Diffuse soil fluxes of gaseous elemental mercury (GEM) were measured in a hydrothermal area (20,000 m²) located inside “Le Biancane” natural park, north of Monterotondo Marittimo village (Larderello-Travale geothermal field, Central Italy), using a static closed chamber (SCC) coupled with a Lumex® RA-915 M portable analyzer. At 89 sites, GEM and CO₂ fluxes (ϕGEM and ϕCO₂, respectively) and temperature at the soil-air interface were measured. The ϕGEM values showed no correlation with those of ϕCO₂ and soil temperatures, suggesting that secondary chemical-physical processes affected these gases as they move toward the surface. Formation of Hg-bearing minerals from primary GEM and secondary Hg²⁺, as well as secondary GEM production likely occurred through processes mediated by microbial activity, particularly in those areas characterized by soils affected by strong air contamination (CO₂/N₂ ratio < 0.1), where high ϕGEM and low ϕCO₂ values were measured. The total output of the measured gas species was equal to 1.6 × 10⁻⁶ and 3.15 t day⁻¹ for GEM and CO₂, respectively, while the computed GEM specific output was of 8.0 × 10⁻⁵ g day⁻¹ m⁻², i.e. in the same order of magnitude of other hydrothermal areas worldwide.

在位于Monterotondo Marittimo 村（Larderello-Travale 地热田，意大利中部）以北的“ Le Biancane ”自然公园内的热液区（20,000 m ²）中，使用静态封闭式测量了气态元素汞 (GEM) 的扩散土壤通量室 (SCC) 与 Lumex® RA-915 M 便携式分析仪结合使用。在 89 个地点，测量了 GEM 和 CO ₂通量（分别为ϕGEM 和 ϕCO ₂）以及土壤-空气界面处的温度。ϕGEM 值与 ϕCO ₂和土壤温度没有相关性，表明二次化学物理过程影响了这些气体向地表移动。原生 GEM 和次生 Hg ²⁺含汞矿物的形成以及二次 GEM 生产可能通过微生物活动介导的过程发生，特别是在那些土壤受强烈空气污染（CO ₂ /N ₂比 < 0.1）影响的地区，其中测量到高 ϕGEM 和低 ϕCO ₂值。对于GEM和CO ₂，测得的气体种类的总输出分别等于1.6×10 ^-6和3.15 t day ^-1，而计算出的GEM比输出为8.0×10 ^-5  g day ^-1  m ^-2，即与全球其他热液区处于同一数量级。