Assessment of nutrients effect on the bioaccessibility of Cd and Cu in contaminated soil
Assessment of nutrients effect on the bioaccessibility of Cd and Cu in contaminated soil
复制标题
营养盐对污染土壤中镉和铜生物可及性的影响评估
DOI：
10.1016/j.ecoenv.2020.110913
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发表时间：
2020
影响因子：
6.8
通讯作者：
Yanshan Cui
中科院分区：
文献类型：
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作者：
Mst Sharmin Sultana;Pengfei Wang;Naiyi Yin;Md Hafizur Rahman;Huili Du;Xiaolin Cai;Yaqi Fu;Yanshan Cui
土壤被认为是重金属的汇。即使是很低浓度的有毒重金属，持续摄入也会严重影响人体健康。采用生理提取试验（PBET）和模拟人肠道微生物生态系统（SHIME）模型，研究了不同营养状态（对照（禁食）、葡萄糖（进食）、植物蛋白（进食）、动物蛋白（进食）和钙（进食））对土壤镉（Cd）和铜（Cu）生物有效性的影响。Cd的生物可利用性在Ⅰ、Ⅱ、Ⅲ期分别为1.06- 73.58%、0.44-54.79%、0-17.78%; Cu的生物可利用性在Ⅰ、Ⅱ、Ⅲ期分别为3.81- 67.32%、4.98- 71.14%、0- 17.54（本研究中，胃期、小肠期和结肠期分别被认为是I期、II期和III期）。结果表明，在不同阶段，添加动物蛋白的Cd生物有效性均高于其他处理。因此，在I、II、III阶段，动物蛋白对Cd生物可利用性的影响大于其它处理。由于添加植物蛋白，铜的平均生物可利用性较高，注意到在第一阶段和第二阶段相比，其他治疗。而在第三阶段，由于对照处理铜的平均生物可利用性高于其他处理。因此，植物蛋白对铜生物可利用性的影响在第一阶段和第二阶段高于其他营养元素。此外，其他营养物质对镉和铜的生物可利用性表现出不同的影响。因此，营养状况对生物可及性以及人类健康风险评估具有重要影响。
Soil is considered as a sink for heavy metals. Human health is severely affected by the continuous intake of toxic heavy metals even in a very low concentration. In the present experiment, we determined the influence of nutritional status including control (fasted condition), glucose (fed state), plant protein (fed state), animal protein (fed state) and calcium (fed state) on soil cadmium (Cd) and copper (Cu) bioaccessibility using physiologically-based extraction test (PBET) method together with simulator of the human intestinal microbial ecosystem (SHIME) model. The bioaccessibility of Cd was 1.06–73.58%, 0.44–54.79% and 0–17.78% and Cu was 3.81–67.32%, 4.98–71.14%, and 0–17.54% in the phase-I, phase-II and Phase-III respectively (in this study gastric phase, small intestinal phase and colon phase were considered as phase-I, phase-II and Phase-III respectively). The outcomes showed that, the average Cd bioaccessibility was higher with animal protein addition compared with other treatments in different phases. So, the effect of animal protein on Cd bioaccessibility was higher than other treatments in the phase-I, phase-II and phase-III. Due to the addition of plant protein, the higher average bioaccessibility of Cu was noticed in phase-I and phase-II in comparison to other treatments. However, in phase-III, the higher average bioaccessibility of Cu was found due to control treatment comparing with other treatments. Therefore, the influence of plant protein was higher than other nutrients on Cu bioaccessibility in the phase-I and phase-II. Moreover, other nutrients showed variable influence on Cd and Cu bioaccessibility. So, nutritional status has a significant effect on bioaccessibility as well as human health risk assessment.