Nickel accumulation in paddy rice on serpentine soils containing high geogenic nickel contents in Taiwan
Journal
Environmental Geochemistry and Health
Journal Volume
39
Journal Volume
39
Journal Issue
6
Journal Issue
6
Pages
1325-1334
Start Page
1325
End Page
1334
ISSN
02694042
Date Issued
2017-12-01
Author(s)
Lai, Yun-Jie
Abstract
We investigated the extractability of nickel (Ni) in serpentine soils collected from rice paddy fields in eastern Taiwan to evaluate the bioavailability of Ni in the soils as well as for demonstrating the health risks of Ni in rice. Total Ni concentrations in the soils ranged were 70.2–2730 mg/kg (mean, 472 mg/kg), greatly exceeding the natural background content and soil control standard in Taiwan. Available Ni concentration only accounts for <10% of total soil Ni content; 0.1 N HCl-extractable Ni was the more suitable index for Ni bioavailability in the soil to rice than was diethylenetriaminepentaacetic acid (DTPA)-extractable Ni. The accumulation ability of rice roots was much higher than that of its shoots; however, compared with those reported previously, our brown and polished rice samples contained much higher Ni concentrations, within the ranges of 1.50–4.53 and 2.45–5.54 mg/kg, respectively. On the basis of the provisional tolerable Ni intake for adults recommended by the World Health Organization (WHO), daily consumption of this rice can result in an excessive Ni intake.
Subjects
Bioavailability
Heavy metal
Human health
Serpentine
Ultramafics
SDGs
Other Subjects
acetic acid; bioaccumulation; bioavailability; health risk; nickel; paddy field; rice; serpentine; soil pollution; ultramafic rock; Taiwan; chelating agent; nickel; pentetic acid; adult; bioavailability; chemistry; crop; dietary exposure; human; isolation and purification; metabolism; Oryza; plant structures; risk assessment; soil pollutant; Taiwan; water pollutant; Adult; Biological Availability; Chelating Agents; Crops, Agricultural; Dietary Exposure; Humans; Nickel; Oryza; Pentetic Acid; Plant Structures; Risk Assessment; Soil Pollutants; Taiwan; Water Pollutants, Chemical
Publisher
Springer Netherlands
Type
journal article