Cadmium contamination in orchard soils and fruit trees and its potential health risk in Guangzhou, China

This study examines cadmium (Cd) contamination in orchard soils and fruit trees in Guangzhou, China, and assesses its potential health risk. Soils and tissues samples of three species of fruit trees were collected from three orchards. The average soil Cd concentration was 1.27, 1.84 and 0.68 mg/kg i...

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Bibliographic Details
Published in:Environmental pollution (1987) 2006-09, Vol.143 (1), p.159-165
Main Authors: Li, J.T., Qiu, J.W., Wang, X.W., Zhong, Y., Lan, C.Y., Shu, W.S.
Format: Article
Language:English
Subjects:
Accumulator
Agriculture
Agronomy. Soil science and plant productions
Air. Soil. Water. Waste. Feeding
Animal, plant and microbial ecology
Applied ecology
Averrhoa carambola
bioaccumulation
Biological and medical sciences
Biotransformation
Cadmium
Cadmium - analysis
Cadmium - toxicity
China
Clausena lansium
dietary exposure
Dimocarpus longan
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on plants and fungi
Environment. Living conditions
Environmental Health
food contamination
Food Contamination - analysis
Fruit - chemistry
fruit trees
Fruits
fruits (food)
Fundamental and applied biological sciences. Psychology
Health risk
human food chain
Humans
Hydrogen-Ion Concentration
Medical sciences
orchard soils
Plant Leaves - chemistry
Plant Roots - chemistry
polluted soils
Public health. Hygiene
Public health. Hygiene-occupational medicine
Risk
risk assessment
Soil - analysis
Soil and water pollution
soil chemical properties
Soil Pollutants - analysis
Soil Pollutants - toxicity
soil pollution
Soil science
Terrestrial environment, soil, air
Trees
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Summary:This study examines cadmium (Cd) contamination in orchard soils and fruit trees in Guangzhou, China, and assesses its potential health risk. Soils and tissues samples of three species of fruit trees were collected from three orchards. The average soil Cd concentration was 1.27, 1.84 and 0.68 mg/kg in orchards I, II, and III, respectively. The carambola ( Averrhoa carambola) accumulated exceptionally high concentrations of Cd (7.57, 10.84, 9.01 and 2.15 mg/kg dw in root, twig, leaf and fruit, respectively), being 6.0–24 times and 4.0–10 times the corresponding tissue Cd in the longan ( Dimocarpus longan) and wampee ( Clausena lansium), respectively. Furthermore, all Cd concentrations (0.04–0.25 mg Cd/kg fw) of the fruits exceeded the tolerance limit of cadmium in foods of PR China (0.03 mg/kg fw). Our results indicate that the carambola tree has high Cd accumulation capacity and might be a Cd accumulator; and its fruit, among the three species of fruits studied, also poses the highest potential health risk to local residents. Carambola fruit can accumulate high levels of cadmium and may be a health risk for humans.
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2005.10.016