NUKDIN, ERNITA (2013) KAJIAN PENURUNAN KUALITAS AIR SUNGAI AKIBAT KEGIATAN PENAMBANGAN PT. PUTRA MEKONGGA SEJAHTERA KECAMATAN POMALAA, KABUPATEN KOLAKA SULAWESI TENGGARA. Masters thesis, UPN ''VETERAN'' YOGYAKARTA.
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Abstract
Secara administratif lokasi daerah penelitian terletak di Kecamatan Pomalaa, Kabupaten Kolaka, Propinsi Sulawesi Tenggara. Penelitian Kualitas Air Sungai dan Laut dilakukan di lokasi IUP PT. Putra Mekongga Sejahtera. Secara geografis daerah telitian terletak pada koordinat 4°12’20.4” - 4°14’41.2” LS dan 121°37’19.7” - 121°38'36.8” BT, dengan luasan 388 ha. Geomorfologi daerah penelitian terdiri atas bentukan asal denudasional dengan dua satuan geomorfik berupa Satuan Geomorfik perbukitan terdenudasi berelief landai – agak curam (D1) dan Satuan Geomorfik Perbukitan Terdenudasi Berelief Landai - Miring (D2). Stratigrafi yang ada di daerah penelitian tersusun atas satuan batuan peridotit PMS, yang didasarkan pada pembagian satuan litostratigrafi tidak resmi. Satuan batuan ini terdiri dari dominan batuan peridotit, sebagian batuan serpentinit dan dunit. Berdasarkan hasil analisis kualitas air sungai pada daerah penelitian menunjukkan adanya beberapa unsur yang melampaui baku mutu, diantaranya: volume BOD air sungai kumoro, yakni 1.0 mg/L – 3.2 mg/L dan huko-huko 1.2 mg/L – 3.4 mg/L ( baku Mutu kelas I=2 mg/L, II=3 mg/L ), volume kadmium (Cd) air sungai kumoro, yakni 0,011 mg/L-0,019 mg/L dan huko-huko antara 0,003 mg/L- 0,023 mg/L (baku mutu kelas I,II,III dan IV= 0,01 ), dan volume khromium (Cr) air sungai kumoro, yakni 0.71 mg/L – 0.85 mg/L dan huko-huko antara 0.55 mg/L – 0.61 mg/L (baku mutu kelas I,II,III= 0,05 mg/L. kelas IV= 1 mg/L). Berdasarkan hasil pengujian sampel air sungai di daerah penelitian terdapat beberapa parameter, salah satunya adalah kromium yang merupakan bagian dari komposisi mineral yang ada dalam batuan peridotit yang melampaui standar baku mutu lingkungan perairan dengan volume antara 0.55 mg/liter – 0.85 mg/liter. Hal ini disebabkan oleh adanya media air yang melarutkan unsur – unsur yang terkandung dalam batuan khususnya kromium yang dapat menyebabkan kekeruhan air dan meningkatnya padatan tersuspensi. Dalam aktifitas penambangan terdapat beberapa aktifitas yang menyebabkan terjadinya penurunan kualitas lingkungan antara lain kegiatan pembangunan dan peningkatan spesifikasi jalan tambang, kegiatan pembukaan lahan, kegiatan pengupasan tanah penutup, kegiatan penimbunan tanah penutup, kegiatan penambangan bijih dan kegiatan pengangkutan. Untuk menangani dampak yang terjadi akibat kegiatan penambangan, maka perlu adanya rancangan penanggulangan akibat dan pengaruh penambangan terhadap lingkungan sebagai suatu bagian perencanaan kegiatan penambangan yaitu dengan cara pencegahan erosi dan reklamasi. Administratively, the location of the study area is located in Pomalaa District, Kolaka Regency , Southeast Sulawesi Province . River and marine’s water quality studies conducted in the IUP of PT . Mekongga Putra Sejahtera . Geographically located at coordinates 4 ° 12'20 .4 " - 4 ° 14'41 .2 " S and 121 ° 37'19 .7 " - 121 ° 38'36 .8 " E , with an area of 388 ha . Geomorphology of the study area consists of formations origin denudasional with two geomorphic units such as Denudation hills with sloping-a bit steep relief (D1) and Denudation hills with Ramps-Leaning relief (D2). Stratigraphy in the study area is composed of peridotite lithologies PMS, which is based on the distribution of litho units are not official. The lithologies consist of dominant rock peridotite, serpentinite rocks and dunite partially. Based on the analysis of river water quality in the area showed that there are some elements that exceed quality standards , including : BOD volume Kumoro river water , ie 1.0 mg / L - 3.2 mg / L and huko - huko 1.2 mg / L - 3.4 mg / L ( Quality raw grade I = 2 mg / L , II = 3 mg / L ) , the volume of cadmium ( Cd ) Kumoro river water , ie 0.011 mg/L-0 , 019 mg / L and huko - huko between 0,003 mg/L-0 , 023 mg / L ( standard quality class I , II , III and IV = 0.01 ) , and the volume of chromium ( Cr ) Kumoro river water , ie, 0.71 mg / L - 0.85 mg / L and huko - huko between 12:55 mg / L - 0.61 mg / L ( standard quality class I , II , III = 0.05 mg / L grade IV = 1 mg / L ) . Based on the test results of river water samples in the study area , there are several parameters , one of which is chromium which is part of the existing mineral composition in peridotite rocks that exceed environmental quality standards with a water volume of between 0.55 mg / l - 0.85 mg / liter . This is caused by the presence of water which dissolves media elements - elements contained in the rocks especially chromium which can cause increased water turbidity and suspended solids . In the mining activities there are some activities that cause environmental degradation both water quality and social , economic and public health activities such as road construction and increase in specification mining , land clearing , overburden stripping activities , events stockpiling overburden , ore mining and transportation activities . To address the impacts caused by mining activities , it is necessary to design and control due to the influence of mining on the environment as a part of the planning of mining operations by preventing erosion and reclamation
| Item Type: | Thesis (Masters) |
|---|---|
| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Erny Azyanti |
| Date Deposited: | 18 May 2016 04:40 |
| Last Modified: | 18 May 2016 04:40 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/1421 |
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