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为研究文物保存微环境中的集成净化技术,联合采用光催化预处理和竹炭吸附技术净化低浓度的氮氧化物。研究了组合方式在不同光源下的净化效果,同时探讨了湿度对低浓度氮氧化物净化效果的影响。结果表明:在采用恰当的组合情况下,紫外线照射和可见光照射下,净化结果相差不大,最佳组合为光催化+竹炭+4A分子筛+竹炭的组合,NO和NO_2的出口浓度分别可降至1.98μg/m~3和1.80μg/m~3;而相对湿度增加,处理效果降低,但在相对湿度为60%情况下,仍可较长时间内稳定运行,保持出口NOx在4ng/g以下。综合实验结果,光催化联合竹炭吸附集成技术净化低浓度的氮氧化物效果良好,为今后文物保存微环境中的实际应用提供科学依据。
In order to study the integrated purification technology in the preservation of cultural relics in the microenvironment, photocatalytic pretreatment and bamboo charcoal adsorption are jointly used to purify the low-concentration nitrogen oxides. The purification effect of the combination method under different light sources was studied, and the effect of humidity on the purification effect of low concentration nitrogen oxides was also discussed. The results showed that under the appropriate combination conditions, the results of UV-Vis irradiation and UV-Vis irradiation did not differ significantly. The best combination of photocatalytic + bamboo charcoal + 4A zeolite + bamboo charcoal combination could reduce the concentrations of NO and NO 2 to 1.98μg / m ~ 3 and 1.80μg / m ~ 3 respectively; while the relative humidity increased, the treatment effect decreased, but at 60% relative humidity, it could still operate stably for a long time, keeping the NOX below 4ng / g . The comprehensive experimental results show that the photocatalytic combined with bamboo charcoal adsorption integrated technology has a good effect of purifying low concentration of nitrogen oxides and provides a scientific basis for the practical application of cultural relics preservation microenvironment in the future.