Abstract
Wet scrubbers are one of the most important air-pollution control devices (APCDs) for the simultaneous removal of various acidic gases and particulates. This study was conducted on a lab-scale self-designed wet scrubber (WSB) system for the treatment of particle-bound water-soluble ions emitted from cooking fumes with/without adding bio-solution (namely, NOE-7F). The concentration and composition of eight particle-bound water-soluble ions in the three situations were determined. Three situations include (i) particle-bound water soluble ions in the cooking fume exhaust without applying WSB or NOE-7F treatment; (ii) treating particle-bound water soluble ions in the cooking fume exhaust with applying WSB without adding NOE-7F; and (iii) treating particle-bound water soluble ions in the cooking fume exhaust with applying WSB and adding NOE-7F_50X/100X/200X. The particle-bound water-soluble ions samples were collected and then chemical analysis of the eight water soluble ionic species (Na(superscript +), K(superscript +), NO2(superscript -), Mg(superscript 2+), Ca(superscript 2+), Cl(superscript -), NO3(superscript -), and SO4(superscript 2-)) was conducted by ion chromatography. The result indicated that adding NOE-7F bio-solution by diluted 200 folds into wet scrubber water and forming blended circulation water has the good removal efficiencies and reaches removal efficiencies higher than 80% for both Na(superscript +) (86.6%) and Cl(superscript -) (85.9%). The addition of NOE-7F in the influent water had the enhanced effect on the particle-bound water-soluble ions removal and mainly promoted highly the hydrophilicity of particle-bound water-soluble ions in the water scrubber. The combination of both water scrubber and NOE-7F addition has a high potential for practical application.
Highlights
Human activity-generated aerosols, including emissions from outdoor and indoor sources, are the dominant contributors of ambient particulate matter (PM) in urban environments (Geiss et al, 2010; Hsieh and Chen, 2010; Cao et al, 2011; Hussein et al, 2011; Kim et al, 2011; Peng et al, 2011; Shakya et al, 2010; Stone et al, 2011)
This study was conducted on a lab-scale self-designed wet scrubber (WSB) system for the treatment of particle-bound water-soluble ions emitted from cooking fumes with/without adding bio-solution
More insightful experimental runs on such topics could be suggested. It revealed that adding natural organic enzyme-7F (NOE-7F) bio-solution diluted ranged from 50–200 folds into wet scrubber water and forming blended circulation water is a practical way to enhance the removal efficiencies of particle-bound water-soluble ions from cooking fume
Summary
Human activity-generated aerosols, including emissions from outdoor and indoor sources, are the dominant contributors of ambient particulate matter (PM) in urban environments (Geiss et al, 2010; Hsieh and Chen, 2010; Cao et al, 2011; Hussein et al, 2011; Kim et al, 2011; Peng et al, 2011; Shakya et al, 2010; Stone et al, 2011). Many atmospheric aerosol mass and inorganic water-soluble species content in the nano/micron size range. For the photo etching and clean room environments, the concentrations and characteristics of major components in inorganic gases and fine particles. Aerosol and Air Quality Research, 11: 508–518, 2011 were measured at the photo and etch clean room areas in a Taiwan semiconductor factory (Lin et al, 2010). The inorganic species account for 56% and 62% of the particulate mass, respectively, at the photo and etch areas. In the last few years, various investigations have been carried out to quantify the cooking oil fumes emission from both indoor and outdoor ambient environments (He et al, 2004) Those reports indicates that cooking emissions may contribute significantly to atmospheric organic/inorganic particles in urban environment (Cass, 1998; He et al, 2004). The PM2.5 mass determined in their study revealed the following trend: background (15.4 ȝg/m3) < steaming (72.3 ȝg/m3) < boiling (91.6 ȝg/m3) < stir-frying (120 ȝg/m3) < pan-frying (130 ȝg/m3) < deep-frying (209 ȝg/m3)
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