Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater
Arsenic concentrations exceeding 10 μg/l, the United States maximum contaminant level and the World Health Organization guideline value, are frequently reported in groundwater from bedrock and unconsolidated aquifers of southeastern Michigan. Although arsenic-bearing minerals (including arsenian pyr...
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Veröffentlicht in: | Environmental geochemistry and health 2009-02, Vol.31 (1), p.147-157 |
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description | Arsenic concentrations exceeding 10 μg/l, the United States maximum contaminant level and the World Health Organization guideline value, are frequently reported in groundwater from bedrock and unconsolidated aquifers of southeastern Michigan. Although arsenic-bearing minerals (including arsenian pyrite and oxide/hydroxide phases) have been identified in Marshall Sandstone bedrock of the Mississippian aquifer system and in tills of the unconsolidated aquifer system, mechanisms responsible for arsenic mobilization and subsequent transport in groundwater are equivocal. Recent evidence has begun to suggest that groundwater recharge and characteristics of well construction may affect arsenic mobilization and transport. Therefore, we investigated the relationship between dissolved arsenic concentrations, reported groundwater recharge rates, well construction characteristics, and geology in unconsolidated and bedrock aquifers. Results of multiple linear regression analyses indicate that arsenic contamination is more prevalent in bedrock wells that are cased in proximity to the bedrock-unconsolidated interface; no other factors were associated with arsenic contamination in water drawn from bedrock or unconsolidated aquifers. Conditions appropriate for arsenic mobilization may be found along the bedrock-unconsolidated interface, including changes in reduction/oxidation potential and enhanced biogeochemical activity because of differences between geologic strata. These results are valuable for understanding arsenic mobilization and guiding well construction practices in southeastern Michigan, and may also provide insights for other regions faced with groundwater arsenic contamination. |
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Although arsenic-bearing minerals (including arsenian pyrite and oxide/hydroxide phases) have been identified in Marshall Sandstone bedrock of the Mississippian aquifer system and in tills of the unconsolidated aquifer system, mechanisms responsible for arsenic mobilization and subsequent transport in groundwater are equivocal. Recent evidence has begun to suggest that groundwater recharge and characteristics of well construction may affect arsenic mobilization and transport. Therefore, we investigated the relationship between dissolved arsenic concentrations, reported groundwater recharge rates, well construction characteristics, and geology in unconsolidated and bedrock aquifers. Results of multiple linear regression analyses indicate that arsenic contamination is more prevalent in bedrock wells that are cased in proximity to the bedrock-unconsolidated interface; no other factors were associated with arsenic contamination in water drawn from bedrock or unconsolidated aquifers. Conditions appropriate for arsenic mobilization may be found along the bedrock-unconsolidated interface, including changes in reduction/oxidation potential and enhanced biogeochemical activity because of differences between geologic strata. These results are valuable for understanding arsenic mobilization and guiding well construction practices in southeastern Michigan, and may also provide insights for other regions faced with groundwater arsenic contamination.</description><identifier>ISSN: 0269-4042</identifier><identifier>EISSN: 1573-2983</identifier><identifier>DOI: 10.1007/s10653-008-9173-x</identifier><identifier>PMID: 18496757</identifier><language>eng</language><publisher>Dordrecht: Dordrecht : Springer Netherlands</publisher><subject>Aquifer systems ; Aquifers ; Arsenic ; Arsenic - analysis ; Bedrock ; bladder ; Contaminants ; Contamination ; Correlation analysis ; Earth and Environmental Science ; Environment ; Environmental Chemistry ; Environmental Health ; Environmental Monitoring ; Fresh Water - chemistry ; Geochemistry ; Geology ; Groundwater ; Groundwater recharge ; Health and Pathology ; Michigan ; Mining ; Mobilization and transport ; neoplasms ; Original Paper ; Oxidation-Reduction ; Public Health ; Pyrite ; Recharge ; Regression Analysis ; Sandstone ; Soil Science & Conservation ; Solubility ; Studies ; Terrestrial Pollution ; Unconsolidated aquifers ; Water Movements ; Water Pollutants, Chemical - analysis ; Water pollution ; Water Supply - analysis ; Water Supply - standards ; Wells</subject><ispartof>Environmental geochemistry and health, 2009-02, Vol.31 (1), p.147-157</ispartof><rights>Springer-Verlag 2008</rights><rights>Springer Science+Business Media B.V. 2009</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a513t-447aa0f235201a5ab5bf300025d0880c4a1fd91d03663b8bc9034382e27d00843</citedby><cites>FETCH-LOGICAL-a513t-447aa0f235201a5ab5bf300025d0880c4a1fd91d03663b8bc9034382e27d00843</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10653-008-9173-x$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10653-008-9173-x$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51298</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18496757$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Meliker, Jaymie R</creatorcontrib><creatorcontrib>Slotnick, Melissa J</creatorcontrib><creatorcontrib>Avruskin, Gillian A</creatorcontrib><creatorcontrib>Haack, Sheridan K</creatorcontrib><creatorcontrib>Nriagu, Jerome