Monitoring of elemental mercury in ambient air around an Egyptian natural gas processing plant
| Autor: | S. Faramawy, Mohamed B. Masod, A.A. El-Feky, Mohamed A. Ebiad, W. I. M. El-Azab |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
business.industry
020209 energy Natural-gas processing Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Geotechnical Engineering and Engineering Geology medicine.disease Mass spectrometry 01 natural sciences Mercury (element) Ambient air Fuel Technology chemistry Natural gas Environmental chemistry Storage tank 0202 electrical engineering electronic engineering information engineering medicine Environmental science Dehydration Cold vapour atomic fluorescence spectroscopy business 0105 earth and related environmental sciences |
| Zdroj: | Journal of Natural Gas Science and Engineering. 54:189-201 |
| ISSN: | 1875-5100 |
| DOI: | 10.1016/j.jngse.2018.01.019 |
| Popis: | Gaseous elemental mercury (Hg°) emitted into the ambient air around an Egyptian plant was determined during the different stages and processing of natural gas. Around 34 locations were selected beside the natural gas treatment process (inlet separation, dehydration, sweetening, NGL removal, condensate shipping, water removal and flaring processes). Mercury concentration measurements in the ambient air were performed for a period of one month. The elemental mercury was collected on a gold coated silica trap by amalgamation and then measured with cold vapor atomic absorption spectrometry via double amalgam technique. The measured mercury concentrations for all measuring locations were in the range 8.3–212.2 ng/Sm3. The highest average Hg° concentration (212.2 ng/Sm3) was found at the open drain of the condensate storage tank (CSA‒OD); and this concentration is higher than the maximum acceptable level (200 ng/Sm3) according to the U.S. agency for toxic substances and disease registry (ATSDR). However, this concentration still below the maximum limit (300 ng/Sm3) of U.S. environmental protection agency (EPA). The mercury concentration in all other sites (33 locations) have an acceptable level located in the range 8.3–114.9 ng/Sm3. Therefore, all the sites around the Egyptian gas processing facilities were environmentally safe for humans except the CSA‒OD site referenced to ATSDR. |
| Databáze: | OpenAIRE |
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