表面活性剂强化LiCl溶液灭活空调霉菌的研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (2052 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

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.

Key words： mold inactivation indoor air quality air-conditioning system surfactant

Received: 06 December 2021

PACS:	X172
	TU834

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LI Rui-qing
	YANG Zi-li
	GU Yu-qian
	YOU Yu-xin
	LING Chen
	ZHANG Min-xin

Cite this article:

LI Rui-qing,YANG Zi-li,GU Yu-qian等. Study of minor 2-EH surfactant on promoting LiCl liquid desiccant to inactivate mold in air-conditioning systems[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(7): 3443-3449.

URL:

http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I7/3443

[1]	张寅平,江亿,赵彬,等.空调系统生物污染防治方法概述[J].暖通空调, 2003,33(U06):6. Zhang Y P, Jiang Y, Zhao B, et al. Overview of disinfection methods of biologic pollution in HVAC systems[J]. HV&AC, 2003,33(U06):6.
[2]	Liu Z J, Ma S Y, Cao G Q, et al. Distribution characteristics, growth, reproduction and transmission modes and control strategies for microbial contamination in HVAC systems:A literature review[J]. Energy and Buildings, 2018,177(OCT.):77-95.
[3]	张铭健,曹国庆,冯昕.室内微生物污染水平预测关键技术研究综述[J].中国环境科学, 2018,38(11):4040-4049. Zhang M J, Cao G Q, Feng X. Review of key technologies for forecast of indoor microbial contamination levels[J]. China Environmental Science, 2018,38(11):4040-4049.
[4]	Shrimandilkar P P. Indoor air quality monitoring for human health[J]. International Journal of Modern Engineering Research, 2013,3(2):891-897.
[5]	Andualem Z, Gizaw Z, Bogale L, et al. Indoor bacterial load and its correlation to physical indoor air quality parameters in public primary schools[J]. Multidisciplinary Respiratory Medicine, 2019,14(1):1-7.
[6]	Portnoy J M, Kwak K, Dowling P, et al. Health effects of indoor fungi[J]. Annals of Allergy, Asthma&Immunology, 2005,94(3):313-320.
[7]	Roshan S K, Godini H, Nikmanesh B, et al. Study on the relationship between the concentration and type of fungal bio-aerosols at indoor and outdoor air in the Children's Medical Center, Tehran, Iran[J]. Environmental Monitoring Assessment, 2019,191(2):48.
[8]	孙帆,钱华,叶瑾,等.南京市校园室内空气微生物特征[J].中国环境科学, 2019,39(12):4982-4988. Sun F, Qian H, Ye J, et al. Characteristics of airborne microorganisms in school classrooms in Nanjing[J]. China Environmental Science, 2019,39(12):2982-4988.
[9]	王志新,宏丹,鲁雷震,等.比浊法测定硫酸多黏菌素抑制霉菌的条件优化[J].食品与发酵工业, 2020,46(7):21-27. Wang Z X, Hong D, Lu L Z, et al. Determination of the anti-fungal activity of polymyxin sulfate by turbidimetric method[J]. Food and Fermentation Industries, 2020,46(7):21-27.
[10]	Normile D. Spoiling for a fight with mold[J]. Science, 2010,327(5967):807.
[11]	武艳,荣嘉惠,Irvan Luhung.空调通风系统对室内微生物气溶胶的影响[J].科学通报, 2018,63(10):920-930. Wu Y, Rong J H, Irvan Luhung. Influence of air conditioning and mechanical ventilation (ACMV) systems on indoor microbial aerosols[J]. Chinese Science Bulletin, 2018,63:920-930.
[12]	Liu Z J, Yin H, Ma S Y, et al. Effect of environmental parameters on culturability and viability of dust accumulated fungi in different HVAC segments[J]. Sustainable Cities and Society, 2019,48:101538.
[13]	方治国,欧阳志云,刘芃,等.城市居家环境空气细菌群落结构特征[J].中国环境科学, 2014,34(10):2669-2675. Fang Z G, Ouyang Z Y, Liu P, et al. Airborne bacterial community composition in family homes in Beijing[J]. China Environment Science, 2014,34(10):2669-2675.
[14]	谷雨倩,杨自力,曹蓉,等.LiCl溶液对4中空调典型霉菌、细菌的抑制研究[J].中国环境科学, 2020,40(8):3636-3643. Gu Y Q, Yang Z L, Cao R, et al. Inhibiting effects of LiCl aqueous solution on four typical molds and bacteria in the air-conditioning system[J]. China Environmental Science, 2020,40(8):3636-3643.
[15]	Chen X, Riffat S, Bai H, et al. Recent progress in liquid desiccant dehumidification and air-conditioning:A Review[J]. Energy and Built Environment, 2019,1(1):106-130.
[16]	易晓勤.常用溶液除湿剂的性质研究[D].北京:清华大学, 2009. Yi X Q. Study on the characteristics of conventional liquid desiccants[D]. Beijing:Tsinghua University, 2009.
