Abstract:Effects of minor 2-EH (2-ethyl-1-hexanol) surfactant on improving the inactivation ability of LiCl liquid desiccant on two species of resistant mold spores in air conditioning systems, A. niger and P. citrinum were studied. The results showed that minor addition of 2-EH (50×10-6~300×10-6) substantially enhanced the mold inactivation performance of LiCl liquid desiccant with an efficiency improvement of 12.6 fold. By adding only 300×10-6 of 2-EH, the A. niger spores were effectively inactivated (with efficacy of around 100%) by the dilute LiCl aqueous solution (20% mass concentration) instead of the concentrated 40% LiCl solution. The improvement was particularly significant for the dilute LiCl solution, which considerably reduced the essential solution concentration for effective mold inactivation. SEM analysis showed that the addition of minor 2-EH accelerates the cell structure damage and collapse of the mold spores exposed in the LiCl solution. The results may significantly improve the mold inactivation performance of the LiCl liquid desiccant air-conditioning system and reduce the risks of mold aerosol transmission.
李瑞青, 杨自力, 谷雨倩, 游雨昕, 凌晨, 张敏歆. 表面活性剂强化LiCl溶液灭活空调霉菌的研究[J]. 中国环境科学, 2022, 42(7): 3443-3449.
LI Rui-qing, YANG Zi-li, GU Yu-qian, YOU Yu-xin, LING Chen, ZHANG Min-xin. Study of minor 2-EH surfactant on promoting LiCl liquid desiccant to inactivate mold in air-conditioning systems. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(7): 3443-3449.
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