Guo Xin, Zheng Chu-guang, Cheng Dan
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
Huan Jing Ke Xue. 2006 Apr;27(4):631-4.
An emissions study for arsenic was conducted at a 300 MW coal-fired plant equipped with an electrostatic precipitator. The input and output streams such as coal, slag, ESP ash, and flue gas containing the post-ESP particulates were collected. Gaseous arsenic was sampled using EPA method 29 and the arsenic concentrations in the samples were measured using inductively coupled plasma atomic emission spectrometry (HG-ICP-AES). The mass balance recovery of arsenic estimated in this study was 87.2%. Arsenic concentration in stack gas was 2.5 microg/m3. Approximately 0.53% of the coal-derived arsenic was incorporated into slag, 84.6% of the arsenic was found on the fly ash collected by electrostatic precipitators, and 2.16% was found in the vapor phase. The relationship between arsenic concentration and ash particle size was also assessed, and arsenic is significantly concentrated in the small sized particles.
在一座配备静电除尘器的300兆瓦燃煤电厂开展了一项砷排放研究。收集了诸如煤炭、炉渣、电除尘器灰以及含有电除尘器后颗粒物的烟道气等输入和输出物流。采用美国环境保护局（EPA）方法29对气态砷进行采样，并使用电感耦合等离子体原子发射光谱法（HG-ICP-AES）测量样品中的砷浓度。本研究估算的砷质量平衡回收率为87.2%。烟囱气体中的砷浓度为2.5微克/立方米。约0.53%的源自煤炭的砷进入炉渣，84.6%的砷存在于静电除尘器收集的飞灰中，2.16%的砷存在于气相中。还评估了砷浓度与灰颗粒大小之间的关系，结果表明砷在小颗粒中显著富集。
