Removal of some polycyclic aromatic hydrocarbons from petrochemical wastewater using low-cost adsorbents of natural origin

2008 ◽  
Vol 99 (10) ◽  
pp. 4515-4519 ◽  
Author(s):  
Rudy Crisafully ◽  
Maria Aparecida L. Milhome ◽  
Rivelino M. Cavalcante ◽  
Edilberto R. Silveira ◽  
Denis De Keukeleire ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Low Cost ◽  
Petrochemical Wastewater ◽  
Natural Origin ◽  
Polycyclic Aromatic

scholarly journals Bioremediation of PAH-Contaminated Soils: Process Enhancement through Composting/Compost

2020 ◽  
Vol 10 (11) ◽  
pp. 3684 ◽  
Author(s):  
Tahseen Sayara ◽  
Antoni Sánchez
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Contaminated Soils ◽  
Low Cost ◽  
Polluted Soil ◽  
Ex Situ ◽  
Chemical Structures ◽  
Hydrophobic Chemical ◽  
Polycyclic Aromatic ◽  
The Stability

Bioremediation of contaminated soils has gained increasing interest in recent years as a low-cost and environmentally friendly technology to clean soils polluted with anthropogenic contaminants. However, some organic pollutants in soil have a low biodegradability or are not bioavailable, which hampers the use of bioremediation for their removal. This is the case of polycyclic aromatic hydrocarbons (PAHs), which normally are stable and hydrophobic chemical structures. In this review, several approaches for the decontamination of PAH-polluted soil are presented and discussed in detail. The use of compost as biostimulation- and bioaugmentation-coupled technologies are described in detail, and some parameters, such as the stability of compost, deserve special attention to obtain better results. Composting as an ex situ technology, with the use of some specific products like surfactants, is also discussed. In summary, the use of compost and composting are promising technologies (in all the approaches presented) for the bioremediation of PAH-contaminated soils.

scholarly journals Adsorption of Polycyclic Aromatic Hydrocarbons by Natural, Synthetic and Modified Clays

Environments ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 124
Author(s):  
Sara Satouh ◽  
Julia Martín ◽  
María del Mar Orta ◽  
Santiago Medina-Carrasco ◽  
Nabil Messikh ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Adsorption Capacity ◽  
Aromatic Hydrocarbons ◽  
Low Cost ◽  
X Ray Diffraction ◽  
X Ray ◽  
Toxicological Effects ◽  
Polycyclic Aromatic ◽  
Interesting Alternative ◽  
Environmental Compartments

Polycyclic aromatic hydrocarbons (PAHs) are of major scientific concern owing to their widespread presence in environmental compartments and their potential toxicological effects on humans and biota. In this study, the adsorption capacity of natural (montmorillonite (Mt)), synthetic (Na-Mica-4), and modified (with octadecylamine and octadecyltrimethylamine (ODA-Mt, ODA-Mica-4, and ODTMA-Mt and ODTMA-Mica-4)) clays were assessed and compared for the removal of 16 PAHs. Materials were synthesized and characterized by X-Ray diffraction, Zeta potential, and Fourier-transform infrared spectroscopy. The results showed its correct preparation and the incorporation of PAHs in the structure of the clays after the adsorption tests. The proposed materials were effective PAH adsorbents, with adsorption percentages close to 100%, in particular those using Mt. Mt and Na-Mica-4 presented a better adsorption capacity than their organofunctionalized derivatives, indicating that the adsorption of PAHs may occur both in the surface part and in the interlayer. The proposed adsorbents take the advantage of being a low cost and highly effective. They can be an interesting alternative for wastewater treatment and soil remediation to prevent PAH contamination.

scholarly journals DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) IN AQUEOUS SAMPLES BY HPLC-FLD WITH SALTING-OUT LIQUID-LIQUID EXTRACTION

2019 ◽  
Vol 16 (31) ◽  
pp. 95-110
Author(s):  
Byron ACOSTA ◽  
Isabel CIPRIANI-AVILA
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fruits And Vegetables ◽  
Low Cost ◽  
Standard Technique ◽  
Liquid Extraction ◽  
Aqueous Samples ◽  
Salting Out ◽  
Liquid Liquid Extraction ◽  
Polycyclic Aromatic

