- Development of Air-Cleaning Device Using Chemically Impregnated Activated Carbon for Interior Vehicle Application

2012 ◽  
pp. 270-285
Keyword(s):  
Activated Carbon ◽  
Air Cleaning ◽  
Cleaning Device

scholarly journals Design of Multistage Air Cleaning Device for Bus

2020 ◽  
Vol 143 ◽  
pp. 02055
Author(s):  
Mengjie Wu ◽  
Shuang Hu ◽  
Yuheng Tang
Keyword(s):  
Activated Carbon ◽  
Air Quality ◽  
Organic Pollutants ◽  
Air Pollutants ◽  
Purification Method ◽  
Oxygen Ions ◽  
Air Cleaning ◽  
Cleaning Device

According to the survey, the concentration of pollutants in most buses exceeds the standard seriously, which not only reduces the comfort of passengers, but also harms the health of drivers and passengers. Therefore, it is very important to purify the air in the bus. However, there are many kinds of air pollutants in the bus, and the effect of single purification method is poor. Through the reasonable combination of activated carbon, photocatalyst and negative oxygen ions, the device can absorb and filter organic pollutants, bacteria and viruses in the air. Therefore, the device realizes the treatment of a variety of air pollutants in the bus, effectively improves the air quality in the bus, and also provides a healthy and comfortable travel environment for passengers.

scholarly journals Validation of chemotherapy drug vapor containment of an air cleaning closed-system drug transfer device

2021 ◽  
pp. 107815522110306
Author(s):  
Galit Levin ◽  
Paul JM Sessink
Keyword(s):  
Activated Carbon ◽  
Closed System ◽  
Membrane Filter ◽  
Drug Transfer ◽  
Glass Vessel ◽  
Air Cleaning ◽  
No Release ◽  
Activated Carbon Filter ◽  
Carbon Filter ◽  
Transfer Device

Purpose The purpose of this study was to test the efficacy of ChemfortTM, an air filtration closed-system drug transfer device to prevent release of chemotherapy drug vapors and aerosols under extreme conditions. The air cleaning system is based on the adsorption of drug vapors by an activated carbon filter in the Vial Adaptor before the air is released out of the drug vial. The functionality of the carbon filter was also tested at the end of device’s shelf life, and after a contact period with drug vapors for 7 days. Cyclophosphamide and 5-fluorouracil were the chemotherapy drugs tested. Methods The Vial Adaptor was attached to a drug vial and both were placed in a glass vessel. A needle was punctured through the vessel stopper and the Vial Adaptor septum to allow nitrogen gas to flow into the vial and to exit the vial via the air filter into the glass vessel which was connected to a cold trap. Potential contaminated surfaces in the trap system were wiped or rinsed to collect the escaped drug. Samples were analyzed using liquid chromatography tandem mass spectrometry. Results Cyclophosphamide and 5-fluorouracil were detected on most surfaces inside the trap system for all Vial Adaptors without an activated carbon filter. Contamination did not differ between the Vial Adaptors with and without membrane filter indicating no effect of the membrane filter. The results show no release of either drug for the Vial Adaptors with an activated carbon filter even after 3 years of simulated aging and 7 days of exposure to drug vapors. Conclusions Validation of air cleaning CSTDs is important to secure vapor and aerosol containment of chemotherapy and other hazardous drugs. The presented test method has proven to be appropriate for the validation of ChemfortTM Vial Adaptors. No release of cyclophosphamide and 5- fluorouracil was found even for Vial Adaptors after 3 years of simulated aging and 7 days of exposure to drug vapors.

