TRIYANTO, HANDI CAHYO (2022) KANDUNGAN LOGAM BERAT TIMBAL (Pb) PADA AIR, SEDIMEN, DAN LAMUN (Thalassia hemprichii) DI PERAIRAN PULAU KELAPA DUA, KEPULAUAN SERIBU(22ik379). Undergraduate thesis, Universitas Diponegoro.

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Abstract

ABSTRAK
Handi Cahyo Triyanto. 260 401 181 301 15. Kandungan Logam Berat Timbal
(Pb) pada Air, Sedimen, dan Lamun Thalassia hemprichii di Perairan Pulau Kelapa
Dua, Kepulauan Seribu (Ria Azizah Tri Nuraini dan Dwi Haryanti)
Logam berat Timbal (Pb) termasuk salah satu logam non-esensial dan
bersifat toksik. Logam berat selain mencemari kolom air, juga lama kelamaan akan
mengendap ke dasar perairan. Lamun merupakan tumbuhan yang mampu menyerap
kandungan logam berat pada perairan. Penelitian ini dilakukan untuk mengetahui
kandungan logam berat Timbal (Pb) pada air, sedimen, dan lamun Thalassia
hemprichii dengan menggunakan metode survei eksploratif. Analisis kandungan
logam Pb menggunakan Atomic Absorption Spectrophotometry (AAS) dengan
metode destruksi basah. Metode destruksi menggunakan asam-asam kuat untuk
perombakan sampel. Hasil penelitian menunjukkan bahwa air dan lamun T.
hemprcihii di Pulau Kelapa Dua sudah termasuk dalam kategori tercemar Timbal
(Pb) berdasarkan Peraturan Pemerintah Republik Indonesia No. 22 Tahun 2021,
sedangkan pada sedimen masih di bawah baku mutu yang ditetapkan oleh ANZECC
(1997). Hasil kandungan logam Pb pada air berkisar 0,53 – 1,22 ppm; pada sedimen
berkisar 0,06 – 0,41 ppm, pada akar lamun berkisar 4,20 – 10,40 ppm, dan hasil
kandungan logam Pb tertinggi ditemukan pada daun lamun berkisar 14,50 – 28,00
ppm. Nilai Biokonsentrasi (BCF) pada akar lamun berkisar 9,54 – 34,27 dan pada
daun berkisar 60,46 – 302,5. Nilai Translokasi (TF) ditemukan berkisar 2,56 –
17,29. Berdasarkan hasil tersebut, daun lamun T. hemprichii memiliki nilai tertinggi
dalam akumulasi logam berat dibandingkan pada sedimen dan air. Hal ini
menunjukkan bahwa lamun T. hemprichii tergolong tanaman akumulator di
Perairan Pulau Kelapa Dua.
Kata Kunci: Logam Berat, Timbal, Air, Sedimen, Thalassia hemprichii

ABSTRACT
Handi Cahyo Triyanto. 260 401 181 301 15. Heavy Metals Lead (Pb) Content in
Water, Sediment, and Seagrass (Thalassia hemprichii) in Kelapa Dua Island, Seribu
Island (Ria Azizah Tri Nuraini and Dwi Haryanti)
Heavy metal Lead (Pb) is one of the non-essent ial metal s and toxic. Heavy
metals is pollutant to water, and will often settle at the bottom of water. Seagrass
has the capability of absorbing heavy metal in water. This study was conducted to
learn more about Lead (Pb) content in water, sediment, and the tissue of seagrass
(T. hemprichii) using explorative surveys. Lead content was analysed using Atomic
Absorption Spectrophotometry (AAS) method with the use of wet destruction
method. Strong acidic solutions were used to dissolve the sample. The research
showed that water and seagrass T. hemprichii on Kelapa Dua Island has been
polluted with Pb based on Indonesian Government Regulation No 22 of 2021, while
the Pb content in the sediment was below the permitted limit set by ANZECC
(1997). The heavy metals Pb content in the water ranged from 0.53 – 1.24 ppm;
while in the sediment ranging from 0.006 – 0.41 ppm, and seagrass root scored
between 4.20 – 10.40 ppm, highest level of Lead content was found on seagrass leaf
with value ranging from 14,5 - 28 ppm. Based on above results, the tissue of T.
hemprichii has the highest absorption of Lead compared to the surrounding
sediment and water. Bioconcentration (BCF) values in seagrass roots ranged from
9.54 to 34.27 and in leaves ranged from 60.46 to 302.5. Translocation values (TF)
were found to range from 2.56 – 17.29. Based on above results, the leafs of T.
hemprichii has the highest absorption of Lead compared to the surrounding
sediment and water. It is revealed that T. hemprichii is classified as an accumulator
plant in the waters of Kelapa Dua Island.
Keywords: Heavy Metal, Lead, Water, Sediment, Thalassia hemprichii

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