Emission characteristics of ultrafine particles and volatile organic compounds in a commercial printing center
作者： Raghu Betha , Valliappan Selvam , Donald R. Blake , Rajasekhar Balasubramanian
DOI: 10.1080/10473289.2011.604549
关键词:
摘要: Laser printers are one of the common indoor equipment in schools, offices, and various other places. have recently been identified as a potential source air pollution. This study examines characteristics ultrafine particles (UFPs, diameter <100 nm) volatile organic compounds (VOCs) emitted from laser housed commercial printing center. The results indicated that apart printer type, age printers, number pages printed, UFPs also depend on ventilation conditions. It was found at reduced rates air, there rise concentration Interestingly, contribution to total submicrometer-sized observed be higher sampling point far away than immediate vicinity printer. Black carbon (BC) measurements showed good correlation (rs = 0.82) with size range 100-560 nm those diameters less 100 0.33 for 50-100 nm, rs -0.19 5.6-50 particles). Measurements VOCs center high levels m-, o-, p-xylene, styrene, ethylbenzenes during peak hours printing. Although toluene levels, its decreased compared nonoperating
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