UBM表征老化土壤中Pb的可给性及影响因素

发布时间：2018-01-06 20:18

本文关键词：UBM表征老化土壤中Pb的可给性及影响因素　出处：《中国环境科学》2017年05期 　论文类型：期刊论文

更多相关文章： UBM BCR Pb 可给性 影响因素

【摘要】：采用UBM方法对采自大连和株洲的11个土样中Pb的人体可给性进行表征,结果显示,土样中Pb在胃阶段的人体可给性为21.1%~77.9%,平均值为54.5%;肠提取阶段的人体可给性0.2%~4.2%,平均值为0.7%.Pb在胃阶段可给性浓度与土样中总Pb、锰、磷含量正相关性明显,而肠阶段可给性浓度与总Pb以及胃阶段Pb可给性浓度正相关明显.土样中弱酸可提取态Pb、可还原态Pb以及可氧化态Pb与胃、肠阶段Pb可给性浓度显著正相关,对其贡献较大.此外,BCR表征为残渣态的Pb在酸性胃液中部分依然可溶解.
[Abstract]:By the method of UBM collected from 11 soil samples of Dalian and Zhuzhou in the Pb body to characterize, results showed that the soil Pb in the stage of human gastric availability was 21.1%~77.9%, the average value is 54.5%; the human intestinal extraction phase to 0.2%~4.2%, with an average of 0.7%.Pb in the gastric phase for the total Pb concentration and soil manganese, phosphorus content was significantly positive correlation, and intestinal availability and total concentration of stage Pb and stage Pb of gastric acid concentration is a significant positive correlation. Soil Pb extractable, reducible and oxidizable Pb Pb and gastric and intestinal phases Pb can give concentration was positively correlated to the larger contribution. In addition, the characterization of BCR residual fractions of Pb in acidic gastric juice in part can still be dissolved.

【作者单位】：北京市环境保护科学研究院污染场地风险模拟与修复北京市重点实验室国家城市环境污染控制工程技术研究中心;
【基金】：环境保护公益性行业科研专项(201409047)
【分类号】：X53
【正文快照】： 据世界卫生组织(WHO)报告显示,由于铅(Pb)污染造成的疾病负担占总疾病负担的0.9%,在所有疾病负担种类中列第16位,且大部分Pb污染集中于不发达国家[1].我国是一个Pb生产大国,其产量已达到全球产量的43.7%[2].Pb冶炼废气与含Pb废水排放、早期含Pb汽油的使用已导致Pb在环境介质中

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