Contribution of Soil Lead to Blood Lead in Children: A Study from New Orleans, LA  

作　　者：Michael T. Abel Burton Suedel Steven M. Presley Les N. McDaniel Richard Rigdon Timothy Goebel Robert J. Lascano Richard Zartman Todd A. Anderson George P. Cobb 

机构地区：[1]Department of Environmental Toxicology, The Institute of Environmental and Human Health, Texas Tech University, Lubbock, USA [2]Department of Plant and Soil Science, Texas Tech University, Lubbock, USA [3]TraceAnalysis, Incorporated, Lubbock, USA [4]US Army Engineer Research and Development Center, Vicksburg, USA [5]USDA Wind, Erosion, and Water Conservation Research Unit, Lubbock, USA

出　　处：《Journal of Environmental Protection》2012年第12期1704-1710,共7页环境保护（英文）

摘　　要：In recent years, a significant number of environmental studies have been conducted in New Orleans, LA and surrounding Gulf Coast areas due in part to the occurrence of hurricanes Katrina and Rita. Data collected from studies in the New Orleans area indicate that inorganic contaminants including arsenic (As), iron (Fe), lead (Pb), and vanadium (V);high concentration of bioaerosols, particularly Cladosporium and Aspergillus, and several organic pollutants (PAHs, pesticides, and volatiles) may pose a risk to human health in New Orleans. While many of these results resemble historical data, a current quantitative exposure assessment has not been conducted. We engaged in one such assessment for lead (Pb) contamination in surface soils. We used Pb concentrations in surface soils ( μg/day to 102 μg/day for our study area within urbanNew Orleans. These data are concerning because children exposed to >33.5 μg/d Pb may cause their blood-Pb levels to exceed the Centers for Disease Control and Prevention (CDC) threshold for blood-Pb of 10 μg/dL. It has generally been accepted that a more protective blood Pb concentration threshold of 6 - μg/dL is warranted. Using the 6-μg/dL threshold puts children exposed to as little as 20.2 μg/day Pb at risk.In recent years, a significant number of environmental studies have been conducted in New Orleans, LA and surrounding Gulf Coast areas due in part to the occurrence of hurricanes Katrina and Rita. Data collected from studies in the New Orleans area indicate that inorganic contaminants including arsenic (As), iron (Fe), lead (Pb), and vanadium (V);high concentration of bioaerosols, particularly Cladosporium and Aspergillus, and several organic pollutants (PAHs, pesticides, and volatiles) may pose a risk to human health in New Orleans. While many of these results resemble historical data, a current quantitative exposure assessment has not been conducted. We engaged in one such assessment for lead (Pb) contamination in surface soils. We used Pb concentrations in surface soils ( μg/day to 102 μg/day for our study area within urbanNew Orleans. These data are concerning because children exposed to >33.5 μg/d Pb may cause their blood-Pb levels to exceed the Centers for Disease Control and Prevention (CDC) threshold for blood-Pb of 10 μg/dL. It has generally been accepted that a more protective blood Pb concentration threshold of 6 - μg/dL is warranted. Using the 6-μg/dL threshold puts children exposed to as little as 20.2 μg/day Pb at risk.

关 键 词：METALS LEAD New ORLEANS EXPOSURE Model 

分 类 号：R73[医药卫生—肿瘤]