Biomonitoring Dampak Ekologis Merkuri Di Daerah Aliran Sungai Toraut Kabupaten Bolaang Mongondow

Abstract

Traditional gold mining in Toraut Watershed Bolaang Mongondow District was used Merkuri Amalgamation that produced tailing. Tailing are discharged to river and environment sorounding that can enter Toraut River and flows to the down stream Mongondow river (beach Inobonto). This study aims: 1) To determine Hg concentrations in River Toraut up stream, middle stream and down stream; 2) To determine Hg concentrations in sediment of the River Toraut up stream, middle stream and down stream; 3) To determine Hg concentrations in aquatic plantsof the River Toraut up stream, middle stream and down stream. Location research in River Toraut up stream, middle stream and down stream. Data collected by observation and laboratory analysis Merkuri concentration in River Toraut, sediment, and aquatic plant. Method data analysis are descriptif, Graphic Method and to compare with standart Goverment PP. No.82/2001 Class II. The analysis showed that the concentration of Merkuri in River Toraut up stream, in the middle stream and down stream is<0.00005 mg/l. The concentration of Merkuri in sediments River Toraut up stream, the middle stream and down stream ranged < 0.05-1.45 mg/kg dry. The concentration of Merkuri in tissue plant aquatic location up stream of the River Toraut, the middle stream and down stream range < 0.001-0.013 mg /kg wet . ABSTRAKPengolahan emas secara tradisional di Daerah Aliran Sungai (DAS) Toraut menggunakan Merkuri (Hg) dalam proses amalgamasi menghasilkan limbah. Limbah pengolahan tersebut dibuang ke sungai dan lingkungan sekitar dapat masuk ke Sungai Toraut dan mengalir sampai ke Sungai Mongondow hilir serta bermuara di laut. Penelitian ini bertujuan untuk mengetahui: 1) Konsentrasi Merkuri (Hg) di air Sungai Toraut bagian hulu, tengah dan hilir; 2) Konsentrasi Merkuri (Hg) di sedimen Sungai Toraut bagian hulu, tengah dan hilir; 3) Konsentrasi Merkuri (Hg) di tanaman air yang terdapat di Sungai Toraut bagian hulu, tengah dan hilir. Lokasi penelitian adalah Sungai Toraut bagian hulu, tengah dan hilir.Cara penelitianadalah observasi lapang dan analisis laboratorium konsentrasi merkuri yang terdapat di air Sungai Toraut, sedimen dan tanaman air. Metode analisis secara deskriptif, tabelaris dan membandingkan dengan standar baku mutu PP No.82/2001 Kelas II. Hasil analisis menunjukkan bahwa Konsentrasi Merkuri di Sungai Toraut bagian hulu, bagian tengah dan bagian hilir adalah<0,00005 mg/l. Konsentrasi Merkuri di sedimen Sungai Toraut bagian hulu, bagian tengah dan bagian hilir berkisar antara <0,05-1,45mg/ kg dry. Konsentrasi merkuri di jaringan tanaman air lokasi Sungai Toraut bagian hulu, bagian tengah dan bagian hilir berkisar antara <0,001-0,013mg/ kg wet. Kata kunci: biomonitoring, dampak ekologis merkuri, DAS Toraut Eugenia

Implementation Effectiveness of Mercury Elimination Policies in Artisanal Small-Scale Gold Mining

“…The waste disposed by the gold miners after the amalgamation process to the river without any treatments will cause water source, river, and seawater pollutions. The ecological impact of Hg in Toraut watershed, Bolaang Mongondow District reported that Hg was found in river water (< 0.00005 mg/ L), river sediment (<0.05-1.45 mg/kg), and water plant tissue (<0.001-0.013 mg/kg) [3]. The water in mining area such as Lanut Village had a Hg content at 0.0004-0.0012 mg/ L. Moreover, this study also found that the Hg content in the community (hair) was 0.171 -2.08 µg/g [4].…”