Palmieri Helena E L, Nalini Hermínio A, Leonel Liliam V, Windmöller Cláudia C, Santos Regis C, de Brito Walter
Nuclear Technology Development Centre/National Commission for Nuclear Energy, Caixa Postal 941, Belo Horizonte, Minas Gerais, Brazil.
Sci Total Environ. 2006 Sep 1;368(1):69-78. doi: 10.1016/j.scitotenv.2005.09.085. Epub 2005 Dec 27.
Contents of total mercury, organic carbon, total sulfur, iron, aluminum and grain size and clay mineralogy were used along with Pearson's correlation and Hg thermal desorption technique to investigate the presence, distribution and binding behavior of Hg in soils from three depths from the Tripuí Ecological Station, located near Ouro Preto, Minas Gerais State, Brazil. The soils studied had predominantly medium and fine sand texture (0.59-0.062 mm), acid character and Hg contents ranging from 0.09 to 1.23 microg/g. The granulometric distribution revealed that Hg is associated with coarse sand (2-0.59 mm) and silt and clay (<0.062 mm) and presents similar Hg concentrations in both fractions. Mercury distribution in soil profiles showed that Hg was homogeneously distributed throughout the depths at most sites. Hg thermal desorption curves show that mercury occurs not only as Hg2+ predominantly bound to organic components in most of the samples, but also in the form of cinnabar in some. Pearson's correlation confirmed that mercury is associated with organic matter and sulfur and possibly with sulfur-bearing organic matter in most samples.
利用总汞、有机碳、总硫、铁、铝的含量以及粒度和粘土矿物学，结合皮尔逊相关性和汞热脱附技术，对位于巴西米纳斯吉拉斯州欧鲁普雷图附近的特里普伊生态站三个深度土壤中汞的存在、分布和结合行为进行了研究。所研究的土壤主要为中细砂质地（0.59 - 0.062毫米），呈酸性，汞含量在0.09至1.23微克/克之间。粒度分布表明，汞与粗砂（2 - 0.59毫米）以及粉砂和黏土（<0.062毫米）相关，且在这两个粒级中的汞浓度相似。土壤剖面中的汞分布表明，在大多数地点汞在整个深度上分布均匀。汞热脱附曲线表明，在大多数样品中汞不仅主要以Hg2+形式与有机成分结合存在，而且在一些样品中还以辰砂形式存在。皮尔逊相关性证实，在大多数样品中汞与有机质和硫相关，可能还与含硫有机质相关。
