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首页> 外文期刊>Environmental Geology >Time variation in transfer amounts of mercury by a river system near an artisanal and small-scale gold mining area in West Java, Indonesia
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Time variation in transfer amounts of mercury by a river system near an artisanal and small-scale gold mining area in West Java, Indonesia

机译：印度尼西亚西爪哇省一个手工小规模采金区附近河流系统的汞迁移量随时间的变化

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摘要

To evaluate the impact of mercury released into a river system by artisanal and small-scale gold mining (ASGM) activity in West Java, Indonesia, the temporal variations in elemental mercury, mercury ions, dissolved total mercury and particulate mercury concentrations in river water were observed in March 2015 (rainy season) and August 2015 (dry season) at a fixed observation point, and the migrated amount of mercury was estimated. Variations for other metals, total organic carbon (TOC), and total nitrogen (TN) contents were also measured. There have been few reports in which the amount of mercury transferred from ASGM activities is quantitatively estimated, and this study provides important data for evaluating the environmental impact of mercury released by ASGM activities. The concentration of filtered total mercury and the particulate mercury concentration observed in the dry season were 161 +/- 167 mu g L-1 and 142 +/- 93 mu g L-1, respectively, and these values were significantly higher than the values of 24.5 +/- 23.9 mu g L-1 and 53.7 +/- 44 mu g L-1 for filtered total mercury and particulate mercury, respectively, observed in the rainy season. On the other hand, the river flow in the rainy and dry seasons was 2.6 x 10(4) +/- 5x10(3) m(3) h(-1) and 8.2 x 10(3) +/- 8x10(2) m(3) h(-1), respectively, and an apparent increase in the amount of water in the rainy season was observed. The transfer amounts in the rainy and dry seasons obtained from these results were 6.2 x 10(2) +/- 6.7 x 10(2) g h(-1) and 1.6 x 10(3) +/- 1.6 x 10(3) g h(-1), respectively, for filtered total mercury and 1.3 x 10(3) +/- 1.3 x 10(3) g h(-1) and 1.1 x 10(3) +/- 7 x 10(2) g h(-1), respectively, for particulate mercury. The temporal variations in these values exhibited a wide range, indicating the effects of weather conditions and of the mining process.
机译：为了评估印度尼西亚西爪哇省手工和小规模采金活动释放的汞对河流系统的影响，计算了河水中元素汞，汞离子，总溶解汞和汞颗粒浓度的时间变化。在2015年3月（雨季）和2015年8月（旱季）的固定观测点进行了观测，并估算了汞的迁移量。还测量了其他金属，总有机碳（TOC）和总氮（TN）含量的变化。很少有报告定量估计从手工和小规模采金活动中转移的汞量，这项研究为评估手工和小规模采金活动释放的汞对环境的影响提供了重要数据。在干燥季节观察到的过滤后总汞浓度和微粒汞浓度分别为161 +/- 167μgL-1和142 +/- 93μgL-1，这些值明显高于该值在雨季分别观察到过滤后的总汞和微粒汞分别为24.5 +/- 23.9μg L-1和53.7 +/- 44μgL-1。另一方面，雨季和旱季的河流量为2.6 x 10（4）+/- 5x10（3）m（3）h（-1）和8.2 x 10（3）+/- 8x10（2） ）m（3）h（-1），观察到雨季的水量明显增加。从这些结果获得的雨季和旱季的转移量分别为6.2 x 10（2）+/- 6.7 x 10（2）gh（-1）和1.6 x 10（3）+/- 1.6 x 10（3） gh（-1），分别用于过滤后的总汞和1.3 x 10（3）+/- 1.3 x 10（3）gh（-1）和1.1 x 10（3）+/- 7 x 10（2）gh （-1）分别用于微粒汞。这些值的时间变化表现出很大的范围，表明天气状况和采矿过程的影响。

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