Identifikasi Pencemaran Air Sungai Batanghari Di Kecamatan Sitiung Kabupaten Dharmasraya Berdasarkan Tinjauan Fisik dan Kimia
DOI:
https://doi.org/10.25077/jfu.9.4.510-516.2020Abstract
Penelitian ini bertujuan untuk menentukan tingkat pencemaran air sungai Batanghari di Sitiung Dharmasraya berdasarkan derajat keasaman (pH) temperatur, konduktivitas listrik, total padatan terlarut (TDS), dan kandungan logam berat Hg (Merkuri) dan Pb (Timbal). Pengambilan sampel dilakukan sebanyak enam titik di sepanjang aliran sungai segmen Sitiung. Semua parameter diukur langsung di lapangan, kecuali kandungan logam berat. Pengukuran kandungan logam berat Hg dan Pb dilakukan menggunakan Atomic Absorbtion Spectroscopy. Analisis tingkat pencemaran menggunakan metode Indeks Pencemaran air (IP). Hasil penelitian menunjukan bahwa nilai rata-rata pH total air sungai segmen Sitiung adalah 8,73 dan telah melebihi ambang batas baku mutu. Secara keseluruhan temperatur air di sungai Batanghari pada segmen ini tidak melebihi ambang batas baku mutu. Nilai konduktivitas listrik sampel air berkisar antara 34,3 dan 62,7 μS/cm dengan rata-rata total yaitu 56,63 μS/cm. Nilai TDS rata-rata adalah 29,7 ppm yang termasuk ke golongan fresh water. Nilai tertinggi kandungan Pb dalam sampel adalah 0,0034 mg/l dan Hg sebesar 0,0024 mg/l yang telah berada di atas nilai ambang batas baku mutu sebesar 0,001 mg/l. Berdasarkan nilai Indeks Pencemaran air (IP), DAS Batanghari di Sitiung dikategorikan tercemar ringan dengan nilai IP rata-rata sebesar 1,193.
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This study aims to determine the level of water pollution in the Batanghari Sitiung Dharmasraya river based on the degree of acidity (pH), temperature, electrical conductivity, total dissolved solids (TDS), and the content of heavy metals Hg (Mercury) and Pb (Lead). Sampling was carried out at six points along the Sitiung segment river flow. All parameters are measured directly in the field, except for heavy metal content. Measurement of heavy metal content Hg and Pb was done using Atomic Absorbtion Spectroscopy. Pollution level analysis uses the Water Pollution Index (IP) method. The results showed that the average pH value is 8.73 and exceed the quality standard threshold. Overall water temperature does not exceed the quality standard threshold. Electrical conductivity values of water samples ranged from 34.3 and 62.7 μS/cm with average of 56.63 μS/cm. The average TDS value is 29.7 ppm which belongs to the fresh water group. The highest value of Pb content in the sample is 0.0034 mg/l and Hg is 0.0024 mg/l which is above the quality standard threshold value of 0.001 mg/l. Based on the value of water pollution index (IP), the Batanghari river in Sitiung is categorized as mildly polluted with an average IP value of 1.193.
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