In vitro bioaccessibility of potentially toxic metals (PTMs) in Baoji urban soil (NW China) from different functional areas and its implication for health risk assessment
In vitro bioaccessibility of potentially toxic metals (PTMs) in Baoji urban soil (NW China) from different functional areas and its implication for health risk assessment
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宝鸡城市土壤（中国西北地区）不同功能区潜在有毒金属（PTM）的体外生物可及性及其对健康风险评估的意义
DOI：
10.1007/s10653-018-0197-6
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发表时间：
2018-09
影响因子：
4.2
通讯作者：
Hongtao Yu
中科院分区：
文献类型：
--
作者：
Yuwei Ai;Xiaoping Li;Yu Gao;Meng Zhang;Yuchao Zhang;Xu Zhang;Xiangyang Yan;Bin Liu;Hongtao Yu
为了更好地了解不同城市土壤中PTMS(钴、铬、铜、锂、锰、镍、铅、锌)的生物可及性和植物生物有效性的概念和操作方面的问题，采集了宝鸡市区(中国西北)农业区、娱乐区、教育区、交通区、居民区和工业区的30个土壤样品，分别采用PBET、SBET、柠檬酸淋洗和Tessier顺序提取的多体外模型对其生物可达性和植物生物有效性进行了测定。选择了适合每种PTM的生物可及性和植物生物利用度的体外测量方法，并将其可靠地应用于健康风险评估。结果表明，体外模型评价每种PTM的生物可及性和植物生物利用度取决于PTM的总浓度和人类活动的影响。与生物可获得性接触有关的健康风险表明，儿童和成人在所有区域的致癌和非致癌风险均低于阈值或可接受的风险水平，但IA中儿童的铅暴露除外，表明儿童在IA中的健康风险高于其他功能区。值得注意的是，IA中铅的最高观测值与铅酸蓄电池行业密切相关，排放会影响铅在其他功能区的赋存状态，XPS的分析结果支持了这一点。因此，应持续监测和关注不同功能区居民的健康风险。
In order to better understand both the conceptual and operational aspects of bioaccessibility and phytobioavailability of PTMs (Co, Cr, Cu, Li, Mn, Ni, Pb, Zn) in different urban soils, a total of 30 soil samples from agricultural region, entertainment district, education area, traffic area, residential area and industrial area (IA) in Baoji urban city (NW China) were collected and the bioaccessibility and phytobioavailability were measured by multi-in vitro models of PBET, SBET, citric acid leaching and Tessier sequential extraction procedure, respectively. The suitable in vitro measurement of bioaccessibility and phytobioavailability for each PTM was selected and would be reliably applied for health risk assessment. The results indicated that the bioaccessibility and phytobioavailability for each PTM evaluated by in vitro models depended on PTM total concentration and anthropologic activity influence. The health risks associated with bioaccessibility of PTMs exposure showed that the carcinogenic and non-carcinogenic risks in all areas for children and adults were below the threshold or acceptable risk levels except lead exposure on children in IA, indicating there were more health risks to the children in than that in other functional areas. It was worth that the highest observation of Pb in IA would strongly correlate with lead–acid battery industries, which the emissions would influence on the occurrences of Pb distributing in the other functional areas, which were supported from the analysis results of XPS. Therefore, the continuous monitoring and attention to the health risk of inhabitants in different functional areas should be paid.
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