排序方式: 共有34条查询结果,搜索用时 140 毫秒
31.
Gettel M Gulliver JS Kayhanian M DeGroot G Brand J Mohseni O Erickson AJ 《Journal of environmental monitoring : JEM》2011,13(10):2703-2709
Suspended solids either as total suspended solids (TSS) or suspended sediment concentration (SSC) is an integral particulate water quality parameter that is important in assessing particle-bound contaminants. At present, nearly all stormwater runoff quality monitoring is performed with automatic samplers in which the sampling intake is typically installed at the bottom of a storm sewer or channel. This method of sampling often results in a less accurate measurement of suspended sediment and associated pollutants due to the vertical variation in particle concentration caused by particle settling. In this study, the inaccuracies associated with sampling by conventional intakes for automatic samplers have been verified by testing with known suspended sediment concentrations and known particle sizes ranging from approximately 20 μm to 355 μm under various flow rates. Experimental results show that, for samples collected at a typical automatic sampler intake position, the ratio of sampled to feed suspended sediment concentration is up to 6600% without an intake strainer and up to 300% with a strainer. When the sampling intake is modified with multiple sampling tubes and fitted with a wing to provide lift (winged arm sampler intake), the accuracy of sampling improves substantially. With this modification, the differences between sampled and feed suspended sediment concentration were more consistent and the sampled to feed concentration ratio was accurate to within 10% for particle sizes up to 250 μm. 相似文献
32.
Ershadi Mohammad Javad Qhanadi Taghizadeh Omid Hadji Molana Seyyed Mohammad 《Environmental science and pollution research international》2021,28(23):29394-29411
Environmental Science and Pollution Research - Nowadays budget and schedule constraints have forced organizations to select six sigma projects based on pre-defined success criteria. Also,... 相似文献
33.
Zare Ehsan Nazarzadeh Fallah Zari Le Van Thuan Doan Van-Dat Mudhoo Ackmez Joo Sang-Woo Vasseghian Yasser Tajbakhsh Mahmood Moradi Omid Sillanpää Mika Varma Rajender S. 《Environmental Chemistry Letters》2022,20(4):2629-2664
Environmental Chemistry Letters - The release of pharmaceuticals into the environment induces adverse effects on the metabolism of humans and other living species, calling for advanced remediation... 相似文献
34.
Fazeli Mahyar Fazeli Faegheh Nuge Tamrin Abdoli Omid Moghaddam Shokooh 《Journal of Polymers and the Environment》2022,30(2):644-652
Journal of Polymers and the Environment - The principal intention of this work is to fabricate and characterize the polyamide/chitosan nanocomposite by a novel single solvent method through the... 相似文献