Geogenic molybdenum in ground and drinking water

土壤和饮用水中的地质钼

• 批准号: 403725837
• 负责人: Professor Dr. Thomas Pichler
• 金额: --
• 依托单位: Fachgebiet Geochemie und Hydrogeologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/403725837?language=en
• 关键词: Geogenic; molybdenum; ground; drinking; water

Generally Mo occurs in drinking water at concentrations well below those of health concern and thus far the World Health Organization (WHO) has not established a guideline value, but published a recommendation that Mo should not exceed 70 μg/L in drinking water. Thus, the recent discovery of groundwater molybdenum (Mo) concentrations of more than 5000 µg/L in Central Florida raises concern. There the Mo is naturally occurring (geogenic), but released due to anthropogenic perturbations of the physicochemical conditions in the aquifer. This type of anthropogenic-induced contamination by geogenic elements is a public health issue worldwide. In particular the ongoing catastrophic problems with arsenic (As) in Bangladesh and West Bengal are front-page stories in newspapers and scientific journals. Although much less toxic than As, Mo may prove to be of similar concern, particularly in aquifers of marine origin where Mo is already naturally elevated.To better understand the possibility of anthropogenic-induced contamination by geogenic Mo a multidisciplinary approach is proposed to evaluate its possible release from several aquifers of marine origin. The ultimate goal will be to develop an integral understanding of Mo mobilization through a combination of (geo)chemical, hydrogeological and mineralogical analyses together with the quantification of these results in a reactive transport model framework.

一般来说，饮用水中钼的含量远低于健康关注值，到目前为止，世界卫生组织(世卫组织)尚未制定指导值，但发布了一项建议，即饮用水中的钼不应超过70μg/L。因此，最近在佛罗里达州中部发现的地下水钼浓度超过5,000微克/L的事件引起了人们的关注。在那里，钼是自然存在的(地源)，但由于含水层中物理化学条件的人为扰动而释放。这种由地质因素引起的人为污染是一个世界性的公共卫生问题。尤其是孟加拉国和西孟加拉邦持续存在的砷灾难性问题成为报纸和科学期刊的头版新闻。虽然钼的毒性比As小得多，但它可能被证明是类似的问题，特别是在海洋成因的含水层中，钼已经自然升高。为了更好地了解人为成因钼污染的可能性，提出了一种多学科的方法来评估其从几个海洋成因含水层释放的可能性。最终目标将是通过结合(地质)化学、水文地质学和矿物学分析以及在反应迁移模型框架中量化这些结果，对钼的活化有一个完整的理解。