August 20, 2023 - Chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs) are a group of compounds comprising polycyclic aromatic hydrocarbons with two or more aromatic rings and one or more chlorine atoms attached to the ring system.

Four PAH compounds, fluorene, anthracene, fluoranthene and benzo(a)pyrene were dissolved in humus poor (lake) and humus rich water. The samples were chlorinated, stored for three days, and extracted with cyclohexane. Chlorinated derivatives of the four compounds were synthesised and used as ...

Chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs) as disinfection products for source waters containing PAHs have raised environmental concern due to their dioxin-like toxicity and potential hazardous effect on human health.

PMF has been effective for source identification and apportionment of ambient PAHs around the world7,8,9,10,11,12. The chlorinated PAHs (ClPAHs) are of increasing interest in the study of PAH derivatives as new classes of environmental contaminants, because findings indicate strong environmental ...

December 31, 1995 - They will also soon issue a diesel ... for PAHS, including many nitrogen substituted compounds. In addition to natural matrix materials, solutions useful for calibrating chromatographic detector response factors and retention times, and spiking sample blanks for determination of analyte recoveries, are also available. Solution SRMs currently available contain PCS congeners, chlorinated pesticides, ...

3 days ago - A polycyclic aromatic hydrocarbon (PAH) is a class of organic compounds that is composed of multiple aromatic rings. The simplest representative is naphthalene, having two aromatic rings, and the three-ring compounds anthracene and phenanthrene. PAHs are uncharged, non-polar and planar.

Chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs) as disinfection products for source waters containing PAHs have raised environmental concern due to their dioxin-like toxicity and potential hazardous effect on human health.

Halogenated polycyclic aromatic ... aromatic rings and one halogen substituted hydrogen in the aromatic ring. Substituents could be chlorine, bromine, fluorine, and/or a mixture of these elements....

The concentrations of PAHs in drinking water sources range from nanogram to microgram-per-liter quantities. Conventional treatment (flocculation, sedimentation, chlorination, and filtration) appears to substantially reduce total PAH concentrations present at higher concentrations in source waters.

Molecular chlorine Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]

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September 1, 1998 - PDF | In presence of disinfectants, PAH are remobilized from the coal tar lining of water distribution mains. Reactions of the PAH with chlorine and... | Find, read and cite all the research you need on ResearchGate

The remediation of soils contaminated with PAHs has aroused wide public concern. In this study, hypochlorous acid (HOCl) was applied to realize PAHs removal from industrial contaminated soil with an extremely high degradation efficiency of 93.33% when the initial chlorine concentration was ...

Polycyclic aromatic hydrocarbons (PAHs) are widespread across the globe mainly due to long-term anthropogenic sources of pollution. The inherent properties of PAHs such as heterocyclic aromatic ring structures, hydrophobicity, and thermostability ...

Serum chloride at 6 months from the PAH diagnosis is a strong and independent predictor of mortality in patients with idiopathic or heritable PAH, even after adjusting serum sodium, renal function, diuretic, and prostacyclin analog usage.

PAHs are a group of chemicals that are formed during the incomplete burning of coal, oil, gas, wood, garbage, or other organic substances, such as tobacco and charbroiled meat. There are more than 100 different PAHs. PAHs generally occur as complex mixtures (for example, as part of combustion ...

An on-line sampling system was designed for the 16 PAHs, which consisted of a glass wool filter, condenser, glass fiber filter, Teflon filter, and a Tenax trap. The filters and Tenax were extracted by methylene chloride and hexane, respectively, followed by GC/MS analysis using the selective ion monitoring (SIM) mode. In this project, the effects of operating parameters, limestone addition, chlorine ...

Examination of the pollutant contamination. Specification of pollutants such as PCB, DDT, PAH & mineral wool. Professional execution of the remediation.

June 26, 2023 - Polycyclic aromatic hydrocarbons (PAHs) are a group of hundreds of different chemicals formed by burning organic material. For example, coal, oil, gas, garbage, wood, and food will all release PAHs when burned. These chemicals can be created by human activity, such as automobile exhaust or ...