Nisa, Anis Khoirun (2019) Fraksi Geokimia Logam Cu dan Zn pada Sedimen Perairan sebagai Indikator Ketersediaan Logam Berat di Badan Air. Magister thesis, Universitas Brawijaya.
Abstract
Sedimen perairan dapat berperan sebagai tempat penyimpanan bagi logam berat, karena kapasitasnya yang besar dalam memasukkan dan mengakumulasi logam berat pada sistem perairan. Logam Cu dan Zn merupakan logam berat esensial dan termasuk dalam nutrisi mikro yang dibutuhkan pada proses metabolisme dalam takaran konsentrasi yang rendah. Konsentrasi Cu dan Zn yang melebihi batas baku mutu dapat berpotensi tinggi sebagai racun bagi tumbuhan pada tingkat toksisitas sedang hingga tinggi. Logam Cu dan Zn dapat masuk ke dalam sedimen perairan melalui proses alami atau antropogenik, seperti pelapukan tanah dan batuan, atau kegiatan domestik di sekitar badan air. Remobilisasi logam berat dari sedimen ke badan air berperan dalam meningkatkan konsentrasi logam berat di badan air. Evaluasi kontaminasi logam berat di badan air yang hanya didasarkan pada pengukuran sesaat konsentrasi logam berat di badan air bersifat fluktuatif. Oleh karena itu, untuk mengevaluasi kontaminasi logam berat di badan air dalam jangka panjang perlu menentukan peran sedimen perairan dalam remobilisasi logam berat Distribusi fraksi geokimia logam berat dalam sedimen serta remobilisasinya dari sedimen ke badan air dipengaruhi oleh sifat fisika kimia sedimen, seperti pH, potensial redoks, kapasitas tukar kation (KTK), kandungan bahan organik, dan ukuran partikel sedimen. Tujuan dari penelitian ini adalah untuk mengevaluasi potensi sedimen perairan sebagai indikator ketersediaan logam berat Cu dan Zn di badan air. Masalah yang dipelajari dalam penelitian ini adalah sifat fisika kimia sedimen perairan, distribusi fraksi geokimia Cu dan Zn dalam sedimen, korelasi sifat fisika kimia yang berpotensi besar dalam remobilisasi Cu dan Zn dari sedimen ke badan air, dan nilai RAC sedimen. Sampel sedimen diambil dari lima lokasi sampling yang terletak di Sumber Nyolo, Karangploso. Penentuan sifat fisika kimia sedimen, seperti pH, potensial redoks, ukuran partikel, kapasitas tukar kation (KTK), dan bahan organik menggunakan prosedur analisa dari Balai Penelitian Tanah. Proses ekstraksi fraksi geokimia Zn dan Cu dilakukan menggunakan metode ekstraksi BCR termodifikasi (Bureau Community of Reference plus residual fraction). Konsentrasi logam dalam setiap fraksi ektraksi dianalisis menggunakan AAS. Korelasi sifat fisika kimia sedimen terhadap konsentrasi fraksi Cu dan Zn dalam sedimen dianalisis dengan metode korelasi Pearson dengan SPSS 16.0. Potensi sedimen sebagai sumber logam berat di badan air dapat ditentukan melalui nilai Risk Assessment Code (RAC)
English Abstract
quatic sediments can act as a sink and source for heavy metals, because of their large capacity in entering and accumulating heavy metals in aquatic systems. Cu and Zn are essential metals and are included in micronutrients that are needed for plant growth and development in low concentrations. The exceeds of concentration of Cu and Zn can have high potential as poison for plants at moderate to high levels of toxicity. Cu and Zn metals can enter into water sediments through natural or anthropogenic processes, such as soil and rock weathering, or domestic activities around water bodies. The interaction of metal ions with sediment components influences the availability of heavy metals in the sediment and the ability to remobilize the metal to water bodies. The presence and speciation of heavy metals in sediments are influenced by the physical-chemical properties of sediments, such as pH, redox potential, cation exchange capacity (CEC), organic matter content, and the size of sediment particles. Water sediments have the potential as a source of Cu and Zn metal contamination in water bodies. The potential of sediments as a source of heavy metal contamination in water bodies can be determined through the Risk Assessment Code (RAC) value. Determination of the quality of water bodies based on information on the physical-chemical properties of water bodies is fluctuative, thus the level of contamination cannot be predicted in the long-term. By determining of the physical chemistry of aquatic sediments, the distribution of heavy metal fractions in sediments, the correlation of chemical and physical properties that have great potential in the remobilization of heavy metal geochemical fractions, and potential sediment risk, aquatic sediments can be used as indicators of the availability of heavy metals in water bodies in long-term period. The purpose of this study is to evaluate the potential of water sediments in Nyolo Source as an indicator of the availability of heavy metals in water bodies. Sediment samples were taken from five sampling locations located in Sumber Nyolo, Karangploso. Determination of the physical-chemical properties of sediments, such as pH, redox potential, particle size, cation exchange capacity (CEC), and organic materials using the analytical procedure of the Soil Research Center. The zinc and copper metal extraction process uses the modified BCR extraction method (Bureau Community of Reference plus residual fraction). Determination of metal concentration in each extraction fraction was analyzed using AAS. Determination of the relationship between the physical and chemical xi properties of sediments with zinc and copper metal concentrations in each fraction was analyzed by the Pearson correlation method with SPSS 16.0.
Other obstract
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| Item Type: | Thesis (Magister) |
|---|---|
| Identification Number: | TES/363.739 4/NIS/f/2019/041901467 |
| Uncontrolled Keywords: | Fraksi Geokimia Logam Cu dan Zn, edimen Perairan, indikator Ketersediaan Logam Berat |
| Subjects: | 300 Social sciences > 363 Other social problems and services > 363.7 Environmental problems > 363.73 Pollution > 363.739 Pollution of specific environments > 363.739 4 Water pollution |
| Divisions: | S2/S3 > Magister Kimia, Fakultas MIPA |
| Depositing User: | Endang Susworini |
| Date Deposited: | 12 Jul 2022 04:58 |
| Last Modified: | 12 Jul 2022 04:58 |
| URI: | http://repository.ub.ac.id/id/eprint/191937 |
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