Jiang et al. 2020 — Metals in Henan village grain and vegetables near a battery factory

Jiang and colleagues measured mercury, arsenic, nickel, lead, cadmium, chromium, copper, and zinc across soil, groundwater, air particulates, locally produced grain, and vegetables in a village near a battery factory in Henan Province, China. For Heavy Metal Index product occurrence, the relevant values are the wheat, corn, and vegetable concentrations reported in Table 4. Mercury and arsenic are total-element results; chromium is reported as total Cr, not Cr(VI).

Key numbers

Table 4 reports heavy metal concentrations in crop samples in mg/kg:

GB2762-2017 values printed below the crop rows were Hg 0.02, As 0.5, Pb 0.2, Cd 0.1, and Cr 1 mg/kg; Ni, Cu, and Zn were printed as -.

Table 4 reports vegetable concentrations in mg/kg:

The GB2762-2017 vegetable rows print leaf-vegetable values of Hg 0.001, As 0.5, Pb 0.3, Cd 0.2, and Cr 0.5 mg/kg, and tuber-vegetable values of Hg 0.001, As 0.5, Pb 0.1, Cd 0.1, and Cr 0.5 mg/kg; Ni, Cu, and Zn are printed as -.

Additional source-reported numbers:

• The abstract states that Cd and Pb in wheat, Hg in corn, and Cd, Hg, and Pb in vegetables were higher than corresponding Chinese limits.
• The text reports average vegetable concentrations used for risk calculations as Hg 0.002, As 0.0175, Cd 4.26, Ni 2.29, Cr 0.22, Cu 7.08, Zn 48.79, and Pb 1.01 mg/kg.
• Adult dietary intake assumptions were 246.38 g wheat, 13.51 g corn, and 198.88 g vegetables per day.
• Child dietary intake assumptions were 82.13 g wheat, 4.50 g corn, and 66.29 g vegetables per day.
• Table 9 reports enrichment coefficients (%) for wheat, corn, and vegetables: Cd 11.0/2.7/146.0; Pb 1.3/0.7/4.9; Ni 1.4/1.5/5.43; As 1.4/1.0/4.9; Cr 1.2/0.5/0.3.

Methods (brief)

Samples were collected on December 20, 2018, in SZD village near a battery factory in Xinxiang, Henan Province. Wheat and corn were collected from villagers’ homes, crushed, passed through a 100 mesh nylon screen, and reserved for analysis. Fresh Brassica pekinensis, Brassica chinensis, Raphanus sativus, and Spinacia samples were collected in triplicate, washed with tap water and deionized water, dried at 65 °C, pulverized, and sieved. For Ni, Pb, Cd, Cr, Cu, and Zn, grain and vegetable samples were digested with HNO3-HClO4 and measured by ICP-MS; Hg and As were determined after HNO3-H2O2 digestion by atomic fluorescence spectrometry. Detection and quantitation limits were 0.0015 and 0.005 ug/L for Hg, 0.015 and 0.05 ug/L for As, 0.009 and 0.03 ug/L for Ni, 0.009 and 0.03 ug/L for Pb, 0.0005 and 0.0017 ug/L for Cd, 0.008 and 0.027 ug/L for Cr, 0.009 and 0.03 ug/L for Cu, and 0.15 and 0.5 ug/L for Zn.

Implications

This source contributes China-market industrial-vicinity occurrence evidence for wheat, corn, leafy vegetables, non-root vegetables, and radish/root vegetables. Soil, groundwater, and particulate values are exposure-context evidence and are not product concentration values. The crop and vegetable concentrations are reported in mg/kg; downstream extraction should keep wheat, corn, leafy vegetables, and root vegetables separate, and should not treat total Hg as methylmercury, total As as inorganic arsenic, or total Cr as Cr(VI).

Wiki pages this source may touch

• wheat
• maize
• vegetables
• leafy-vegetables
• root-vegetables
• other-grain-products
• leafy-vegetables-other
• non-root-vegetables
• root-tuber-vegetables
• mercury-total
• arsenic-total
• nickel
• lead
• cadmium
• chromium
• copper
• zinc

Verification notes

• PDF text extracted with pdftotext -layout; the extracted text contained the RSC accepted-manuscript title page, DOI, methods, Table 4 concentration rows, risk-calculation intake assumptions, Table 9 enrichment coefficients, and references.
• DOI verified from the first page as 10.1039/D0EM00104J; DOI, raw-handle, and cite-key checks found no existing source page before creation.
• Table 4 crop and vegetable values above were checked against the extracted table. Units are copied as mg/kg and limits/detection limits as printed; no conversion was made.
• The methods section says 8 wheat samples were collected, but Table 4 labels wheat as n=7; sample_n is left null and the discrepancy is recorded in sample_population.
• Speciation: Hg, As, and Cr are total-element results. The source does not report methylmercury, inorganic arsenic, inorganic mercury, or Cr(VI) concentrations.
• Frontmatter product and ingredient slugs were checked against docs/gpt-collaboration/taxonomy-snapshot.md; no new slug was invented.

Page history

The five most recent substantive edits to this page. 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.