Analisis Hubungan Konduktivitas Listrik dengan Total Dissolved Solid (TDS) dan Temperatur pada Beberapa Jenis Air

Authors

  • Fadhilah Irwan Jurusan Fisika Universitas Andalas
  • Afdal Afdal Jurusan Fisika Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.5.1.85-93.2016

Abstract

Telah dilakukan  penelitian untuk  menentukan  hubungan konduktivitas listrik dengan Total Dissolved Solid (TDS) dan temperatur pada tiga jenis air yaitu air laut, sungai dan danau. Sampel air laut diambil di Pantai Padang, air sungai di Sungai Batang Arau dan air danau di Danau Diatas Alahan Panjang. Pada masing-masing lokasi, sampel diambil pada enam titik dengan jarak antar titik 500 m.  Sampel air laut diambil pada tiga titik dekat objek wisata dan tiga titik dekat hutan tepi pantai. Sampel air sungai diambil masing-masing pada dua titik bagian hulu, tengah dan hilir sungai. Sampel air danau diambil mulai dari pusat lahan perikanan di tepi danau menuju tengah danau. Nilai TDS ditentukan dengan metode gravimetry dan konduktivitas listrik diukur dengan conductivity meter. Rata-rata nilai TDS pada air laut sebesar 23886,7 mg/l, air sungai sebesar 1873,3 mg/l dan air danau sebesar 546,7 mg/l. Rata-rata nilai konduktivitas listrik untuk air laut sebesar 177,9 µS/cm, air sungai sebesar 139,1 µS/cm dan air danau 80,6 µS/cm. Hubungan TDS dengan konduktivitas listrik pada air laut tidak dapat dilihat karena nilai TDS sangat berosilasi dengan perubahan konduktivitas listrik. Hubungan TDS dengan konduktivitas listrik air sungai linier pada konduktivitas listrik yang kecil dan mulai tidak linier pada nilai konduktivitas listrik tinggi. Model terbaik hubungan antara TDS dan konduktivitas listrik pada air sungai dan air danau adalah model polinomial orde-2 dengan koefisien korelasi 0,9506 untuk air sungai dan 0,9896 untuk air danau .

Kata kunci: gravimetry, konduktivitas listrik, temperatur, Total Dissolved Solid (TDS) 

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Published

2016-01-01

Issue

Vol. 5 No. 1 (2016)

Section

Articles

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Copyright (c) 2016 Fadhilah Irwan, Afdal Afdal

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