Agustina, Fatmawati (2018) Proses oksidasi elektrokimia pada lindi menggunakan anoda Boron-Doped Diamond (BDD) dengan penambahan ion klorida dan sulfat = Electrochemical oxidation process of landfill leachate using boron-doped diamond anodes with chloride and sulfate ion addition. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Oksidasi elektrokimia merupakan pengolahan fisik-kimia yang efektif untuk menyisihkan polutan organik dan ammonia pada lindi. Faktor-faktor yang berpengaruh pada proses ini antara lain jenis elektroda, pH awal proses dan penambahan elektrolit. Anoda Boron-Doped Diamond memiliki potensi oksidasi yang sangat tinggi. Anoda ini dapat mengaktivasi ion-ion di dalam lindi menjadi senyawa radikal seperti: klorida (Cl•, Cl2•-), karbonat (CO3•-), fosfat (H2PO4•, PO4•2-) dan sulfat (SO4•-) yang dapat meningkatkan laju oksidasi. Tujuan dari penelitian ini adalah untuk menganalisis pengaruh pH awal proses serta pengaruh penambahan ion Cl- dan SO42- terhadap efisiensi proses oksidasi elektrokimia pada lindi menggunakan anoda Boron-Doped Diamond. Efisiensi dari proses ini dinilai berdasarkan tingkat penyisihan COD, ammonium dan konsumsi energi spesifik.
Penelitian ini dilakukan dalam skala laboratorium menggunakan reaktor elektrokimia yang terbuat dari akrilik dengan volume efektif 80 mL. Elektroda yang digunakan adalah anoda boron-doped diamond dan katoda silver dengan luas masing-masing 2 cm x 4 cm dan jarak antar elektroda 20 mm. Total lindi yang diolah adalah 1 L dengan sistem batch recirculation selama 7 jam dengan debit aliran 2 mL/detik. Variasi pH awal proses yang digunakan adalah pH 3, pH 5 dan pH asli lindi. Variasi penambahan elektrolit adalah penambahan NaCl, Na2SO4, dan NaCl+Na2SO4. Variasi pH awal proses adalah pH 3, pH 5 dan pH asli lindi. Parameter yang dianalisis meliputi COD, Cl-, SO42-, Ammonium, pH dan TDS, BOD5, TOC dan total klorin.
Hasil menunjukkan bahwa proses penyisihan COD dan ammonium paling tinggi dicapai pada saat penambahan 0,025 M NaCl+0,025 M Na2SO4 pada pH asli lindi, yaitu 0,7291 g COD (0,0208 g Wh-1) dan 0,215 g Ammonium (0,006 g Wh-1 NH4+).
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Electrochemical oxidation is one of effective physico-chemical methods applied to remove organic pollutant and ammonia in landfill leachate wastewater. The efficiency of electrooxidation depends on various parameters such as current density, pH, chloride concentration, type and concentration of electrolyte used during the process. Boron-Doped Diamond is characterised as one of high potential oxidation anodes. Recent studies indicate that BDDs are capable of generating radical species such as chloride (Cl•, Cl2•-), carbonate (CO3•-), phosphate (H2PO4•, PO4•2-) and sulfate (SO4•-) which can increase the oxidation rates of organic pollutants. The present study evaluated the influence of pH operation and the difference role of sulfate and chloride ion in electrochemical oxidation process using BDD anode.
A laboratory-scale electrochemical reactor was design with effective volume 80 mL. Boron-Doped Diamond was used as anode and silver was used as cathode with each surface area of 8 cm2 and electrode gap of 20 mm. 1 L landfill leachate was pumped into reactor and recirculated for 7 hours at a flow rate of 2 mL s-1. The constant applied current density during electrochemical process was 75 mA cm-2. The variation of electrolyte addition in this study was 0.05 M NaCl; 0.05 M Na2SO4, and 0.025 M NaCl+ 0.025 M Na2SO4. pH varied as unadjusted, adjusted to 3 and 5 in the beginning of each variation. Main parameters analyzed were including COD, Cl-, SO42-, Ammonium, pH, TDS, BOD5, TOC and Total Chlorine.
The results show the best removal efficiency of COD and ammonia were obtained with addition of 0,025 M NaCl+0,025 M at pH 8,5 (original pH of leachate), that was 0,7291 g COD (0,0208 g Wh-1) and 0,215 g Ammonium (0,006 g Wh-1 NH4+).
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSL 628.42 Agu p-1 3100018075847 |
| Uncontrolled Keywords: | Electrochemical Oxidation, leachate, boron-doped diamond anode, chloride ion, sulfate ion, Oksidasi elektrokimia, lindi, boron-doped diamond, ion klorida, ion sulfat |
| Subjects: | Q Science > QD Chemistry > QD115 Electrochemical analysis T Technology > TD Environmental technology. Sanitary engineering > TD433 Water treatment plants |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Environmental Engineering > 25201-(S1) Undergraduate Theses |
| Depositing User: | Fatmawati Agustina |
| Date Deposited: | 08 Jan 2019 04:42 |
| Last Modified: | 15 Oct 2020 07:02 |
| URI: | http://repository.its.ac.id/id/eprint/53427 |
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