Geogenic molybdenum in ground and drinking water

一般来说，饮用水中的Mo浓度远低于健康关注的浓度，迄今为止，世界卫生组织（世卫组织）尚未确定指导值，但发布了一项建议，即饮用水中的Mo不应超过70 μg/L。因此，最近在佛罗里达州中部发现的地下水钼（Mo）浓度超过5000微克/升引起了人们的关注。在那里，钼是自然发生的（地球成因的），但由于人为干扰了含水层的物理化学条件而释放出来。这种由地质因素引起的人为污染是世界范围内的一个公共卫生问题。特别是孟加拉国和西孟加拉邦正在发生的砷（As）灾难性问题成为报纸和科学期刊的头版新闻。虽然钼的毒性比砷小得多，但也可能引起同样的关注，特别是在海洋来源的含水层中，那里的钼含量已经自然升高。为了更好地了解地球成因钼污染的可能性，提出了一种多学科方法来评估其可能从几个海洋来源的含水层释放。最终目标将是通过（地球）化学、水文地质和矿物学分析的结合，以及在反应输运模型框架中对这些结果进行量化，对钼的动员形成一个整体的理解。

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.