Department of Environmental Health Engineering, School of Health, Ardabil University of Medical Sciences, Ardabil, Iran.
Determinants of Health Research Center, Ardabil University of Medical Sciences, Ardabil, Iran.
Environ Sci Pollut Res Int. 2021 Aug;28(30):40771-40781. doi: 10.1007/s11356-021-13407-6. Epub 2021 Mar 26.
Dust is an important factor to indoor pollution that contains suspended particles and heavy metals. Since today, use of computer has become an essential part of human life. Therefore, this study aimed to compare the amount of heavy metals deposited on CRTs and LCDs and their risk assessment. Ten dust samples for each type of monitor were collected from CRT and LCD screens in accordance with the standard OSHA ID-125 and ID-206, wet filter wipe method. Concentrations of Pb, Hg, Cd, Cr, and Cu were measured by inductively coupled plasma-optical emission spectrometer. Exposure and risk assessment of these elements were estimated using USEPA's exposure parameters. The average concentrations of heavy metals in the dust on CRTs (0.82 mg/kg) were higher than LCD screens (0.69 mg/kg). Cr with 62.824% and Hg with 0.849% had the highest and lowest average concentration in both types of monitors. The non-carcinogenic risk and carcinogenicity indexes of CRT monitors were 0.0009, and 3.94 × 10 and for LCD monitors were 0.0008 and 2.94 × 10. In both monitors, ingestion is the main route to exposure with heavy metals. The average concentration of heavy metals in CRT dust. HI values for studied metals in dust of CRTs and LCDs were less than safe limit of 1. Because RI < 10, cancer risk of studied elements in dust can be ignored.
灰尘是室内污染的一个重要因素，其中含有悬浮颗粒和重金属。如今，计算机的使用已经成为人类生活的重要组成部分。因此，本研究旨在比较 CRT 和 LCD 上沉积的重金属数量及其风险评估。根据 OSHA ID-125 和 ID-206 标准，使用湿滤膜擦拭法从 CRT 和 LCD 屏幕上采集了每种显示器类型的 10 个灰尘样本。采用电感耦合等离子体发射光谱仪测量 Pb、Hg、Cd、Cr 和 Cu 的浓度。使用美国环保署的暴露参数估计这些元素的暴露和风险评估。CRT 上灰尘中重金属的平均浓度（0.82mg/kg）高于 LCD 屏幕（0.69mg/kg）。Cr 的平均浓度最高，为 62.824%，Hg 的平均浓度最低，为 0.849%。在这两种显示器中，非致癌风险和致癌指数分别为 0.0009 和 3.94×10和 0.0008 和 2.94×10。在这两种显示器中，摄入是重金属暴露的主要途径。CRT 灰尘中重金属的平均浓度。研究金属在 CRT 和 LCD 灰尘中的 HI 值均低于 1 的安全限值。由于 RI<10，可忽略研究元素在灰尘中的致癌风险。
