부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.scitotenv.2009.06.044 Byline: Tafeng Hu (a)(b)(c), Shuncheng Lee (c), Junji Cao (a)(b), Judith C. Chow (b)(d), John G. Watson (b)(d), Kinfai Ho (c), Wingkei Ho (c), Bo Rong (e), Zhisheng An (b) Keywords: Total suspended particles; Indoor air; Visitor number; SEM-EDX; Museum Abstract: Daytime and nighttime total suspended particulate matters (TSP) were collected inside and outside Emperor Qin's Terra-cotta Museum, the most popular on-site museum in China, in winter 2008. The purpose of this study was to investigate the contribution of visitors to indoor airborne particles in two display halls with different architectural and ventilating conditions, including Exhibition Hall and Pit No.1. Morphological and elemental analyses of 7-day individual particle samples were performed with scanning electron microscopy and energy dispersive X-ray spectrometer (SEM-EDX). Particle mass concentrations in Exhibition Hall and Pit No.1 were in a range of 54.7-291.7[mu]gm.sup.-3 and 95.3-285.4[mu]gm.sup.-3 with maximum diameters of 17.5[mu]m and 26.0[mu]m, respectively. In most sampling days, daytime/nighttime particle mass ratios in Exhibition Hall (1.30-3.12) were higher than those in Pit No.1 (0.96-2.59), indicating more contribution of the tourist flow in Exhibition Hall than in Pit No. 1. The maximum of particle size distributions were in a range of 0.5-1.0[mu]m, with the highest abundance (43.4%) occurred in Exhibition Hall at night. The majority of airborne particles at the Museum was composed of soil dust, S-containing particles, and low-Z particles like soot aggregate and biogenic particles. Both size distributions and particle types were found to be associated with visitor numbers in Exhibition Hall and with natural ventilation in Pit No.1. No significant influence of visitors on indoor temperature and relative humidity (RH) was found in either display halls. Those baseline data on the nature of the airborne particles inside the Museum can be incorporated into the maintenance criteria, display management, and ventilation strategy by conservators of the museum. Author Affiliation: (a) Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China (b) SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710075, China (c) Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China (d) Division of Atmospheric Sciences, Desert of Research Institute, Reno, USA (e) Emperor Qin's Terra-cotta Warriors and Horses Museum, Xi'an, China Article History: Received 12 December 2008; Revised 15 June 2009; Accepted 25 June 2009