Long-Term Efficiencies of Dust Suppressants to Reduce PM10 Emissions from Unpaved Roads.
Long-Term Efficiencies of Dust Suppressants to Reduce PM10 Emissions from Unpaved Roads.
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抑尘剂减少未铺砌道路 PM10 排放的长期效果。
DOI：
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发表时间：
1999
影响因子：
2.7
通讯作者：
James Sweet
中科院分区：
文献类型：
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作者：
J. Gillies;J. Watson;C. F. Rogers;D. DuBois;J. Chow;R. Langston;James Sweet
进行了一项为期14个月的研究，以评估四种抑尘剂(即生物催化剂稳定剂、聚合物乳液、含聚合物的石油乳液和含原油的无害材料)在减少公共未铺设道路PM10排放方面的长期效率。为了进行比较，计算了每个测试区段和未处理区段的PM10排放率。排放速率是根据道路上风向和下风向以及路面上方1.25m至9m的PM10浓度测量得出的。对于所应用的四种类型，计算的排放因子范围在0到1,361g-PM10/车辆行驶里程(VKT)之间(平均不确定度=±35g-PM10/VKT)。应用一周后，四种类型的抑制有效率在33%到100%之间。经过8-12个月的风化和4,900-6,400次车辆通行后，抑制效率从0到95%不等。与低排放、抑制良好的路面相关的路面特性是：(1)路面泥沙负荷；(2)作为面层或覆盖层的抑制性材料的强度和弹性。产生抗脆性破坏的表面条件的抑制剂不太容易恶化，更有可能提高未铺设道路上PM10排放的长期减少效率。
A 14-month study was undertaken to assess the long-term efficiencies of four dust suppressants (i.e., biocatalyst stabilizer, polymer emulsion, petroleum emulsion with polymer, and nonhazardous crude-oil-containing materials) to reduce the emission of PM10 from public unpaved roads. PM10 emission rates were calculated for each test section and for an untreated section for comparison purposes. Emission rates were determined from PM10 concentrations measured from 1.25 m to 9 m upwind and downwind of the road and above its surface. Calculated emission factors ranged between zero and 1,361 g-PM10/vehicle kilometer traveled (VKT) (average uncertainty = ±35 g-PM10/ VKT) for the four types applied. One week after application, suppressant efficiencies ranged between 33% and 100% for the four types applied. After 8-12 months of exposure to weathering and 4,900-6,400 vehicle passes, the suppressant efficiencies ranged from zero to 95%. Roadway surface properties associated with low-emitting, well-suppressed surfaces are (1) surface silt loading and (2) strength and flexibility of suppressant material as a surface layer or cover. Suppressants that create surface conditions resistant to brittle failure are less prone to deterioration and more likely to increase long-term reduction efficiency for PM10 emissions on unpaved roads.