Ning Ping, Guo Xiaolong, Wang Xueqian, Wang Ping, Ma Yixing, Lan Yi
a Faculty of Environmental Science and Engineering , Kunming University of Science and Technology , Kunming , 650500 , People's Republic of China.
Environ Technol. 2015;36(21):2691-701. doi: 10.1080/09593330.2015.1043355. Epub 2015 May 22.
A tubular resistance furnace was used as a reactor to simulate mercury and arsenic in smelter flue gases by heating mercury and arsenic compounds. The flue gas containing Hg(2+), Hg(0) and As was treated with ammonium sulphide. The experiment was conducted to investigate the effects of varying the concentration of ammonium sulphide, the pH value of ammonium sulphide, the temperature of ammonium sulphide, the presence of SO2 and the presence of sulphite ion on removal efficiency. The prepared adsorption products were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy. The results showed that the optimal concentration of ammonium sulphide was 0.8 mol/L. The optimal pH value of ammonium sulphide was 10, and the optimal temperature of ammonium sulphide was 20°C.Under the optimum conditions, the removal efficiency of Hg(2+), Hg(0) and As could reach 99%, 88.8%, 98%, respectively. In addition, SO2 and sulphite ion could reduce the removal efficiency of mercury and arsenic from simulated flue gas.
采用管式电阻炉作为反应器，通过加热汞和砷化合物来模拟冶炼厂烟气中的汞和砷。用硫化铵处理含Hg(2+)、Hg(0)和As的烟气。进行该实验以研究改变硫化铵浓度、硫化铵pH值、硫化铵温度、SO2的存在以及亚硫酸根离子的存在对去除效率的影响。采用傅里叶变换红外光谱、X射线衍射、X射线光电子能谱和扫描电子显微镜对制备的吸附产物进行表征。结果表明，硫化铵的最佳浓度为0.8 mol/L。硫化铵的最佳pH值为10，硫化铵的最佳温度为20°C。在最佳条件下，Hg(2+)、Hg(0)和As的去除效率分别可达99%、88.8%、98%。此外，SO2和亚硫酸根离子会降低模拟烟气中汞和砷的去除效率。
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