องค์ประกอบธาตุโลหะและปริมาณความเข้มข้นในฝุ่นละอองขนาดเล็ก ภายในห้องพักผู้ป่วยวิกฤตของโรงพยาบาล

• Main Author: แสงสุรีย์ ศรีสะอาด
• Other Authors: ทรรศนีย์ พฤกษาสิทธิ์
• Format: Theses and Dissertations
• Language: Thai
• Published: จุฬาลงกรณ์มหาวิทยาลัย 2016
• Subjects: ฝุ่น > การวัด; โรงพยาบาล; Dust > Measurement; Hospitals
• Online Access: https://digiverse.chula.ac.th/Info/item/dc:56806
• Institution: Chulalongkorn University

The objective of this study was to investigate the concentrations of PM2.5, PM2.5-10 and PM10 in the pediatric special care room, the negative and positive isolation room of the hospital locating in the inner city of Bangkok. Qualitative analysis of element in the particulate matters was done by synchrotron radiation (µ-SXRF) technique. Quantitative analysis using ICP-MS was chosen for measuring 13 elements including Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, Sb and Pb. Principal Component Analysis (PCA) and Enrichment Factor (EF) calculation was used for identifying the possible source of trace elements. The result showed that the 24-hr average concentrations of PM2.5 PM2.5-10 and PM10 in the pediatric special care room were in the range of 1.24-10.80, 2.74-11.37 and 5.13-14.84 µg/m3, respectively. For the negative isolation room those ranges of 2.03-3.05, 5.32-5.44 and 7.37-8.37 µg/m3, respectively, were found. Whilst in the positive isolation room, the concentration ranges of 1.64-2.70, 4.37-4.58 and 6.01-9.44 µg/m3, respectively, were obtained. The result of qualitative analysis in PM2.5 and PM2.5-10 from all three rooms revealed that only Al could be determined in indoor area, while Cu and Ni could be found at outdoor, and Si, Cl, K, Ti, Fe, Mn, Zn and Cr were found either indoor or outdoor. When comparing the elements identifiable in indoor particulate matter with the elements found in Curvularia lunata (black mold) and Fusarium spp. (white mould), Cl, K, Ti, Fe, Zn, Cr, and Mn, were found the same as in black mold, while Cl, K, Ti, Fe, Zn and Cr were presented the same as in white mold. The dominant species of the elements found in this study were Al, Fe and Zn which gave the concentration higher than 10 ng/m3. The elements with the concentration range of 1-10 ng/m3 were Cr, Mn, Ni and Cu, whereas V, Co, As, Cd, Sb and Pb were able to determine with the wide range from 0.02 to 73.95 ng/m3. The analysis results of PCA and EF illustrated that the sources of measurable trace elements in PM2.5 and PM2.5-10 in all pediatric care rooms could be from 1) natural sources, existing generally in the soil and rock from the earth s crust and diffused in the air such as As, V, Al and Fe , 2) anthropogenic sources which contaminated from automobiles, fuel combustion and industrial emission including Cu, Pb, Ni, Cr, Co, Cd, Zn, Sb and Mn.