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To investigate the status of heavy metal pollution in lotus root samples in Shandong Province and to assess the health risk.
A total of 1 927 lotus root samples were collected by stratified random sampling method in 16 cities of Shandong Province. According to GB 5009.2682016 "Determination of Multi-elements in Food" and GB 5009.172014 "Determination of Total Mercury and Organic Mercury in Food", the contents of lead, cadmium, mercury, and arsenic in lotus root were determined and analyzed. The pollution index method was used to assess the pollution status of heavy metals in lotus roots, and the target hazard coefficient method and total target hazard coefficient method were used to quantitatively assess the health risks of heavy metals in lotus root to human health.
The four heavy metals in lotus root in Shandong Province were detected to varying degrees. The average values of lead, cadmium, mercury, and arsenic were 0.017 4, 0.004 6, 0.001 8, and 0.029 9 mg/kg, respectively. A total of 42 samples exceeding the standard were collected from 1 927 samples in this study, with an overall eligibility rate of 97.82%. The pollution index and comprehensive pollution index of the four heavy metals in lotus root were all lower than 0.7. The THQ and TTHQ values of the four heavy metals in adults and children were all less than 1.
The overall level of heavy metals in lotus roots in Shandong Province is relatively low. The health risks caused by heavy metals exposed by residents consuming lotus root are at an acceptable level, so it is suggested to continuously monitor the level of heavy metals in lotus root and evaluate its health risk.
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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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