Biological Air Filtration, A Sustainable Alternative for Volatile Organic Contamination Control in Closed Environments

2003 ◽  
Author(s):  
Fir Eckhard ◽  
Jos Brunink ◽  
Jaap Van Der Waarde ◽  
Niels Van Ras
Keyword(s):  
Air Filtration ◽  
Organic Contamination ◽  
Contamination Control ◽  
Volatile Organic ◽  
Volatile Organic Contamination

The Distribution of Volatile Organics in a Leachate Plume, Gloucester, Ontario

1987 ◽  
Vol 22 (1) ◽  
pp. 49-64 ◽  
Author(s):  
J.F. Devlin ◽  
W.A. Gorman
Keyword(s):  
Organic Contaminants ◽  
Source Area ◽  
Unconfined Aquifer ◽  
High Concentration ◽  
Organic Contamination ◽  
Aquifer System ◽  
Aquifer Systems ◽  
Volatile Organic ◽  
Volatile Organic Contaminants ◽  
Aquifer Sediments

Abstract The Gloucester Landfill is located near Ottawa, Ontario, on a northeast trending ridge of Quaternary age. The ridge comprises outwash sediments which make up two aquifer systems. A confined system exists next to bedrock, and is overlain by a silty-clayey stratum (the confining layer) which is, in turn, overlain by an unconfined aquifer system. Two independent volatile organic plumes have previously been identified at the landfill: the southeast plume, which has penetrated the confined aquifer system, and the northeast plume which is migrating in the unconfined aquifer. The distribution of volatile organic contaminants at the northeast plume site appears to be a function of two factors: (1) heterogeneities in the aquifer sediments are causing the channeling of contaminants through a narrow path; (2) the low fraction of organic carbon in the unconfined aquifer sediments at the northeast site is resulting in little retardation of the contaminants there, relative to those at the southeast site. Acetate was the only volatile fatty acid detected in the leachate. It was measurable only in areas where the volatile organic contamination was significant. Although methane was detected in the contaminated sediments, suggesting that microbial activity was present, the high concentration of acetate (>1000 ppm) which was detected down-gradient from the source area indicates that any biodegradation which is occurring is proceeding at a very slow rate.

scholarly journals Concerns of Organic Contamination for Sample Return Space Missions

2020 ◽  
Vol 216 (4) ◽  
Author(s):  
Queenie Hoi Shan Chan ◽  
Rhonda Stroud ◽  
Zita Martins ◽  
Hikaru Yabuta
Keyword(s):  
Organic Matter ◽  
Solar System ◽  
Analytical Techniques ◽  
Lessons Learned ◽  
Organic Analysis ◽  
Terrestrial Organic Matter ◽  
Organic Contamination ◽  
Sample Return ◽  
Contamination Control ◽  
Solar System Exploration

Abstract Analysis of organic matter has been one of the major motivations behind solar system exploration missions. It addresses questions related to the organic inventory of our solar system and its implication for the origin of life on Earth. Sample return missions aim at returning scientifically valuable samples from target celestial bodies to Earth. By analysing the samples with the use of state-of-the-art analytical techniques in laboratories here on Earth, researchers can address extremely complicated aspects of extra-terrestrial organic matter. This level of detailed sample characterisation provides the range and depth in organic analysis that are restricted in spacecraft-based exploration missions, due to the limitations of the on-board in-situ instrumentation capabilities. So far, there are four completed and in-process sample return missions with an explicit mandate to collect organic matter: Stardust and OSIRIS-REx missions of NASA, and Hayabusa and Hayabusa2 missions of JAXA. Regardless of the target body, all sample return missions dedicate to minimise terrestrial organic contamination of the returned samples, by applying various degrees or strategies of organic contamination mitigation methods. Despite the dedicated efforts in the design and execution of contamination control, it is impossible to completely eliminate sources of organic contamination. This paper aims at providing an overview of the successes and lessons learned with regards to the identification of indigenous organic matter of the returned samples vs terrestrial contamination.

Electrospun Polyacrylonitrile/β-Cyclodextrin Composite Membranes for Simultaneous Air Filtration and Adsorption of Volatile Organic Compounds

2018 ◽  
Vol 1 (8) ◽  
pp. 4268-4277 ◽  
Author(s):  
Vinod Kadam ◽  
Yen Bach Truong ◽  
Christopher Easton ◽  
Shayanti Mukherjee ◽  
Lijing Wang ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Composite Membranes ◽  
Air Filtration ◽  
Volatile Organic

scholarly journals The Danger of Toxic Substances

10.14311/346 ◽  
2002 ◽  
Vol 42 (3) ◽  
Author(s):  
M. V. Jokl
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxides ◽  
Cigarette Smoke ◽  
Building Materials ◽  
Human Organism ◽  
Toxic Substances ◽  
Air Filtration ◽  
Effective Measure ◽  
Volatile Organic ◽  
Sunny Weather

Toxic (harmful) gases enter building interiors partly from outdoors (sulfur oxides, nitrogen oxides, carbon monoxide, ozone, smog and acid rains), partly originate indoors - as a result of human activity (carbon monoxide, tobacco smoke, nitrogen oxides, ozone, hydrocarbons) and also emanate from building materials (formaldehyde, volatile organic compounds). The human organism is most often exposed to cigarette smoke (especially nonsmokers are endangered, as cigarette smoke devastes the pulmonary and cardiovasculary system) and to smog entering from outdoors, paradoxically during sunny weather. Preventing toxic production is the most effective measure, e.g., by coaxing to coax smokers out of "civilized" areas, by using energy rationally (i.e., conserving energy), to turn to pure fuels and to increase energy production by non-combustion technologies. Besides ventilation and air filtration, the toxic gases can be removed to a remarkable extent by plants (by which decay the substances into nontoxic gases), and by air ionization. Review article.

Sources of volatile organic compounds in suburban homes in Shanghai, China, and the impact of air filtration on compound concentrations

Chemosphere ◽  
2019 ◽  
Vol 231 ◽  
pp. 256-268 ◽  
Author(s):  
Christina Norris ◽  
Lin Fang ◽  
Karoline K. Barkjohn ◽  
David Carlson ◽  
Yinping Zhang ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Air Filtration ◽  
Volatile Organic ◽  
The Impact
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