Removal of Formaldehyde and Volatile Organic Compounds from Particleboards by Air-Cleaning Materials

2010 ◽  
Vol 113-116 ◽  
pp. 1870-1873
Author(s):  
Xiao Dong Zhu ◽  
Jun Shen ◽  
Yu Liu
Keyword(s):  
Activated Carbon ◽  
Voc Emissions ◽  
Photo Catalyst ◽  
Air Cleaning ◽  
Test Conditions ◽  
Formaldehyde Removal ◽  
Volatile Organic ◽  
Removal Efficiencies ◽  
Short Time ◽  
The Impact

The removal efficiencies of 4 air-cleaning materials on formaldehyde and VOC emissions from particleboards were examined in this paper. The effect of activated carbon and photo catalyst on formaldehyde and VOC emissions removal was notable in short time. The effect of scavenger was obviously on formaldehyde removal for its synthetic mechanism. And the impact of bioenzyme on formaldehyde and VOC emissions from particleboards is dependent on the test conditions and it shows no impact on emissions in this experiment.

Air Cleaning Device for Motor Vehicles Using a Low-Voltage Conductive Filter

1993 ◽  
Author(s):  
Hideo Yoshikawa ◽  
Takeshiro Komatsu ◽  
Takashi Ikeda ◽  
Fumio Miyamoto
Keyword(s):  
Low Voltage ◽  
Motor Vehicles ◽  
Air Cleaning ◽  
Cleaning Device

A Study on the Control of Bio-Aerosol for Prevention of Indoor Aerial Infection Using Antimicrobial Air Filter

2013 ◽  
Vol 284-287 ◽  
pp. 1601-1605 ◽  
Author(s):  
Kyung Mi Lee ◽  
Byong Hyoek Lee ◽  
Chan Jung Park
Keyword(s):  
Antimicrobial Activities ◽  
Influenza Viruses ◽  
Human Influenza Virus ◽  
Air Filter ◽  
Air Cleaning ◽  
Biological Contaminants ◽  
Cleaning Device ◽  
Viral Survival ◽  
Antiviral Activities ◽  
Biological Protection

Some indoor bio-aerosols trigger allergic reactions, including hypersensitivity pneumonitis, allergic rhinitis, and various types of asthma. Moreover, human influenza virus is one of the bio-aerosols that causes significant morbidity and mortality every year worldwide. Although vaccination is the most effective way to address the risk of airborne infection, they are not always feasible, available and practiced. An air cleaning device is effective and efficient in removing indoor bio-aerosols and thereby controlling or eliminating these airborne biological contaminants. An antimicrobial filter is developed and its antimicrobial activities against influenza viruses are measured. An extract from Gingko Biloba L. and Sumac (Rhus Javanica L.) possesses antifungal, antibacterial, and antiviral activities thus this class of natural products is used as an antimicrobial agent in this study. An antimicrobial air filters were prepared by coating the natural agent on polypropylene filter media. The antimicrobial rates of the filter against new influenza (H1N1) virus and A/PuertoRico/8/34 (A/PR/8) virus were greater than 99.9999%. The antimicrobial filters were effective in controlling the bio-aerosols by inhibiting bacterial and viral survival on the filter, thereby preventing secondary contamination of filter from breeding of bio-aerosols. An air cleaning device equipped with the antimicrobial air filter was tested for the inhibition effect on viruses and no virus was detected at the outlet of the purifier. Although the antimicrobial filters are developed and tested only for the inactivation of virus in this study, the filter could be also effective in removing other types of bio-aerosols, such as bacteria, fungi, and allergens. The antimicrobial filter appears to be promising application in air cleaning and biological protection fields.

scholarly journals INVESTIGATION AND ANALYSIS OF AIR-CLEANING BIOFILTER HYBRID BIOCHARGE QUANTITATIVE AND QUALITATIVE PARAMETERS / ORO VALYMO BIOFILTRO MIŠRIOS ĮKROVOS KIEKYBINIŲ IR KOKYBINIŲ MIKROBIOLOGINIŲ PARAMETRŲ TYRIMAI / ИССЛЕДОВАНИЕ КОЛИЧЕСТВЕННЫХ ИК А ЧЕСТВЕННЫХ МИКРОБИОЛОГИЧЕСКИХ ПАРАМЕТРОВВОЗДУХООЧИСТНОГО БИОФИЛЬТРА ПРИ СМЕШАННОЙ ЗАГРУЗКЕ

