Majumder et al. 2021 — Lead pollution in Bangladesh across air, water, soils, foods, and health pathways

This review synthesizes Bangladeshi lead contamination evidence across ambient air, river water, sediments, soils, fish, vegetables, diet items, and blood lead exposure. It is primarily an a3 source-attribution and pathway paper with a4 public-health relevance layer. The paper is useful because it links contaminated foods to a broader national pollution system rather than treating food contamination as isolated from industrial and urban emissions.

Key numbers

• The review identified 175 lead-contaminated sites in Bangladesh through soil-sample assessment.
• Reported air lead concentrations ranged from 0.09 to 376.58 ug/m3 with a mean of 21.31 ug/m3.
• River-water lead concentrations ranged from 0.0009 to 18.7 mg/L with a mean of 1.07 mg/L.
• River-sediment lead concentrations ranged from 4.9 to 69.75 mg/kg with a mean of 32.08 mg/kg.
• Fish lead concentrations ranged from 0.018 to 30.8 mg/kg with a mean of 5.01 mg/kg.
• Soil lead concentrations ranged from 7.3 to 445 mg/kg with a mean of 90.34 mg/kg.
• Vegetable lead concentrations ranged from 0.2 to 22.09 mg/kg with a mean of 4.33 mg/kg.
• Diet-item lead concentrations ranged from 0.001 to 413.9 mg/kg with a mean of 43.22 mg/kg.

Methods (brief)

The authors searched 128 peer-reviewed articles and selected 63 sources, including 58 research articles and 5 reports, using defined database and exclusion criteria. The review combines contaminated-site mapping with concentration summaries across environmental media and foods and interprets the results against WHO, FAO, USEPA, and BSTI guideline values.

Evidence Fitness

Strong for a3 source attribution and environmental burden context, and moderate for a4 public-health framing. The paper is not a clean benchmark-distribution source for any single food row because it aggregates heterogeneous datasets and matrices, but it is highly useful for showing upstream lead loading and multi-pathway exposure in Bangladesh.

Implications

Supply-chain: This review belongs under source-attribution and environmental-burden pages because it ties food contamination to industrial soils, air emissions, battery recycling, and river contamination.

Health: The paper supports public-health and exposure pages by showing that contaminated foods, especially fish and vegetables, sit within a broader national lead-exposure environment.

Wiki pages updated on ingest

• Source attribution and environmental burden apportionment
• Lead
• dietary-heavy-metal-exposure

Page history

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