摘要
使用原位漫反射红外傅里叶变换光谱(DRIFTS)研究了SO_2在α-Al_2O_3、TiO_2、CaO和α-Fe_2O_3颗粒物表面的非均相反应,考察了紫外光光照(波长约365 nm)对SO_2在不同氧化物表面反应的影响.结果表明,无紫外光照射条件下,SO_2在TiO_2、α-Al_2O_3、CaO颗粒物表面反应的主要产物为亚硫酸盐;有紫外光照射条件下,SO_2在TiO_2、α-Al_2O_3、CaO颗粒物表面反应的主要产物为硫酸盐;但紫外光照射对SO_2在α-Fe_2O_3表面的反应并没有明显的影响.推测机理可能是光照促进了颗粒物表面的亚硫酸盐向硫酸盐的转化.
Heterogeneous reactions of SO2 on α-Al2O3,TiO2,CaO and α-Fe2O3 particle surfaces were studied using in situ diffuse reflectance infrared Fourier transform spectroscopy( DRIFTS). The influence of UV radiation( λ = ca. 365 nm) on the reaction of SO2 on different mineral oxides were investigated. The main product of the heterogeneous reactions of SO2 on TiO2,α-Al2O3 and CaO particles was sulfite in dark condition and sulfate in the presence of UV illumination,respectively. The UV illumination showed no obvious impact on the reaction on α-Fe2O3. The mechanism was proposed that the light may promote the conversion of sulfite to the sulfate on the surface of the particles.
作者
王铃
马庆鑫
贺泓
WANG Ling1,2, MA Qingxin2, HE Hong2(1. Resources and Environmental Researeh Academy, North China Eleetrie Power University, Beijing 102206 2. Center for Air Pollution Control Technology, Research Center for Eeo- Environmental Sciences, Chinese Academy of Sciences, Beijing 10008)
出处
《环境科学学报》
CAS
CSCD
北大核心
2018年第3期1155-1162,共8页
Acta Scientiae Circumstantiae
基金
国家重点研发计划(No.2016YFC0202700)
国家自然科学基金(No.41673004
91744205)~~