Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Methylsiloxanes in petroleum refinery facility: Their sources, emissions, environmental distributions and occupational exposure
Graphical abstract Display Omitted
Highlights Siloxanes were widely found in crude oil, additives and petrochemical products. Deep catalytic cracking unit had the largest siloxane emission in oil-refinery. Siloxanes had more apparent distribution in refinery facility than reference area. Plasma levels of siloxanes and metabolites in refinery workers were much elevated.
Abstract High concentrations (1.08 ng/g-3.61 mg/g) of methylsiloxanes, including cyclic analogs [octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5) and dodecamethylcyclohexasiloxane (D6)], and linear analogs with 3–14 silicon atoms (L3-L14), have been detected in crude oil, additives and petroleum products from one petroleum refinery facility in China. Overall, the total mass load of Σmethylsiloxanes (1320 kg/day) in crude oil and additives was 1.5 times higher than that in petroleum products (857 kg/day), indicating their potential emissions in this facility, which were further confirmed by the find of their obvious emission through exhaust-gas (89.4 kg/day) and wastewater (4.70 kg/day). Σmethylsiloxanes emission from exhaust-gas discharge outlets of deep catalytic cracking units (60.6 kg/day) took up 68% of their total emission from all gas outlets. Overall, Σmethylsiloxanes in air (17.1–743 μg/m3) and soil samples [311 ng/g dw (dry weight) − 34.2 μg/g dw] from this facility were up to four orders of magnitude greater than those from surrounding areas, and plasma concentrations of Σmethylsiloxanes in current workers from this facility (7.4–609 ng/mL) were up to two orders of magnitude larger than those from reference group (
Methylsiloxanes in petroleum refinery facility: Their sources, emissions, environmental distributions and occupational exposure
Graphical abstract Display Omitted
Highlights Siloxanes were widely found in crude oil, additives and petrochemical products. Deep catalytic cracking unit had the largest siloxane emission in oil-refinery. Siloxanes had more apparent distribution in refinery facility than reference area. Plasma levels of siloxanes and metabolites in refinery workers were much elevated.
Abstract High concentrations (1.08 ng/g-3.61 mg/g) of methylsiloxanes, including cyclic analogs [octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5) and dodecamethylcyclohexasiloxane (D6)], and linear analogs with 3–14 silicon atoms (L3-L14), have been detected in crude oil, additives and petroleum products from one petroleum refinery facility in China. Overall, the total mass load of Σmethylsiloxanes (1320 kg/day) in crude oil and additives was 1.5 times higher than that in petroleum products (857 kg/day), indicating their potential emissions in this facility, which were further confirmed by the find of their obvious emission through exhaust-gas (89.4 kg/day) and wastewater (4.70 kg/day). Σmethylsiloxanes emission from exhaust-gas discharge outlets of deep catalytic cracking units (60.6 kg/day) took up 68% of their total emission from all gas outlets. Overall, Σmethylsiloxanes in air (17.1–743 μg/m3) and soil samples [311 ng/g dw (dry weight) − 34.2 μg/g dw] from this facility were up to four orders of magnitude greater than those from surrounding areas, and plasma concentrations of Σmethylsiloxanes in current workers from this facility (7.4–609 ng/mL) were up to two orders of magnitude larger than those from reference group (
Methylsiloxanes in petroleum refinery facility: Their sources, emissions, environmental distributions and occupational exposure
Liu, Nannan (Autor:in) / Sun, Hongyu (Autor:in) / Xu, Lin (Autor:in) / Cai, Yaqi (Autor:in)
15.02.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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