Analisis Kualitas Sedimen Sungai Segah Kabupaten Berau Provinsi Kalimantan Utara

ABSTRAKSungai Segah adalah salah satu sungai terbesar yang berada di Kabupaten Berau. Sungai Segah membentang dari hulu Kecamatan Segah dan bertemu dengan Sungai Kelay tepat di jantung kota Tanjung Redeb pusat pemerintahan Kabupaten Berau. Penelitian ini bertujuan untuk menilai tingkat kontaminasi sedimen oleh pencemaran logam berat Cr, Cu, Cd, Pb, dan Zn. Sedimen merupakan tempat akumulasi logam berat dalam ekosistem perairan. Sedimen merupakan tempat akumulasi logam berat dalam ekosistem perairan. Logam berat akan terlepas dan menjadi sumber pencemaran di perairan tersebut. Sedimen memegang peranan penting dalam pergerakan dan akumulasi logam berat yang berpotensi menimbulkan dampak toksisitas terhadap biota. Metode penelitian menggunakan contamination Factor, diharapkan dapat memberi gambaran nyata mengenai pencemaran lima logam berat yaitu Cr, Cu, Cd, Pb, dan Zn yang terjadi sehingga dapat memberikan masukan untuk pengelola sungai dalam mengambil langkah pengendalian pencemaran air yang tepat. Berdasarakan hasil penelitian dapat disimpulkan bahwa konsentrasi lima logam berat yaitu Cr, Cu, Cd, Pb, dan Zn yang terkandung di Sungai Segah masih memenuhi bakumutu berdasarkan ANZECC, 1995. Berdasarkan penilaian kualitas sedimen Sungai Segah dengan menggunakan metode Cf dinyatakan bahwa sedimen telah tercemar oleh logam berat terutama Cd dengan katagori tercemar sangat berat. Sumber logam berat Cd dan logam berat lainnya diprediksi berasal dari aktivitas pertambangan di DAS Segah. Diperlukan upaya pengendalian pencemaran dari sumbernya supaya pencemaran sedimen di sungai ini tidak menimbulkan dampak lebih lanjut.Kata Kunci: Berau, Contamination Factor, Segah, SedimenABSTRACTSegah River is one of the largest rivers located in Berau District. Segah River stretches from upstream of Segah District and meets Kelay River right in the heart of Tanjung Redeb district of Berau District Government. This study aims to assess the level of sediment contamination by heavy metal pollution Cr, Cu, Cd, Pb, and Zn. Sediments are places of heavy metal accumulation in aquatic ecosystems. Sediments are places of heavy metal accumulation in aquatic ecosystems. Heavy metal will be released and become a source of pollution in these waters. Sediments play an important role in the movement and accumulation of heavy metals that could potentially impact toxicity to biota. The research method using contamination Factor is expected to give a real picture of the contamination of five heavy metals that Cr, Cu, Cd, Pb, and Zn that occur so as to provide input for river managers in taking appropriate water pollution control measures. Based on the result of the research, it can be concluded that the concentration of five heavy metals of Cr, Cu, Cd, Pb, and Zn contained in Segah River still fulfill stream standard based on ANZECC, 1995. Based on the assessment of Segah River sediment quality using Cf method it is stated that sediment has been contaminated by heavy metal especially Cd with the heavy contaminated category. Sources of heavy metals Cd and other heavy metals are predicted to come from mining activities in the Segah River Basin. There is a need to control pollution from the source so that sediment contamination in the river will not cause a further impact.Keywords: Berau, Contamination Factor, Segah, Sedimen