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

作者：Yo Jun Young; Park Chan Jung; Kim Ki Yeong; Son Youn Suk^*; Kang Choong Min; Wolfson Jack M; Jung In Ha; Lee Sung Joo; Koutrakis Petros

来源：Journal of Hazardous Materials, 2015, 289: 184-189.

DOI：10.1016/j.jhazmat.2015.02.038

• HONO
• NO2
• Indoor air
• Activated carbon filter
• Air cleaner
• IAQ

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 NO 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 NO with 3% KOH were the highest of the coated AC filters that were tested. Additionally, the REs of NO 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.

• 出版日期2015-5-30