Performance of photocatalytic lamps on reduction of culturable airborne microorganism concentration
► S. epidermidis and A. niger spore reductions with photocatalytic lamps were studied. ► S. epidermidis was reduced up to 92% independent of temperature or humidity change. ► The black light photocatalytic lamps completely inactivated bacteria at 25 °C, 55% RH. ► For A. niger spores, rising humidity...
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| Veröffentlicht in: | Chemosphere (Oxford) 2011-04, Vol.83 (5), p.730-735 |
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| creator | Chuaybamroong, Paradee Thunyasirinon, Chuleewan Supothina, Sitthisuntorn Sribenjalux, Pipat Wu, Chang-Yu |
| description | ►
S. epidermidis and
A. niger spore reductions with photocatalytic lamps were studied. ► S.
epidermidis was reduced up to 92% independent of temperature or humidity change. ► The black light photocatalytic lamps completely inactivated bacteria at 25
°C, 55% RH. ► For
A. niger spores, rising humidity or temperature could lower their concentration.
Reduction of viable airborne
Staphylococcus epidermidis and
Aspergillus niger spore concentrations using two types of photocatalytic fluorescent lamps under controlled environmental conditions (25 vs. 35
°C and 55 vs. 75% relative humidity) were investigated. Visible white-light and UVA black light were in-house spray-coated with TiO
2 and then compared with a commercially coated visible white-light for microbial concentration reduction. The white-light photocatalytic lamps reduced the concentration of culturable
S. epidermidis up to 92% independent of temperature or humidity change, while the black light photocatalytic lamps completely inactivated the culturable bacteria at 25
°C, 55% relative humidity. Humidity seemed to alleviate UVA damage since better bacteria survival was found. For
A. niger spores, rising humidity or temperature could lower their concentration or drop their culturabilities so that a difference between the natural decay and photocatalytic disinfection could not be distinguished. Reductions of total bacteria and total fungi concentrations using these lamps were also examined under uncontrolled environmental conditions in an office and a waste-storage room. It was found that photocatalytic lamps could reduce total culturable bacteria concentration from 9 to 97% and total culturable fungi concentration from 3 to 95% within irradiation time of 30–480
min, respectively. Insignificant difference in concentration reduction among these photocatalytic lamps was pronounced. |
| doi_str_mv | 10.1016/j.chemosphere.2011.01.054 |
| format | Article |
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S. epidermidis and
A. niger spore reductions with photocatalytic lamps were studied. ► S.
epidermidis was reduced up to 92% independent of temperature or humidity change. ► The black light photocatalytic lamps completely inactivated bacteria at 25
°C, 55% RH. ► For
A. niger spores, rising humidity or temperature could lower their concentration.
Reduction of viable airborne
Staphylococcus epidermidis and
Aspergillus niger spore concentrations using two types of photocatalytic fluorescent lamps under controlled environmental conditions (25 vs. 35
°C and 55 vs. 75% relative humidity) were investigated. Visible white-light and UVA black light were in-house spray-coated with TiO
2 and then compared with a commercially coated visible white-light for microbial concentration reduction. The white-light photocatalytic lamps reduced the concentration of culturable
S. epidermidis up to 92% independent of temperature or humidity change, while the black light photocatalytic lamps completely inactivated the culturable bacteria at 25
°C, 55% relative humidity. Humidity seemed to alleviate UVA damage since better bacteria survival was found. For
