环境工程学报2026，Vol.20Issue(5)：1612-1620,9.DOI:10.12030/j.cjee.202508101
铅锌熔融炉渣脱硫及与NaClO2协同氧化NOx特性
Desulfurization of Lead-zinc molten slag and its synergistic oxidation characteristics of NOx with NaClO2
摘要
Abstract
Sulfur dioxide(SO2)and nitrogen oxides(NOx)emitted from fossil-fuel combustion and non-ferrous smelting present serious environmental and health risks.In this study,depleted lead-zinc molten slag was employed as a low-cost sorbent for wet flue-gas desulfurization,and the resulting desulfurization tail liquid for NOx purification,achieving an integrated utilization of metallurgical waste.The lead-zinc slag exhibited effective desulfurization,and its tail liquid combined with NaClO2 delivered optimal NOₓ removal.Factors including NaClO2 concentration,reaction temperature,flue gas flow rate,oxygen concentration,NOx concentration,and pH on removal efficiency were investigated.Under the optimized conditions of 2.5 mmol·L-1 NaClO2,45 ℃,200 mL·min-1 gas flow,10%O2,0.03%NOx and pH=6,the NOx removal efficiency reached 97.24%.Metal ion experiments tests revealed that synergistic effects of Fe3+,Zn2+,Mn2+,and K+with NaClO2,with Fe3+showing the most pronounced enhancement.Fe3+enhanced the oxidative absorption of NOx by promoting the decomposition of NaClO2 to generate highly oxidizing species such as ClO2.关键词
铅锌熔融炉渣/催化氧化/脱硫/氮氧化物转化Key words
lead-zinc molten slag/catalytic oxidation/desulfurization/conversion of nitrogen oxides分类
资源环境引用本文复制引用
刘佳雯,朱涵,孙丽娜,李凯,孙鑫,马懿星..铅锌熔融炉渣脱硫及与NaClO2协同氧化NOx特性[J].环境工程学报,2026,20(5):1612-1620,9.基金项目
国家重点研发计划课题(2022YFC3901604) （2022YFC3901604）
贵州省科技成果转化计划项目(黔科合成果(2025)重大008) （黔科合成果(2025）
