Analysis of Mercury in Water and Sediment Distribution and Its Bioaccumulation Potential in Fish in the Small Scale Gold Mining Area (Case Study: Ciberang River, Lebak, Banten)

Desiana Prilia, Katharina Oginawati, Herto Dwi Ariesyady

 

ABSTRACT

The existence of small scale gold minings which located in Kecamatan Lebakgedong, Lebak, Banten Province are potentially contaminate the aquatic environment since the tailing from amalgamation process are directly discharged into water body. Sampling was done for 15 points spread from the upstream in Cisoka River to the downstream in Ciberang River. The extract of water, sediment, and fish samples were examined to get Hg content using Atomic Absorption Spectrophotometry (AAS). The results showed that 14 water samples were under the quality standards based on Indonesia Government Regulation 82/2001 amounted 2 mg/m3, while there were one sample had very high Hg concentration amounted 66.6 mg/m3. For sediment, all samples were above quality standards based on US EPA 2012 amounted 180 mg/m3, with the highest Hg concentration 43,508.3 mg/m3. The BCF calculation of Channa striata and Barbonymus gonionotus provided value above 1,000, which is in the range of 1,561.11 to 4,354.17. The mercury distribution maps were shown by ArcGIS 9.3. The maps are covering mercury pollution in water and sediment, pollutant source location, river water discharge, pH, conductivity, and overlaye of each map.

Keywords: Fish bioaccumulation; mapping; mercury; sediment; small scale gold mining

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doi:10.11912/jws.3.2.107-116