A. niger spores, rising humidity or temperature could lower their concentration or drop their culturabilities so that a difference between the natural decay and photocatalytic disinfection could not be distinguished. Reductions of total bacteria and total fungi concentrations using these lamps were also examined under uncontrolled environmental conditions in an office and a waste-storage room. It was found that photocatalytic lamps could reduce total culturable bacteria concentration from 9 to 97% and total culturable fungi concentration from 3 to 95% within irradiation time of 30–480
min, respectively. Insignificant difference in concentration reduction among these photocatalytic lamps was pronounced.</description><identifier>ISSN: 0045-6535</identifier><identifier>EISSN: 1879-1298</identifier><identifier>DOI: 10.1016/j.chemosphere.2011.01.054</identifier><identifier>PMID: 21339001</identifier><identifier>CODEN: CMSHAF</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>A. niger ; Air Microbiology ; Applied sciences ; Aspergillus niger ; Aspergillus niger - growth & development ; Aspergillus niger - isolation & purification ; Aspergillus niger - radiation effects ; Bacteria ; Bioaerosol ; Colony Count, Microbial ; Disinfection lamp ; Exact sciences and technology ; Humidity ; Lamps ; Light ; Lighting ; Microorganisms ; Photocatalysis ; Photocatalytic oxidation (PCO) ; Photochemical Processes ; Pollution ; Reduction ; Relative humidity ; S. epidermidis ; Spores ; Staphylococcus epidermidis ; Staphylococcus epidermidis - growth & development ; Staphylococcus epidermidis - isolation & purification ; Staphylococcus epidermidis - radiation effects ; Titanium dioxide ; Ultraviolet Rays</subject><ispartof>Chemosphere (Oxford), 2011-04, Vol.83 (5), p.730-735</ispartof><rights>2011 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2011 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c471t-2fd2b2fd4795227690fc41b30b069fb8a618fa941f0f90c02fce18ba3c5b46823</citedby><cites>FETCH-LOGICAL-c471t-2fd2b2fd4795227690fc41b30b069fb8a618fa941f0f90c02fce18ba3c5b46823</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.chemosphere.2011.01.054$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24076093$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21339001$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Chuaybamroong, Paradee</creatorcontrib><creatorcontrib>Thunyasirinon, Chuleewan</creatorcontrib><creatorcontrib>Supothina, Sitthisuntorn</creatorcontrib><creatorcontrib>Sribenjalux, Pipat</creatorcontrib><creatorcontrib>Wu, Chang-Yu</creatorcontrib><title>Performance of photocatalytic lamps on reduction of culturable airborne microorganism concentration</title><title>Chemosphere (Oxford)</title><addtitle>Chemosphere</addtitle><description>►
S. epidermidis and
A. niger spore reductions with photocatalytic lamps were studied. ► S.
epidermidis was reduced up to 92% independent of temperature or humidity change. ► The black light photocatalytic lamps completely inactivated bacteria at 25
°C, 55% RH. ► For
A. niger spores, rising humidity or temperature could lower their concentration.
Reduction of viable airborne
Staphylococcus epidermidis and
Aspergillus niger spore concentrations using two types of photocatalytic fluorescent lamps under controlled environmental conditions (25 vs. 35
°C and 55 vs. 75% relative humidity) were investigated. Visible white-light and UVA black light were in-house spray-coated with TiO
2 and then compared with a commercially coated visible white-light for microbial concentration reduction. The white-light photocatalytic lamps reduced the concentration of culturable
S. epidermidis up to 92% independent of temperature or humidity change, while the black light photocatalytic lamps completely inactivated the culturable bacteria at 25
°C, 55% relative humidity. Humidity seemed to alleviate UVA damage since better bacteria survival was found. For
A. niger spores, rising humidity or temperature could lower their concentration or drop their culturabilities so that a difference between the natural decay and photocatalytic disinfection could not be distinguished. Reductions of total bacteria and total fungi concentrations using these lamps were also examined under uncontrolled environmental conditions in an office and a waste-storage room. It was found that photocatalytic lamps could reduce total culturable bacteria concentration from 9 to 97% and total culturable fungi concentration from 3 to 95% within irradiation time of 30–480
