Boisa Ndokiari, Entwistle Jane, Dean John R
Department of Geography, Ellison Building, Northumbria University, Newcastle upon Tyne NE1 8ST, UK.
Department of Applied Sciences, Ellison Building, Northumbria University, Newcastle upon Tyne NE1 8ST, UK.
Anal Chim Acta. 2014 Dec 10;852:97-104. doi: 10.1016/j.aca.2014.09.038. Epub 2014 Sep 26.
A new simple, robust and low-cost wet laboratory method for the generation of the <10 μm (PM10) particle size fraction is reported. A sedimentation method is directly compared with a centrifugation method for generation of the PM10 fraction. Both approaches are based on an integrated form of Stokes' law. Subsequently the sedimentation method was adopted. The results from the sedimentation method were corroborated using particle size distribution measurements. This approach for the generation of the PM10 fraction was applied to soil and mine waste samples from Mitrovica, Kosovo as part of an investigation in to the human risk assessment from inhalation of the PM10 fraction containing potentially harmful elements (PHEs). The average daily dose for Cd from the inhalation of suspended soil particles was calculated to be 0.021 and 0.010 μg kg(-1) BW d(-1) for a child and an adult, respectively. This corresponded to an inhalation dose of 0.50 and 0.70 μg Cdd(-1) for a child (20 kg) and an adult (70 kg), respectively.
本文报道了一种新型的、简单、可靠且低成本的湿实验室方法，用于生成粒径小于10微米（PM10）的颗粒组分。将沉降法与离心法直接比较，以生成PM10组分。两种方法均基于斯托克斯定律的综合形式。随后采用了沉降法。通过粒度分布测量证实了沉降法的结果。作为对吸入含潜在有害元素（PHEs）的PM10组分进行人体风险评估调查的一部分，这种生成PM10组分的方法应用于科索沃米特罗维察的土壤和矿山废弃物样本。计算得出，儿童和成人通过吸入悬浮土壤颗粒摄入镉的平均日剂量分别为每天每千克体重0.021和0.010微克。这分别相当于一名20千克儿童和一名70千克成人每天吸入0.50和0.70微克镉。