O</creatorcontrib><title>Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater</title><title>Environmental geochemistry and health</title><addtitle>Environ Geochem Health</addtitle><addtitle>Environ Geochem Health</addtitle><description>Arsenic concentrations exceeding 10 μg/l, the United States maximum contaminant level and the World Health Organization guideline value, are frequently reported in groundwater from bedrock and unconsolidated aquifers of southeastern Michigan. Although arsenic-bearing minerals (including arsenian pyrite and oxide/hydroxide phases) have been identified in Marshall Sandstone bedrock of the Mississippian aquifer system and in tills of the unconsolidated aquifer system, mechanisms responsible for arsenic mobilization and subsequent transport in groundwater are equivocal. Recent evidence has begun to suggest that groundwater recharge and characteristics of well construction may affect arsenic mobilization and transport. Therefore, we investigated the relationship between dissolved arsenic concentrations, reported groundwater recharge rates, well construction characteristics, and geology in unconsolidated and bedrock aquifers. Results of multiple linear regression analyses indicate that arsenic contamination is more prevalent in bedrock wells that are cased in proximity to the bedrock-unconsolidated interface; no other factors were associated with arsenic contamination in water drawn from bedrock or unconsolidated aquifers. Conditions appropriate for arsenic mobilization may be found along the bedrock-unconsolidated interface, including changes in reduction/oxidation potential and enhanced biogeochemical activity because of differences between geologic strata. These results are valuable for understanding arsenic mobilization and guiding well construction practices in southeastern Michigan, and may also provide insights for other regions faced with groundwater arsenic contamination.</description><subject>Aquifer systems</subject><subject>Aquifers</subject><subject>Arsenic</subject><subject>Arsenic - analysis</subject><subject>Bedrock</subject><subject>bladder</subject><subject>Contaminants</subject><subject>Contamination</subject><subject>Correlation analysis</subject><subject>Earth and Environmental Science</subject><subject>Environment</subject><subject>Environmental Chemistry</subject><subject>Environmental Health</subject><subject>Environmental Monitoring</subject><subject>Fresh Water - chemistry</subject><subject>Geochemistry</subject><subject>Geology</subject><subject>Groundwater</subject><subject>Groundwater recharge</subject><subject>Health and Pathology</subject><subject>Michigan</subject><subject>Mining</subject><subject>Mobilization and transport</subject><subject>neoplasms</subject><subject>Original Paper</subject><subject>Oxidation-Reduction</subject><subject>Public Health</subject><subject>Pyrite</subject><subject>Recharge</subject><subject>Regression Analysis</subject><subject>Sandstone</subject><subject>Soil Science & Conservation</subject><subject>Solubility</subject><subject>Studies</subject><subject>Terrestrial Pollution</subject><subject>Unconsolidated aquifers</subject><subject>Water Movements</subject><subject>Water Pollutants, Chemical - 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Although arsenic-bearing minerals (including arsenian pyrite and oxide/hydroxide phases) have been identified in Marshall Sandstone bedrock of the Mississippian aquifer system and in tills of the unconsolidated aquifer system, mechanisms responsible for arsenic mobilization and subsequent transport in groundwater are equivocal. Recent evidence has begun to suggest that groundwater recharge and characteristics of well construction may affect arsenic mobilization and transport. Therefore, we investigated the relationship between dissolved arsenic concentrations, reported groundwater recharge rates, well construction characteristics, and geology in unconsolidated and bedrock aquifers. Results of multiple linear regression analyses indicate that arsenic contamination is more prevalent in bedrock wells that are cased in proximity to the bedrock-unconsolidated interface; no other factors were associated with arsenic contamination in water drawn from bedrock or unconsolidated aquifers. Conditions appropriate for arsenic mobilization may be found along the bedrock-unconsolidated interface, including changes in reduction/oxidation potential and enhanced biogeochemical activity because of differences between geologic strata. These results are valuable for understanding arsenic mobilization and guiding well construction practices in southeastern Michigan, and may also provide insights for other regions faced with groundwater arsenic contamination.</abstract><cop>Dordrecht</cop><pub>Dordrecht : Springer Netherlands</pub><pmid>18496757</pmid><doi>10.1007/s10653-008-9173-x</doi><tpages>11</tpages></addata></record> |
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subjects | Aquifer systems Aquifers Arsenic Arsenic - analysis Bedrock bladder Contaminants Contamination Correlation analysis Earth and Environmental Science Environment Environmental Chemistry Environmental Health Environmental Monitoring Fresh Water - chemistry Geochemistry Geology Groundwater Groundwater recharge Health and Pathology Michigan Mining Mobilization and transport neoplasms Original Paper Oxidation-Reduction Public Health Pyrite Recharge Regression Analysis Sandstone Soil Science & Conservation Solubility Studies Terrestrial Pollution Unconsolidated aquifers Water Movements Water Pollutants, Chemical - analysis Water pollution Water Supply - analysis Water Supply - standards Wells |
title | Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater |
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