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Q89%X171; 为了解万山汞矿区弹琴蛙(Nidirana adenopleura)组织重金属富集特征及其关联,对万山汞矿区典型农田生境内弹琴蛙组织(肝脏、皮肤、股骨、肌肉和趾骨)中铬(Cr)、锰(Mn)、镍(Ni)、铜(Cu)、锌(Zn)、镉(Cd)、铅(Pb)、砷(As)、硒(Se)和汞(Hg)这10种重金属元素的生物富集特征差异进行分析,结合非负矩阵分解分析法识别重金属元素的来源及贡献,并通过灰色关联度分析法分析弹琴蛙组织重金属元素间的关联性.结果表明:重金属元素在万山汞矿区弹琴蛙体内富集程度不同,平均质量分数由大到小依次为 Zn、Cu、Mn、Pb、Se、Cr、Hg、Cd、Ni、As;Cu、Se、Cr、Ni、Cd 和 Hg主要富集在肝脏组织中,Mn、Zn和Pb主要富集在股骨和趾骨组织中,As主要富集在肌肉组织中.基于非负矩阵分解和相关分析,Hg、Cu、Cr、Pb和Se主要源于汞矿开采,As主要来源于农业活动,Mn主要来源于锰矿冶炼,Ni、Zn和Cd来源于多种复合途径.总之,两栖动物趾骨具有较好的生物指示作用,可作为一种非致命性的检测方法,用于动物重金属污染的研究.研究结果可为万山汞矿区环境污染防控和野生动物保护提供科学依据.

To date, the Xunyang mercury（Hg） mining district is the only ongoing large-scale Hg mining district in China. To understand the influence of Hg contamination mode from the Hg mining and smelting activities, 27 sampling sites in the Xunyang Hg mining district were chosen in this study. Total gaseous mercury（TGM） in ambient air was measured using a Lumex-RA915 automatic Hg analyzer in2011. Rice samples and soil samples from rhizosphere were collected systematically and simultaneously. Total Hg（THg） and methylmercury（Me Hg） concentrations in rice grain and soil samples and Hg speciation with modified sequential selective extractions were measured. The local environment was seriously polluted with Hg. The TGM（302 ± 376 ng·m-3, ranging from 24 to 2220 ng·m^-3） in the local ambient air, THg（28 ± 30 mg·kg^-1, ranging from 0.31 to 121 mg·kg^-1） and Me Hg（2.3 ± 1.9 lg·kg^-1,ranging from 0.24 to 8.9 lg·kg^-1） in soil samples were at the sample level with Hg contaminated area. The THg concentration（26 ± 16 lg·kg^-1ranging from 4.5 to 71 lg·kg^-1） in most of the rice grain samples clearly exceeds the threshold level（20 lg·kg^-1） in the Chinese national guidelines for cereals（NY 861-2004）. The inorganic mercury（IHg）（9.1 ± 5.6 lg·kg^-1, ranging from 1.2 to 24 lg·kg^-1） and Me Hg（14 ± 9.8 lg·kg^-1, ranging from 2.1 to 59 lg·kg^-1）concentration in rice grain samples were at the same level with Hg contaminated area. The main species of Hg in paddy soils reveal strong complex Hg and residue Hg. According to the correlation analysis, a Hg pollution mode from local Hg mining and smelting was hypothesized, including Hg emission, transportation, methylation, and uptake process.

The Hemlo mineralization is enigmatic compared to general Archean lode gold deposits based on the fact that is characterized by an exotic mineralogy containing elements such as As,Hg,Sb,Ba,V and Mo.The genetic concepts range from syngenetc to epigenetic types of mineralization.This reconnaissance study was designed to examine the relationshp of Hg-As minerals with respect of fluid inclusions in the Williams mine(formerly known as the Page Williams mine)covering the A and C ore zones.