文献类型：期刊文献

英文题名：Risk assessment and prediction for toxic heavy metals in chestnut and growth soil from China

作者：Wu, Shutian[1] Zheng, Yuewen[1] Li, Xianbin[2] Han, Yongxiang[1] Qu, Minghua[1] Ni, Zhanglin[1] Tang, Fubin[1] Liu, Yihua[1]

第一作者：Wu, Shutian

通信作者：Liu, YH[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Peoples R China;[2]Minist Agr & Rural Affairs, Inst Control Agrochem, Beijing, Peoples R China

年份：2019

卷号：99

期号：8

起止页码：4114-4122

外文期刊名：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE

收录：;Scopus(收录号：2-s2.0-85063511209);WOS:【SCI-EXPANDED(收录号:WOS:000468053600044)】；

基金：This study was supported by the Fundamental Research Funds of CAF (CAFYBB2017QC002) and the Special Fund for Forestry Scientific Research in the Public Interest (201304705). The authors declare that there are no conflicts of interest.

语种：英文

外文关键词：chestnut; soil; toxic heavy metal; risk assessment; prediction model

摘要：BACKGROUND Toxic heavy metals (THMs) cause severe environmental hazards and threaten human health through various consumption of food stuff. However, little is known of THMs in chestnuts. In this study, the risk assessment and prediction of THMs [lead (Pb), arsenic (As), chromium (Cr), cadmium (Cd) and mercury (Hg)] in chestnuts and growth soils from China were investigated. RESULTS The main detected THMs in chestnuts and growth soils were As and Cd. The total pollution levels of the five THMs (Nemerow pollution indexes, NPIs) were 0.062 and 1.06, respectively. The dietary risks for children were higher than those of adults, especially short-term non-carcinogenic risk. The main combined risks from the relationships between THMs were Pb-Cr (r = 0.85, P < 0.01) in chestnuts and Pb-As (r = 0.59, P < 0.01) in growth soils. The risk source was found to be the uptake effect of THMs from soil to chestnut, with the highest bioaccumulation factors (BCFs) of Cd (0.254). Several comprehensive risk models were established with the highest coefficient of determination (R-2) of 0.79. In addition, the main contribution rates of different soil parameters to comprehensive risk of THMs uptake were 49.8% (Cd), 23.4% (pH), 13.8% (Cr) and 13.0% (organic carbon). CONCLUSION The total pollution levels of THMs fell outside of the safety domain in growth soils. Furthermore, more attention needs to be paid to Cd pollution owing to its low environment background value and high accumulation ability. Three main soil parameters (Cr content, pH, organic carbon) played important roles in the formations and accumulations of THMs in chestnuts. (c) 2019 Society of Chemical Industry