Development and Testing of a Field Screening Method Based on Bubbling Extraction and Photoionization Detection for Measurement of Benzene and Total VOCs

被引：8

作者：

Devine, Catalina Espino ^{[1
]}

Bennett, Peter ^{[2
]}

Synowiec, Karen ^{[1
]}

Nelson, Sheldon ^{[1
]}

Mohler, Rachel ^{[1
]}

Einarson, Murray ^{[2
]}

机构：

[1] Chevron Energy Technol Co, Aberdeen, Scotland

[2] Haley & Aldrich Inc, Charlestown, MA USA

来源：

GROUND WATER MONITORING AND REMEDIATION | 2014年 / 34卷 / 03期

关键词：

EQUILIBRATION TIMES; DIFFUSION SAMPLERS; GROUNDWATER; DISSOLUTION; GASES; WATER;

D O I：

10.1111/gwmr.12070

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

A field screening method was developed for rapid measurement of benzene and gasoline range total petroleum hydrocarbons (TPHg) concentrations in groundwater. The method is based on collecting photoionization detector (PID) measurements from vapor samples. The vapor samples are collected by bubbling air through groundwater samples (air sparging) with a constant volume, temperature and sparging rate. The level of accuracy, sensitivity, precision, and statistical significance of the estimated concentrations, derived from the screening method, are comparable to conventional laboratory analytical results at concentrations equal to or greater than 150 mu g/L for benzene and greater than 50 mu g/L for TPHg. The method's concentration estimations can assist in making real-time decisions regarding location of dissolved plumes and light nonaqueous phase liquid (LNAPL) source zones at many fuel release sites. The screening method was tested in the laboratory and in the field with 208 and 107 samples, respectively. The study concludes that the screening method can be used as a tool to aid in completing a site conceptual model as well as analyzing groundwater from monitoring wells.

引用

页码：95 / 104

页数：10

共 24 条

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