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| ???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
|---|---|---|
| dc.contributor.advisor | 席行正(Hsing-Cheng Hsi) | |
| dc.contributor.author | Yung-Hua Cheng | en |
| dc.contributor.author | 鄭雍樺 | zh_TW |
| dc.date.accessioned | 2022-11-23T08:58:02Z | - |
| dc.date.available | 2021-11-04 | |
| dc.date.available | 2022-11-23T08:58:02Z | - |
| dc.date.copyright | 2021-11-04 | |
| dc.date.issued | 2021 | |
| dc.date.submitted | 2021-10-29 | |
| dc.identifier.citation | Apitz, S. E., Power, E. A. (2002). From risk assessment to sediment management an international perspective. Journal of Soils and Sediments, 2(2), 61-66. Azcue, J. M., Zeman, A. J., Forstner, U. (1998). International review of application of subaqueous capping techniques for remediation of contaminated sediments. Baker, H. M., Massadeh, A. M., Younes, H. A. (2009). Natural Jordanian zeolite: removal of heavy metal ions from water samples using column and batch methods. Environmental Monitoring and Assessment, 157(1), 319-330. Beckingham, B., Ghosh, U. (2011). Field-scale reduction of PCB bioavailability with activated carbon amendment to river sediments. Environmental Science Technology, 45(24), 10567-10574. Bleiler, J., Gardner, K., Greenwood, S., McCarthy, R., Ruiz, N. (2013). Evaluation of activated-carbon treatment in a PCB-contaminated wetland, in soils/sediments. Paper presented at the Proc 7th Int Conf Remediation of Contaminated Sediments. 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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/79318 | - |
| dc.description.abstract | 近幾十年的工業活動，人類排放了大量的有害物質到自然水體，其中大多排放的重金屬最終會沉澱在底泥之中，然而如遭受到物理擾動或者是環境條件的改變都會造成底泥中的重金屬再釋出，致使底泥成為環境中重金屬的污染源。在經濟及技術方面的考量上，活性覆蓋法是現行底泥整治方法中是較具有可行性的。然而現行的研究缺乏了長時間穩定性及效果的探討，因此本研究透過合成能以磁性回收之材料，用於抑制重金屬釋出，更期望在適當的時間回收覆蓋材，以避免長時間下穩定性及效果不足之疑慮。 本研究首先合成生物炭、硫化生物炭、磁性生物炭以及硫化磁性生物炭四種材料並對其進行物化分析。分析結果顯示磁性炭以及硫化磁性炭的比表面積遠大於其他兩種材料。XRD的結果顯示兩種磁性生物炭皆有Fe3O4的晶相存在，而這也是兩種材料帶有磁性之原因，另外在硫化磁性炭中也發現了FeS之晶相。接著對這四種材料進行水相吸附以及底泥競爭吸附實驗，結果顯示在水相吸附實驗中生物炭以及硫化生物炭對於鉻、銅、鋅的吸附效果是遠大於兩種磁性炭的，而四種材料皆對鎳沒有任何的吸附效果。在底泥競爭吸附實驗當中，相對於控制組生物炭以及硫化生物炭能夠降低液相的鎳、銅、鋅濃度，而兩種磁性生物炭反而會促進底泥中的重金屬釋出。在微型系統的實驗中發現四種生物炭皆能降低水中銅、汞、甲基汞的濃度。只有硫化磁性炭能夠降低水中鎳及鋅的濃度。而所有生物炭對於鉻皆沒有抑制能力。在實驗的後期硫化炭以及磁性炭有一波汞的釋出，磁性炭以及硫化磁性炭也有著一波甲基汞的釋出。實驗的最後對於兩種帶有磁性的生物炭利用磁鐵進行回收，結果顯示在經過三個月的覆蓋後兩種材料仍能有效的被磁鐵吸引回收。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2022-11-23T08:58:02Z (GMT). No. of bitstreams: 1 U0001-2710202113564800.pdf: 3687599 bytes, checksum: 5c612eaca52eb38344b796c74fffa09f (MD5) Previous issue date: 2021 | en |
