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Suhu, Turbidity, Konduktivitas. MK Laboratorium Lingkungan Taty Alfiah Teknik Lingkungan ITATS. Suhu. Suhu. Penting karena : Laju reaksi biologi dan kimia dipengaruhi suhu Organisme air – mikroba s/d ikan – perlu suhu optimal agar bertahan hidup. Turbidity - Kekeruhan.

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suhu turbidity konduktivitas

Suhu, Turbidity, Konduktivitas

MK Laboratorium Lingkungan

Taty Alfiah

Teknik Lingkungan ITATS

slide3
Suhu

Penting karena :

  • Laju reaksi biologi dan kimia dipengaruhi suhu
  • Organisme air – mikroba s/d ikan – perlu suhu optimal agar bertahan hidup
turbidity kekeruhan
Turbidity - Kekeruhan
  • Merupakan ukuran kejernihan air
  • Berapa banyak material tersuspensi dalam air – yang mengurangi kemampuan air meneruskan cahaya
turbidity kekeruhan1
Turbidity - Kekeruhan
  • Material tersuspensi (berukuran 0.004 mm -1.0 mm)
    • misalnya: clay, silt, and sand, algae, plankton, microbes, dll.
  • Turbidity dapat mempengaruhi warna air.
turbidity tinggi
Turbidity tinggi
  • Mengurangi efektifitas proses desinfeksi pada air minum – biaya bahan kimia.
  • meningkatkan suhu air karena partikel tersuspensi dapat menyerap panas.
turbidity tinggi1
Turbidity tinggi
  • mereduksi kelarutan oksigen dalam air
  • mereduksi sinar matahari sehingga mereduksi fotosintesis.
  • Air tampak kotor, menyebabkan endapan
pengukuran turbidity
Pengukuran Turbidity
  • Satuan NTU: Nephelometric Turbidity Units.
pengukuran turbidity1
Pengukuran Turbidity
  • Peralatan disebut nephelometer atau turbidimeter (mengukur intensitas cahaya yang disebarkan pada 90 derajat dari cahaya yang melalui sampel air).
slide13
Konsumsi manusia – air  1 to 5 NTU
  • Nephelometric Method
    • batas deteksi 0 - 40 NTU  0.02 NTU.
slide16

In a nephelometer, light reflects off turbidity particles in the water and is measured by a photomultiplier tube.

The amount of light reaching the photomultiplier tube is proportional to the amount of turbidity in the sample water.

pengukuran turbidity2
Pengukuran Turbidity
  • Satuan lain JTU (Jackson Turbidity Units) – sudah tidak digunakan.
  • Turbidity dapat digunakan sebagai pendekatan knsentrasi TSS (Total Suspended Solids).
pengukuran turbidity3
Pengukuran Turbidity
  • Pada danau, perairan digunakan secchi disk.
slide19

Menggunakan cakram Secchi ( Secchi disk) untuk mengukur transparansiThe disk is lowered until it is no longer visible. That point is the Secchi disk depth.

slide20

Using a transparency tube(A) Prepare the tranparency tube to take a reading. Place the tube on a white surface and look vertically down the tube to see the wave pattern at the bottom.(B) Slowly pour water sample into the tube stopping intermittently to see if the wave pattern has disappeared.

conductivity konduktivitas
Conductivity - Konduktivitas
  • Konduktivitas mengukur kemampuan air dalam menghantarkan arus listrik
conductivity konduktivitas1
Conductivity - Konduktivitas
  • Konduktivitas air dipengaruhi adanya zat anorganik terlarut seperti : chloride, nitrate, sulfate,phosphate - anions (bermuatan negatif) atau sodium, magnesium, calcium, iron, aluminum – kation
conductivity konduktivitas2
Conductivity - Konduktivitas
  • Konduktivitas dipengaruhi suhu – makin tinggi suhu makin tinggi konduktivitasnya
  • Konduktivitas diukur pada 25 °C.
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