【學術亮點】Sulfur-functionalized rice straw biochar for enhanced cadmium sorption: Spectroscopic, kinetic and computational insights
Ecological Agriculture: Optimization and Validation of Soil Carbon Sequestration Prediction Models【Department of Soil Environmental Sciences / Tzou, Yu-Min / Distinguished Professor、Liu, Yu-Ting / Distinguished Professor】
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：Sulfur-functionalized rice straw biochar for enhanced cadmium sorption: Spectroscopic, kinetic and computational insights 中文：以硫官能化稻稈生物炭增強鎘吸附能力之研究：光譜分析、動力學與計算模擬的深入探討 |
| 期刊名稱 | Journal of Cleaner Production |
| 發表年份,卷數,起迄頁數 | 2024, 484, no.144267 |
| 作者 | Ahmed, M. M. M.; Liao, Chih-Hao; Liu, Yu-Ting(劉雨庭); Venkatesan, S.; Hsieh, Yi-Chen; Nail, H. M.; Wang, Hui-Min David; Lin, Ming-Chang; Jien, Shih-Hao; Tzou, Yu-min(鄒裕民)* |
| DOI | 10.1016/j.jclepro.2024.144267 |
| 中文摘要 | 鎘（Cd）污染亟需有效的修復方法。本研究透過硫官能化的方式提升稻稈生物炭對鎘的吸附能力，實現生物炭的高值化應用。研究中使用 H₂SO₄、Na₂S 與 Na₂S₂O₃ 等含硫化合物對生物炭進行改質，引入 路易斯軟鹼（Lewis soft base） 性質，以增強其對 路易斯軟酸（Lewis soft acid）Cd(II) 的親和力。 表徵結果顯示，硫基團成功接枝至生物炭表面，使硫含量由 0.33% 提升至 13.27%，同時增加了含氧官能基的數量。與原始生物炭相比，硫官能化生物炭的 Cd(II) 吸附性能顯著提升：在 pH 5.0 時的最大吸附量達 34.40 mg g⁻¹，為原始樣品的 17.3 倍，且平衡時間從 8 小時縮短至 5–10 分鐘。 密度泛函理論（DFT）計算顯示，硫摻雜可促進 Cd–S 鍵的形成，並調控生物炭–鎘系統的電子性質，進一步提升吸附效能。整體而言，硫官能化為一種具成本效益且環境友善的 Cd(II) 去除技術，其優越性能已由實驗與理論雙重驗證。 |
| 英文摘要 | Cadmium (Cd) contamination necessitates effective remediation approaches. This study valorizes rice straw biochar by enhancing its Cd sorption capacity through sulfur functionalization. Biochar was functionalized with sulfur compounds (H2SO4, Na2S, and Na2S2O3) to introduce Lewis soft base characteristics for improved affinity towards Cd(II), a Lewis soft acid. Characterization confirmed successful grafting of various sulfur groups, increasing the sulfur content from 0.33% to 13.27% and boosting oxygen-containing functional groups. The sulfur-functionalized biochar demonstrated significantly enhanced Cd(II) sorption compared to pristine biochar, with a maximum capacity of 34.40 mg g-1 at pH 5.0 – a 17.3-fold increase – and reduced equilibrium time from 8 h to 5–10 min. Density functional theory calculations suggested that sulfur doping facilitated Cd-S bond formation and modulated the electronic properties of the biochar-Cd systems, contributing to the superior sorption performance. Sulfur functionalization offers a cost-effective, eco-friendly method for enhanced Cd(II) removal, validated by experiments and theory. |
| 發表成果與本中心研究主題相關性 | 本研究以農業廢棄物稻稈為原料製備生物炭，並透過硫官能化提升其對鎘離子的吸附能力，兼具廢棄物再利用與污染治理雙重效益。此技術有效去除水體中具毒性的重金屬鎘，促進土壤與水資源的永續管理，符合聯合國永續發展目標（SDGs）中「潔淨水與衛生」（目標6）及「負責任的消費與生產」（目標12）。同時，透過低成本、環境友善的改質方法，展現綠色化學與循環經濟理念，為永續環境修復提供具實際應用潛力的解決方案。 |
