Distribution of Heavy Metals in Natuna Coastal Waters

Abstract

The study of Pb, Cd, Cu, Hg, and As and Fe in ABSTRAKPenelitian Pb, Cd, Cu, As, Hg dan Fe di perairan Pulau Natuna, Kepulauan Riau telah dilakukan. Pengambilan sampel air dan sedimen dilakukan. Sampel air dan sedimen diambil pada 35 stasiun pengamatan dengan metode purposive sampling pada Bulan November 2012. Analisa logam berat dan logam Fe permukaan dan sedimen menggunakan Spektofotometer Serapan Atom tipe nyala (FAAS). Hasil penelitian menunjukkan kadar logam berat Pb, Cd, Cu, Hg, dan As permukaan perairan Natuna sangat kecil, dibawah deteksi analisa dan memenuhi baku mutu yang ditetapkan oleh Kementerian Lingkungan Hidup Indonesia. Limit deteksi alat AAS untuk logam tersebut adalah 2µg/L untuk logam Pb, Cd, Cu, dan 0,02 µg/L utnuk Hg dan As. Konsentrasi Fe permukaan berkisar 0,021-0,054 mg/L. Kandungan logam berat Pb dan Cu dalam sedimen berturut-turut adalah 0,05-22,67 mg/kg dan 3,77-11,00 mg/kg dimana konsentrasi tertinggi dijumpai pada daerah sekitar Muara Binjai. Namun kondisi logam tersebut masih berada dibawah baku mutu CCME (2002) I. PENDAHULUANLaut Natuna memiliki sumber daya minyak dan gas alam yang berpeluang menyebabkan pencemaran akibat proses eksplorasi, transportasi ataupun

Keanekaragaman Jenis Kupu-Kupu Famili Nymphalidae di Kawasan Bukit Cogong

“…Dengan demikian, dari ketiga stasiun tersebut mempunyai keseragaman populasi yang tinggi dan komunitasnya stabil. Kriteria nilai keseragaman jenis belalang yaitu nilai E mendekati 1 maka penyebaran individu antar jenis relatif sama (Sagala, et al 2014).…”

Java Sea Surface Temperature Variability during ENSO 1997 – 1998 and 2014 – 2015

“…The variations of SST in the ITF region are generally not much as compared to that in the Tropical Pacific Ocean due to the lack of strong equatorial upwelling (Muripto, 2016). Pacific seawater mass by Indonesian Throughflow (ITF) entering to Indonesian seas through North of Halmahera Island, Molluca Sea, and Lifamatola passage, Buru Sea, South Banda Sea direction to Flores Sea, and Java Sea (Gordon et al, 2010;Pranowo, 2012;Sagala et al, 2014). The seawater mass is characterized by a sea surface temperature and a typical salinity, both in horizontally and vertically (Wardani et al, 2014;Purba & Pranowo, 2015).…”

“…In February, sea surface temperature slightly cooler in the South China Sea and Karimata Strait, while warmer sea surface temperature in the eastern region, especially in the Madura Strait and Makassar Strait. During northwest monsoon period (West Monsoon) seawater mass of the South China Sea coming to Java Sea, at the same time wind and the surface current moving eastwards (Sagala et al, 2014). In March and April, warmer SST is founded in the Madura (basin) Strait.…”

“…5, in January shows sea surface temperature was warmer in the territorial waters of the island of Java and in the eastern region. During West Monsoon, winds and currents moving from the west to the east, so the mass of water of the South China Sea to lower sea surface temperature to fill the Java Sea (Sagala et al, 2014;Siregar et al, 2017). In February, the sea surface temperature are warm in the Makassar Strait.…”

“…Warm sea surface temperature is the around of Java Island, the South China Sea and Karimata Strait. The East Monsoon period, winds move from east to west region so as to bring the mass of water is relatively lower sea surface temperature of the area east to west (Sagala et al, 2014;Siregar et al, 2017). In July to September, slightly cooler sea surface temperature in the eastern region which is the area around of Makassar Strait and warm sea surface temperature are in the western region.…”