Development of an activated carbon filter to remove NO2 and HONO in indoor air

Journal of Hazardous Materials
Jun Young YooPetros Koutrakis

Abstract

To obtain the optimum removal efficiency of NO2 and HONO by coated activated carbon (ACs), the influencing factors, including the loading rate, metal and non-metal precursors, and mixture ratios, were investigated. The NOx removal efficiency (RE) for K, with the same loading (1.0 wt.%), was generally higher than for those loaded with Cu or Mn. The RE of NO2 was also higher when KOH was used as the K precursor, compared to other K precursors (KI, KNO3, and KMnO4). In addition, the REs by the ACs loaded with K were approximately 38-55% higher than those by uncoated ACs. Overall, the REs (above 95%) of HONO and NOx with 3% KOH were the highest of the coated AC filters that were tested. Additionally, the REs of NOx and HONO using a mixing ratio of 6 (2.5% PABA (p-aminobenzoic acid)+6% H3PO4):4 (3% KOH) were the highest of all the coatings tested (both metal and non-metal). The results of this study show that AC loaded with various coatings has the potential to effectively reduce NO2 and HONO levels in indoor air.

References

Oct 1, 1977·Environmental Research·R EhrlichD E Gardner
Jul 16, 1977·British Medical Journal·R J MeliaA V Swan
Feb 1, 1991·Journal of the Air & Waste Management Association·M BrauerJ D Spengler
Dec 1, 1968·Archives of Environmental Health·R Ehrlich, M C Henry
Jul 1, 1983·Science·J D Spengler, K Sexton
May 1, 1995·American Journal of Respiratory and Critical Care Medicine·T R RasmussenS Kjaergaard
Feb 12, 2002·Environmental Health Perspectives·Kiyoung LeeJohn D Spengler
Aug 28, 2002·Journal of Environmental Monitoring : JEM·M I Khoder
Jul 5, 2008·Journal of Hazardous Materials·Jing YangChuan Liu
Feb 13, 2010·Journal of Hazardous Materials·Shohei YamashitaTakashi Amagai
Apr 29, 2010·Journal of Exposure Science & Environmental Epidemiology·Wonho YangWookhee Choi
Jan 20, 2011·Journal of the Air & Waste Management Association·Seung Shik Park, Sung Yong Cho
May 25, 2012·Journal of Hazardous Materials·Hongyan LiGuangke Li

❮ Previous
Next ❯

Citations

Mar 9, 2021·Journal of Hazardous Materials·Thomas PettitPeter J Irga

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Pediatric Allergy and Immunology : Official Publication of the European Society of Pediatric Allergy and Immunology
A K Munir
Water Science and Technology : a Journal of the International Association on Water Pollution Research
B L T LauI Tejedor
Hua xi yi ke da xue xue bao = Journal of West China University of Medical Sciences = Huaxi yike daxue xuebao
C J Sun, Z W Yang
The Journal of Allergy and Clinical Immunology
W M Alberts
© 2022 Meta ULC. All rights reserved