摘要
通过对比酸性水溶液、含Fe3 +的酸性水溶液及细菌菌液脱除SO2 的效果 ,研究了Fe3 +浓度、pH值和通气时间变化对脱硫率的影响 .实验表明 :酸性水溶液中SO2 的吸收仅为物理吸收 ;Fe3 +能催化氧化SO2 ,这种催化氧化效果随着Fe3 +浓度的升高、pH值的增大而变得明显 (pH值 2 0、Fe3 +1 5 g/L时 ,通气时间近 1 70min ,脱硫率仍高达 90 % ) ;细菌菌液脱硫的效果同样受Fe3 +浓度、pH值的影响 ;氧化亚铁硫杆菌不仅具有氧化Fe2 +的能力 ,还具有氧化S(Ⅳ )的能力 ,在Fe3 +浓度 1 5g/L ,pH值 1 5时效果最为明显 .
The desufurization in dilute sulfuric acid solution, acidic ferric solution, and microbial solution(Thiobacillus ferrooxidans) was studied in this paper. The concentration of ferric, pH value and time all affect the rate of desulfurization. The experimental results showed that in dilute sulfuric acid solution the absorption of SO 2 was a physical absorption. In acidic ferric solution, the ion of ferric can not only catalyze but also oxidize SO 2. The effects of desulfurization became obvious along with high concentration of ferric and pH value. Desulfurization rate was up to 90% when pH value was 2.0 and the concentration of ferric was 1.5g/L. In microbial solution, the effects were also influenced by the concentration of ferric and pH value. Thiobacillus ferrooxidans had an ability of oxiding the ion of ferrous and S(Ⅳ). The results of desulfurization was the best at the concentration of ferric 1.5g/L and pH 2.0.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第5期44-48,共5页
Environmental Science
基金
国家自然科学基金项目 (2 0 176 0 32 )
关键词
烟气脱硫
微生物法
氧化亚铁硫杆菌
flue gas desulfurization
microbiol method
thiobacillus ferrooxidans
