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| 兰州地铁站灰尘重金属的PMF模型源解析与累积特征研究 |
| Source Apportionment and Accumulation Characteristics of Heavy Metals in Dust from Lanzhou Metro Station by PMF Model |
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| DOI： |
| 中文关键词: 重金属 地表灰尘 源解析 PMF模型 地铁站 兰州 |
| 英文关键词: Heavy metals Ground dust Source apportionment PMF model Metro station Lanzhou |
| 基金项目:甘肃省科技计划基金资助项目（24JRRA530）；甘肃省绿洲资源环境与可持续发展重点实验室开放课题基金资助项目（GORS202102）；甘肃省高等学校科研基金资助项目（2023A-116） |
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| 中文摘要: |
| 通过在兰州地铁站站台布设11个调查样点，监测分析地表灰尘元素As、Cr、Cu、Mn、Ni和Pb累积特征及来源。结果表明：兰州地铁站站外和站内地表灰尘中As、Cr、Cu、Pb的平均值均高于甘肃省和兰州市土壤背景值；站内地表灰尘以Cr、Cu、Ni和Pb为主要污染物，站外污染以Cu和Pb为主，且站内地表灰尘重金属综合污染整体高于站外；源解析结果显示，站内地表灰尘重金属主要来源于交通源和人为污染源的混合源、工业源、交通源和大气沉降源的混合源，贡献率分别为300%、336%、364%，站外主要来源为交通源和大气沉降源的混合源、燃煤源和交通源的混合源、交通源，贡献率分别为387%、296%、317%。 |
| 英文摘要: |
| Setting 11 sampling sites on the platforms of Lanzhou metro station， the accumulation characteristics and sources of As， Cr， Cu， Mn， Ni， and Pb in ground dust were monitored. Results indicated that the average concentrations of As， Cr， Cu， and Pb in ground dust inside and outside the metro station were higher than the soil background values in Lanzhou and Gansu. Cr， Cu， Ni， and Pb were the main pollutants in ground dust inside the station， while Cu and Pb were dominated in ground dust outside the station. Heavy metal pollution in ground dust inside the station was higher than that outside the station. Source apportionment results showed that heavy metals in ground dust inside the station mainly came from the mixed sources of transportation and anthropogenic pollution， industrial source and the mixed sources of transportation and atmospheric deposition， with contribution rates of 30.0%， 33.6% and 36.4%， respectively. For the dust outside the 〖JP3〗station， 〖GK!86mm〗they were mainly from the mixed sources of transportation and atmospheric deposition， the mixed sources of coal combustion and transportation， and transporta tion source， with contribution rates of 38.7%， 296% and 31.7%， respectively. |
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