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Abstract

          New Jersey houses a burgeoning vineyard industry due to its acidic and well-drained soils. It is currently the seventh-leading domestic wine producing state in the American Viticulture Area. Unfortunately, many vineyards are at risk of trace metal contamination due to their proximity to major roadways. Metals commonly sourced from vehicle emissions, roadway materials, and storm water runoff can easily mobilize through well-drained soils. This work focuses on lead (Pb), a common contaminant found in roadway soils and factors that influence its bioavailability to grapevines (Vitis vinifera). Typically, Pb is adsorbed onto soils and tightly held for long durations. However, phosphate fertilizers and other soil amendment additions can solubilize Pb and increase its bioavailability. Soil and grapes were sampled from linear transects established at a vineyard located in the NJ Pine Barrens neighboring a trafficked roadway. Soil samples were collected (depth: 0–20 cm) at 5 points located along transects: nearest to roadways, in between grapevines and roadways, and 3 points along rows of grapevines. Soluble Pb was extracted from soil samples using deionized water and samples were shaken. Grape samples were digested for Total Pb in nitric acid and analyzed using flame atomic absorption spectroscopy (FAAS). Simple linear regression was employed to identify a correlation between soil Pb content, roadway proximity, and grape Pb content. Future work will examine soil applications of material to sequester trace metals of concern.

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