2011 ◽  
Vol 19 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Aušra Zigmontienė ◽  
Lukas Žarnauskas
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Saline Solution ◽  
Hydrogen Ions ◽  
Alcohol Group ◽  
Mould Fungus ◽  
Air Cleaning ◽  
Wood Shavings ◽  
Volatile Organic ◽  
Cleaning Device

Investigation of microorganism quantitative and qualitative parameters in the hybrid load of the biofilter allows improving the parameters of one of the most effective and cheapest air cleaning technologies of volatile organic compounds (VOCs)—biofiltration process. The point of biofiltering is the partitioning of volatile organic compounds during the metabolism of microorganisms. In pursuance to assure the best conditions for their growth, the biofilter is loaded with biocharge mixture made of zeolite, foam and wood shavings. The device is filled with VOCs mixture consisting of: acetone of ketone group; butanol of alcohol group and xylene of aromatic carbohydrate group. The optimal temperature of 30 °C is sustained in the air-cleaning device as well as neutral concentration of hydrogen ions (pH 6.9–7.1), biocharge mixture is irrigated with mineral saline solution. The investigation results show that the biofilter is operating most effectively 8 weeks after the end of its activation. The most propitious conditions for growing in the first biofilter cassette is when mould fungus and bacteria cultures have grown, the distribution percentage of which is respectively 5.3% and 94.7% in regard to all grown colonies. The most acceptable for mould is the faction of zeolite granules and activated synthetic foam cubes for bacteria. Santrauka Mikroorganizmų biofiltro mišrios įkrovos kiekybinių ir kokybinių parametrų tyrimai leidžia tikslingiau įvertinti vienos iš efektyviausių ir pigiausių LOJ (lakiųjų organinių junginių) valymo iš oro technologijų – biofiltracijos proceso parametrus. Biofiltracijos proceso esmė – LOJ skaidymas vykstant mikroorganizmų metabolizmui. Siekiant užtikrinti palankiausias sąlygas jiems augti, kaip biofiltro bioįkrova panaudota ceolito, porolono ir medienos drožlių mišinys. Į įrenginį buvo leidžiamas LOJ mišinys, į kurio sudėtį įėjo: ketonų grupei priklausantis acetonas; alkoholių grupei – butanolis ir aromatinių angliavandenilių grupei – ksilenas. Oro valymo įrenginyje buvo palaikoma optimali 30 °C temperatūra, neutralivandenilio jonų koncentracija (pH 6,9–7,1), bioįkrovos mišinys drėkintas mineralinių druskų tirpalu. Tyrimų rezultatairodo, kad biofiltras efektyviausiai veikia praėjus 8 savaitėms nuo jo aktyvinimo. Užaugus pelėsinių grybų ir bakterijų kultūroms (jų procentinis pasiskirstymas įrenginyje yra 5,3 % ir 94,7 % visų užaugusių kolonijų atžvilgiu) nustatyta, kad palankiausios sąlygos augti pirmoje biofiltro kasetėje. Pelėsiams tinkamiausia ceolito granulių frakcija, o bakterijoms – suaktyvinti sintetiniai porolono kubeliai. Резюме Исследование количественных и качественных параметров микроорганизмов при смешанной загрузке биофильтра позволяет совершенствовать параметры одной из самых эффективных и дешевых технологий по очисткевоздуха от летучих органических соединений (ЛОС) – процесса биофильтрации. Суть процесса биофильтрациизаключается в расщеплении ЛОС в процессе метаболизма микроорганизмов. В целях обеспечения самых благоприятных условий для их роста биофильтр загружался биологической смесью из цеолита, поролона и древеснойстружки. В устройство вводилась смесь ЛОС, в состав которой входил ацетон (группа кетонов), бутанол (группа спиртов) и ксилен (группа углеводородов). В воздухоочистном устройстве поддерживалась оптимальная температура (30 oC), нейтральная концентрация ионов водорода (pH 6,9–7,1), биологическая загрузочная смесь смачивалась раствором минеральных солей. Полученные результаты свидетельствовали о том, что наиболее эффективнобиофильтр работает спустя 8 недель после окончания его активизации. После того, как культуры грибков плесении бактерий, процентное распределение которых в устройстве соответственно было равно 5,3% и 94,7% относительно всех выращенных колоний, выросли, наиболее благоприятными для роста оказались условия в первой кассете биофильтра. Для плесени наиболее приемлемой оказалась фракция гранул цеолита, а для бактерий –активизированные кубики синтетического поролона.

