Ecological Agriculture: Optimization and Validation of Soil Carbon Sequestration Prediction Models【Department of Soil Environmental Sciences / Tzou, Yu-Min / 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】
論文篇名 英文：A mechanistic insight into the shrinkage and swelling of Ca-montmorillonite upon adsorption of chain-like ranitidine in an aqueous system
中文：於水溶液中吸附練狀ranitidine時, 鈣蒙特石之收縮與膨脹機制的審視
期刊名稱 Journal of Colloid and Interface Science
發表年份,卷數,起迄頁數 2023, 633: 979-991
作者 Chang, Po-Hsiang*; Mukhopadhyay, Raj; Chen, Chien-Yen; Sarkar, Binoy; Li, Jiwei; Tzou, Yu-Min(鄒裕民)*
DOI 10.1016/j.jcis.2022.11.104
中文摘要 在水溶液系統中，對ranitidine鹽酸鹽類（RT）在Ca-蒙脫石（SAz-1）上的吸附行為進行批次實驗研究。吸附動力顯示平衡在0.25小時內達到，吸附動力數據與擬二階動力學方程（R2 = 0.98）有很好地擬合。SAz-1的最大RT吸附容量為369.2 mg/g，吸附等溫數據遵循Langmuir模型（R2 = 0.99）。RT的吸附和黏土礦物可交換陽離子的脫附呈線性相關，說明陽離子交換是RT吸附的主要機制。在加熱後對RT吸附的SAz-1樣品（未飽和/飽和）進行XRD檢驗，可以計算出RT在黏土礦物的層間所佔的面積。結果顯示，在低的載荷率下吸附的RT可以自由地位於內部表面，以減小SAz-1的間距（d001值）。當RT載荷率增加時，有限的表面空間迫使更多的RT分子以傾斜的方式排列，引起SAz-1的層間膨脹，增加d001值。隨著RT載荷率的增加，RT的分解溫度上升的趨勢確認了RT分子位於SAz-1中的插層。紅外光譜分析顯示RT的酰胺和呋喃基團參與了RT和SAz-1之間的結合。因此，本研究說明SAz-1是有效的吸附劑，可以從受污染的水中去除RT，而RT的鏈狀分子結構可能會引起膨脹型黏土礦物層間距的不規則變化。
英文摘要 Adsorption behavior of ranitidine hydrochloride (RT) on a Ca-montmorillonite (SAz-1) was studied in aqueous system through batch experiments. The adsorption kinetics revealed that the equilibrium reached within 0.25 h and the data fitted well to the pseudo-second order kinetic equation (R2 = 0.98). The maximum RT adsorption capacity of SAz-1 was 369.2 mg/g and the adsorption isotherm data followed the Langmuir model (R2 = 0.99). The adsorption of RT and desorption of exchangeable cations from the clay mineral were linearly correlated, suggesting that cation exchange was the dominant mechanism of RT adsorption. The XRD examination of RT-adsorbed SAz-1 samples (unsaturated/saturated) after heating enabled the calculation of RT occupied area in the interlayer of the clay mineral. The results suggested that adsorbed-RT at low loading rate could lay on the internal surfaces in a free style to reduce the basal spacing (d001 value) of SAz-1. When the RT loading rate was increased, a limited surface space enforced more RT molecules to lay in a tilted style and caused interlayer swelling of SAz-1 increasing the d001 value. The trend of rising decomposition temperature of RT with increasing RT loading rates confirmed intercalation of RT molecules in SAz-1. Infrared spectral analysis revealed the participation of amide and furan groups of RT in binding between RT and SAz-1. Thus, this study indicated that SAz-1 is an efficient adsorbent to remove RT from contaminated water, and the chain-like molecular structure of RT could cause an irregular change in the basal spacing of swelling type clay minerals.
發表成果與本中心研究主題相關性 黏土礦物(尤其是2:1型的膨潤石)對有機質的固定能力為有機質保存與土壤的最重要因子之一, 本研究藉由了解黏土礦物對長鏈狀的汙染物交互作用後的膨脹收縮行為, 了解膨潤土的吸附機制, 將來可以藉由此研究更清楚的知悉黏土礦物與長鏈狀有機分子的反應, 其是否是長鏈狀有機分子穩定於土壤有機質裡的重要原因。