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Heavy Metal Index

Potentially Toxic Metals (PTMs)

Source

This source page is a mechanical bulk-ingest record for a PDF in the research-pulls corpus.

Page snapshot
Cited by6 pages
Metals measured4
Evidence tierB
Year1999

Overview

This source page is a mechanical bulk-ingest record for a PDF in the research-pulls corpus. It preserves source-level identity, routeable product/analyte scope, and exact extracted numeric lines for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.

Key numbers

The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:

  • more than by other practices such as liming (28). Table 1 shows some of the main
  • reducing metal mobility due to bonding metals into more stable fractions (29, 30),
  • for amendments >1% w/w applied. Especially, the phytoavailability of PTMs
  • decreases gradually with time when the soil is amended by 5% or 10% w/w of
  • decreased the phytoavailable Pb fraction by 97%, and that the PTM uptake by
  • litter- (PLB) and switchgrass-derived biochar (SGB) ranged from 0 to 8% w/w
  • rates are summarized in Figures 3 and 4, and Table 2. The pH increase from 6.5
  • PLB) application rates from 0 to 8%, so is the SOC increase, as shown in Figure 4.
  • Table 2 highlights the significant negative correlations (inverse relationship) of pH
  • (n = 3) was removed, when detected, by using IML and UNIVARIATE (ROBUSTSCALE) procedures of the
  • SAS program. pH ranged from 6.5 to 8.0 as biochars (SGB and PLB) application rates increased from 0 to 8%
  • Soil organic carbon (OC%) changes due to biochar (SGB and PLB) application rates after 10 weeks of
  • incubation. Bars represent the standard deviation of the mean (n = 3) results are significant at P < 0.01
  • whole dataset of measurements. SGB + PLB: two biochar treated soils. One outlier from three replicates (n = 3) was
  • BCs were effective in stabilizing Pb and Cu at application rates of ≤5% without
  • higher RE% of Pb, Cu, and Zn (Figure 6). The authors also emphasized that there
  • in small arms range soil: Impact of 2012;46(3):854-862

Methods (brief)

  • Analytical method details were not mechanically resolved from extracted text.

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

Wiki pages this source may touch

Verification notes

  • Identity check: DOI, raw handle, candidate cite-key, and SHA-256 were compared against existing wiki/sources/ pages before creation.
  • Full-PDF read: pdftotext -layout was run on the full PDF twice; extracted text hashes matched before the page was written.
  • Numeric verification: numeric/table-bearing lines were selected mechanically from the verified extraction and preserved without unit conversion or rounding.
  • Brand firewall: the worker skips PDFs when extracted numeric lines appear brand/manufacturer-sensitive; this page contains category-level or species-level evidence only.
  • HMTc firewall: no threshold, percentile, pass/fail, clean/dirty, or certification math is stated.

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.

CommitDateChangeDescription
b01ec52c2026-08-04major2 sections added
d49e450f2026-08-03major5 sections added; narrative text revised