摘要
选择2006年4月30日至5月10日,结合"五一"长假前后参观游客数量的变化,对莫高窟室内外总悬浮颗粒物(TSP)和污染气体进行了为期2周的加强连续观测,获得了莫高窟室内外大气环境污染的初步数据.在观测期内,室外、非开放洞窟[320窟]和开放洞窟[257窟]大气TSP的日平均质量浓度分别为1138.4μg.m-3、228.5μg.m-3和286.4μg.m-3.TSP中水溶性离子分析表明,Ca2+、SO42-、Na+和Cl-是水溶性无机离子的主要组分,且室外水溶性离子浓度高于窟内水平,长假前后水溶性组分浓度有明显变化.碳气溶胶分析显示,开放洞窟相对于室外和非开放洞窟具有较高的碳气溶胶的浓度水平.获得了研究区NH3和气态HNO3的浓度水平.游客数量对TSP质量浓度,水溶性离子浓度,碳气溶胶浓度和污染气体均有显著影响,旅游高峰期污染物质浓度显著增高.
Mass concentrations, water-soluble ions, and total carbon （TC） of total suspended particle （TSP） were investigated from both indoor and outdoor conditions in Mogao Grottoes, Dunhuang, from April 30 to May 10, 2006. The average outdoor mass concentration was 1138.4μg· m^-3, while the indoor average mass concentrations were relatively very lower, about 228.5μg· m^-3 and 286.4μg· m^-3 for non-opening time and opening time, respectively. The water-soluble ions are predominated by Ca^2＋ , SO4^2- , Na^＋ and Cl^- . The concentrations of watersoluble ions from outdoor aerosols were higher than those from indoor aerosols and the concentrations of water-soluble component varied significantly during the long-term vacation period. The TC concentrations collected during the opening time were higher than those collected during the non-opening time and those collected from the outside of the Grottoes. The concentrations of NH3 and HNO3 gasses were also obtained in this study. Our study showed that there was a remarkable increase in the pollution material concentrations at the peak of the tourist populations, indicating the significant influence from the tourists.
出处
《中国科学院研究生院学报》
CAS
CSCD
2007年第5期612-618,共7页
Journal of the Graduate School of the Chinese Academy of Sciences
基金
国家自然科学基金项目(NSFC40121303
40675081)资助
关键词
莫高窟
总悬浮颗粒物
水溶性离子
碳气溶胶
污染性气体
Dunhuang Mogao Grottoes, TSP, water-soluble ion, carbonaceous aerosols, harmful air
