生態農業：土壤碳蓄存之預測模型優化及驗證【土壤環境科學系/鄒裕民特聘教授、劉雨庭特聘教授】
| 論文篇名 | 英文：Efficient ethidium bromide removal using sodium alginate/graphene oxide composite beads: Insights into adsorption mechanisms and performance 中文：利用海藻酸钠/氧化石墨烯複合珠有效的去除溴化乙锭：吸附機制與表現的深入探討 |
| 期刊名稱 | Chemical Engineering Journal |
| 發表年份,卷數,起迄頁數 | 2024, 500, no.156379 |
| 作者 | Chang, Po-Hsiang; Yang, Yating; Wen, Yaqi; Ahmed, M.M.M.; Chang, Jou-Chieh; Chang, Ting-Yu; Tzou, Yu-Min(鄒裕民)*; Li, Zhaohui; Osman, Ahmed I. |
| DOI | 10.1016/j.cej.2024.156379 |
| 中文摘要 | 本研究探討海藻酸鈉/氧化石墨烯 (SA/GO) 複合珠在水溶液中去除溴化乙锭 (EtBr) 的有效性。透過合成 GO 並與 SA 交聯設計出複合珠，並在各種物理化學條件下進行吸附效率評估。採用了場發射掃描電子顯微鏡 (FESEM)、熱重分析 (TGA)、X射線繞射 (XRD) 和傅立葉變換紅外光譜 (FTIR) 等光譜技術來分析複合珠在吸附 EtBr 前後的變化。結果顯示 SA/GO 複合珠對 EtBr 的吸附非常迅速，符合 Freundlich 等溫模型，最大吸附容量為 2.97 mmol g−1 (1171.05 mg g−1)。溶液 pH 值的影響以及 Br− 離子作用的顯示，靜電相互作用是 SA/GO 吸附 EtBr 的主要機制。XRD 和 FTIR 分析發現，EtBr 吸附發生在 SA/GO 複合珠的層間空隙中，乙锭陽離子 (Et+) 以水平或傾斜（≥45°）的方式進入該空隙，估計 Et+ 在層間空隙中堆積形成 1–6 個基本傾斜層。SA/GO 複合珠展現出對 EtBr 污染整治的良好特性，包括環境影響低、成本效益高、吸附動力快以及高去除效率。本研究為 SA/GO 複合珠的吸附機制和性能提供了寶貴見解，並強調其在未來 EtBr 污染環境復育領域應用的潛力。 |
| 英文摘要 | This study explores the efficacy of sodium alginate/graphene oxide (SA/GO) composite beads for ethidium bromide (EtBr) removal from aqueous solutions. GO was synthesized and crosslinked with SA to design composite beads, which were evaluated under various physicochemical conditions. Characterization techniques, including FESEM, TGA, XRD, and FTIR, were employed to analyze the beads before and after EtBr adsorption. Results demonstrated rapid EtBr adsorption onto SA/GO, following the Freundlich isotherm model with a maximum adsorption capacity of 2.97 mmol g−1 (1171.05 mg g−1). The influence of solution pH and the negligible role of Br− ions suggested that electrostatic interaction was the primary mechanism for EtBr adsorption on SA/GO. XRD and FTIR analyses revealed that EtBr adsorption also occurred in the interlayer space of SA/GO beads, with the ethidium cations (Et+) entering this space in a horizontal or oblique (≥45°) orientation. The accumulation of Et+ within the interlayer space was estimated to form 1–6 basic inclined layers. SA/GO beads demonstrated promising characteristics for EtBr pollutant treatment, including low environmental impact, cost-effectiveness, rapid adsorption kinetics, and high removal efficiency. This study provides valuable insights into the adsorption mechanisms and performance of SA/GO beads, highlighting their potential for future field applications in the environmental remediation of EtBr contamination. |
| 發表成果與本中心研究主題相關性 | 海藻酸鈉為天然無毒的材料, 氧化石墨烯則在不同領域有非常大的應用價值, 本研究將天然與可以人工簡易合成的材料來製備生物複合材料, 使其可以快速地將目標汙染物溴化乙锭 (EtBr)從水溶液中快速有效的移除, 本研究成果可擴大應用於其他帶電性有機汙染物的去除, 有助於研究中心拓展在環境與永續研究領域的廣度。 |
