Applying of Chitosan-TiO2 Nanocomposites for Photocatalytic Degradation of Anthracene and Pyrene

In this work, chitosan-TiO2 nanocomposites (NСs CS-TiO2) were developed for the photocatalytic degradation of some representatives of polycyclic aromatic hydrocarbons (PAHs). TiO2 nanoparticles (NPs) were synthesized by laser ablation method and their sizes were determined by dynamic laser light scattering (DLLS). Anthracene and pyrene in micellar solution were used as representatives of PAHs. The effect of TiO2 in the composition of prepared nanocomposites on the photodegradation of PAHs in model environments under UV irradiation was studied. The method of solid-phase luminescence (SPL) was used to estimate the decrease in PAHs concentrations. Based on the results of the studies carried out, pseudo-first order photodegradation kinetics were plotted. The efficiency of using the nanocomposites for the photocatalytic degradation of anthracene and pyrene was proved.

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Effect of Microbes on the Adsorption of Naphthalene by Graphene Oxide

Journal of Nanoparticles ◽

10.1155/2015/816982 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 12

Author(s):

Xiaoyu Li ◽

Fengbo Li ◽

Lejin Fang

Keyword(s):

Graphene Oxide ◽

Aromatic Hydrocarbons ◽

Order Kinetic ◽

Ftir Analysis ◽

Freundlich Model ◽

First Order ◽

Order Kinetic Model ◽

Polycyclic Aromatic ◽

Pseudo Second Order ◽

Pseudo First Order

The adsorption of naphthalene on graphene oxide (GO) nanosheets in presence of Paecilomyces cateniannulatus (P. cateniannulatus) was conducted by the batch techniques. The morphology and nanostructure of GO were characterized by SEM, TEM, FTIR, XPS, and Raman. The adsorption kinetics indicated that the adsorption of naphthalene on GO and GO + P. catenlannulatus can be satisfactorily fitted pseudo-first-order and pseudo-second-order kinetic model, respectively. P. catenlannulatus inhibited the adsorption of naphthalene on GO at pH<4.0, whereas the increased adsorption was observed at pH>4.0. The adsorption of naphthalene on GO and GO + P. catenlannulatus can be better fitted by Langmuir and Freundlich model, respectively. The change in the conformation of GO was responsible to the increased adsorption of naphthalene by SEM and TEM images. According to FTIR analysis, naphthalene was absorbed by the oxygen-containing functional groups of GO, especially for –COOH. The finding in the study provides the implication for the preconcentration and removal of polycyclic aromatic hydrocarbons from environment cleanup applications.

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A traceless clean-up method coupled with gas chromatography and mass spectrometry for analyzing polycyclic aromatic hydrocarbons in complex plant leaf matrices

The Analyst ◽

10.1039/d0an00128g ◽

2020 ◽

Vol 145 (9) ◽

pp. 3266-3273

Author(s):

Xiangzi Jin ◽

Han Yeong Kaw ◽

Huijie Li ◽

Zhao Wang ◽

Jinhua Zhao ◽

...

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

Polycyclic Aromatic Hydrocarbons ◽

Aromatic Hydrocarbons ◽

Solid Phase ◽

Phase Extraction ◽

Plant Leaves ◽

Gas Purge ◽

Polycyclic Aromatic

This study developed a traceless clean-up method by combining solid phase extraction (SPE) with gas purge–microsyringe extraction (GP–MSE) to purify sample extracts for the determination of polycyclic aromatic hydrocarbons (PAHs) in plant leaves.

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