Food safety and bioavailability evaluations of four vegetables grown in the highly arsenic-contaminated soils on the Guandu Plain of Northern Taiwan
Journal
International Journal of Environmental Research and Public Health
Journal Volume
11
Journal Volume
11
Journal Issue
4
Journal Issue
4
Pages
4091-4107
Start Page
4091
End Page
4107
ISSN
16617827
Date Issued
2014-04-14
Author(s)
Abstract
Arsenic contamination in a large area of agricultural fields on the Guandu Plain of northern Taiwan was confirmed in a survey conducted in 2006, but research concerning the relationship between bioavailable As concentrations in contaminated soils and crop production in Taiwan is not available. Pot experiments were conducted to examine the growth and accumulation of As in four vegetable crops grown in As-contaminated soils and to assess As intake through consumption. The phytotoxic effects of As in soils were not shown in the pot experiments in which vegetable crops were grown in soils contaminated with different As levels in situ collected from Guandu Plain (120-460 mg/kg) or artificially spiked As-contaminated soils (50-170 mg/kg). Experimental results showed that the bioavailable As extracted with 0.5M NaHCO3 from soils can be used to estimate As concentrations in vegetables. The As concentrations in the vegetables were compared with data shown in the literature and As limits calculated from drinking water standards and the provisional tolerance weekly intake (PTWI) of inorganic As established by the Food and Agriculture Organization of the United Nations/World Health Organization (FAO/WHO). Although the As levels in the vegetables were not high and the bioavailability of As in the soils was quite low, long-term consumption may result in higher As intake in the human body.
Subjects
Arsenic (As)
Extraction method
Phytotoxicity
Provisional tolerance weekly intake (PTWI)
Soil testing
Vegetables
SDGs
Other Subjects
arsenic; arsenic; bioaccumulation; bioavailability; contaminated land; crop production; extraction method; Food and Agricultural Organization; food safety; phytotoxicity; soil pollution; soil test; vegetable; World Health Organization; article; bioaccumulation; bioavailability; carrot; Chrysanthemum; food intake; food safety; lettuce; nonhuman; phytotoxicity; plant growth; pollution monitoring; soil analysis; soil pollution; Taiwan; vegetable; Guandu Plain; Taiwan; Arsenic; Biological Availability; Environmental Monitoring; Food Contamination; Food Safety; Humans; Risk Assessment; Soil Pollutants; Taiwan; Vegetables
Publisher
MDPI
Type
journal article