Sonochemical degradation of pesticides in aqueous solution: investigation on the influence of operating parameters and degradation pathway – a systematic review

Pirsaheb, Meghdad; Moradi, Negin

doi:10.1039/c9ra11025a

Cited by 92 publications

(62 citation statements)

References 93 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Upon light absorption, the electrons in the valence band are excited to the conduction band, leaving a positive hole in the valance band [33]. The empty hole in the valence band and the electron in the conduction band can induce reduction or oxidation of the pesticide adsorbate [41], as illustrated in Figure 3b [31].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater

EL-Saeid

Alotaibi

Alshabanat

et al. 2021

Water

View full text Add to dashboard Cite

Pesticide residues are harmful to the environment and human and animal health even at low levels because of long-term bioaccumulation. In this study, photolysis was applied to treat three representative water samples: aqueous atrazine and dimethoate solutions as target pesticides, as well as wastewater and agriculture wastewater containing pesticide residue. It was performed using ultraviolet (UV) irradiation at two wavelengths (254 and 306 nm) with exposure times ranging from 2 to 12 h in the presence and absence of a photocatalyst to identify the optimal degradation conditions. Extraction and analyzation process were performed by the Quick Easy Cheap Effective Rugged Safe (QuEChERS) methods and gas chromatography–tandem mass spectrometry with triple quadrupole detector (GC–MSMS/TQD), respectively. Photodegradation increased with an increase in exposure time and the TiO2 catalyst was beneficial for degradation. Both selected irradiation wavelengths were effective, although the wavelength of λ = 306 nm was the most efficient.

show abstract

Section: Resultsmentioning

confidence: 99%

“…According to them, the separation of electrons (e-) and holes (h+) is enhanced by the catalyst molecules (TiO2), which help in producing •O2− and •OH radicals. [27]) and (b) photocatalysis process (the scheme is quoted from [31]).…”

Section: Resultsmentioning

confidence: 99%

Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater

EL-Saeid

Alotaibi

Alshabanat

et al. 2021

Water

View full text Add to dashboard Cite

show abstract

“…Due to the mixing at atomic level, there is formation of amorphous phase [36] of nanoparticles which can be later transformed into the crystalline phase by simple annealing or calcination at a relatively lower temperature [37,38]. The ultrasonic irradiation causes cavitation in an aqueous medium, which can generate a temperature of around 5000 • C and a pressure of over 1800 kPa, which enables many unusual chemical reactions to occur [39]. The cavitation is marked by the sequential events i.e., formation, growth and collapse of the microbubbles [40].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Amorphous Iron Oxide Nanoparticles by the Sonochemical Method and Their Application for the Remediation of Heavy Metals from Wastewater

et al. 2020

View full text Add to dashboard Cite

Nanoparticles have gained huge attention in the last decade due to their applications in electronics, medicine, and environmental clean-up. Iron oxide nanoparticles (IONPs) are widely used for the wastewater treatment due to their recyclable nature and easy manipulation by an external magnetic field. Here, in the present research work, iron oxide nanoparticles were synthesized by the sonochemical method by using precursors of ferrous sulfate and ferric chloride at 70 °C for one hour in an ultrasonicator. The synthesized iron oxide nanoparticles were characterized by diffraction light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), electron diffraction spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM) and vibrating sample magnetometer (VSM). The FTIR analysis exhibits characteristic absorption bands of IONPs at 400–800 cm−1, while the Raman spectra showed three characteristic bands at 273, 675, and 1379 cm−1 for the synthesized IONPs. The XRD data revealed three major intensity peaks at two theta, 33°, 35°, and 64° which indicated the presence of maghemite and magnetite phase. The size of the spherical shaped IONPs was varying from 9–70 nm with an average size of 38.9 nm while the size of cuboidal shaped particle size was in microns. The purity of the synthesized IONPs was confirmed by the EDS attached to the FESEM, which clearly show sharp peaks for Fe and O, while the magnetic behavior of the IONPs was confirmed by the VSM measurement and the magnetization was 2.43 emu/g. The batch adsorption study of lead (Pb) and chromium (Cr) from 20% fly ash aqueous solutions was carried out by using 0.6 mg/100 mL IONPs, which exhibited maximum removal efficiency i.e., 97.96% and 82.8% for Pb2+ and Cr ions, respectively. The fly ash are being used in making cements, tiles, bricks, bio fertilizers etc., where the presence of fly ash is undesired property which has to be either removed or will be brought up to the value of acceptable level in the fly ash. Therefore, the synthesized IONPs, can be applied in the elimination of heavy metals and other undesired elements from fly ash with a short period of time. Moreover, the IONPs that have been used as a nanoadsorbent can be recovered from the reaction mixture by applying an external magnetic field that can be recycled and reused. Therefore, this study can be effective in all the fly ash-based industries for elimination of the undesired elements, while recyclability and reusable nature of IONPs will make the whole adsorption or elimination process much economical.

show abstract

“…Similarly, an increase in ultrasonic power could also facilitate triterpenoids release because disrupting cell walls could liberate triterpenoids into solvents. Continuing increasing in ultrasonic power was mainly responsible for molecular degradation owing to the cavitation effect leading to low triterpenoids content [41] …”

Section: Resultsmentioning

confidence: 99%

The Application of Ethanolic Ultrasonication to Ameliorate the Triterpenoid Content Extracted from Vietnamese Ganoderma lucidum with the Examination by Gas Chromatography

Dat¹,

Viet

My³

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

In this study, to investigate the extraction of triterpenoids from the Vietnamese red G. lucidum by ultrasound‐assisted extraction (UAE) method using ethanol as a solvent, the determination of the four single factors influence on the triterpenoid content including liquid‐to‐solid ratio, extraction power, extraction temperature, and extraction time was carried out for the performance of experiments on simultaneous effects by Central Composite design. The results showed that based on ultraviolet‐visible spectroscopy analysis, the highest yield of triterpenoids could be achieved with value of 18.3751 mg/g under optimal extraction conditions including extraction time of 60 min, ultrasonic power of 360 W, liquid‐to‐solid ratio of 38 : 1 mL/g, and ultrasonic temperature of 48 °C. To determine the characteristics of the obtained extract, the Gas chromatography‐mass spectrometry, the Fourier‐transform infrared spectroscopy, scanning electron microscope, and the thermogravimetric analyzer were employed in this study. Besides, for antioxidant capacity evaluation, the DPPH free radical scavenging assay, H2O2 scavenging assay, and the ABTS radical cation decolorization assay were carried out whereas the anticancer evaluation results denoted the potential for anticancer agents of G. lucidum extract. Therefore, it could be concluded that UAE is a promising method for triterpenoid extraction with antioxidant properties.

show abstract

Sonochemical degradation of pesticides in aqueous solution: investigation on the influence of operating parameters and degradation pathway – a systematic review

Abstract: Along with the wide production, consumption and disposal of pesticides in the world, the concerns over their human and environmental health impacts are rapidly growing.

Cited by 92 publications

References 93 publications

Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater

Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater

Synthesis and Characterization of Amorphous Iron Oxide Nanoparticles by the Sonochemical Method and Their Application for the Remediation of Heavy Metals from Wastewater

The Application of Ethanolic Ultrasonication to Ameliorate the Triterpenoid Content Extracted from Vietnamese Ganoderma lucidum with the Examination by Gas Chromatography

Contact Info

Product

Resources

About