PURNAMI, ADELIA AGUNG (2022) PENILAIAN KUALITAS AIR SUNGAI SAMIN KABUPATEN SUKOHARJO BERDASARKAN KANDUNGAN LOGAM BERAT Cr, Cu DAN Pb SEDIMEN(22m554). Undergraduate thesis, Universitas Diponegoro.

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Abstract

ABSTRAK
Adelia Agung Purnami. 26010118140037. Penilaian Kualitas Air Sungai Samin
Kabupaten Sukoharjo Berdasarkan Kandungan Logam Berat Cr, Cu dan Pb
Sedimen. (Norma Afiati dan Pujiono Wahyu Purnomo)
Logam berat seperti Pb, Cr dan Cu merupakan pencemar yang bersifat toksik dan
menurunkan kualitas perairan. Sungai Samin merupakan sungai yang mengalir
melewati Kabupaten Karanganyar dan Sukoharjo, membawa berbagai macam
limbah domestik dan industri pembuatan alkohol yang berpotensi peningkatan
logam berat. Tujuan dari penelitian ini adalah mengetahui kandungan logam berat
dan potensi cemaran logam berat pada sedimen berdasarkan faktor kontaminasi,
indeks beban pencemaran dan indeks geoakumulasi. Penelitian ini dilaksanakan
pada bulan Februari dan Maret 2022 menggunakan metode survey. Analisis logam
berat Pb, Cr dan Cu menggunakan alat Atomic Absorption Spectrophotometer
(AAS). Hasil penelitian menunjukkan kandungan logam berat Cr, Cu dan Pb pada
bulan Februari berkisar antara 3,90-4,68 mg/kg dan 14,11-30,10 mg/kg; 26,07-34,71 mg/kg sedangkan konsentrasi logam berat Cr, Cu dan Pb bulan Maret
mendapatkan angka 61,75-455,3 mg/kg; 11,03-13,16 mg/kg dan 9,99-11,87 mg/kg.
Indeks pencemaran gabungan pada bulan Februari menunjukkan segmen Sungai
Samin di Kota Sukoharjo belum tercemar logam Cr, Cu dan Pb. Namun, tingkat
kontaminasi dan indeks geoakumulasi bulan Maret logam Cr mengindikasikan
adanya input antropogenik. Tinggi rendah kadar logam berat karena jenis sedimen
dalam sungai yakni pasir halus sampai kasar. Tingkat kontaminasi logam Cu
terindikasi rendah (CF<1) dan logam Pb terdapat dua kategori yakni rendah (CF<1)
dan sedang (1<CF<2), tetapi indeks geoakumulasi logam Pb dan Cu tidak tercemar
(Igeo<0). Berdasarkan Indeks beban pencemaran menunjukkan sedimen belum
tercemar logam berat Cr, Cu dan Pb (PLI<1).
Kata Kunci : Sungai Samin, Logam Berat, Faktor Kontaminasi, Indeks Beban
Pencemaran Logam, Indeks Geoakumulasi

ABSTRACT
Adelia Agung Purnami. 26010118140037. The Quality Assessment of Sukoharjo
District Samin River Water Based on Heavy Metal Content Cr, Cu and Pb Sediment
(Norma Afiati and Pujiono Wahyu Purnomo)
Heavy metals such as Pb, Cr and Cu are toxic pollutants and reduce water quality.
The Samin River is a river that flows through Karanganyar and Sukoharjo
regencies, carrying a variety of domestic waste and the alcohol industry are the
potential to increase heavy metals. The purpose of this research is to find out the
content of heavy metals and the potential for heavy metal spruce in sediments based
on contamination factors, metal pollution index, and geoaccumulation index. This
study was conducted in February and March 2022 using survey methods. Analysis
of heavy metals Pb, Cr, and Cu using the Atomic Absorption Spectrophotometer
(ASS). The results showed that the average content of heavy metals Cr, Cu and Pb
in February and March ranged between 3,900-4,68 mg/kg; 14,11-30,10 mg/kg; and
26,07-34,71 mg/kg, and 61,75-455,3 mg/kg; 11,03-13,16 mg/kg; and 9,99-11,87
mg/kg. The combined pollution index in February that the sediment shows that Cr,
Cu and Pb metals have not been polluted. However, in March the contamination
factors and geoaccumulation index of Cr metal indicated the presence of
anthropogenic inputs. The high and low levels of heavy metals are due to the type
of sediment in the river, fine to coarse sand. The contamination factors of Cu metal
was indicated as low (CF<1) and Pb metal in two categories, low (CF<1) and
moderate (1<CF<2). The geoaccumulation index of Pb and Cu metals was not
polluted (Igeo<0). The pollution load index, the sediment condition had not
polluted with Cr, Cu and Pb metals (PLI<1).
Keywords: Samin River, Heavy Metals, Contamination Factors, Pollution Load
Index, Geoaccumulation Index

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