Lead Bioaccessibility and Commonly Measured Soil Characteristics (Detroit, MI, USA) PHASE II
Year: 2025
Type: dataset
Abstract: Urban soil contaminated with anthropogenic sources of Pb is a major contributor to child Pb exposure. To assess the Pb risk in urban areas, composite samples were collected from 142 voluntary privately owned 142 residential parcels in Detroit, Hamtramck, and Highland Park, Michigan. Samples were collected at two time periods, before and after treatment applied for those denoted as treatment sites. Samples were collected from areas covered with turf grass on the parcels from the front, middle and rear sections. Soils were collected with a bulb planter at approximately 10cm depth and were cleaned with a tap water-Liquinox detergent solution and then rinsed with ultrapure water (>18.2 MΩ/cm) between sampling sites. Soils were mixed by hand in the field in one-gallon freezer bags before being transported to the laboratory at Wayne State University. Bagged soil samples were then air dried in a fume hood for at least two weeks and sifted. After sampling, for soils that were randomly determined to receive treatment, either received a liquid or a granular bonemeal treatment and were collected about one year after application in the same manner as the pretreated samples. Total soil Pb was assessed according to EPA Method 3051a.1 In short, 0.5g of sieved (2, using the same µm size fraction. Since the standard PBET procedure utilizes a pH of 1.5, which underestimates changes in bioavailability following phosphate amendments3, a pH of two was used in this study, consistent with Hettiarachchi et al.4 The percentage (%) of IVBA lead was determined based on the ratio of IVBA to total Pb ((IVBA Pb)/(Total Pb)∙100). Total As was assessed using determined using the same methods as Total soil Pb (EPA Method 3051a). A Synthetic Precipitation Leaching Procedure was utilized to assess the mobility of As and P from samples to determine if eutrophication of these two elements occurred because of the amendments. This method combined the use of EPA Method 13125 and the filtration method outlined by Qi and Donahoe.6 Soil pH, CEC (cmol+/kg), organic matter content (%), and elemental concentrations (mg/kg), were measured by Dairyland Laboratories (Arcadia, WI). The soil pH was measured in a 1:1 soil: water slurry.7 The percent OM content was determined by loss on ignition.8 Soil (5g) was transferred to a pre-weighed crucible and dried 2 or more hours at 105 °C in one of two ovens (ThermoScientific HeraTherm Oven OGS180 or Fisher Scientific Isotemp Oven Model 655G). Once
Language: English
Topic: Heavy metals in environment
Subfield: Pollution
Field: Environmental Science
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W4417503315