| dc.description.tableofcontents | "Chapter 1. Introduction 1 1.1 Motivation 1 1.2 Research objectives 2 Chapter 2. Literature review 3 2.1 Heavy metal contamination in sediment 3 2.2 Contaminated sediment remediation approaches and active capping 4 2.2.1 Sediment remediation methods 4 2.2.2 Active capping 5 2.3 Capping materials 8 2.3.1 Capping materials 8 2.3.2 Biochar as a capping material 10 2.3.3 Modified biochar 12 2.4 Factors affecting the metal distribution and the challenges of active capping 13 2.4.1 Factors affecting the metal distribution 13 2.4.2 Challenges 14 Chapter 3. Materials and methods 15 3.1 Experimental design 15 3.2 Analytical instruments, experimental apparatus, and chemical reagents 17 3.3 Sediment sampling, pretreatment, and incubation 19 3.4 Materials synthesis 19 3.4.1 Biochar (B) 19 3.4.2 Sulfurized biochar (SB) 20 3.4.3 Magnetic biochar (MB) 20 3.4.4 Sulfurized magnetic biochar (SMB) 20 3.5 Materials physicochemical analysis 21 3.5.1 Elemental analysis (EA) 21 3.5.2 Specific surface area (SBET) 22 3.5.3 Scanning electron microscope (SEM) 22 3.5.4 Vibrating sample magnetometer (VSM) 22 3.5.5 X-ray photoelectron spectroscopy (XPS) 22 3.5.6 X-Ray Diffractometer (XRD) 23 3.5.7 Zeta potential 23 3.6 Batch adsorption experiment 23 3.7 Sediment competitive adsorption experiment 24 3.8 Magnetism test 25 3.9 Microcosm experiments 25 3.9.1 Sediment incubation 25 3.9.2 Artificial seawater 26 3.9.3 Microcosm design 26 3.9.4 Sampling and water quality measurement 27 3.10 Sample analysis methods 28 Chapter 4. Results and discussion 30 4.1 Sediment incubation and analysis 30 4.2 Materials physicochemical analysis 32 4.2.1 Elemental analysis, specific surface area, and pore volumes 32 4.2.2 SEM-EDS 34 4.2.3 XPS 36 4.2.4 XRD 39 4.2.5 VSM and pH 41 4.3 Adsorption experiments 43 4.3.1 Batch adsorption experiment 43 4.3.2 Sediment competitive adsorption experiment 45 4.4 Microcosm experiment 50 4.4.1 Water quality 50 4.4.2 Metal immobilization 54 4.5 The outlook of the materials 57 4.6 Supporting information 58 Chapter 5. Conclusions and suggestions 68 5.1 Conclusions 68 5.2 Suggestions 69 References 70 " | |
| dc.language.iso | en | |
| dc.title | 利用可磁性回收之綠色覆蓋材料整治多重重金屬污染底泥 | zh_TW |
| dc.title | Using magnetic recoverable green materials for active capping to remediate multiple heavy metal contaminated sediment | en |
| dc.date.schoolyear | 109-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 許正一(Hsin-Tsai Liu),陳勝一(Chih-Yang Tseng),董正釱 | |
| dc.subject.keyword | 活性覆蓋,重金屬,磁性生物炭,底泥整治, | zh_TW |
| dc.subject.keyword | active capping,heavy metal,magnetic biochar,sediment remediation, | en |
| dc.relation.page | 76 | |
| dc.identifier.doi | 10.6342/NTU202104334 | |
| dc.rights.note | 同意授權(全球公開) | |
| dc.date.accepted | 2021-10-30 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 環境工程學研究所 | zh_TW |
| Appears in Collections: | 環境工程學研究所 | |
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|---|---|---|---|
| U0001-2710202113564800.pdf | 3.6 MB | Adobe PDF | View/Open |
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