min, respectively. Insignificant difference in concentration reduction among these photocatalytic lamps was pronounced.</description><subject>A. niger</subject><subject>Air Microbiology</subject><subject>Applied sciences</subject><subject>Aspergillus niger</subject><subject>Aspergillus niger - growth & development</subject><subject>Aspergillus niger - isolation & purification</subject><subject>Aspergillus niger - radiation effects</subject><subject>Bacteria</subject><subject>Bioaerosol</subject><subject>Colony Count, Microbial</subject><subject>Disinfection lamp</subject><subject>Exact sciences and technology</subject><subject>Humidity</subject><subject>Lamps</subject><subject>Light</subject><subject>Lighting</subject><subject>Microorganisms</subject><subject>Photocatalysis</subject><subject>Photocatalytic oxidation (PCO)</subject><subject>Photochemical Processes</subject><subject>Pollution</subject><subject>Reduction</subject><subject>Relative humidity</subject><subject>S. epidermidis</subject><subject>Spores</subject><subject>Staphylococcus epidermidis</subject><subject>Staphylococcus epidermidis - growth & development</subject><subject>Staphylococcus epidermidis - isolation & purification</subject><subject>Staphylococcus epidermidis - radiation effects</subject><subject>Titanium dioxide</subject><subject>Ultraviolet Rays</subject><issn>0045-6535</issn><issn>1879-1298</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkV2L1DAUhoMo7uzqX5B6IetNx5M0TZNLGVxXWFgv9Dqk6YmToW1qkgr77zfDjB9XshDyAc97cjgPIW8pbClQ8eGwtXucQlr2GHHLgNItlNXyZ2RDZadqypR8TjYAvK1F27QX5DKlA0AJt-oluWC0aVR5bYj9itGFOJnZYhVctexDDtZkMz5kb6vRTEuqwlxFHFabfbkVyK5jXqPpR6yMj32IM1aTtzGE-MPMPk2VDaXenKM5Rl6RF86MCV-fzyvy_ebTt91tfXf_-cvu411teUdzzdzA-rLxTrWMdUKBs5z2DfQglOulEVQ6ozh14BRYYM4ilb1pbNtzIVlzRa5PdZcYfq6Ysp58sjiOZsawJi2FklxwKp5AAu1k1xzJ9_8lqeho6bYECqpOaBlEShGdXqKfTHzQFPTRmz7of7zpozcNZbW8ZN-cv1n7CYc_yd-iCvDuDJhkzehiEebTX45DJ0A1hdudOCyD_uUx6mQ9FhmDj2izHoJ_QjuPcTC9wg</recordid><startdate>20110401</startdate><enddate>20110401</enddate><creator>Chuaybamroong, Paradee</creator><creator>Thunyasirinon, Chuleewan</creator><creator>Supothina, Sitthisuntorn</creator><creator>Sribenjalux, Pipat</creator><creator>Wu, Chang-Yu</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>7X8</scope><scope>7ST</scope><scope>7T7</scope><scope>C1K</scope><scope>M7N</scope><scope>P64</scope><scope>SOI</scope></search><sort><creationdate>20110401</creationdate><title>Performance of photocatalytic lamps on reduction of culturable airborne microorganism concentration</title><author>Chuaybamroong, Paradee ; Thunyasirinon, Chuleewan ; Supothina, Sitthisuntorn ; Sribenjalux, Pipat ; Wu, Chang-Yu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c471t-2fd2b2fd4795227690fc41b30b069fb8a618fa941f0f90c02fce18ba3c5b46823</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>A. niger</topic><topic>Air Microbiology</topic><topic>Applied sciences</topic><topic>Aspergillus niger</topic><topic>Aspergillus niger - growth & development</topic><topic>Aspergillus niger - isolation & purification</topic><topic>Aspergillus niger - radiation effects</topic><topic>Bacteria</topic><topic>Bioaerosol</topic><topic>Colony Count, Microbial</topic><topic>Disinfection lamp</topic><topic>Exact sciences and technology</topic><topic>Humidity</topic><topic>Lamps</topic><topic>Light</topic><topic>Lighting</topic><topic>Microorganisms</topic><topic>Photocatalysis</topic><topic>Photocatalytic oxidation (PCO)</topic><topic>Photochemical Processes</topic><topic>Pollution</topic><topic>Reduction</topic><topic>Relative humidity</topic><topic>S. epidermidis</topic><topic>Spores</topic><topic>Staphylococcus epidermidis</topic><topic>Staphylococcus epidermidis - growth & development</topic><topic>Staphylococcus epidermidis - isolation & purification</topic><topic>Staphylococcus epidermidis - radiation effects</topic><topic>Titanium