LiCl溶液对4种空调典型霉菌、细菌的抑制研究

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摘要为防止空调系统内霉菌、细菌的过度孳生，本文以空调系统内常见的黑曲霉（A. niger）、大肠埃希氏菌（E. coli）、金黄色葡萄球菌（S. aureus）、枯草芽孢杆菌（B. subtilis）为典型霉菌、细菌，基于纸片扩散法药敏试验，研究了空调除湿常用工质LiCl溶液对上述典型菌种的抑制作用及浓度影响规律.结果表明：在常见除湿浓度范围（35%~40%）内，LiCl溶液对上述4种典型菌种均有抑制作用；特别是对A. niger抑制效果最强，在15%的低浓度下即可产生明显抑制；其次为E. coli，而对S. aureus和B. subtilis的抑制相对较弱.此外，所得抑制效果随LiCl溶液浓度的提高而明显增强，特别是对A. niger和E. coli，溶液浓度与抑菌圈直径呈显著的正相关性.

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	谷雨倩
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	陈彬

关键词 ：除湿溶液, 空调系统, 纸片扩散法, 霉菌, 细菌, 抑制

Abstract：To prevent the excessive growth of molds and bacteria in the air-conditioning system (ACs), the inhibiting effects on common molds and bacteria in ACs of LiCl aqueous solution, a widely-used liquid desiccant in the ACs, were investigated in detail with the disk diffusion method. The four typical molds and bacteria, i.e., Aspergillus niger (A. niger), Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) and Bacillus subtilis (B. subtilis), were selected for the study. LiCl solution was found to show significant inhibiting effects on the four microbes under the usual concentration range (35%~40%) for air dehumidification. In particular, the most potent effect was on the A. niger, on which significant inhibiting effects were observed with the desiccant solution at a low concentration (merely 15%), followed by the gram-negative bacteria E. coli. In contrast, inhibiting effects on S. aureus and B. subtilis, the gram-positive bacteria, were relatively weaker. Furthermore, a positive correlation was found between the LiCl solution’s concentration and the diameter of inhibition zones of A. niger and E. coli, which indicated stronger inhibiting effects with the rising concentration of the LiCl solution.

Key words： liquid desiccant air-conditioning system disk diffusion tests mold bacteria inhibitation

收稿日期: 2020-01-06

PACS:	X172
	TU834

基金资助:上海市青年科技英才扬帆计划（19YF1401800）；国家自然科学基金资助项目（51578121）；中央高校基本科研业务费专项资金（2232018D3-36）；中国博士后基金（2018M630385）

通讯作者: 杨自力,讲师,ziliy@dhu.edu.cn E-mail: ziliy@dhu.edu.cn

作者简介: 谷雨倩(1996-),女,江苏扬州人,东华大学博士研究生,主要从事室内空气品质与微生物气溶胶净化方向的研究.发表论文2篇.

引用本文:

谷雨倩, 杨自力, 曹蓉, 钟珂, 陈彬. LiCl溶液对4种空调典型霉菌、细菌的抑制研究[J]. 中国环境科学, 2020, 40(8): 3636-3643. GU Yu-qian, YANG Zi-li, CAO Rong, ZHONG Ke, CHEN Bin. Inhibiting effects of LiCl aqueous solution on four typical molds and bacteria in the air-conditioning system. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(8): 3636-3643.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2020/V40/I8/3636

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