. After three steps purification, enzyme activity was 1606U/mg and SDS-PAGE analysis revealed 29 kDa protein and enzyme band was detected by zymograpy. Enzyme was highly active at pH 8.0, at wide temperature ranges (40 °C − 55 °C) and was activated by Mn 2+ (102 ± 3.1%) and Mg 2+ (101.4 ± 2.9%) ions. The purified fibrinolytic enzyme was highly specific against N-Suc-Ala-Ala-Pro-Phe- p NA (189 mmol/min/mL) and clot lytic activity reached 28 ± 1.8% within 60 min in vitro . The purified fibrinolytic enzyme showed least erythrocytic lysis activity confirmed safety to prevent various health risks, including hemolytic anemia. Based on this study, administration of fibrinolytic enzyme from B. amyloliquefaciens strain KJ10 is safe for clinical applications.

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Section: Introductionmentioning

confidence: 99%

In vitro fibrinolytic activity of an enzyme purified from Bacillus amyloliquefaciens strain KJ10 isolated from soybean paste

Rajaselvam

Benit²,

Alotaibi³

et al. 2021

Saudi Journal of Biological Sciences

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“…The intensity of luminescence emitted by bacteria after a t = 15 or 30 min of contact with the control solution (MilliQ water and NaCl) is LU 0 (t); while the initial intensity of bacteria luminescence before the addition of the control solution is LU 0 (0). Equation (10) then depicts the corrected inhibition rate attributed to the toxicity of the sample:…”

Section: Toxicity Testsmentioning

confidence: 99%

“…Tetracycline and its degradation products were analyzed by high-performance liquid chromatography coupled to mass spectrometry (HPLC-MS) with instruments and similar setting as reported in our previous work [10] as follows: HPLC was performed with a Waters 2695 pump, auto sampler with a 20 µL loop, a Waters 2695 separation module (HPLC), a Waters Micromass (Wythenshawe, Manchester, UK) and a Quattro Micro mass spectrometer equipped with electrospray ionization (ESI). For HPLC, Waters-XSelect HSST3 100 mm × 2.1 mm, 2.5 µm particles size with column temperature set at 25 • C was used.…”

Section: Tetracycline and By-product Analysismentioning

confidence: 99%

“…Tetracycline cannot be efficiently removed by biological treatments and techniques such as membrane filtration and adsorption do not break down the tetracycline but only transfers it from one phase to another [5]. Techniques such as advanced oxidation, namely photocatalysis, ozonation, ultrasound, sonoelectrochemistry, and various combinations of advanced technologies such as ultrasound with photocatalysis have been reported as alternative water treatment approaches to the elimination of tetracycline and other recalcitrant organic compounds in wastewater [1,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Combined Electro-Fenton and Anodic Oxidation Processes at a Sub-Stoichiometric Titanium Oxide (Ti4O7) Ceramic Electrode for the Degradation of Tetracycline in Water

Zwane

Orimolade

Koiki

et al. 2021

Water

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The mineralization of tetracycline by electrochemical advanced oxidation processes (EAOPs) as well as the study of the toxicity of its intermediates and degradation products are presented. Electro-Fenton (EF), anodic oxidation (AO), and electro-Fenton coupled with anodic oxidation (EF/AO) were used to degrade tetracycline on carbon felt (cathode) and a sub-stoichiometric titanium oxide (Ti4O7) layer deposited on Ti (anode). As compared to EF and AO, the coupled EF/AO system resulted in the highest pollutant removal efficiencies: total organic carbon removal was 69 ± 1% and 68 ± 1%, at 20 ppm and 50 ppm of initial concentration of tetracycline, respectively. The effect of electrolysis current on removal efficiency, mineralization current efficiency, energy consumption, and solution toxicity of tetracycline mineralization were investigated for 20 ppm and 50 ppm tetracycline. The EF/AO process using a Ti4O7 anode and CF cathode provides low energy and high removal efficiency of tetracycline caused by the production of hydroxyl radicals both at the surface of the non-active Ti4O7 electrode and in solution by the electro-Fenton process at the cathodic carbon felt. Complete removal of tetracycline was observed from HPLC data after 30 min at optimized conditions of 120 mA and 210 mA for 20 ppm and 50 ppm tetracycline concentrations. Degradation products were elucidated, and the toxicity of the products were measured with luminescence using Microtox® bacteria toxicity test.

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“…The alternative US-based advanced oxidation processes (AOPs), as the promising and friendly treatment technologies with physicochemical processes of cavitation (gas-phase reaction zone effective temperature, ≈ 5200 K, and high pressure, in the range of hundreds of bars), pyrolysis (breaking chemical bonds, and yielding hydroxyl radicals (Eq. (1) ) [4] ), supercritical water oxidation (depth and temperature of the liquid-phase reaction zone, ≈ 0.2 μm and ≈ 1900 K, respectively), and violent turbulence [5] , [6] ; meanwhile, especially as the sono-catalysis technologies to activate oxidizing agents to produce active species to form combined system [5] , [6] , [7] , have attracted particular concern for environmental remediation. Herein, as a kind of oxidizing agent, persulfate (involving peroxymonosulfate (HSO 5 − , PMS) or peroxydisulfate (S 2 O 8 2− , PDS)) with direct oxidizing or producing SO 4 • − (E 0 (SO 4 • − /SO 4 2− ) = 2.60 – 3.10 V NHE ) by activation to improve the oxidizing capacity [8] via physicochemical means (e.g.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic role to activate persulfate/chlorite with foamed zero-valent-iron: Sonochemical applications and induced mechanisms

Zhang

Leng

et al. 2021

Ultrasonics Sonochemistry

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Highlights The novel foamed-ZVI activating persulfate/chlorite by ultrasonic was applied. The real-time and online continuous detections tracked radicals transformation. The EPR spectra with different systems in different mixtures were detected. The free or non-free radicals processes induced by US were explored. The dynamics on cavitation and the US-field simulation were presented.

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Application of advanced materials in sonophotocatalytic processes for the remediation of environmental pollutants

Cited by 283 publications

References 137 publications

In vitro fibrinolytic activity of an enzyme purified from Bacillus amyloliquefaciens strain KJ10 isolated from soybean paste

In vitro fibrinolytic activity of an enzyme purified from Bacillus amyloliquefaciens strain KJ10 isolated from soybean paste

Combined Electro-Fenton and Anodic Oxidation Processes at a Sub-Stoichiometric Titanium Oxide (Ti4O7) Ceramic Electrode for the Degradation of Tetracycline in Water

Ultrasonic role to activate persulfate/chlorite with foamed zero-valent-iron: Sonochemical applications and induced mechanisms

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