Heavy Metals in Soil and Vegetables and their Effect on Health

Overview

This study measured Cd, Pb, Cu, Zn, Cr, and Ni in edible vegetable parts from domestic-wastewater-irrigated farmlands around Hisar district, Haryana. It is routeable as high-exposure vegetable occurrence context, especially for carrots and leafy vegetables.

Key numbers

The abstract reports high matrix-specific values: spinach Cd 1.30 +/- 0.31 mg/kg, cabbage Pb 4.23 +/- 0.32 mg/kg, carrot Cu 1.42 +/- 0.25 mg/kg, cauliflower Zn 3.4 +/- 0.28 mg/kg, carrot Cr 1.16 +/- 0.11 mg/kg, and spinach Ni 2.45 +/- 0.86 mg/kg.
The discussion states that spinach had the highest Cd concentration, 1.30 mg/kg, and Ni concentration, 2.45 mg/kg.
Cabbage had the highest Pb concentration, 4.23 mg/kg.
Carrot had the highest Cu concentration, 1.42 mg/kg.
Radish had the highest Cr concentration, 1.16 mg/kg, while cauliflower had the highest Zn concentration, 4.26 mg/kg.
Transfer factors reported in the abstract were Cd 0.0306 in spinach, Pb 0.4448 in cabbage, Cu 0.2642 in spinach, Zn 0.2494 in cauliflower, Cr 0.0764 in carrot, and Ni 0.7469 in spinach.
The body text later reports Cu transfer factor highest in carrot at 0.2977; use body/table values over the abstract when extracting transfer-factor rows.

Methods

Vegetable samples were collected from farmlands irrigated with domestic wastewater around Hisar district. Edible parts were washed, oven-dried, powdered, acid-digested, and analyzed by atomic absorption spectrophotometry. Five samples of each vegetable were assayed and analyzed in triplicate.

Implications

The source supports vegetable gap filling for wastewater-irrigated produce in India. It should not be silently pooled with ordinary retail-market vegetables because the exposure setting is domestic wastewater irrigation.

Update history

No substantive edit history is available in this build. The full commit record is available in git.