Performance of electrostatic dust collectors (EDCs) for endotoxin assessment in homes: Effect of mailing, placement, heating, and electrostatic charge.
Performance of electrostatic dust collectors (EDCs) for endotoxin assessment in homes: Effect of mailing, placement, heating, and electrostatic charge.
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DOI：
10.1080/15459624.2015.1078468
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发表时间：
2016
影响因子：
2
通讯作者：
Thorne PS
中科院分区：
文献类型：
--
作者：
Kilburg-Basnyat B;Metwali N;Thorne PS
静电除尘器（EDC）用于生物气溶胶的被动采样，但其性能的特定方面尚未得到评估。本研究调查了邮寄EDC对内毒素负荷的影响，以及EDC部署在加热通风前和远离加热通风对内毒素采样的影响。还评价了加热和未加热EDC布的内毒素采样效率。与仅含灰尘的样本相比，含灰尘的内分泌干扰物的跨国快递邮寄对高浓度内分泌干扰物（p=0.30）和低浓度内分泌干扰物（p=0.36）的内毒素浓度均无显著变化。EDC也被部署在20个相同的公寓中，每个公寓中的univent加热器前放置一个EDC，每个公寓中的内置书架上放置同期EDC。内毒素浓度存在显著差异（p=0.049），表明EDC的放置确实影响内毒素采样。加热和未加热的EDC在农场家庭中成对部署7天。内毒素浓度之间存在显著差异（p=0.027），表明加热EDC可能会降低其静电能力并影响内毒素采样。最后一项研究调查了12个加热和12个未加热的EDC布的静电荷。电荷存在显著差异（p=0.009），这表明加热EDC布可能使其采样效率降低。总之，EDC可以邮寄到部署地点和从部署地点邮寄，与通风相关的EDC放置是至关重要的，并且加热EDC减少了它们的静电荷，这可能降低它们的内毒素采样能力。
Electrostatic Dust Collectors (EDCs) are in use for passive sampling of bioaerosols, but particular aspects of their performance have not yet been evaluated. This study investigated the effect of mailing EDCs on endotoxin loading and the effect of EDC deployment in front of and away from heated ventilation on endotoxin sampling. Endotoxin sampling efficiency of heated and unheated EDC cloths was also evaluated. Cross-country express mailing of dust-spiked EDCs yielded no significant changes in endotoxin concentrations compared to dust-only samples for both high spiked-EDCs (p=0.30) and low spiked-EDCs (p=0.36). EDCs were also deployed in 20 identical apartments with one EDC placed in front of the univent heater in each apartment and contemporaneous EDC placed on the built-in bookshelf in each apartment. The endotoxin concentrations were significantly different (p=0.049) indicating that the placement of EDC does impact endotoxin sampling. Heated and unheated EDCs were deployed for 7 days in pairs in farm homes. There was a significant difference between endotoxin concentrations (p=0.027) indicating that heating EDCs may diminish their electrostatic capabilities and impact endotoxin sampling. The last study investigated the electrostatic charge of 12 heated and 12 unheated EDC cloths. There was a significant difference in charge (p=0.009) which suggests that heating EDC cloths may make them less effective for sampling. In conclusion, EDCs can be mailed to and from deployment sites, EDC placement in relationship to ventilation is crucial, and heating EDCs reduces their electrostatic charge which may diminish their endotoxin sampling capabilities.