Oxidative degradation of polycyclic aromatic hydrocarbons in contaminated industrial soil using chlorine dioxide

2020 ◽  
Vol 394 ◽  
pp. 124857 ◽  
Author(s):  
Yuan Sun ◽  
Wen-Ke Niu ◽  
Xiao-Jun Hu ◽  
Xiao-Hong Ma ◽  
Yu-Jia Sun ◽  
...  
2019 ◽  
Vol 16 (7) ◽  
pp. 517
Author(s):  
Flavia De Nicola ◽  
Estefanía Concha-Graña ◽  
Enrica Picariello ◽  
Valeria Memoli ◽  
Giulia Maisto ◽  
...  

Environmental contextPolycyclic aromatic hydrocarbons (PAHs) are widespread organic pollutants that tend to accumulate in soil. We developed an environmentally friendly analytical method for PAHs to evaluate human health risks associated with their presence in soils. The method is feasible for the analysis of soils with widely varying PAH contamination levels, and is well suited to environmental monitoring studies of relevance to human health. AbstractA microwave-assisted extraction, with a dispersive solid-phase purification step followed by programmed temperature vaporisation–gas chromatography–tandem mass spectrometry, is proposed as an environmentally friendly, simple and cheap analytical method for polycyclic aromatic hydrocarbons (PAHs) in soil. Different extraction and clean-up operating variables were tested to achieve satisfactory analytical performances: trueness from 92 to 114%, limit of quantification (LOQ) from 0.4 to 2µgkg−1 for most PAHs and intermediate precision, calculated as relative standard deviation (RSD), below 10%. The method was validated using both Certified Reference Material and real soil samples collected at sites subjected to different human activities. PAH contents ranged from 0.11 (in holm oak forest soil) to 1mgkg−1 d.w. (in an industrial soil) according to the anthropic gradient. The soil PAH contents measured were used to estimate the risk to human health, which suggested the exposure to the PAHs in soil as a potential risk for human health, especially at the industrial site. The feasibility of the method for soils with different PAH contamination degrees makes it relevant in monitoring programs.


2004 ◽  
pp. 93-100 ◽  
Author(s):  
Mira Pucarevic ◽  
Petar Sekulic

The paper deals with several groups of compounds that represent the most frequent pollutants of soil in the world. The paper also reviews results of long-term studies conducted at the Institute of Field and Vegetable Crops in Novi Sad on the residues of pesticides and polycyclic aromatic hydrocarbons (PAHs) in the soil of the Vojvodina Province. The analyzed samples have been found to contain residues of persistent pesticides and their metabolites lindane and its metabolites 6,20 ?g/kg, alachlor 3,56 ?g/kg, aldrin 2,3 ?g/kg, heptachlor epoxide 0,99 ?g/kg, chlordane 3,82 ?g/kg, DDT and its metabolites 10,77 ?g/kg, dieldrin 2,04 ?g/kg, endrin 3,57 ?g/kg and endrin aldehyde 1,36 ?g/kg. Soil samples from Novi Sad municipality contained 53,69 ?g/kg of DDT and its metabolites. The values of atrazine ranged from 0,0005 to 0,8 mg/kg. The values of PAHs were 6,64 mg/kg in industrial soil, 4,93 mg/kg in agricultural soil, and 4,55 mg/kg and 5,48 mg/kg in the Novi Sad municipality. The lowest value, 0.83 mg/kg, was found for nonagricultural/nonindustrial soils.


2012 ◽  
Vol 587 ◽  
pp. 111-115 ◽  
Author(s):  
Salina Alias ◽  
Megawati Omar ◽  
Noor Hana Hussain ◽  
Suhaimi Abdul-Talib

The removal of polycyclic aromatic hydrocarbons (PAHs) from contaminated soil through oxidative degradation by zero valent iron (ZVI) has been investigated in this study. The results showed a fast decrease of PAHs within the first 30 minutes of treatment followed by a slow degradation. The degradation rates coefficient (k) of PAHs analysed using pseudo first-order rate model showed the rate of reaction increased with the increase of ZVI concentrations from 0.003 min-1 at 1% ZVI concentration to 0.011 min-1 at 3% ZVI. However, the normalized surface area constant (kSA) decreased when the ZVI dosage above 3% was applied.


2019 ◽  
Vol 64 (1) ◽  
pp. 55-67
Author(s):  
Vlad Pӑnescu ◽  
◽  
Mihaela Cӑtӑlina Herghelegiu ◽  
Sorin Pop ◽  
Mircea Anton ◽  
...  

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