Air Cleaning Performance of a Novel Electrostatic Air Purifier Using an Activated Carbon Fiber Filter for Passenger Cars

2017 ◽  
Vol 53 (6) ◽  
pp. 5867-5874 ◽  
Author(s):  
Hak-Joon Kim ◽  
Bangwoo Han ◽  
Chang Gyu Woo ◽  
Yong-Jin Kim ◽  
Gi-Taek Lim ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Activated Carbon Fiber ◽  
Passenger Cars ◽  
Air Cleaning ◽  
Cleaning Performance ◽  
Air Purifier ◽  
Fiber Filter

scholarly journals Energy efficient indoor VOC air cleaning with activated carbon fiber (ACF) filters

2012 ◽  
Vol 47 ◽  
pp. 357-367 ◽  
Author(s):  
Meera A. Sidheswaran ◽  
Hugo Destaillats ◽  
Douglas P. Sullivan ◽  
Sebastian Cohn ◽  
William J. Fisk
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Energy Efficient ◽  
Activated Carbon Fiber ◽  
Air Cleaning

scholarly journals EXPERIMENTAL REEARCH ON APPLYING LAVSAN IN THE AIR BIOFILTRATION PROCESS / LAVSANO TAIKYMO ORO BIOFILTRACIJOS PROCESE EKSPERIMENTINIAI TYRIMAI

2013 ◽  
Vol 5 (4) ◽  
pp. 376-381 ◽  
Author(s):  
Alvydas Zagorskis ◽  
Aleksandra Milaknytė
Keyword(s):  
Environmental Protection ◽  
Cleaning Efficiency ◽  
Initial Concentration ◽  
Air Cleaning ◽  
Air Volume ◽  
Air Stream ◽  
Cleaning Device ◽  
Rich Solution ◽  
Material Load ◽  
Air Biofiltration

Air cleaning efficiency tests on placing material load into the lavsan biofilter were carried out. Testing included butanol vapour-contaminated air stream pulled during the boot. The studies were conducted by the Department of Environmental Protection at VGTU that developed a biofilter – an experimental biological air cleaning device. Measurements were done using 60 l/min and 90 l/min air volume aspirators under the initial pollutant concentration making 180, 305, 350, 440 and 545 mg/m3. Before measuring the concentrations of butanol lavsan cartridge, loading was periodically irrigated with nutrient-rich solution. In order to evaluate the influence of microorganisms on genus Pseudomonas, cleaning efficiency tests were repeated – Boot was moistened with water only, which allowed measuring butanol vapour concentrations after the cartridge. At the concentration of 180±9 mg/m3, efficiency reached 41% at a speed of 0,07 m/s and 46 % at a speed of 0,10 m/s. Measuring the performance of the initial concentration of 545±67 mg/m3, efficiency was 54% at 0,07 m/s and 53 % at 0,10 m/s respectively. Article in Lithuanian. Santrauka Atlikti oro valymo efektyvumo tyrimai į lašelinį biofiltrą įkrovus lavsano medžiagos įkrovą. Bandymų metu pro įkrovą buvo traukiamas butanolio garais užterštas oro srautas. Tyrimai atliekami naudojant VGTU Aplinkos apsaugos katedroje sukurtą eksperimentinį biologinį oro valymo įrenginį – biofiltrą. Matavimai atlikti leidžiant 60 l/min. ir 90 l/min. oro kiekį aspiratoriumi. Pradinės teršalo koncentracijos – 180, 305, 350, 440, 545 mg/m3. Prieš matuojant butanolio koncentracijas panaudojant lavsano medžiagos kasetę, įkrova buvo periodiškai drėkinama maistinių medžiagų prisotintu tirpalu. Pseudomonas genties mikroorganizmų įtakai valymo efektyvumui įvertinti tyrimai buvo pakartoti – įkrovos sudrėkinamos tik vandeniu, leidžiami butanolio garai, ir matuojamos koncentracijos panaudojus lavsano medžiagos kasetę. Esant 180±89 mg/m3 koncentracijai biofiltro oro valymo efektyvumas siekė 41 %, kai per įkrovą leidžiamo dujų srauto greitis buvo 0,07 m/s, ir 46 %, kai greitis 0,10 m/s. Nustatyta valymo efektyvumas. Esant 545±55 mg/m3 pradinei koncentracijai jis siekė 54 % (0,07 m/s) ir 53 % (0,10 m/s).

