利用和对陆地生物实验室过程中汞的命运进行研究。

Fate of mercury in a terrestial biological lab process using and .

机构信息

UNAM, Facultad de Química, DIQ, Edif. E-3, Laboratorios 301-302-303 , Paseo de la Investigación científica s/n. Mexico City , Mexico.

UNAM, Facultad de Ingeniería, Edif. T. , Mexico City , Mexico.

出版信息

Int J Phytoremediation. 2019;21(12):1170-1178. doi: 10.1080/15226514.2019.1612842. Epub 2019 Jun 5.

DOI:10.1080/15226514.2019.1612842

PMID:31165622

Abstract

Mercury has been extracted in Queretaro, Mexico since the 1960s. The mining wastes were open-air disposal and these mercury wastes have polluted the zone. The aim of this research was to evaluate mercury's fate in lab scale terrestrial reactors considering the following mercury species: soluble, interchangeable, strongly bound, organic, and residual ones. Soils were sampled in two former mines of Pinal de Amoles, Queretaro, Mexico (N 20° 58' to 21° 21' and West 99° 26' to 99° 43') with initial mercury concentrations were 424 ± 29 and 433 ± 12 mg kg for "La Lorena" and "San Jose" former mines, respectively. Two vegetal species and were used and 20 reactors were constructed for the lab process. Total mercury was removed to 49-79% from both soils. Mercury elemental, exchangeable, and organic species had the most removal or exchange in the process. Metal uptake, by the plants, was of 5-6% for . and 5-15% for . . Also, mercury fate was estimated to the atmosphere to be 3.3-4.5 mg m h for both soils.

摘要

自 20 世纪 60 年代以来，墨西哥克雷塔罗州一直在开采水银。采矿废物露天处理，这些水银废物污染了该地区。本研究的目的是在实验室规模的陆地反应堆中评估汞的命运，考虑到以下汞物种：可溶性、可交换、强结合、有机和残余。在墨西哥克雷塔罗州皮纳尔德阿莫勒斯的两个前矿区（北纬 20°58' 至 21°21'，西经 99°26' 至 99°43'）采集了土壤样本，初始汞浓度分别为 424 ± 29 和 433 ± 12 mg kg ，用于“拉洛雷纳”和“圣何塞”前矿区。使用了两种植物和，并为实验室过程构建了 20 个反应堆。从这两种土壤中去除了 49-79%的总汞。在这个过程中，汞元素、可交换和有机物种的去除或交换最多。植物对汞的吸收量分别为 5-6%的和 5-15%的。此外，估计这两种土壤向大气释放的汞量为 3.3-4.5 mg m h。