Uptake Kinetics and Trophic Transfer of Tungsten from Cabbage to a Herbivorous Animal Model,Environmental Science & Technology

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Uptake Kinetics and Trophic Transfer of Tungsten from Cabbage to a Herbivorous Animal Model
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acs.est.7b04376
James H. Lindsay ₁ , Alan J. Kennedy ₁ , Jennifer M. Seiter-Moser ₁ , Anthony J. Bednar ₁ , Robert E. Boyd ₁ , David R. Johnson ₂ , Paul Allison ₃ , Ryan V. Tappero ₄

Affiliation

This investigation builds on previous studies on military-relevant tungsten (W) to more thoroughly explore environmental pathways and bioaccumulation kinetics during direct soil exposure versus trophic transfer and elucidate its relative accumulation and speciation in different snail organs. The modeled steady-state concentration and bioaccumulation factor (BAF) of W from soil into cabbage were 302 mg/kg and 0.55, respectively. Steady-state concentrations (34 mg/kg) and BAF values (0.05) obtained for the snail directly exposed to contaminated soil were lower than trophic transfer by consumption of W-contaminated cabbage (tissue concentration of 86 mg/kg; BAF of 0.36). Thus, consumption of contaminated food is the most important pathway for W mobility in this food chain. The highest concentrations of W compartmentalization were in the snail’s hepatopancreas based on wet chemistry and synchrotron-based investigations. Chemical speciation via inductively couple plasma mass spectrometry showed a higher degree of polytungstate partitioning in the hepatopancreas relative to the rest of the body. Based on synchrotron analysis, W was incorporated into the shell matrix during exposure, particularly during the regeneration of damaged shell. This offers the potential for application of the shell as a longer-term biomonitoring and forensics tool for historic exposure.

中文翻译：

钨从白菜到草食动物模型的吸收动力学和营养转化

这项研究建立在先前与军事相关的钨（W）研究的基础上，以更彻底地探索直接土壤暴露与营养转移之间的环境途径和生物蓄积动力学，并阐明其在不同蜗牛器官中的相对积累和形态。从土壤到白菜的W的稳态浓度和生物累积因子（BAF）的模型分别为302 mg / kg和0.55。直接暴露于受污染土壤的蜗牛的稳态浓度（34 mg / kg）和BAF值（0.05）低于通过摄入W污染的白菜的营养传递（组织浓度为86 mg / kg; BAF为0.36）。因此，食用受污染的食物是该食物链中W迁移的最重要途径。根据湿化学和基于同步加速器的研究，W间隔的最高浓度在蜗牛的肝胰腺中。通过电感耦合等离子体质谱法进行的化学形态分析表明，相对于人体的其余部分，肝胰腺中的聚钨酸盐分配程度更高。根据同步加速器分析，在暴露过程中，特别是在受损壳的再生过程中，W被掺入到壳基质中。这提供了将壳作为长期生物监测和取证工具用于历史性暴露的潜力。根据同步加速器分析，在暴露过程中，特别是在受损壳的再生过程中，W被掺入壳基质中。这提供了将壳作为长期生物监测和取证工具用于历史性暴露的潜力。根据同步加速器分析，在暴露过程中，特别是在受损壳的再生过程中，W被掺入壳基质中。这提供了将壳作为长期生物监测和取证工具用于历史性暴露的潜力。

更新日期：2017-11-15

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