Design a new photocatalyst of sea sediment/titanate to remove cephalexin antibiotic from aqueous media in the presence of sonication/ultraviolet/hydrogen peroxide: Pathway and mechanism for degradation

Tavasol, Fatemeh; Tabatabaie, Taybeh; Ramavandi, Bahman; Amiri, Fazel

doi:10.1016/j.ultsonch.2020.105062

Cited by 44 publications

(13 citation statements)

References 55 publications

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“…The maximum PhP removal of 90.14 % was obtained by the process from the desired operating conditions and after a period of 20 min of treatment. Sediment/sea titanate photocatalysts were produced as a promising alternative for attenuation of cephalexin from aqueous solutions in ultrasonic waves 100. According to the results obtained, 94.7 % of the drug was degraded in nanoparticles of the photocalizer.…”

Section: Basic Principles Of Sonochemistrymentioning

confidence: 99%

Ultrasound as an Advanced Oxidative Process: A Review on Treating Pharmaceutical Compounds

2021

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Ultrasound treatment, among the various existing water and effluent treatment techniques, is considered an emerging method in recent years due to the degradation of complex organic and inorganic contaminants. It offers substantial advantages, such as cleanliness, safety, and minor or non‐existent secondary pollution products, when compared to other advanced oxidation processes (AOPs). A systematic review of the published peer‐reviewed literature relating the use of ultrasound as an AOP is provided based on theoretical concepts and factors that influence sonochemical reactions. The synergistic effects of ultrasound with other degradation technologies for the oxidation of medications are investigated and the importance of assessing toxicity and biodegradability for the treatment of water and effluents with emerging pollutants is evaluated. The mechanistic understanding of the sonochemical effects in drugs, classification of intermediates, and the development of new treatment technologies are still the subject of future research, however, the synergy of treatments and cavitation studies must be considered.

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Section: Basic Principles Of Sonochemistrymentioning

confidence: 99%

Ultrasound as an Advanced Oxidative Process: A Review on Treating Pharmaceutical Compounds

2021

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“…4 Presently, great efforts have been devoted to seeking efficient heterogeneous Fenton or Fenton-like catalysts, for example, iron sulfides, 5 iron oxides, 6 manganese oxides, 7 and such similar composites. [8][9][10][11] However, the synthesis of these catalysts always required complicated procedures with chemical/energy consumption, whereas natural iron-bearing clays, [12][13][14][15] for example, sediments of minerals as montmorillonite, nontronite from oceans, rivers, and groundwater are of great abundance, and ought to have great potential in Fenton reactions or AOPs. Ausavasukhi et al 13 prepared Fenton catalysts containing Fe-species by the simple thermal treatment and re-swelling of natural Fe-containing clays for the degradation of methylene blue (MB) and phenol.…”

Section: Introductionmentioning

confidence: 99%

Deep‐sea clays using as active Fenton catalysts for self‐propelled motors

et al. 2022

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Raw deep-sea clays (i.e., pelagic clays) collected from the Indian Ocean were able to function as Fenton catalysts and self-propelled micromotors due to the high content of Fe-and Mn-. The pelagic clays were for the first time observed to be automatic in the H 2 O 2 solution. The pelagic clays existed in the form of poorly crystallized marine sedimentation. The major minerals were found as illite/montmorillonite (I/M) and amorphous ferromanganese nodules, and the minor minerals included kaolinite, quartz, feldspar, and calcite. Significant amounts of oxygen bubbles were generated when the clay particles were dispersed into the H 2 O 2 solution (0.1-10.0 wt.%), and the average velocity of the motors was observed as high as 183.0 μm s -1 in 10.0 wt.% H 2 O 2 . The selfpropulsion would induce vigorous mixing in local areas of the solution and was confirmed to benefit the catalytic performance. The clays were employed to remove Rhodamine B (RhB) for a proof-of-concept study. In the acid solution (pH = 1.0-5.0), the removal of RhB was controlled by the Fenton process accompanied by the adsorption of clay particles. In the alkaline solution (pH = 9.0), the removal of RhB was found to follow an adsorptive bubble separation pathway. Both processes were greatly influenced by the self-motion of MnO x motors contained in the pelagic clays.

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“…Advanced oxidation processes have been used successfully for CPX removal, but these processes have a number of disadvantages, such as the generation of more toxic degradation products and high operating costs [ 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Saccharomyces cerevisiae/Calcium Alginate Composite Beads for Cephalexin Antibiotic Biosorption from Aqueous Solutions

et al. 2021

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Cephalexin (CPX) is recognized as a water pollutant, and it has been listed in a number of countries with a risk factor greater than one. Herein, the present work focused on the synthesis, characterization and biosorption capacity evaluation of Saccharomyces cerevisiae immobilized in calcium alginate as a biosorbent to remove CPX from aqueous solutions. Biosorbent was characterized by SEM and FTIR techniques. Batch biosorption experiments were conducted in order to evaluate the effect of the initial pH, biosorbent dose and CPX initial concentration. The removal efficiency, in considered optimal conditions (pH = 4, CPX initial concentration = 30 mg/L, biosorbent dose = 1 g/L) was 86.23%. CPX biosorption was found to follow the pseudo–second-order kinetics. The equilibrium biosorption data were a good fit for the Langmuir model with correlation coefficient of 0.9814 and maximum biosorption capacity was 94.34 mg/g. This study showed that the synthesized biosorbent by immobilization technique is a low-cost one, easy to obtain and handle, eco-friendly, with high feasibility to remove CPX antibiotic from aqueous solution. The findings of this study indicate that the biosorbents based on microorganisms immobilized on natural polymers have the potential to be applied in the treatment of wastewater.

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Design a new photocatalyst of sea sediment/titanate to remove cephalexin antibiotic from aqueous media in the presence of sonication/ultraviolet/hydrogen peroxide: Pathway and mechanism for degradation

Cited by 44 publications

References 55 publications

Ultrasound as an Advanced Oxidative Process: A Review on Treating Pharmaceutical Compounds

Ultrasound as an Advanced Oxidative Process: A Review on Treating Pharmaceutical Compounds

Deep‐sea clays using as active Fenton catalysts for self‐propelled motors

Application of Saccharomyces cerevisiae/Calcium Alginate Composite Beads for Cephalexin Antibiotic Biosorption from Aqueous Solutions

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