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Open AccessArticle

Evaluation of Policy Influence on Long-Term Indoor Air Quality in Emperor Qin’s Terra-Cotta Museum, China

by 1,2,3, 1,*, 1, 1,4,*, 1, 1, 5 and 3
1
Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Key Scientific Research Base of Ancient Polychrome Pottery Conservation, SACH, Emperor Qin Shihuang's Mausoleum Site Museum, Xi'an 710600, China
4
Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China
5
Shaanxi Institute for the Preservation of Cultural Heritage, Xi'an 710075, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Guohui Li and Robert W. Talbot
Atmosphere 2015, 6(4), 474-489; https://doi.org/10.3390/atmos6040474
Received: 22 January 2015 / Revised: 16 March 2015 / Accepted: 19 March 2015 / Published: 3 April 2015
(This article belongs to the Special Issue Sources, Formation and Impacts of Secondary Aerosol)
Long-term measurement results of indoor air quality (IAQ) from 1989 to 2013 inside Pit No. 1, the largest display hall in Emperor Qin’s Terra-cotta Museum (QTM), were used to evaluate the effectiveness of measures for conservation environment improvement of antiques. By comparing the results of sampling campaigns in 2013 with databases in 1989, 2004–2005, 2006–2007 and 2011, seasonal and inter-annual variation in microclimate, aerosol chemical compositions and gaseous pollutant concentrations were incorporated in estimating the probable influences of the management of the surroundings, tourist flow, excavation and restoration tasks and renovation and/or new construction work on IAQ in the QTM. After the implementation of the environmental policies in 1990s, a significant decrease of indoor particulate matter mass for the QTM was quantified. The mass concentrations of summer TSP decreased from 540.0 μg∙m−3 in 1994 to 172.4 μg∙m−3 in 2004, as well as the winter TSP decreased from 380.0 μg∙m−3 in 1994 to 312.5 μg∙m−3 in 2005. The mass concentrations of summer PM2.5 decreased from 108.4 μg∙m−3 in 2004 to 65.7 μg∙m−3 in 2013, as well as the winter PM2.5 decreased from 242.3 μg∙m−3 in 2005 to 98.6 μg∙m−3 in 2013. However, it is noted that potential hazards due to the fluctuant microclimate conditions, gaseous and secondary particulate acidic species in indoor air should still be considered to ensure the long-term preservation and conservation of the museum’s artifact collection. View Full-Text
Keywords: indoor air quality; environmental policy; terra-cotta warriors; museum indoor air quality; environmental policy; terra-cotta warriors; museum
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Li, H.; Hu, T.; Jia, W.; Cao, J.; Liu, S.; Huang, R.; Ma, T.; Xi, N. Evaluation of Policy Influence on Long-Term Indoor Air Quality in Emperor Qin’s Terra-Cotta Museum, China. Atmosphere 2015, 6, 474-489.

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