Influence of air humidity on the suppression of fugitive dust by using a water-spraying system

Grundnig, Peter Werner; Höflinger, Wilhelm; Mauschitz, Gerd; Liu, Zechang; Zhang, Guiqin; Wang, Zhiqiang

doi:10.1016/s1672-2515(07)60265-6

Cited by 27 publications

(7 citation statements)

References 4 publications

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“…Cattle can be more active in the early morning or late evening due to cooler temperatures compared to midday [ 4 ], and this may function to aerosolize dried manure and soil in the pens. Low relative humidity can be conducive to the formation of fugitive dust [ 25 ] containing indicator E. coli from the surface of dry agricultural fields and feedlot pens [ 26 , 27 ] that is then aerosolized during dust-generating activity such as vehicular traffic on dirt roads, cattle activity in the feedlot, or plowing fallow agricultural fields [ 28 ]. Other studies have found that increases in relative humidity and solar radiation were associated with reductions in the concentration of airborne bacteria [ 29 , 30 ].…”

Section: Discussionmentioning

confidence: 99%

Low to Zero Concentrations of Airborne Bacterial Pathogens and Indicator E. coli in Proximity to Beef Cattle Feedlots in Imperial Valley, California

et al. 2023

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This study characterized the effect of distance from beef cattle feedlots, environmental factors, and climate on the occurrence of airborne bacterial indicators and pathogens. Three hundred air samples were collected over 6 months from five feedlots, with each air sample comprising 6000 L of air. Air samples were processed onto TSB-enriched air filters, qPCR-screened, and then qPCR-confirmed for suspect positive colonies of E. coli O157, non-O157-Shiga-toxin-producing E. coli (STEC), Salmonella, and E. coli. Direct enumeration of E. coli was also collected. Although no bacterial pathogens were qPCR-confirmed for the 300 samples, E. coli was detected in 16.7% (50/300) of samples, with an overall mean concentration of 0.17 CFU/6000 L air. Logistic regression analyses revealed a higher odds of E. coli for samples in close proximity compared to >610 m (2000 ft) distance from feedlots, along with significant associations with meteorological factors, sampling hour of day, and the presence of a dust-generating activity such as plowing a field or nearby vehicular traffic. The lack of bacterial pathogen detection suggests airborne deposition from nearby feedlots may not be a significant mechanism of leafy green bacterial pathogen contamination; the result of our study provides data to inform future revisions of produce-safety guidance.

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Section: Discussionmentioning

confidence: 99%

Low to Zero Concentrations of Airborne Bacterial Pathogens and Indicator E. coli in Proximity to Beef Cattle Feedlots in Imperial Valley, California

et al. 2023

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“…Understandable issues are relied on the three main factors, that is, air temperature, actual vapor pressure, and wind both speed and direction in which are supposed to be effectively point sources for air pollution, gases and dust emission. (Botkin & Keller 2005;Carotenuto et al 2010;Gaunt et al 2003aGaunt et al , 2003bGrunding et al 2006;Hensley et al 2008;Gehlin et al 2003). Note.…”

Section: Vehicle Tallying and Surveyingmentioning

confidence: 99%

“…In paralleling of aforementioned statements, Sellers (1969); Linsley et al (1988); Grim (1962); Grunding et al (2006); Hidy and Brock (1971); Baver et al (1972); Gaunt et al (2003aGaunt et al ( , 2003b; Carotenuto et al (2010); Botkin & Keller (2005); Balachandran et al (2003) have done their research works and found that wind is identified as the supporting factors for fly dust moving, particularly turbulent wind and also dry season. Also, there are suspended dust particles in the atmosphere which is high concentration in the tropopause atmospheric layer, less in the stratosphere, and very less in the mesosphere.…”

mentioning

confidence: 93%

Using Multiple-Phase Nozzles to Produce Water Droplets for Removing Smaller Dust Particles of Below MRT-BTS Saphan Khwai Station in Bangkok Thailand

