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Pengaruh Padat Populasi Gulma Mata Ikan (Lemna minor L) Terhadap Penyerapan
Logam Timbel [Pb] dan Seng [Zn] dari Air Limbah Tekstil
(The Effect of Duckweed (Lemna minor L) Population Densities on The Absorption of
Lead and Zinc from Textile Waste Water)
Oleh,
Yusticio Dwinanda Setyawan
NIM: 652008004
TUGAS AKHIR
Diajukan kepada Program Studi : Kimia, Fakultas : Sains dan Matematika guna memenuhi sebagian dari persyaratan untuk mencapai gelar Sarjana Sains
Program Studi Kimia
Fakultas Sains dan Matematika Universitas Kristen Satya Wacana
Salatiga 2012
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Pengaruh Padat Populasi Gulma Mata Ikan (Lemna minor L) Terhadap
Penyerapan Logam Timbel [Pb] dan Seng [Zn] dari Air Limbah Tekstil
(The Effect of Duckweed (Lemna minor L) Population Densities on The Absorption
of Lead and Zinc from Textile Waste Water)
Yusticio Dwinanda Setyawan *, A. Ign Kristijanto**, Santoso Sastrodihardjo**
* Mahasiswa Program Studi Kimia Fakultas Sains dan Matematika** Dosen Program Studi Kimia Fakultas Sains dan Matematika
Universitas Kristen Satya Wacana Jalan Diponegoro 52-60 Salatiga ([email protected])
Abstract
The objectives of this study are: firstly to determine the effectiveness of lead (Pb) and zinc (Zn) absorption by different population densities of duckweed (Lemna minor L), and secondly to determine the optimum of duckweed population densities on the Pb and Zn absorption. Data were analyzed by Randomized Completely Block Design (RCBD), 6 treatments and 4 replications. As the treatments are various percentage surface area coverage of the bucket by duckweed, which are: 0% (control, no duckweed), 12,5%, 25%, 37,5%, 50%, and 62,5%, respectively. To test the differences between treatment means, the Honestly Significant of Differences (HSD) were used using 5% level of significant. The results of this study show that the effectiveness of lead (Pb) absorption from textile waste water is 59,52% (0,50 mg/L) occured in 4 day at 50% duckweeds coverage, whereas for Zn is 67,57% (0,25 mg/L) occured at 12,5% duckweeds coverage in 4 days.
Key words:Lead (Pb), Zinc (Zn), L. minor L, population densities, absorption
