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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 駱尚廉 | zh_TW |
| dc.contributor.advisor | Shang-Lien Lo | en |
| dc.contributor.author | 傅啟翔 | zh_TW |
| dc.contributor.author | Chi-Hsiang Fu | en |
| dc.date.accessioned | 2023-08-09T16:20:47Z | - |
| dc.date.available | 2023-11-09 | - |
| dc.date.copyright | 2023-08-09 | - |
| dc.date.issued | 2023 | - |
| dc.date.submitted | 2023-07-18 | - |
| dc.identifier.citation | Acosta-Coley, I., & Olivero-Verbel, J. (2015). Microplastic resin pellets on an urban tropical beach in Colombia. Environmental Monitoring and Assessment, 187, 1-14.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/88280 | - |
| dc.description.abstract | 塑膠因成本低、易於加工及良好穩定性，被大量應用於食品包裝與容器產品上，然而當塑膠受到紫外線照射、熱氧化及生物活動等影響，會逐漸風化及降解，進而改變塑膠之物化性質並形成塑膠微粒。這些塑膠微粒可能成為環境污染物的載體，對環境及生態造成衝擊。
本研究探討「聚丙烯 (Polypropylene, PP)」、「低密度聚乙烯 (Low Density Polyethylene, LDPE)」及「高密度聚乙烯 (High Density Polyethylene, HDPE)」三種塑膠微粒的風化結果，實驗中以兩種風化方式比較，包含將塑膠微粒置於戶外，暴露於陽光下自然風化；同時將其置於長弧氙燈照射下加速風化。取樣分析兩種方式對三種塑膠微粒物化性質的影響，以瞭解自然風化與加速風化間的相關性與差異。 實驗結果顯示光氧化與熱氧化導致塑膠表面顏色改變、表面變為粗糙且出現破裂、表面形成官能基、平均粒徑變小、比表面積增加及表面電負性增強，因此形成風化塑膠微粒。三種塑膠微粒中，聚丙烯由於分子鏈存在較多支鏈，易在照射紫外線後發生斷鏈進而氧化，故平均羰基指數較高密度聚乙烯大。此外，加速風化時因溫度較自然風化時高，風化塑膠微粒之傅立葉轉換紅外線光譜的吸收峰值較大，並發生峰值偏移現象，這表明高溫可能促使不同於自然風化的化學反應發生。 本研究另外進行聚丙烯微粒吸附鉛的實驗，結果顯示聚丙烯表面會發生競爭吸附，因此吸附量隨pH值增加而增加，隨鹽度增加而減少。風化塑膠表面會促進鉛的吸附，在酸性環境中，風化聚丙烯微粒之吸附量比原始的增加156%。然而在高pH值時，鉛沉澱作用可能會干擾風化表面官能基的離子錯合，因此於鹼性環境中，風化聚丙烯微粒之吸附量反而降低。原始及風化聚丙烯微粒吸附鉛則較符合Langmuir等溫吸附模式。本研究探討塑膠在環境中的風化機制，並評估塑膠微粒對生態可能造成的危害。 | zh_TW |
| dc.description.abstract | Plastics are widely used in food packaging and container products due to their low cost, good processability, and stability. However, after experienced various weathering and degradation (e.g. UV irradiation, thermal effect, and biological activities), plastics may undergo characteristics changes and break down into microplastics. Microplastics can act as carriers of environmental pollutants, resulting in detrimental effects on the environment and ecosystems.
