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| Risk assessment of heavy metals in Lentinula edodes and the role of substrate in accumulation of heavy metals |
| Received:September 20, 2018 |
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| KeyWord:heavy metal;Lentinula edodes;substrate;target hazard quotient (THQ) |
| Author Name | Affiliation | E-mail | | LIU Zhe | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | WANG Kang | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | MU Hong-yu | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | ZHUANG Jian | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | LI Hua-fen | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | lihuafen@cau.edu.cn |
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| Abstract: |
| In order to investigate the heavy metals content in Lentinula edodes in the Beijing market and its dietary effect on human health, 107 fungi samples were collected. The levels of Cd, As, Hg, and Pb were measured, and the dietary risks of the four heavy metals to human health were evaluated through the target hazard quotient (THQ) method. Additionally, the correlation between the heavy metals contents in the cultivation substrate and those in L. edodes was studied. The results showed that the contents of Cd, As, Hg, and Pb in the collected samples were ND~0.76, 0.01~0.30, ND~0.03 mg·kg-1, and ND~1.79 mg·kg-1, respectively. The over-standard rates of Cd and Pb were both 5.6%, while no Hg or As contents exceeded the standard. No significant differences were observed between the heavy metals contents in fresh and dried mushrooms. The contents of Cd, As, and Pb in the fruiting bodies of L. edodes were significantly correlated with those in the substrate. The enrichment coefficient of Cd is the largest, which is 3.70, 5.67 and 1.63 times of As, Hg, and Pb, respectively. The THQs of the four heavy metals were all within the safe threshold, but it was noteworthy that the THQ of As for children was relatively high. Therefore, the major pollution factors of L. edodes in circulation in Beijing were Cd and Pb, and Cd in the cultivation substrate was more easily absorbed and accumulated by the fruiting body of L. edodes. |
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