[17]	Robertson-Dwmers K A. Effects of liquid desiccants on airborne microorganisms:Laboratory set up, procedure development, and preliminary measurements[D]. Missouri:University of MissouriColumbia, 1991.
[18]	Park J Y, Yoon D S, Li S, et al. Empirical analysis of indoor air quality enhancement potential in a liquid-desiccant assisted air conditioning system[J]. Building and Environment, 2017,121:11-25.
[19]	Wang Y, Chung T, Jian W. Airborne fungi inactivation using an absorption dehumidification system[J]. Indoor and Built Environment, 2011,20(3):333-339.
[20]	Rosenberg M, Kjelleberg S. Hydrophobic interactions:role in bacterial adhesion[M]. Advances in Microbial Ecology, 1986,9:353-393.
[21]	林福呈.真菌疏水蛋白的研究进展[J].微生物学报, 2001,41(4):518-521. Lin F C. Recent researches on fungi hydrophobins[J]. Acta Microbiologica Sinica, 2001,41(4):518-521.
[22]	肖锟,刘聪洋,王仁女,等.表面活性剂影响微生物降解多环芳烃的研究进展[J].微生物学通报, 2021,48(2):582-595. Xiao K, Liu C Y, Wang R N, et al. Effect of surfactants on microbial degradation of polycyclic aromatic hydrocarbons:A review[J]. Microbiology China, 2021,48(2):582-595.
[23]	Wen T, Lu L. A review of correlations and enhancement approaches for heat and mass transfer in liquid desiccant dehumidification system[J]. Applied Energy, 2019,239:757-784.
[24]	United Nations. Globally harmonized system of classification and labeling of chemicals[S].
[25]	Kyung I S, Herold K E. Performance of horizontal smooth tube absorber with and without 2-Ethyl-Hexanol[J]. Journal of Heat Transfer, 2002,124(1):177-183.
[26]	Hihara E, Saito T. Effect of surfactant on falling film absorption[J]. International journal of refrigeration, 1993,16(5):339-346.
[27]	文刚,朱红,黄廷林,等.氯灭活地下水源中3种优势真菌的效能与机制[J].环境科学, 2016,37(11):4228-4234. Wen G, Zhu H, Huang T L, et al. Inactivation efficiency and mechanism of three dominant fungal spores in drinking groundwater by chlorine[J]. Environmental Science, 2016,37(11):4228-4234.
[28]	白羡钦,代光辉,陈佳,等.合欢皮提取物对黑曲霉抑菌活性的研究[J].食品工业科技, 2014,35(12):133-136. Bai X Q, Dai G H, Chen J, et al. Study on the antimicrobial activity of Aibizia julibrissin Durazz. bark extract against Aspergillus niger[J]. Science and Technology of Food Industry, 2014,35(12):133-136.
[29]	武艳.微波辐射与低温等离子体对生物气溶胶活性的影响及其机理[D].北京:北京大学, 2013. Wu Y. A study on the effects and relevant mechanisms of microwave irradiation and cold plasma on viability of bioaerosols[D]. Beijing:Peking University, 2013.
[30]	谢莉.高盐条件下橘青霉产蛋白酶作用机理及在鱼露发酵中应用[D].广州:华南农业大学, 2016. Xie L. Mechanism of protease-producing from penicillium citrinum under high-salt conditions and its application in fish sauce fermentation[D]. Guangzhou:South China Agricultural University, 2016.
[31]	Ida E L, Silva R R, de Oliveira T B, et al. Biochemical properties and evaluation of washing performance in commercial detergent compatibility of two collagenolytic serine peptidases secreted by Aspergillus fischeri and Penicillium citrinum[J]. Preparative Biochemistry, 2017,47(3):282-290.
[32]	Bang J I, Park J Y, Jo Y L, et al. Sterilization effectiveness of in-duct ultraviolet germicidal irradiation system in liquid desiccant and indirect/direct evaporative cooling-assisted 100% outdoor air system[J]. Building and Environment, 2020,186.
[33]	Guan N Z, Li J H, Shin H D, et al. Microbial response to environmental stresses:from fundamental mechanisms to practical applications[J]. Applied Microbiology and Biotechnology, 2017, 101(10):3991-4008.
[34]	D'Mello S R, Anelli R, Calissano P. Lithium induces apoptosis in immature cerebellar granule cells but promotes survival of mature neurons[J]. Experimental Cell Research, 1994,211(2):332-338.
[35]	Chaplin M. Do we underestimate the importance of water in cell biology?[J]. Nature Reviews Molecular Cell Biology, 2006,7(11):861-866.
[36]	Silver S, Wendt L. Mechanism of Action of Phenethyl Alcohol:Breakdown of the Cellular Permeability Barrier[J]. Journal of Bacteriology, 1967,93(2):560-566.