Fitranto, Irwan (2024) Phytomining Unsur Vanadium (V) dan Kromium (Cr) Menggunakan Cymbopogon citratus dan Portulaca grandiflora pada Red Mud dengan Variasi Penambahan Kompos dan Spent Bleaching Earth (SBE). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Proses Bayer yang digunakan dalam ekstraksi Vanadium dari bauksit menghasilkan residu yang dikenal sebagai red mud, yang memiliki pH sangat basa dan mengandung logam serta logam berat yang melebihi batas aman, serta beberapa unsur tanah jarang. Kondisi ini menimbulkan masalah lingkungan yang serius, sehingga penelitian ini bertujuan untuk mengeksplorasi potensi phytomining menggunakan tumbuhan Cymbopogon citratus dan Portulaca grandiflora dalam meremediasi dan mengekstrak logam berharga dari red mud. Metodologi penelitian meliputi tahapan persiapan, uji pendahuluan, dan penelitian utama yang dilaksanakan selama 28 hari. Tahapan-tahapan ini mencakup studi literatur, persiapan reaktor dan tumbuhan, serta pengujian red mud dengan ICP-OES, XRD, dan SEMEDX. Tumbuhan yang digunakan, Cymbopogon citratus dan Portulaca grandiflora, dipilih berdasarkan nilai metal tolerance index (MTI) yang tinggi, kemampuan hidup di lingkungan basa dan adaptasi terhadap salinitas yang tinggi, serta efisiensi ekstrasi logam. Red mud yang diuji berasal dari residu pertambangan bauksit di Kalimantan Barat, yang kemudian dikarakterisasi secara fisik dan kimia. Penelitian ini dilakukan dengan dua variabel, yaitu jenis tumbuhan (Cymbopogon citratus dan Portulaca grandiflora) dan penambahan stimulan berupa pupuk kompos dan spent bleaching earth (SBE). Komposisi penambahan pupuk kompos dan SBE ditentukan berdasarkan hasil uji toksisitas setelah dicampur dengan red mud terhadap tanaman. Beberapa parameter uji, seperti V dan Cr, pH, kadar air media, dan electric conductivity (EC) diuji untuk mengetahui pengaruh kedua tumbuhan dengan variasinya. Penambahan kompos dan SBE berpengaruh pada penurunan pH sebanyak 0,44-1,12. Adapun perubahan EC yang terjadi selama 28 hari cenderung meningkat. Penambahan kompos dan SBE memiliki pengaruh terhadap meningkatnya bioavailabilitas logam. Penyerapan logam V tertinggi adalah sebesar 23,3 mg/kg oleh Cymbopogon citratus dengan penambahan kompos sebesar 10% dan red mud 90%. Sedangkan penyerapan logam Cr tertinggi adalah sebesar 18,02 mg/kg oleh Portulaca grandiflora dengan penambahan kompos sebesar 10% dan red mud 90%. Hasil penelitian menunjukkan penambahan kompos 10% meningkatkan kemampuan tumbuhan dalam menyerap logam
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The Bayer process, used in the extraction of aluminum from bauxite, produces a residue known as red mud, which has a highly alkaline pH and contains metals and heavy metals exceeding safe limits, as well as some rare earth elements. This condition poses serious environmental problems, prompting this study to explore the potential of phytomining using the plants Cymbopogon citratus and Portulaca grandiflora to remediate and extract valuable metals from red mud. The research methodology includes preparation stages, preliminary tests, and the main study conducted over 28 days. These stages encompass literature study, preparation of reactors and plants, and testing of red mud using ICP-OES, XRD, and SEM-EDX. The plants used, Cymbopogon citratus and Portulaca grandiflora, were selected based on high metal tolerance index (MTI) values, the ability to thrive in alkaline environments and adapt to high salinity, and metal extraction efficiency. The tested red mud originated from bauxite mining residues in West Kalimantan, which was then characterized physically and chemically. This study was conducted with two variables, namely the type of plant (Cymbopogon citratus and Portulaca grandiflora) and the addition of stimulants in the form of compost and spent bleaching earth (SBE). The composition of the addition of compost and SBE was determined based on toxicity test results after being mixed with red mud towards the plants. Several test parameters, such as V and Cr, pH, water content, and electrical conductivity (EC) are tested to determine the effect of these two plants with the given variations. The addition of compost and SBE stimulants had an impact on the pH reduction that ranged from 0.44 to 1.12. Meanwhile, the change in EC that occurred over 28 days tended to increase. The addition of compost and SBE stimulants had an effect on increasing the bioavailability of metals. The highest V metal absorption was 23.3 mg/kg by Cymbopogon citratus with the addition of 10% compost and 90% red mud. Meanwhile, the highest Cr metal absorption was 18.02 mg/kg by Portulaca grandiflora with the addition of 10% compost and 90% red mud. Adding 10% compost of the total media has resulted the highest amount of metal uptaking by plants
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Cymbopogon citratus, Portulaca grandiflora, V, Cr, Phytomining, Red Mud, Fitoremediasi |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD192.75 Phytoremediation. T Technology > TD Environmental technology. Sanitary engineering > TD878.47 Soil remediation |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25201-(S1) Undergraduate Thesis |
| Depositing User: | Irwan Fitranto |
| Date Deposited: | 31 Jul 2024 05:02 |
| Last Modified: | 31 Jul 2024 05:02 |
| URI: | http://repository.its.ac.id/id/eprint/109519 |
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