Abstract
Annual U.S. expenditures of $2B for site characterization invite the development of new technologies to improve data quality while reducing costs and minimizing uncertainty in groundwater monitoring. This work presents a new instrument for time-integrated sampling of environmental fluids using in situ solid-phase extraction (SPE). The In Situ Sampler (IS2) is an automated submersible device capable of extracting dissolved contaminants from water (100s-1000s mL) over extended periods (hours to weeks), retaining the analytes, and rejecting the processed fluid. A field demonstration of the IS2 revealed 28-day average concentration of hexavalent chromium in a shallow aquifer affected by tidal stresses via sampling of groundwater as both liquid and sorbed composite samples, each obtained in triplicate. In situ SPE exhibited 75 ± 6% recovery and an 8-fold improvement in reporting limit. Relative to use of conventional methods (100%), beneficial characteristics of the device and method included minimal hazardous material generation (2%), transportation cost (10%), and associated carbon footprint (2%). The IS2 is compatible with commercial SPE resins and standard extraction methods, and has been certified for more general use (i.e., inorganics and organics) by the Environmental Security Technology Certification Program (ESTCP) of the U.S. Department of Defense.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 45-52 |
| Number of pages | 8 |
| Journal | Science of the Total Environment |
| Volume | 556 |
| DOIs | |
| State | Published - Jun 15 2016 |
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Keywords
- Active sampling
- Environmental characterization
- Hexavalent chromium
- Solid-phase extraction
- Time-integrated
- Water sampling
ASJC Scopus subject areas
- Environmental Chemistry
- Pollution
- Waste Management and Disposal
- Environmental Engineering
Cite this
Apparatus and method for time-integrated, active sampling of contaminants in fluids demonstrated by monitoring of hexavalent chromium in groundwater. / Roll, Isaac B.; Driver, Erin M.; Halden, Rolf.
In: Science of the Total Environment, Vol. 556, 15.06.2016, p. 45-52.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Apparatus and method for time-integrated, active sampling of contaminants in fluids demonstrated by monitoring of hexavalent chromium in groundwater
AU - Roll, Isaac B.
AU - Driver, Erin M.
AU - Halden, Rolf
PY - 2016/6/15
Y1 - 2016/6/15
N2 - Annual U.S. expenditures of $2B for site characterization invite the development of new technologies to improve data quality while reducing costs and minimizing uncertainty in groundwater monitoring. This work presents a new instrument for time-integrated sampling of environmental fluids using in situ solid-phase extraction (SPE). The In Situ Sampler (IS2) is an automated submersible device capable of extracting dissolved contaminants from water (100s-1000s mL) over extended periods (hours to weeks), retaining the analytes, and rejecting the processed fluid. A field demonstration of the IS2 revealed 28-day average concentration of hexavalent chromium in a shallow aquifer affected by tidal stresses via sampling of groundwater as both liquid and sorbed composite samples, each obtained in triplicate. In situ SPE exhibited 75 ± 6% recovery and an 8-fold improvement in reporting limit. Relative to use of conventional methods (100%), beneficial characteristics of the device and method included minimal hazardous material generation (2%), transportation cost (10%), and associated carbon footprint (2%). The IS2 is compatible with commercial SPE resins and standard extraction methods, and has been certified for more general use (i.e., inorganics and organics) by the Environmental Security Technology Certification Program (ESTCP) of the U.S. Department of Defense.
AB - Annual U.S. expenditures of $2B for site characterization invite the development of new technologies to improve data quality while reducing costs and minimizing uncertainty in groundwater monitoring. This work presents a new instrument for time-integrated sampling of environmental fluids using in situ solid-phase extraction (SPE). The In Situ Sampler (IS2) is an automated submersible device capable of extracting dissolved contaminants from water (100s-1000s mL) over extended periods (hours to weeks), retaining the analytes, and rejecting the processed fluid. A field demonstration of the IS2 revealed 28-day average concentration of hexavalent chromium in a shallow aquifer affected by tidal stresses via sampling of groundwater as both liquid and sorbed composite samples, each obtained in triplicate. In situ SPE exhibited 75 ± 6% recovery and an 8-fold improvement in reporting limit. Relative to use of conventional methods (100%), beneficial characteristics of the device and method included minimal hazardous material generation (2%), transportation cost (10%), and associated carbon footprint (2%). The IS2 is compatible with commercial SPE resins and standard extraction methods, and has been certified for more general use (i.e., inorganics and organics) by the Environmental Security Technology Certification Program (ESTCP) of the U.S. Department of Defense.
KW - Active sampling
KW - Environmental characterization
KW - Hexavalent chromium
KW - Solid-phase extraction
KW - Time-integrated
KW - Water sampling
UR - http://www.scopus.com/inward/record.url?scp=84960129517&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84960129517&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2016.03.011
DO - 10.1016/j.scitotenv.2016.03.011
M3 - Article
VL - 556
SP - 45
EP - 52
JO - Science of the Total Environment
JF - Science of the Total Environment
SN - 0048-9697
ER -