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： Insight and mechanisms of tetracycline adsorption on sodium alginate/ montmorillonite composite beads
中文：鈉藻酸鈉/蒙脫石複合珠對四環黴素吸附的洞悉和機制
期刊名稱 Applied Clay Science
發表年份,卷數,起迄頁數 2023, 245: 107127
作者 Chang, Po-Hsiang; Mukhopadhyay, Raj; Sarkar, Binoy; Mei, Yun-Cheng; Hsu, Chih-Hsun; Tzou, Yu-Min(鄒裕民)*
DOI 10.1016/j.clay.2023.107127
中文摘要 存在土壤和水中的抗生素會造成巨大的健康隱憂，因為它們可能會增加有害的抗生素及耐藥性細菌的發展。在本研究中，以蒙脫石（Mt）和鈉藻酸鈉（SA）2:1或1:1比例制備的複合珠，用於吸附四環黴素盐酸鹽（TC），其為一種常見於水系統中的抗生素。TC吸附到Mt/SA上的平衡時間為8小時，動力學數據可以拟二階模型模擬。吸附等溫可以Langmuir方程式描述。TC吸附的最大量分別為2:1-Mt/SA、1:1-Mt/SA和原始Mt的745、689和445毫克/克。Mt/SA複合珠具有多孔結構，然而，這並未像先前報導在TC去除中起關鍵作用。陽離子交換是主要的吸附機制，SA和TC之間的靜電吸引力和氫鍵作用也有助於Mt/SA複合珠上的TC吸附。此外，少量TC移動到珠內部空間，導致TC插層到Mt層間，增強了Mt/SA複合珠對TC的吸附。
英文摘要 The presence of antibiotics in soil and water raises great health concerns because they may increase the development of harmful antibiotic-resistant bacteria. In this study, composite beads prepared from 2:1 or 1:1 ratios of montmorillonite (Mt) and sodium alginate (SA) were used to adsorb tetracycline hydrochloride (TC), an antibiotic commonly found in aqueous systems. The equilibrium time for TC adsorption onto the Mt/SA was 8 h, and the kinetic data were consistent with the pseudo-second-order model. The adsorption isotherm was described with the Langmuir equation. The maximum amounts of TC adsorbed were 745, 689, and 445 mg g1 for the 2:1- and 1:1-Mt/SA and the original Mt, respectively. The Mt/SA composite beads exhibited porous structures; however, this did not play a key role in TC removal, as previously reported. Cation exchange was the major adsorption mechanism, and electrostatic attraction and hydrogen bonding between the SA and TC also contributed to TC adsorption on the Mt/SA composite beads. In addition, the migration of a small amount of TC into the inner spaces of the beads led to the intercalation of the TC in the Mt interlayers and enhanced TC adsorption by the Mt/SA composite beads.
發表成果與本中心研究主題相關性 黏土礦物如本篇使用的蒙脫石對有機及無機毒性汙染物具有很高的去除能力, 而若將其與其他有機材料(如海藻酸鈉)結合, 其去除有機汙染物的能力更高, 本研究顯示此增進的去除有機汙染物的能力取決於離子交換反應, 而非與構造有關的多孔結構, 本研究將來可以做為吸附有機碳研究的基礎,  了解有機碳與黏土礦物是以哪種結合機制作用,  而可以避免微生物的分解而長期保留與土壤中 。