scholarly journals PHOTOLYSIS OF FLUORENE AND 9-FLUORENONE A TOXIC ENVIRONMENTAL CONTAMINANT: STUDIES IN THE EFFECT OF SOLVENT AND INTENSITY OF THE SOURCE

2020 ◽  
Vol 4 (12) ◽  
pp. 55-59
Author(s):  
Rekha Nagwanshi ◽  
Dr. Jeeven Singh Solanki ◽  
Sandhya Bageriab ◽  
Shubha Jain
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Uv Light ◽  
Environmental Contaminant ◽  
Effect Of Solvent ◽  
Polycyclic Aromatic ◽  
Effect Of Light

Polycyclic aromatic hydrocarbons (PAHs) are a class of genotoxic environmentalcontaminants and are always exposed to solar radiations. Fluorenes are important PAHswidely distributed in nature and hence the studies in the effect of light on them are of ulmostsignificance. Therefore in this paper, we have studied the photo irradiations of fluorene (1)and 9-fluorenone (2) with UV light in different solvents, which results in the formation ofdifferent products.

Removal of polycyclic aromatic hydrocarbons from municipal sludge using UV light

2012 ◽  
Vol 44 (1-3) ◽  
pp. 324-333 ◽  
Author(s):  
Nezih Kamil Salihoglu ◽  
Gizem Karaca ◽  
Güray Salihoglu ◽  
Yücel Tasdemir
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Uv Light ◽  
Municipal Sludge ◽  
Polycyclic Aromatic

scholarly journals Spectroscopic Properties of Polycyclic Aromatic Hydrocarbons: Effect of Solvent Polarity on the Fluorescence Emission Behavior of Select Fluoranthene, Fluorenochrysene, Indenochrysene, and Indenopyrene Derivatives

1991 ◽  
Vol 45 (10) ◽  
pp. 1699-1705 ◽  
Author(s):  
Sheryl A. Tucker ◽  
William E. Acree ◽  
Bongsup P. Cho ◽  
Ronald G. Harvey ◽  
John C. Fetzer
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fluorescence Emission ◽  
Solvent Polarity ◽  
Spectroscopic Properties ◽  
Effect Of Solvent ◽  
Polycyclic Aromatic ◽  
Organic Nonelectrolyte ◽  
Emission Behavior ◽  
Intensity Ratios

Fluorescence emission behavior is reported for benz[def]indeno-[1,2,3hi]chrysene, fluoreno[2,3,4,9defg]chrysene, benz[def]indeno-[l,2,3qr]chrysene, dibenzo[a,e]fluoranthene, indeno[1,2,3cd]pyrene, naphtho[1,2b]fluoranthene, benzo[b]fluoranthene, fluoranthene, benzo-[ghi]fluoranthene, naphtho[2,1a]fluoranthene, naphtho[2,3b]fiuoranthene, benzo[k]fluoranthene, and benzo[j]fluoranthene dissolved in organic nonelectrolyte solvents of varying polarity. Results of these measurements are used to classify the various solutes as either probe or nonprobe molecules, depending upon whether measured emission intensity ratios vary systematically with solvent polarity. Also discussed are primary and secondary inner-filtering artifacts associated with selective quenching agents used to help identify/analyze polycyclic aromatic hydrocarbons (PAHs) in unknown mixtures. Inner-filtering artifacts are illustrated by examining fluorescence emission intensities of 13 “nonalternant” PAHs at different nitromethane concentrations and solution absorbances.

Effect of UV Intensity and Wavelengh on Photocatalytic Degradation of Polycyclic Aromatic Hydrocarbons

2011 ◽  
Vol 233-235 ◽  
pp. 466-469
Author(s):  
Li Hong Zhang ◽  
Cheng Bin Xu ◽  
Zhong Lin Chen ◽  
Xue Mei Li
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Photocatalytic Degradation ◽  
Light Source ◽  
Uv Irradiation ◽  
Aromatic Hydrocarbons ◽  
Uv Light ◽  
Irradiation Intensity ◽  
Degradation Rates ◽  
Polycyclic Aromatic

The photocatalytic degradation of pyrene (PYRE) and benzo[a]pyrene (BaP) on soil surfaces in the presence of Fe2O3 using ultraviolet (UV) light source was investigated in a photo chamber, in which the temperature was maintained 30 . The effects of UV irradiation intensity and UV wavelength on the degradation performance of polycyclic aromatic hydrocarbons (PAHs) were studied. The results show that with the intensity of UV irradiation being enhanced, the photocatalytic degradation rates of PAHs were increased. Photocatalytic degradation rates of PYRE and BaP on soil surfaces with 5% Fe2O3 were different at UV irradiation wavelengths of 254, 310 and 365 nm, respectively.

Photocatalytic Degradation of Polycyclic Aromatic Hydrocarbons on Soil Surfaces Using Fe2O3 under UV Light

2011 ◽  
Vol 189-193 ◽  
pp. 420-423 ◽  
Author(s):  
Li Hong Zhang ◽  
Nan Jia ◽  
Cheng Bin Xu ◽  
Xue Mei Li
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Humic Acid ◽  
Photocatalytic Degradation ◽  
Aromatic Hydrocarbons ◽  
Uv Light ◽  
First Order Kinetics ◽  
Degradation Rates ◽  
Polycyclic Aromatic ◽  
Alkaline Conditions ◽  
Neutral Conditions

The photocatalytic degradation of phenanthrene (PHE), pyrene (PYRE) and benzo[a]pyrene (BaP) on soil surfaces in the presence of Fe2O3 using ultraviolet (UV) light source was investigated. The effects of various factors, namely Fe2O3, soil pH, and humic acid, on the degradation performance of polycyclic aromatic hydrocarbons (PAHs) were studied. The results show that photocatalytic degradation of PAHs follows the pseudo-first-order kinetics. Catalyst Fe2O3 accelerated the photodegradation of PHE, PYRE and BaP significantly. In acidic or alkaline conditions, the photocatalytic degradation rates of the PAHs were greater than those in neutral conditions. Humic acid significantly enhanced the PAH photocatalytic degradation by sensitizing radicals capable of oxidizing PAHs.

Sign in / Sign up

Export Citation Format

Share Document