O'Connor David J, Daly Shane M, Sodeau John R
Department of Chemistry and Environmental Research Institute, University College Cork, Cork, Ireland.
Department of Chemistry and Environmental Research Institute, University College Cork, Cork, Ireland.
Waste Manag. 2015 Aug;42:23-30. doi: 10.1016/j.wasman.2015.04.015. Epub 2015 May 16.
This study is the first to employ the on-line WIBS-4 (Wideband Integrated Bioaerosol Sensor) technique for the monitoring of bioaerosol emissions and non-fluorescing "dust" released from a composting/green waste site. The purpose of the research was to provide a "proof of principle" for using WIBS to monitor such a location continually over days and nights in order to construct comparative "bioaerosol site profiles". The real-time data obtained was then used to assess variations of the bioaerosol counts as a function of size, "shape", site location, working activity levels, time of day, relative humidity, wind speeds and wind directions. Three short campaigns were undertaken, one classified as a "light" workload period, another as a "heavy" workload period and finally a weekend when the site was closed. One main bioaerosol size regime was found to predominate: 0.5-3μm with morphologies ranging from elongated to ellipsoidal/spherical. The real-time number-concentration data provides a long-term "video" record of the site and were consistent with the Andersen sampling protocol performed that provides only a single "snapshot" for bioaerosol release. The number-concentration of fluorescent particles as a proportion of total particle counts amounted, on average, to ∼1% for the "light" workday period, ∼7% for the "heavy" workday period and ∼18% for the weekend. The bioaerosol release profiles at the weekend were considerably different from those monitored during the working weekdays.
本研究首次采用在线WIBS - 4（宽带综合生物气溶胶传感器）技术来监测堆肥/绿色垃圾处理场排放的生物气溶胶和非荧光“灰尘”。该研究的目的是提供一个“原理证明”，即使用WIBS在白天和黑夜连续监测这样一个地点，以便构建比较性的“生物气溶胶场地概况”。然后，将获得的实时数据用于评估生物气溶胶计数随尺寸、“形状”、场地位置、工作活动水平、一天中的时间、相对湿度、风速和风向的变化。进行了三次短期监测活动，一次归类为“轻”工作量时段，另一次为“重”工作量时段，最后一次是在场地关闭的周末。发现一个主要的生物气溶胶尺寸范围占主导：0.5 - 3μm，形态从细长到椭圆形/球形不等。实时数量浓度数据提供了该场地的长期“视频”记录，并且与仅提供生物气溶胶释放单一“快照”的安德森采样协议一致。在“轻”工作日时段，荧光颗粒数量浓度占总颗粒计数的比例平均约为1%，“重”工作日时段约为7%，周末约为18%。周末的生物气溶胶释放概况与工作日监测的情况有很大不同。
