基于等离子体净化的空气黑曲霉气溶胶  

Deactivation Characteristics and Quantitative Evaluation of Aspergillus Niger Aerosol in the Air Based on Plasma Purification

作　　者：杜晨秋 路冰洁 李百战 郭芯竹 DU Chenqiu;LU Bingjie;LI Baizhan;GUO Xinzhu(School of Civil Engineering,Chongqing University,Chongqing 400045,China)

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《建筑科学》2025年第2期184-193,共10页Building Science

基　　金：国家自然科学基金面上项目“基于动态温湿度影响的真菌气溶胶吸入暴露致儿童哮喘的病理机制及健康干预评价”(52278088)。

摘　　要：现有空气净化技术多基于标准热环境工况,温度和相对湿度变化对微生物净化效率的影响尚缺乏量化研究。本研究以等离子体净化技术为参考,实验测试了温度13~33℃、相对湿度25%~85%范围内,等离子体净化对室内典型黑曲霉气溶胶的杀菌效果。结果显示,等离子体净化可以有效降低空气黑曲霉气溶胶浓度,且在23℃/55%时效果最好,相比自然沉降的浓度差值达728.52 CFU/m^(3)。基于Logistic模型分别建立了相对湿度为55%和温度为23℃的等离子体灭活黑曲霉的一级动力学模型,揭示了灭活速率随净化时间呈先上凸(“肩部”效应)、后逐渐下降至稳定(“拖尾”效应)变化特性;引入响应面二次多项式模型量化了温湿度及二者交互作用对等离子体灭活黑曲霉的影响规律及适宜净化环境(相对湿度55%,或温度23℃)。结果可为空气净化效率评价和用户选择适宜空气净化技术提供一定指导。The efficiency of the current air purification technologies on microbial aerosols is mostly based on standardized thermal conditions.There is still a lack of quantitative research on the impact of dynamic changes in temperature and relative humidity on purification efficiency.This study took plasma purification as an example and experimentally tested the purification effect of plasma on typical Aspergillus niger aerosols indoors,within the temperature range of 13~33℃and relative humidity range of 25%~85%.The results showed that plasma purification can effectively reduce the concentration of Aspergillus niger aerosols in the air,and the highest efficiency was found at 23℃/55%,with a concentration difference of 728.52 CFU/m^(3) compared to natural settlement.First-order kinetic models for plasma inactivating Aspergillus niger were established based on the logistic model,at relative humidity of 55%and a temperature of 23℃.The models revealed that the rates of mold inactivation exhibited an upward convexity(“shoulder”effect),followed by a gradual decrease to stability(“tail”effect)with purification time.Further,a response surface quadratic polynomial model was adopted to quantify the impacts of temperature,humidity,and their interaction on plasma purification of Aspergillus niger,as well as the suitable purification environment(relative humidity of 55%,or a temperature of 23℃).The results can provide guidance for air purification efficiency evaluation and the selection of suitable air purification technologies by users.

关 键 词：空气净化 等离体子 霉菌气溶胶 温湿度 杀菌效果 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]