Bioaccessibility of arsenic in lettuce and rape and its health risk assessment

doi:10.7523/j.issn.2095-6134.2015.06.003

Abstract

Abstract:

In the present study, in vitro method was used to assess human health risk of arsenic (As) in vegetables. Lettuce and rape were planted in the soil with different As pollutions, and bioaccessibility of As in the two vegetables was determined. Daily intake of As was also calculated, and the risk to human health was assessed. The results showed that the bioaccessibility of As decreased with the increasing concentration of As in the vegetables. Bioaccessibilities of As in the lettuce and rape were 29.13%-49.39% and 27.13%-51.95%, respectively, at solid-liquid ratio of 1:30. The values sharply rose to 42.39%-79.09% and 37.40%-76.59%, respectively, at solid-liquid ratio of 1:100. At the solid-liquid ratio of 1:30, the iron addition decreased the values to 22.24%-37.88% and 23.36%-47.56%, respectively, in the two vegetables, but the calcium addition made no change for the bioaccessibility of As. In raising the iron content of digestive juices by 0.0067 mol·L^-1, bioaccessibility of As could reduce by about 6.89%-11.51%. Iron can effectively reduce As intake.

Key words: arsenic, lettuce, rape, bioaccessibility, health risk assessment

CLC Number:

X825

WANG Zhenzhou, CUI Yanshan, ZHANG Zhennan, YIN Naiyi, CAI Xiaolin, DU huili. Bioaccessibility of arsenic in lettuce and rape and its health risk assessment[J]. , 2015, 32(6): 735-742.

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