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https://ptsldigital.ukm.my/jspui/handle/123456789/463357Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Mohamed Rozali Othman, Prof. Dr. | |
| dc.contributor.author | Zainab Haider Mussa (P69014) | |
| dc.date.accessioned | 2023-09-25T09:23:03Z | - |
| dc.date.available | 2023-09-25T09:23:03Z | - |
| dc.date.issued | 2015-04-24 | |
| dc.identifier.other | ukmvital:77030 | |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/463357 | - |
| dc.description | Leachate released by domestic landfill contains large quantities of non-biodegradable and toxic constituents including organic and inorganic substances. Chemical oxygen demand (COD), color, ammonical nitrogen (NH3-N) can efficiently represent these groups of pollutants and pharmaceutical products, which are compounds used to treat various diseases for human or animals. Hence, landfill leachate should be treated before discharged into the environment. This study investigated the efficiency of electrochemical oxidation technique in removing chemical oxygen demand (COD), ammonia nitrogen (NH3-N) and color from raw landfill leachate and some detected pharmaceutical compounds in the leachate after the biological and the physico-chemical treatments from Jeram landfill leachate using graphite-PVC composite and Pt electrodes as anode and cathode respectively in the presence of NaCl as a supporting electrolyte in a batch electrochemical reactor. The preparation of a new carbon composite electrode, constructed from polyvinyl chloride-graphite (PVC-graphite) composite was used first to treat landfill leachate in Malaysia under electrochemical oxidation process. The effects of operational parameters including graphite-PVC ratio, applied voltage, Cl− concentration and pH of the landfill leachate treatment efficiency were studies. The highest COD, NH3-N and color removals achieved were 87%, 61% and 97% respectively, at pH 3, 0.58% (w/v) NaCl concentration, 15 V applied voltage and 105 min electrolysis time. During the process, the current was measured in order to evaluate energy consumption and current efficiency. The existing of two pharmaceuticals namely prazosin and simvastatin in biological and physico-chemical treated leachate was investigated using solid phase extraction (SPE) followed by HPLC coupled with a high resolution time of flight mass spectrometer LC-TOF/MS. The treatment of pharmaceutical products was achieved after optimization several parameters such as initial concentration of pharmaceutical, applied voltage and NaCl concentration. The removal of prazosin and simvastatin was 99% and 100% respectively at 0.58% w/v NaCl, 30 min of electrolysis time and 15 V of applied voltage. The good fitting of data to the pseudo-first-order kinetics for COD and prazosin removal was achieved. The rate constant was 0.0166 min−1 and 0.1303 min−1 for COD and prazosin, respectively at 15 V applied voltage. For more confirmation of electrochemical oxidation, the Scanning Electron Microscopy (SEM) has been used to evaluate the surface of PVC-graphite electrode before and after treatment. The results indicated that the electrochemical oxidation with graphite-PVC anode is an effective process for the treatment of landfill leachate and pharmaceuticals. In addition the PVC-graphite composite exhibits favorable qualities as an electrode material, with respect to its mechanical resistance, very low cost,simple preparation and easy renewal of the electrode surface.,Master/Sarjana | |
| dc.language.iso | eng | |
| dc.publisher | UKM, Bangi | |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
| dc.rights | UKM | |
| dc.subject | Electrochemical | |
| dc.title | Electrochemical treatment of leachate using graphite-polyvinyl chloride composite electrode | |
| dc.type | theses | |
| dc.format.pages | 98 | |
| dc.identifier.barcode | 001422 | |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_77030+SOURCE1+SOURCE1.0.PDF Restricted Access | 2.87 MB | Adobe PDF |  View/Open |
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