期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 637, 期 -, 页码 1166-1174出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2018.05.035
关键词
Peri-urban; Horticulture; Indirect reuse; Wastewater; Trace elements, organic microcontaminants
资金
- Spanish Ministry of Economy, Industry, and Competitiveness (MEIC) [AGL2014-59353-R]
- FPI fellowship from the MEIC [BES-2015-075745]
- Ramon y Cajal contract from the MEIC [RYC-2013-12522]
Peri-urban horticulture performs environmental and socio-economic functions and provides ecological services to nearby urban areas. Nevertheless, industrialization and water pollution have led to an increase in the exposure of peri-urban vegetables to contaminants such as trace elements (TEs) and organic microcontaminants (OMCs). In this study, the occurrence of chemical contaminants (i.e., 16 TEs, 33 OMCs) in soil and lettuce leaves from 4 farm fields in the peri-urban area of the city of Barcelona was assessed. A rural site, outside the peri-urban area of influence, was selected for comparison. The concentration of TEs and OMCs ranged from non-detectable to 803 mg/kg dw and from non-detectable to 397 mu g/kg dw respectively in the peri-urban soil, and from 6 . 10(-5) to 4.91 mg/kg fw and from non-detectable to 193 mu g/kg fw respectively in lettuce leaves. Although the concentration of Mo, Ni, Pb, and As in the soil of the peri-urban area exceeded the environmental quality guidelines, their occurrence in lettuce complied with human food standards (except for Pb). The many fungicides (carbendazim, dimetomorph, and methylparaben) and chemicals released by plastic pipelines (tris(1-chloro-2-propyl) phosphate, bisphenol F, and 2-mercaptobenzothiazole) used in agriculture were prevalent in the soil and the edible parts of the lettuce. The occurrence of these chemical pollutants in the peri-urban area did not affect the chlorophyll, lipid, or carbohydrate content of the lettuce leaves. PCA (Principal Component Analysis) showed that soil pollution, fungicide application, and irrigation water quality are the most relevant factors determining the presence of contaminants in crops. (C) 2018 Elsevier B.V. All rights reserved.
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