Real-time monitoring of toxic components from fine dust air pollutant samples by utilizing spark-induced plasma spectroscopy.
Real-time monitoring of toxic components from fine dust air pollutant samples by utilizing spark-induced plasma spectroscopy.
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DOI：
10.1016/j.chemosphere.2020.127237
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发表时间：
2020-06
期刊：
影响因子：
8.8
通讯作者：
Jun-Ho Yang;Jaehun Jung;J. Ryu;J. Yoh
中科院分区：
文献类型：
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作者：
Jun-Ho Yang;Jaehun Jung;J. Ryu;J. Yoh
最近，工业废弃物和农业废弃物中分别含有重金属和铵离子（NH4+）的细尘污染日益受到关注。在目前的研究中，提出了一种创新和有效的技术，用于使用等离子体发射光谱对有毒细粉尘成分进行实时定量监测，作为旨在减少粉尘污染的应急准备计划的补充。针对有毒污染物，研制了一种新型火花诱导等离子体光谱（SIPS）装置，该装置可控制等离子体的频率和大小。SIPS利用施加的电压高于电极周围的环境电压时，以低电流从高电压放电产生等离子体。该装置的检出限比激光诱导等离子体光谱（LIPS）提高了4.3倍。将该小型传感装置与一种新的定量分析方法相结合，用于测量空气污染中细尘中重金属和氨分子的浓度。根据各元素的等离子体连续衰变时间，对时间分辨等离子体发射信号进行积分，定量测量0.1 μg/m3的组成的微小变化。本研究结果可以启发未来利用SIPS对空气中细尘污染物进行实时监测的研究，并通过一种新的定量分析方法提高灵敏度。
A growing modern-day concern is fine dust air pollution that contains heavy metals and ammonium ions (NH4+) from industrial and agricultural waste sources, respectively. In the current study, the development of an innovative and effective technique for real-time, quantitative monitoring of toxic fine dust components using plasma emission spectroscopy is presented as a complement to emergency preparedness plans aimed at reducing dust pollution. A novel spark-induced plasma spectroscopic (SIPS) device that can control the frequency and magnitude of plasma was developed for the toxic pollutants in this work. SIPS utilizes an electrical discharge from a high voltage at a low current to produce plasma when the applied voltage is higher than the ambient voltage surrounding the electrodes. The detection limit of this setup was enhanced by a factor of 4.3 over laser-induced plasma spectroscopy (LIPS). This compact sensing device was used in combination with a new quantitative analytical method to measure the concentration of heavy metals and ammonia molecules in fine dust air pollution. By integrating the time-resolved plasma emission signals that were based on the plasma continuum decay time of each element, quantitative measurements of the minute changes in composition of 0.1 μg/m3were conducted. The findings of this study could inspire future research on the use of SIPS for monitoring airborne fine dust pollutants with better sensitivity in real-timeviaa new quantitative analytical method.