【摘要】：基于金汞齊-冷原子熒光法開發(fā)了一套小型氣態(tài)元素汞(TGM)在線監(jiān)測儀,該儀器采用真空系統(tǒng)設(shè)計,體積小、重量輕,可實現(xiàn)無人值守自動運行,適用于車載移動觀測.實驗測試表明,儀器在典型時間分辨率4 min條件下的檢出限能達到0.2 ng·m~(-3),優(yōu)于商品化大氣汞分析儀;且具有較高的精密度,標(biāo)氣重復(fù)實驗相對偏差2%,工作曲線擬合優(yōu)度R~20.999.將該儀器搭載于機動車內(nèi),對北京市四、五環(huán)路沿線氣態(tài)元素汞進行了移動監(jiān)測,測得四環(huán)路與五環(huán)路TGM平均濃度分別為2.25、2.63 ng·m~(-3).該儀器可提供高時空分辨率的大氣汞濃度數(shù)據(jù),可為氣態(tài)元素汞的監(jiān)測和污染控制提供技術(shù)支持.
[Abstract]:Based on the method of gold amalgam and cold atomic fluorescence, a small on-line monitoring instrument for gas elemental mercury (TGM) is developed. The instrument is designed by vacuum system, which is small in volume and light in weight. It can be operated automatically and unattended. It is suitable for vehicle-mounted mobile observation. The experimental results show that the detection limit of the instrument is 0.2 ng m ~ (-3) at a typical time resolution of 4 min, which is superior to that of commercial atmospheric mercury analyzer. It also has high precision, relative deviation of standard gas repeated experiment 2 and excellent fitting degree of working curve RV 20.999. In this paper, the gas elemental mercury along the fourth and Fifth Ring Road in Beijing was monitored by this instrument. The average concentration of TGM in the fourth Ring Road and the Fifth Ring Road was 2.25 ~ 2.63 ng m ~ (-3), respectively. The instrument can provide atmospheric mercury concentration data with high spatial and temporal resolution and provide technical support for monitoring and pollution control of gaseous elemental mercury.
【作者單位】： 環(huán)境模擬與污染控制國家重點聯(lián)合實驗室北京大學(xué)環(huán)境科學(xué)與工程學(xué)院;
【基金】：國家高技術(shù)研究發(fā)展計劃(No.2014AA06A507)~~
【分類號】：X851

【相似文獻】

相關(guān)重要報紙文章 前1條

1 記者 張晶;我國首個高時空分辨率碳同化反演系統(tǒng)發(fā)布[N];科技日報;2014年

相關(guān)碩士學(xué)位論文 前1條

1 陳哲夫;高時空分辨率湖泊濕地水體水質(zhì)信息重構(gòu)與變化檢測[D];中南林業(yè)科技大學(xué);2016年

，

本文編號：2369809