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Pollutant Lead Mobility in Forest Soils of the Northeastern United States Evaluated with a 40-Year Resampling Study.

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Title: Pollutant Lead Mobility in Forest Soils of the Northeastern United States Evaluated with a 40-Year Resampling Study.
Authors: Richardson, Justin B.1,2 (AUTHOR) Justin.Richardson@virginia.edu, Porterfield, Owen C.2 (AUTHOR), Schroth, Andrew W.3 (AUTHOR), Friedland, Andrew J.4 (AUTHOR), Kaste, James M.5 (AUTHOR)
Source: Water, Air & Soil Pollution. May2026, Vol. 237 Issue 10, p1-23. 23p.
Subject Terms: *Forest soils, *Soil pollution, *Lead toxicology, *Heavy metals, *Environmental monitoring, *Soil chemistry
Geographic Terms: United States, Northeastern States
Abstract: Lead (Pb) is a toxic metal that was dispersed by humans worldwide largely through Pb gasoline combustion. Regional scale long-term datasets detecting changes and processes governing pollutant Pb pools are exceedingly rare. Here, we evaluated changes in forest floor (Oie + Oa) Pb from 1980–2021, differences in mineral soil Pb with depth (0–10, 10–20, 20 -30, and 30–50 cm), and variations in foliar and litterfall Pb at seventeen sites across the northeastern US. Forest floor Pb concentrations and pools have further decreased by 65 to 87% with forest floor Pb concentration response time (TrespC) of 35 years. The correlation between TrespC with the soil organic matter, site latitude, and site longitude highlights that colder sites have slower forest floor turnover that in turn promotes Pb retention. Forest floor Pb desorption was greatest for circumneutral organic ligands and mineral soil partition coefficient (Kd) varied among subregions and decreased with depth. Overall mineral soil Pb concentrations were 14.3 ± 2.2 mg kg−1 and mineral soil amounts (top 50 cm) were 27 ± 2.2 kg ha−1. Seven forest floor Oa horizons still exceed ecological screening levels for impacting wildlife. Foliar Pb concentrations did not vary among genera nor correlated with soil concentrations. Estimated Pb litterfall fluxes (1 to 4 g ha−1 yr−1) were < 1% of the current forest floor pool, highlighting uptake discrimination against Pb. Our study highlights the power of sustained long-term repeated decadal measurements of legacy Pb to quantify changes and variation at a regional scale. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 192479916
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Pollutant Lead Mobility in Forest Soils of the Northeastern United States Evaluated with a 40-Year Resampling Study.
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Richardson%2C+Justin+B%2E%22&quot;&gt;Richardson, Justin B.&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt; (AUTHOR)&lt;i&gt; Justin.Richardson@virginia.edu&lt;/i&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Porterfield%2C+Owen+C%2E%22&quot;&gt;Porterfield, Owen C.&lt;/searchLink&gt;&lt;relatesTo&gt;2&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Schroth%2C+Andrew+W%2E%22&quot;&gt;Schroth, Andrew W.&lt;/searchLink&gt;&lt;relatesTo&gt;3&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Friedland%2C+Andrew+J%2E%22&quot;&gt;Friedland, Andrew J.&lt;/searchLink&gt;&lt;relatesTo&gt;4&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Kaste%2C+James+M%2E%22&quot;&gt;Kaste, James M.&lt;/searchLink&gt;&lt;relatesTo&gt;5&lt;/relatesTo&gt; (AUTHOR)
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Water%2C+Air+%26+Soil+Pollution%22&quot;&gt;Water, Air &amp; Soil Pollution&lt;/searchLink&gt;. May2026, Vol. 237 Issue 10, p1-23. 23p.
– Name: Subject
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  Data: *&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Forest+soils%22&quot;&gt;Forest soils&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Soil+pollution%22&quot;&gt;Soil pollution&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Lead+toxicology%22&quot;&gt;Lead toxicology&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Heavy+metals%22&quot;&gt;Heavy metals&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Environmental+monitoring%22&quot;&gt;Environmental monitoring&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Soil+chemistry%22&quot;&gt;Soil chemistry&lt;/searchLink&gt;
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  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22United+States%22&quot;&gt;United States&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Northeastern+States%22&quot;&gt;Northeastern States&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Lead (Pb) is a toxic metal that was dispersed by humans worldwide largely through Pb gasoline combustion. Regional scale long-term datasets detecting changes and processes governing pollutant Pb pools are exceedingly rare. Here, we evaluated changes in forest floor (Oie + Oa) Pb from 1980–2021, differences in mineral soil Pb with depth (0–10, 10–20, 20 -30, and 30–50 cm), and variations in foliar and litterfall Pb at seventeen sites across the northeastern US. Forest floor Pb concentrations and pools have further decreased by 65 to 87% with forest floor Pb concentration response time (TrespC) of 35 years. The correlation between TrespC with the soil organic matter, site latitude, and site longitude highlights that colder sites have slower forest floor turnover that in turn promotes Pb retention. Forest floor Pb desorption was greatest for circumneutral organic ligands and mineral soil partition coefficient (Kd) varied among subregions and decreased with depth. Overall mineral soil Pb concentrations were 14.3 &#177; 2.2 mg kg−1 and mineral soil amounts (top 50 cm) were 27 &#177; 2.2 kg ha−1. Seven forest floor Oa horizons still exceed ecological screening levels for impacting wildlife. Foliar Pb concentrations did not vary among genera nor correlated with soil concentrations. Estimated Pb litterfall fluxes (1 to 4 g ha−1 yr−1) were &lt; 1% of the current forest floor pool, highlighting uptake discrimination against Pb. Our study highlights the power of sustained long-term repeated decadal measurements of legacy Pb to quantify changes and variation at a regional scale. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=192479916
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s11270-026-09202-z
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 23
        StartPage: 1
    Subjects:
      – SubjectFull: Forest soils
        Type: general
      – SubjectFull: Soil pollution
        Type: general
      – SubjectFull: Lead toxicology
        Type: general
      – SubjectFull: Heavy metals
        Type: general
      – SubjectFull: Environmental monitoring
        Type: general
      – SubjectFull: Soil chemistry
        Type: general
      – SubjectFull: United States
        Type: general
      – SubjectFull: Northeastern States
        Type: general
    Titles:
      – TitleFull: Pollutant Lead Mobility in Forest Soils of the Northeastern United States Evaluated with a 40-Year Resampling Study.
        Type: main
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          Name:
            NameFull: Richardson, Justin B.
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            NameFull: Porterfield, Owen C.
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            NameFull: Schroth, Andrew W.
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            NameFull: Friedland, Andrew J.
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            NameFull: Kaste, James M.
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            – D: 15
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 237
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              Value: 10
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            – TitleFull: Water, Air & Soil Pollution
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