In this study, three types of microplastics were investigated, including polypropylene (PP), low density polyethylene (LDPE), and high density polyethylene (HDPE). The microplastics were exposed to sunlight outdoors and UV irradiation from a long arc xenon lamp, respectively. Samples were collected and analyzed to evaluate the correlation and differences between the natural weathering and the accelerated weathering. The results indicated that photo-oxidation and thermal-oxidation contributed to the weathering of plastics, leading to changes in surface color, increase in surface roughness, formation of surface functional groups, reduction in mean particle size, increase in specific surface area, and enhancement of surface electronegativity. Among the microplastics, PP was more susceptible to the UV irradiation than HDPE. This might be attributed to the presence of more branches in the molecular chain of PP, making it more prone to chain scission and oxidation. Therefore, the average carbonyl index of PP was higher than that of HDPE. Additionally, due to the higher temperatures during the accelerated weathering than those during the natural weathering, the Fourier-transform infrared spectra of the weathered microplastics exhibited higher peak intensities and peak shifting of adsorption bands. The results indicated that heat might have induced chemical reactions different from those occurred during the natural weathering. Adsorption capacities of Pb on PP microplastics under different conditions were also investigated. The results showed that competitive adsorption of coexisting ions could occur on microplastics. Therefore, the adsorption capacities increased with an increase in pH, but decreased with an increase in salinity. Weathering could promote the adsorption of Pb on microplastics. Under acidic conditions, the adsorption capacities of the weathered PP microplastics increased by 156%, compared to those of the pristine ones. However, lead precipitation would probably interfere the complexation of Pb with the functional groups under alkaline conditions. Therefore, the adsorption capacities of the weathered PP microplastics decreased. Additionally, both pristine and the weathered PP microplastics exhibited a better fit to the Langmuir isotherm than to the Freundlich isotherm. In summary, weathering of plastics and the ecological risks of microplastics were investigated in this study. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-08-09T16:20:47Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2023-08-09T16:20:47Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 口試委員審定書 I
致謝 II 摘要 III 目錄 VI 圖目錄 X 表目錄 XIII 第一章 緒論 1 1.1研究緣起 1 1.2研究目的 2 第二章 文獻回顧 3 2.1聚乙烯 3 2.1.1低密度聚乙烯 3 2.1.2高密度聚乙烯 6 2.2聚丙烯 7 2.3 鉛 9 2.3.1鉛的物化性質 9 2.3.2鉛的污染現況 10 2.4 紫外線 11 2.4.1紫外線輻射 11 2.4.2紫外線指數 12 2.5 塑膠風化及降解機制 13 2.5.1光降解及光氧化 13 2.5.2熱降解及熱氧化 16 2.5.3機械破壞 17 2.5.4微生物黏附及定殖 17 2.6 風化對塑膠的影響 19 2.6.1表面形貌及特性 19 2.6.2表面官能基 20 2.6.3結晶度 20 2.7 吸附 21 2.7.1吸附動力模式 21 2.7.2等溫吸附模式 22 2.7.3塑膠微粒吸附重金屬機制 23 第三章、材料與方法 25 3.1 實驗內容與架構 25 3.2 實驗藥品與設備 26 3.2.1 實驗藥品 26 3.2.2 實驗設備 27 3.3 實驗方法 38 3.3.1前處理 38 3.3.2 塑膠微粒自然風化及特性分析 38 3.3.3 塑膠微粒加速風化及特性分析 38 3.3.4 吸附實驗 39 3.4數據分析 39 3.5品質管制 41 第四章 結果與討論 43 4.1 塑膠微粒自然風化及特性分析 43 4.1.1 風化外觀 43 4.1.2 掃描式電子顯微鏡分析 45 4.1.3 傅立葉轉換紅外線光譜分析 48 4.1.4 示差掃描熱量分析 67 4.2 塑膠微粒加速風化及特性分析 67 4.2.1 風化外觀 67 4.2.2 掃描式電子顯微鏡分析 69 4.2.3 傅立葉轉換紅外線光譜分析 72 4.2.4 示差掃描熱量分析 87 4.2.5 平均粒徑分析 88 4.2.6 比表面積分析 88 4.2.7 界達電位分析 89 4.3 自然風化及加速風化結果比較 90 4.4 動力吸附模式 95 4.4.1 pH值對鉛吸附之影響 95 4.4.2 鹽度對鉛吸附之影響 99 4.5 等溫吸附模式 102 第五章 結論與建議 104 5.1 結論 104 5.2 建議 105 參考資料 106 附錄 116 | - |
| dc.language.iso | zh_TW | - |
| dc.subject | 塑膠微粒 | zh_TW |
| dc.subject | 降解 | zh_TW |
| dc.subject | 風化 | zh_TW |
| dc.subject | 吸附 | zh_TW |
| dc.subject | 重金屬 | zh_TW |
| dc.subject | weathering | en |
| dc.subject | degradation | en |
| dc.subject | adsorption | en |
| dc.subject | microplastics | en |
| dc.subject | heavy metal | en |
| dc.title | 自然風化及加速風化下塑膠微粒的特性變化及重金屬吸附 | zh_TW |
| dc.title | Characteristics Changes and Heavy Metal Adsorption of Microplastics under Natural and Accelerated Weathering | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 111-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 郭繼汾;李育輯 | zh_TW |
| dc.contributor.oralexamcommittee | Jeff Kuo;Yu-Chi Lee | en |
| dc.subject.keyword | 塑膠微粒,風化,降解,吸附,重金屬, | zh_TW |
| dc.subject.keyword | microplastics,weathering,degradation,adsorption,heavy metal, | en |
| dc.relation.page | 119 | - |
| dc.identifier.doi | 10.6342/NTU202301678 | - |
| dc.rights.note | 同意授權(限校園內公開) | - |
| dc.date.accepted | 2023-07-19 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 環境工程學研究所 | - |
| 顯示於系所單位： | 環境工程學研究所 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-111-2.pdf 授權僅限NTU校內IP使用（校園外請利用VPN校外連線服務） | 7.29 MB | Adobe PDF |
系統中的文件，除了特別指名其著作權條款之外，均受到著作權保護，並且保留所有的權利。