Intercomparison of Volatile Organic Carbon Measurement Techniques and Data at La Porte during the TexAQS2000 Air Quality Study

2004 ◽  
Vol 38 (1) ◽  
pp. 221-228 ◽  
Author(s):  
W. C. Kuster ◽  
B. T. Jobson ◽  
T. Karl ◽  
D. Riemer ◽  
E. Apel ◽  
...  
Keyword(s):  
Air Quality ◽  
Organic Carbon ◽  
Measurement Techniques ◽  
Volatile Organic Carbon ◽  
Volatile Organic ◽  
Quality Study

A Device for Measuring Volatile Organic-Carbon Emissions from Cooling-Tower Water

1981 ◽  
Vol 31 (12) ◽  
pp. 1280-1282 ◽  
Author(s):  
William D. Vernon ◽  
Bert M. Wyman ◽  
Richard V. Hubert ◽  
Joseph R. Snyder
Keyword(s):  
Organic Carbon ◽  
Carbon Emissions ◽  
Cooling Tower ◽  
Volatile Organic Carbon ◽  
Volatile Organic

scholarly journals Emission from Uyo Main Refuse Dumpsite and Potential Impact on Health

2020 ◽  
pp. 8-13
Author(s):  
S. A. Nta ◽  
M. J. Ayotamuno ◽  
A. H. Igoni ◽  
R. N. Okparanma
Keyword(s):  
Air Quality ◽  
Quality Index ◽  
Ambient Air ◽  
Air Quality Index ◽  
Volatile Organic Carbon ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Landfill Emissions ◽  
Potential Impact ◽  
Pm2.5 And Pm10

This paper presents potential impact on health of emission from landfill site on Uyo village road, Uyo local government area of Akwa Ibom State, Nigeria. Three sampling points were assessed for particulate matter (PM2.5 and PM10), nitrogen dioxide (NO2), sulphur dioxide (SO2), carbon monoxide (CO), hydrogen sulphide H2S, ammonia (NH3), total volatile organic carbon (TVOC) and hydrogen cyanide (HCN) using highly sensitive digital portable meters. The data obtained were expressed in terms of an air quality index. Air quality index indicates that the ambient air can be described as unhealthy for sensitive groups for NO2, unhealthy for SO2 and PM2.5 and moderate for CO, respectively. H2S, NH3, TVOC, HCN, PM10 were not indicated in USEPA air quality standards. It recommended that stringent and proper landfill emissions management together with appropriate burning of wastes should be considered in the study area to ease the risks associated with these pollutants on public health.

scholarly journals Generation and validation of oxygenated volatile organic carbon standards for the 1995 Southern Oxidants Study Nashville Intensive

1998 ◽  
Vol 103 (D17) ◽  
pp. 22281-22294 ◽  
Author(s):  
E. C. Apel ◽  
J. G. Calvert ◽  
J. P. Greenberg ◽  
D. Riemer ◽  
R. Zika ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Volatile Organic Carbon ◽  
Volatile Organic

scholarly journals The effects of biofilter on the removal of greenhouse gases at anaerobic digestion plants

2014 ◽  
Vol 6 (1) ◽  
pp. 65-68
Author(s):  
Thanh Phong Nguyen ◽  
Joachim Clemens ◽  
Carsten Cuhls
Keyword(s):  
Nitrous Oxide ◽  
Anaerobic Digestion ◽  
Organic Carbon ◽  
Greenhouse Gases ◽  
Total Organic Carbon ◽  
Exhaust Gases ◽  
Volatile Organic Carbon ◽  
Volatile Organic ◽  
Pre Treatment

This study investigated the removal of gases such as methane (CH4), nitrous oxide (N2O) and ammonia (NH3) from biofilters in nine anaerobic digestion plants in Germany that treat biowaste. The treatment is in form of mechanical pre-treatment, anaerobic digestion followed by a composting with or without intensive aeration. The exhaust gases from the mechanical and anaerobic steps are treated by biofilters. In average, the biofilters removed 30% of total organic carbon (TOC), 50% of non-methane volatile organic carbon (NMVOC) and 51% NH3, whereas N2O concentrations increased by 26%. For CH4 the biofilters had only a small removal effect (6%). Nghiên cứu khảo sát sự loại bỏ những khí gây hiệu ứng nhà kính như CH4, N2O và NH3 từ những bể lọc khí sinh học ở chín nhà máy xử lý rác thải hữu cơ ở nước Đức bằng các biện pháp kỵ khí và hiếu khí. Rác hữu cơ được xử lý ở nhà máy thông qua các biện pháp như tiền xử lý bằng cơ học, kỵ khí và tiếp theo là hiếu khí với công nghệ thổi khí chủ động hoặc không thổi khí chủ động. Khí thải từ các quá trình cơ học và kỵ khí được xử lý bằng biện pháp lọc khí sinh học trước khi thải ra môi trường. Trung bình, những bể lọc khí sinh học loại bỏ 30% tổng lượng carbon hữu cơ, 50% những chất carbon hữu cơ bay hơi nhưng không phải khí methane và 51% khí ammoniac. Trong khi đó, nồng độ khí N2O tăng lên 26% sau khi qua bể lọc khí sinh học. Đối với khí methane, bể lọc khí sinh học có hiệu suất loại bỏ với loại khí này rất thấp chỉ 6%.

scholarly journals Contributions to OH reactivity from unexplored volatile organic compounds measured by PTR-ToF-MS – a case study in a suburban forest of the Seoul metropolitan area during the Korea–United States Air Quality Study (KORUS-AQ) 2016

2021 ◽  
Vol 21 (8) ◽  
pp. 6331-6345
Author(s):  
Dianne Sanchez ◽  
Roger Seco ◽  
Dasa Gu ◽  
Alex Guenther ◽  
John Mak ◽  
...  
Keyword(s):  
United States ◽  
Air Quality ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Mass Spectrometer ◽  
Metropolitan Area ◽  
Seoul Metropolitan Area ◽  
Volatile Organic ◽  
Quality Study ◽  
Tof Ms

Abstract. We report OH reactivity observations by a chemical ionization mass spectrometer–comparative reactivity method (CIMS-CRM) instrument in a suburban forest of the Seoul metropolitan area (SMA) during the Korea–United States Air Quality Study (KORUS-AQ 2016) from mid-May to mid-June of 2016. A comprehensive observational suite was deployed to quantify reactive trace gases inside of the forest canopy including a high-resolution proton transfer reaction time-of-flight mass spectrometer (PTR-ToF-MS). An average OH reactivity of 30.7±5.1 s−1 was observed, while the OH reactivity calculated from CO, NO+NO2 (NOx), ozone (O3), sulfur dioxide (SO2), and 14 volatile organic compounds (VOCs) was 11.8±1.0 s−1. An analysis of 346 peaks from the PTR-ToF-MS accounted for an additional 6.0±2.2 s−1 of the total measured OH reactivity, leaving 42.0 % missing OH reactivity. A series of analyses indicate that the missing OH reactivity most likely comes from VOC oxidation products of both biogenic and anthropogenic origin.

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