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DOI | 10.1007/s10453-017-9480-8 |
Field studies measuring the aerosolization of endotoxin during the land application of Class B biosolids | |
Herrmann, R. F.1; Grosser, R. J.2; Farrar, D.3; Brobst, R. B.4 | |
发表日期 | 2017-09-01 |
ISSN | 0393-5965 |
卷号 | 33期号:3页码:417-434 |
英文摘要 | Endotoxins are a component of Gram-negative bacteria cell walls and are known to be present in biosolids. Endotoxins have been shown to be potent stimulators of the innate immune response causing airway irritation and shortness of breath. Class B biosolids are routinely applied to agricultural lands to enhance soil properties and can be used as an alternative to chemical fertilizers. This study investigated the aerosolized endotoxin dispersed during the land application of Class B biosolids on agricultural land and a concrete surface at two sites in Colorado, USA. Aerosolized endotoxin was captured using HiVol samplers fitted with glass fiber filters, polycarbonate filter cassettes (both open and closed) and BioSampler impinger air samplers. Endotoxins were also measured in the biosolids to allow for correlating bulk biosolids concentrations with aerosol emission rates. Endotoxin concentrations in biosolids, impinger solutions and filter extracts were determined using the kinetic Limulus amebocyte lysate assay. Aerosolized endotoxin concentration was detected from all sites with levels ranging from 0.5 to 642 EU/m(3). The four types of sampling apparatus were compared, and the HiVol and open-faced cassette samplers produced higher time-weighted average (TWA) measurements (EU/m(3)) than the impinger and closed cassette samplers. Ambient wind speed was found to be the variable best describing the observed results with optimal wind speed for highest deposition estimated at 5 m s(-1). It is argued that HiVol air samplers are a particularly reliable approach and subsequent analyses relating TWA measurements to wind speed and biosolids characteristics were based on the measurements collected with those samplers. |
英文关键词 | Aerosolized endotoxin;Class B biosolids;Land application;Limulus amebocyte lysate |
语种 | 英语 |
WOS记录号 | WOS:000409954600011 |
来源期刊 | AEROBIOLOGIA |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/57058 |
作者单位 | 1.US EPA, ORD NRMRL, 26 W Martin Luther King Dr,Mail Locat 190, Cincinnati, OH 45268 USA; 2.Pegasus Tech Serv Inc, 46 E Hollister, Cincinnati, OH 45219 USA; 3.US EPA, ORD NCEA, 26 W Martin Luther King Dr,Mail Locat A110, Cincinnati, OH 45268 USA; 4.US EPA, Reg 8, Denver, CO 80202 USA |
推荐引用方式 GB/T 7714 | Herrmann, R. F.,Grosser, R. J.,Farrar, D.,et al. Field studies measuring the aerosolization of endotoxin during the land application of Class B biosolids[J]. 美国环保署,2017,33(3):417-434. |
APA | Herrmann, R. F.,Grosser, R. J.,Farrar, D.,&Brobst, R. B..(2017).Field studies measuring the aerosolization of endotoxin during the land application of Class B biosolids.AEROBIOLOGIA,33(3),417-434. |
MLA | Herrmann, R. F.,et al."Field studies measuring the aerosolization of endotoxin during the land application of Class B biosolids".AEROBIOLOGIA 33.3(2017):417-434. |
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