Polycyclic aromatic hydrocarbons (PAHs) are a group of more than 100 different chemical substances, which contain two, or more fused aromatic rings most of them toxic or carcinogenic. In this study, the Quechers extraction conditions were adapted to perform the extraction of aqueous samples. Quechers has become a standard technique for the analysis of pesticides and other organic substances. Its simplicity and low cost have made it popular in laboratories around the world for processing samples such as fruits and vegetables. The success of this method on solid samples contrasts with the advances in the extraction of aqueous samples where tedious steps of extraction, concentration and solvent changes must be carried out prior to the instrumental analysis. A methodology for the liquid-liquid extraction (water/acetonitrile) of 15 PAHs in aqueous matrices was developed. The mixture was saturated with anhydrous sodium sulfate to cause the partitioning and the extract was analyzed by High-Resolution Liquid Chromatography with Fluorescence Detection (HPLCFLD). The recoveries of analytes achieved (61-114%) were comparable to those expected using traditional extraction techniques, and with moderate uncertainty. The results were consistent with the expectations for of the required analytical and concentration ranges.

Sources, Toxicity, Potential Cancer Risk Assessment and Analytical Methods for Monitoring of Polycyclic Aromatic Hydrocarbons

2012 ◽  
Vol 524-527 ◽  
pp. 1739-1750 ◽  
Author(s):  
Jing Song Guo ◽  
Theoneste Ntakirutimana ◽  
Xu Gao ◽  
De Chun Gong
Keyword(s):  
Risk Assessment ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Cancer Risk ◽  
Aromatic Hydrocarbons ◽  
Low Cost ◽  
Precise Determination ◽  
Cancer Risk Assessment ◽  
Toxicity Potential ◽  
Polycyclic Aromatic ◽  
Potential Cancer

Pollution of polycyclic aromatic hydrocarbons (PAHs) has drawn much attention around the world. Recent years have seen an upsurge of interest in developing low cost and reliable methods for the detection and precise determination of Polycyclic Aromatic Hydrocarbons (PAHs), because of their carcinogenicity and toxicity. A comprehensive review focusing on sources, accumulation and toxicity of Polycyclic Aromatic hydrocarbons is presented. The review also highlights the current best practices for analysis of PAHs and discus in details the potential cancer risk assessment of Human risk exposure to PAH via three pathways. There is an increased need for laboratories in developing countries to determine such class of chemicals. A major focus revealed the need for low cost method that can be easily implemented such as Dispersive liquid–liquid micro-extraction.

Characteristics of Gasoline Fluorescence Using 404-nm Semi-Conductor Laser Diode Excitation

2002 ◽  
Vol 56 (7) ◽  
pp. 846-851 ◽  
Author(s):  
T. L. Yeo ◽  
K. B. Ozanyan ◽  
F. Hindle ◽  
N. R. J. Poolton ◽  
H. McCann
Keyword(s):  
Principal Component Analysis ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Laser Diode ◽  
Aromatic Hydrocarbons ◽  
Laser Light ◽  
Low Cost ◽  
Broad Band ◽  
Principal Component ◽  
Polycyclic Aromatic ◽  
Anti Stokes

The recent availability of reliable and relatively low-cost GaN based semi-conductor laser diode sources emitting at 404 nm has opened many new areas for fluorescence based measurements. This article characterizes the fluorescence behavior of commercial liquid-phase gasoline samples using such excitation sources. Comparison is drawn with the emission when excited using broad-band sources at shorter wavelengths (340 nm). Here, 404 nm is shown to selectively excite the larger C xH y polycyclic aromatic hydrocarbons (PAH) commonly found as minor constituents of gasoline, mainly for ( x, y) ≥ (14, 10). Both Stokes and anti-Stokes shifted emission was observed in all the gasoline tested and in some PAH samples. The fluorescence is usually superimposed on Raman scattered laser light, arising from vibrations within the basic benzene structures. The fluorescence features of the gasoline samples tested were found to be broadly similar, but, because of its distinctive spectroscopic features, the fluorescence arising from benzo(a)pyrene was found to be one of the main variants. More generally, principal component analysis of the spectra was able to highlight differences between both the sample provenance and the fuel variety.

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