scholarly journals PLASMA COATING FORMED TIO2 CATALYSTS USAGE IN CLEANING THE AIR FROM NITROGEN OXIDES AND CARBON MONOXIDE / PLAZMINIU PURŠKIMU SUFORMUOTŲ TIO2 KATALIZATORIŲ TAIKYMAS VALANT IŠ ORO AZOTO OKSIDUS IR ANGLIES MONOKSIDĄ

2015 ◽  
Vol 7 (4) ◽  
pp. 365-371
Author(s):  
Vitalij Kolodynskij ◽  
Pranas Baltrėnas
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxides ◽  
Plasma Coating ◽  
Air Purification ◽  
Average Flow Rate ◽  
Cleaning Efficiency ◽  
Average Flow ◽  
Air Cleaning ◽  
Air Stream ◽  
Cleaning Device

The present catalytic air purification device–air cleaning device is capable to reduce nitrogen oxide sand carbon monoxide concentrations in polluted air stream and to achieve high cleaning efficiency. The principle of operation of catalytic air cleaning device is based on plasma coating formed catalysts usage. At high temperatures and oxygen concentrations in the experimental device channel, catalysts become active and reactions of conversion of pollutants start. In this research, the efficiency of cleaning the air from nitrogen oxides and carbon monoxide, by using plasma coating formed titanium oxide and copper-chromium catalysts, is carried out. 50% propane – 50% butane gas mix was used to generate polluted air flow. The maximum cleaning efficiency, cleaning the air of nitrogen oxides and carbon monoxide, reached 86% and 77%, when the average flow rate of polluted air was 0.10 m/s, oxygen concentration in II section of device was 0.5–0.6% and in I section – 0.1–0.2%. Nagrinėjamas įrenginys – katalitinis oro valymo įrenginys, mažinantis azoto oksidų ir anglies monoksido koncentracijas užterštame oro sraute. Katalitinis oro valymo įrenginys veikia naudodamas plazminiu purškimu suformuotus katalizatorius. Esant aukštai temperatūrai ir optimaliai deguonies koncentracijai įrenginio eksperimentiniame kanale, katalizatorių paviršius tampa aktyvus, ir vyksta sudėtingos teršalų konversijos reakcijos. Atliktuose tyrimuose nagrinėtas suminis titano oksido ir vario-chromo oksido katalizatorių, kurie buvo pagaminti plazminio purškimo metodu, srauto, užteršto azoto oksidais ir anglies monoksidu, valymo efektyvumas. Užterštam oro srautui sugeneruoti buvo naudojamas 50 % propano – 50 % butano dujų mišinys. Didžiausias valymo efektyvumas, valant orą nuo azoto oksidų ir anglies monoksido, atitinkamai siekė 86 % ir 77 %, esant 0,10 m/s vidutiniam užteršto srauto greičiui, 0,5–0,6 % deguonies koncentracijai II-ojoje įrenginio sekcijoje ir 0,1–0,2 % deguonies koncentracijai I-ojoje įrenginio sekcijoje.

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