Duangmal¹,

Bualert²,

Chunkao³

2014

MAS

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The research is intentionally aimed to employ the multiple-phase nozzles to produce the 10-micrometer water droplets in gas form to remove less 100-micrometer smaller dust particles by agglomeration process inside street tunnel on heavy traffic point sources at sky train MRT-BTS Saphan Khwai station in Bangkok. The four sets of 100-m hoses with 52 multiple-phase nozzles (208 nozzles) were established on 100-m beams (four beams), which are 21-m wide (5-m apart) and 5.575-m high, and connecting with high pressure pump (1,000 lbs/min) to press clean water 0.076 liters/min through the 10-micrometer orifice nozzles. The spraying time was about every 10 minutes during collecting TSP and PM10 dust by Hi-Volume Air Sampler on five periods of 05:00-08:00, 08:00-11:00, 11:00-14:00, 14:00-17:00, and 17:00-20:00 for 5-consecutive days, 30 November to 4 December 2008. Also, the air temperature, actual vapor pressure, and speed-direction wind measured at 1.5 and 5.0 meters in height underneath of the ceiling and above the roof of MRT-BTS Saphan Khwai station. Results found that the multiple-phase nozzles showed effectiveness to remove the smaller 100-micrometer dust particles underneath of MRT-BTS Saphan Khwai station by spraying 10-micrometer water droplets through 10-micrometer orifice nozzles. The decreasing concentration of TSP northerly 30.25 %, southerly 26.21 %; and also for PM10 northerly 39.96 %, southerly 40.39 %. Moreover, the concentration between street tunnel and northerly were decreased in both TSP (30.38%) and PM10 (40.17 %), and southerly were decreased in both TSP (30.05%) and PM10 (40.88 %). In case, on the central line effects between street tunnel and northerly found the decreases of TSP (30.64%) and PM10 (37.65%), southerly decreases of TSP (33.71%) and PM10 (43.78%). An increase of the 10-micrometer water droplets spraying frequency through multiple-phase nozzles (208 nozzles) is expected to gain more decreasing concentration down to under standard values. In addition, an applying the concentration of smaller 100-micrometer dust particles is useful for setting the automatic pumping operation that would be acceptable to the public.

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“…Several studies have been conducted using different methods and software to locate dust origins and estimate PM concentrations variations due to dust storms in various regions. Effects of various parameters such as wind direction and speed, surface roughness, soil moisture, vegetation cover, and mixing height on the formation and transportation of dust particles have been also investigated [ Marticorena et al, ; Fécan et al, ; Draxler et al, ; Bréon et al, ; Grundnig et al, ; Li et al, ; Harris and Davidson, ; Stout, ; Liu et al, ; El‐ossta et al, ; Csavina et al, ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Middle Eastern dust sources on PM₁₀ in Iran: Highlighting the impact of Tigris‐Euphrates basin sources and Lake Urmia desiccation

2016

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Contribution of different Middle Eastern dust origins to PM10 (PM with aerodynamic diameters less than 10 µm) levels in several receptor large cities in Iran was investigated. Initially, the major regional dust episodes were determined through statistical analysis of recorded PM levels at air quality stations and verified using satellite images. The particles dispersion was simulated by Hybrid Single‐Particle Lagrangian Integrated Trajectory (HYSPLIT) to regenerate PM10 during the dust episodes. The accuracy of the modeled results was rather convincing, with an average squared correlation coefficient (R2) of 0.7 (max = 0.95). Consequently, the contributions of different dust sources to the observed concentrations were determined. Basin of Tigris‐Euphrates Rivers encompasses active dust sources with significant rate of emission due to fluvial deposits. The sources in this basin with approximately 70–95% contribution, by far, had the most influence on PM10 levels at the receptor cities. In a finer resolution, northern and central parts of Iraq had the most influence on PM10 level during the dust episodes. Effect of probable improvement or deterioration of the current dust origin conditions on PM10 levels was analyzed by performing a sensitivity analysis through varying threshold friction velocities. The results demonstrated that 10% increase or decrease in threshold friction velocities of major dust sources could lead to average of 51% decrease or 77% increase in the receptor cities' PM10, respectively. Finally, effects of Lake Urmia desiccation, as a new hydrological prospect dust origin were analyzed. The predicted dust from the prospective dried lake bed could result in ~ 30–60% increase in PM10 of nearby cities during the studied dust episodes.

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Influence of air humidity on the suppression of fugitive dust by using a water-spraying system

Cited by 27 publications

References 4 publications

Low to Zero Concentrations of Airborne Bacterial Pathogens and Indicator E. coli in Proximity to Beef Cattle Feedlots in Imperial Valley, California

Low to Zero Concentrations of Airborne Bacterial Pathogens and Indicator E. coli in Proximity to Beef Cattle Feedlots in Imperial Valley, California

Using Multiple-Phase Nozzles to Produce Water Droplets for Removing Smaller Dust Particles of Below MRT-BTS Saphan Khwai Station in Bangkok Thailand

Impact of Middle Eastern dust sources on PM₁₀ in Iran: Highlighting the impact of Tigris‐Euphrates basin sources and Lake Urmia desiccation

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Influence of air humidity on the suppression of fugitive dust by using a water-spraying system

Cited by 27 publications

References 4 publications

Low to Zero Concentrations of Airborne Bacterial Pathogens and Indicator E. coli in Proximity to Beef Cattle Feedlots in Imperial Valley, California

Low to Zero Concentrations of Airborne Bacterial Pathogens and Indicator E. coli in Proximity to Beef Cattle Feedlots in Imperial Valley, California

Using Multiple-Phase Nozzles to Produce Water Droplets for Removing Smaller Dust Particles of Below MRT-BTS Saphan Khwai Station in Bangkok Thailand

Impact of Middle Eastern dust sources on PM10 in Iran: Highlighting the impact of Tigris‐Euphrates basin sources and Lake Urmia desiccation

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Impact of Middle Eastern dust sources on PM₁₀ in Iran: Highlighting the impact of Tigris‐Euphrates basin sources and Lake Urmia desiccation