Photodegradation fates of cis-chlordane, trans-chlordane, and heptachlor in ethanol

Yamada, Shingo; Naito, Yuta; Funakawa, Masafumi; Nakai, Satoshi; Hosomi, Masaaki

doi:10.1016/j.chemosphere.2007.07.054

Cited by 29 publications

(8 citation statements)

References 15 publications

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“…However, several studies support the degradation of aldrin. Shoiful et al [13] show that, in the absence of sunlight, aldrin degradation occurs after 12 hours and that this process is strongly influenced by the dissociation energy of C-Cl bonding within the structure [36]. e degradation products of aldrin have not been identified experimentally as of yet.…”

Section: Model Equation Settingsmentioning

confidence: 99%

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Nanoparticle Beads of Chitosan-Ethylene Glycol Diglycidyl Ether/Fe for the Removal of Aldrin

Rosales

Ávila-Pérez

Reza-García

et al. 2021

Journal of Chemistry

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This article reports on the preparation of iron nanoparticles (FeNPs) supported in chitosan beads (Chi-EDGE-Fe) for removing aldrin from aqueous solutions. The FeNPs and Chi-EDGE-Fe beads were characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and the Mössbauer spectroscopy (MS) techniques. TEM, XRD, and MS showed that the FeNPs had core-shell structures consisting of a core of either Fe0 or Fe2B and a shell of magnetite. Furthermore, SEM images showed that Chi-EDGE-Fe beads were spherical with irregular surfaces and certain degrees of roughness and porosity, whilst the sorbent mean pore size was 204 nm, and the occluded iron nanoparticles in the chitosan material had diameters of 70 nm and formed agglomerates. The sorbent beads consisted of carbon, oxygen, chlorine, aluminum, silicon, and iron according to the SEM-EDS analysis. Functional groups such as O-H, C-H, -CH2, N-H, C-O, C-OH, and Fe-OH were detected in the FTIR spectra. In addition, a characteristic band appeared at about 1700 cm−1 after the sorption process involving aldrin. MS also showed that the iron nanoparticles in the beads probably oxidized into NPs of α-Fe2O3 as a result of the supporting process. The isotherm of the aldrin removal followed the Langmuir–Freundlich model and presented a maximum adsorption capacity of 74.84 mg/g, demonstrating that chitosan-Fe beads are promising sorbents for the removal of toxic pollutants in aqueous solutions.

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Section: Model Equation Settingsmentioning

confidence: 99%

“…According to Yamada [36], in this process, the H + plays an important role in the dissociation of magnetite and reduction of aldrin. In this particular case, this mechanism is ruled out due to the absence of magnetite.…”

Section: Model Equation Settingsmentioning

confidence: 99%

Nanoparticle Beads of Chitosan-Ethylene Glycol Diglycidyl Ether/Fe for the Removal of Aldrin

Rosales

Ávila-Pérez

Reza-García

et al. 2021

Journal of Chemistry

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“…The bimetallic nanoparticle approach offers a more cost‐effective alternative to bioremediation of POPs, which requires the growth of special bacteria as well as special environmental conditions for the remediation process to take place; however, the bioremediation of POPs is still an incomplete process (Varjani, Gnansounou, & Pandey, ). It also provides a superior alternative to other remediation techniques such as photochemical and adsorption (Yamada, Naito, Funakawa, Nakai, & Hosomi, ).…”

Section: Introductionmentioning

confidence: 99%

Effect of mixing on reductive dechlorination of persistent organic pollutants by Fe/Pd nanoparticles

Moujahid

Bang

Yan

2019

Water Environment Research

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Herein, we report the comparison of two different mixing methods for reductive dechlorination of gamma‐hexachlorocyclohexane (γ‐HCH), aldrin, and p, p’‐dichlorodiphenyl‐trichloroethane (p, p’‐DDT), using iron/palladium (Fe/Pd) bimetallic nanoparticles. A noticeable enhancement of the reaction rate was found when the reductive dechlorination reaction was carried out in an ultrasound bath as compared with a platform shaker. These enhancements could be attributed to (a) the continuous cleaning and chemical activation of the surfaces of nanoscale Fe/Pd bimetallic nanoparticles by the combined chemical and physical effects of acoustic cavitation; and (b) the accelerated mass transport rates of target POPs to the surfaces of the Fe/Pd nanoparticles. Finally, the degradation intermediates and final products were determined by gas chromatography/mass spectrometry (GC/MS) analysis and the plausible degradation pathways for γ‐HCH, aldrin, and p, p’‐DDT by Fe/Pd bimetallic nanoparticles were proposed. Practitioner points Exposure to POPs is a resilient global environmental and health issue. Fe/Pd bimetallic nanoparticles demonstrated > 90 % removal of POPs in the first 30 minutes of the reaction via ultrasonic mixing. GC‐MS analyses provided verification of POPs degradation intermediates and final products.

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“…The main objective of this work was therefore to develop a method to simultaneously regenerate the polymers and destroy the pollutants. UV irradiation was used for this purpose as photodegradation in organic solvent has proven successful for the destruction of various organic pollutants [17][18][19][20] including estrogens [21]. Polymers loaded with pollutants were irradiated directly during solvent extraction in order to (1) polymers to the solvent by maintaining a low pollutant level in the solvent and (2) regenerate both the solvent and the polymers for reuse.…”

Section: Introductionmentioning

confidence: 99%

Removal and destruction of endocrine disrupting contaminants by adsorption with molecularly imprinted polymers followed by simultaneous extraction and phototreatment

Fernández-Álvarez

Noir

Guieysse

2009

Journal of Hazardous Materials

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Photodegradation fates of cis-chlordane, trans-chlordane, and heptachlor in ethanol

Cited by 29 publications

References 15 publications

Nanoparticle Beads of Chitosan-Ethylene Glycol Diglycidyl Ether/Fe for the Removal of Aldrin

Nanoparticle Beads of Chitosan-Ethylene Glycol Diglycidyl Ether/Fe for the Removal of Aldrin

Effect of mixing on reductive dechlorination of persistent organic pollutants by Fe/Pd nanoparticles

Removal and destruction of endocrine disrupting contaminants by adsorption with molecularly imprinted polymers followed by simultaneous extraction and phototreatment

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