Tags

Type your tag names separated by a space and hit enter

Assessment of bioaccessibility and exposure risk of arsenic and lead in urban soils of Guangzhou City, China.
Environ Geochem Health. 2011 Apr; 33(2):93-102.EG

Abstract

Soil ingestion is an important human exposure pathway of heavy metals in urban environments with heavy metal contaminated soils. This study aims to assess potential health risks of heavy metals in soils sampled from an urban environment where high frequency of human exposure may be present. A bioaccessibility test is used, which is an in vitro gastrointestinal (IVG) test of soluble metals under simulated physiological conditions of the human digestion system. Soil samples for assessing the oral bioaccessibility of arsenic (As) and lead (Pb) were collected from a diverse range of different land uses, including urban parks, roadsides, industrial sites and residential areas in Guangzhou City, China. The soil samples contained a wide range of total As (10.2 to 61.0 mg kg(-1)) and Pb (38.4 to 348 mg kg(-1)) concentrations. The bioaccessibility of As and Pb in the soil samples were 11.3 and 39.1% in the stomach phase, and 1.9 and 6.9% in the intestinal phase, respectively. The As and Pb bioaccessibility in the small intestinal phase was significantly lower than those in the gastric phase. Arsenic bioaccessibility was closely influenced by soil pH and organic matter content (r (2) = 0.451, p < 0.01) in the stomach phase, and by organic matter, silt and total As contents (r (2) = 0.604, p < 0.001) in the intestinal phase. The general risk of As and Pb intake for children from incidental ingestion of soils is low, compared to their maximum doses, without causing negative human health effects. The exposure risk of Pb in the soils ranked in the order of: industrial area/urban parks > residential area/road side. Although the risk of heavy metal exposure from direct ingestion of urban soils is relatively low, the risk of inhalation of fine soil particulates in the air remains to be evaluated.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Lu Y
College of Natural Resources and Environment, South China Agricultural University, 510642, Guangzhou, China. luying@scau.edu.cn
Yin W
No affiliation info available
Huang L
No affiliation info available
Zhang G
No affiliation info available
Zhao Y
No affiliation info available

MeSH

ArsenicBiological AvailabilityChinaCitiesEnvironmental ExposureGastrointestinal TractHumansLeadMetals, HeavyRisk AssessmentSoil Pollutants

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20524051

Citation

Lu, Ying, et al. "Assessment of Bioaccessibility and Exposure Risk of Arsenic and Lead in Urban Soils of Guangzhou City, China." Environmental Geochemistry and Health, vol. 33, no. 2, 2011, pp. 93-102.
Lu Y, Yin W, Huang L, et al. Assessment of bioaccessibility and exposure risk of arsenic and lead in urban soils of Guangzhou City, China. Environ Geochem Health. 2011;33(2):93-102.
Lu, Y., Yin, W., Huang, L., Zhang, G., & Zhao, Y. (2011). Assessment of bioaccessibility and exposure risk of arsenic and lead in urban soils of Guangzhou City, China. Environmental Geochemistry and Health, 33(2), 93-102. https://doi.org/10.1007/s10653-010-9324-8
Lu Y, et al. Assessment of Bioaccessibility and Exposure Risk of Arsenic and Lead in Urban Soils of Guangzhou City, China. Environ Geochem Health. 2011;33(2):93-102. PubMed PMID: 20524051.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Assessment of bioaccessibility and exposure risk of arsenic and lead in urban soils of Guangzhou City, China. AU - Lu,Ying, AU - Yin,Wei, AU - Huang,Longbin, AU - Zhang,Ganlin, AU - Zhao,Yuguo, Y1 - 2010/06/04/ PY - 2010/03/10/received PY - 2010/05/17/accepted PY - 2010/6/5/entrez PY - 2010/6/5/pubmed PY - 2011/7/13/medline SP - 93 EP - 102 JF - Environmental geochemistry and health JO - Environ Geochem Health VL - 33 IS - 2 N2 - Soil ingestion is an important human exposure pathway of heavy metals in urban environments with heavy metal contaminated soils. This study aims to assess potential health risks of heavy metals in soils sampled from an urban environment where high frequency of human exposure may be present. A bioaccessibility test is used, which is an in vitro gastrointestinal (IVG) test of soluble metals under simulated physiological conditions of the human digestion system. Soil samples for assessing the oral bioaccessibility of arsenic (As) and lead (Pb) were collected from a diverse range of different land uses, including urban parks, roadsides, industrial sites and residential areas in Guangzhou City, China. The soil samples contained a wide range of total As (10.2 to 61.0 mg kg(-1)) and Pb (38.4 to 348 mg kg(-1)) concentrations. The bioaccessibility of As and Pb in the soil samples were 11.3 and 39.1% in the stomach phase, and 1.9 and 6.9% in the intestinal phase, respectively. The As and Pb bioaccessibility in the small intestinal phase was significantly lower than those in the gastric phase. Arsenic bioaccessibility was closely influenced by soil pH and organic matter content (r (2) = 0.451, p < 0.01) in the stomach phase, and by organic matter, silt and total As contents (r (2) = 0.604, p < 0.001) in the intestinal phase. The general risk of As and Pb intake for children from incidental ingestion of soils is low, compared to their maximum doses, without causing negative human health effects. The exposure risk of Pb in the soils ranked in the order of: industrial area/urban parks > residential area/road side. Although the risk of heavy metal exposure from direct ingestion of urban soils is relatively low, the risk of inhalation of fine soil particulates in the air remains to be evaluated. SN - 1573-2983 UR - https://www.unboundmedicine.com/medline/citation/20524051/Assessment_of_bioaccessibility_and_exposure_risk_of_arsenic_and_lead_in_urban_soils_of_Guangzhou_City_China_ L2 - https://doi.org/10.1007/s10653-010-9324-8 DB - PRIME DP - Unbound Medicine ER -