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Objective To investigate the pollution of organophosphorus flame retardants (OPFRs) in soil and nuts in the primary Carya illinoensis production areas of Anhui Province, and evaluate the ecological risk and human health risk. Methods A total of 15 soil and nut samples were collected from the main production areas of Carya illinoensis in Anhui Province, and the pollution characteristics of 14 kinds of OPFRs were analyzed. The ecological risk of soil was evaluated using the risk quotient (RQ) method, and the human health risk of consuming nuts was assessed using a health risk assessment model. Results The concentration range of OPFRs in soil samples from Carya illinoensis production areas in Anhui Province was 162.33-394.48 μg/kg, with an average of 305.83 μg/kg. Tris(2-ethylhexyl)phosphate (TEHP) had the highest detection concentration, at 52.62 μg/kg. The concentration range of OPFRs in nut samples was 127.57-310.81 μg/kg, with an average of 223.93 μg/kg. Tris(2-ethylhexyl) phosphate (TEHP) had the highest detection concentration, averaging 46.82 μg/kg. The RQ values of 11 kinds of OPFRs ranged from 3.50×10-5 to 0.47, with tris(1,3-dichloro-2-propyl) phosphate (TDCIPP), triphenyl phosphate (TPhP), and 2-ethylhexyl diphenyl phosphate (EHDPP) having RQ values between 0.1 and 1.0. The remaining RQ values were all less than 0.1. The health risk assessment of human intake of pecan showed that the hazard quotient (HQ) values of children and adults were both less than 0.1, and the risk of intake of TBEP was higher in children and adults, with the HQ value of adults slightly higher than that of children. Conclusion There is a particular ecological risk of OPFRs in the soil of some production areas of Carya illinoensis in Anhui Province, and the residues of OPFRs in nuts can be ignored in terms of human health risk. This study provides a basis for the safety assessment of novel pollutants in the soil and nuts of Carya illinoensis production areas.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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