dioxide</topic><topic>Ultraviolet Rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chuaybamroong, Paradee</creatorcontrib><creatorcontrib>Thunyasirinon, Chuleewan</creatorcontrib><creatorcontrib>Supothina, Sitthisuntorn</creatorcontrib><creatorcontrib>Sribenjalux, Pipat</creatorcontrib><creatorcontrib>Wu, Chang-Yu</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>MEDLINE - Academic</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><jtitle>Chemosphere (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chuaybamroong, Paradee</au><au>Thunyasirinon, Chuleewan</au><au>Supothina, Sitthisuntorn</au><au>Sribenjalux, Pipat</au><au>Wu, Chang-Yu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Performance of photocatalytic lamps on reduction of culturable airborne microorganism concentration</atitle><jtitle>Chemosphere (Oxford)</jtitle><addtitle>Chemosphere</addtitle><date>2011-04-01</date><risdate>2011</risdate><volume>83</volume><issue>5</issue><spage>730</spage><epage>735</epage><pages>730-735</pages><issn>0045-6535</issn><eissn>1879-1298</eissn><coden>CMSHAF</coden><abstract>►
S. epidermidis and
A. niger spore reductions with photocatalytic lamps were studied. ► S.
epidermidis was reduced up to 92% independent of temperature or humidity change. ► The black light photocatalytic lamps completely inactivated bacteria at 25
°C, 55% RH. ► For
A. niger spores, rising humidity or temperature could lower their concentration.
Reduction of viable airborne
Staphylococcus epidermidis and
Aspergillus niger spore concentrations using two types of photocatalytic fluorescent lamps under controlled environmental conditions (25 vs. 35
°C and 55 vs. 75% relative humidity) were investigated. Visible white-light and UVA black light were in-house spray-coated with TiO
2 and then compared with a commercially coated visible white-light for microbial concentration reduction. The white-light photocatalytic lamps reduced the concentration of culturable
S. epidermidis up to 92% independent of temperature or humidity change, while the black light photocatalytic lamps completely inactivated the culturable bacteria at 25
°C, 55% relative humidity. Humidity seemed to alleviate UVA damage since better bacteria survival was found. For
A. niger spores, rising humidity or temperature could lower their concentration or drop their culturabilities so that a difference between the natural decay and photocatalytic disinfection could not be distinguished. Reductions of total bacteria and total fungi concentrations using these lamps were also examined under uncontrolled environmental conditions in an office and a waste-storage room. It was found that photocatalytic lamps could reduce total culturable bacteria concentration from 9 to 97% and total culturable fungi concentration from 3 to 95% within irradiation time of 30–480
min, respectively. Insignificant difference in concentration reduction among these photocatalytic lamps was pronounced.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><pmid>21339001</pmid><doi>10.1016/j.chemosphere.2011.01.054</doi><tpages>6</tpages></addata></record> |
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| source | MEDLINE; Access via ScienceDirect (Elsevier) |
| subjects | A. niger Air Microbiology Applied sciences Aspergillus niger Aspergillus niger - growth & development Aspergillus niger - isolation & purification Aspergillus niger - radiation effects Bacteria Bioaerosol Colony Count, Microbial Disinfection lamp Exact sciences and technology Humidity Lamps Light Lighting Microorganisms Photocatalysis Photocatalytic oxidation (PCO) Photochemical Processes Pollution Reduction Relative humidity S. epidermidis Spores Staphylococcus epidermidis Staphylococcus epidermidis - growth & development Staphylococcus epidermidis - isolation & purification Staphylococcus epidermidis - radiation effects Titanium dioxide Ultraviolet Rays |
| title | Performance of photocatalytic lamps on reduction of culturable airborne microorganism concentration |
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