新穎材料農業：友善環境農業新穎材料研發與安全評估【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：Transformation of sedimentary and colloidal phosphorus across the land‒sea margin received effluents from agricultural and municipal activities 中文：沉積態與膠體磷在接收農業與人為活動放流水之陸地-海洋交界處的轉變 |
| 期刊名稱 | JOURNAL OF CLEANER PRODUCTION |
| 發表年份,卷數,起迄頁數 | 2022, 379, 134686 |
| 作者 | Hsu, Liang-Ching; Tzou, Yu-Min(鄒裕民); Liao, Wen-Han; Teah, Heng Yi; Liu, Yu-Ting(劉雨庭)* |
| DOI | 10.1016/j.jclepro.2022.134686 |
| 中文摘要 | 磷的轉變、傳輸和釋放高度受到人為活動和複雜的生物化學交互作用影響。其生物利用性和溶解度通常受到化學形式的調節，顯現磷化學物種準確識別的急迫性。本實驗利用磷 K 邊緣 X 光吸收近邊緣結構光譜，分析在接收農業和人為活動混合污水區域收集的膠體、渠道底泥和海岸濕地沉積物中的磷分子物種。在農業區附近收集的膠體和底泥中，儘管與三價鐵鍵結的磷[Fe(III)-P]佔多數，但其在膠體中的比例約為底泥中的一半，這表明其他 磷物種，如Al-P、Fe(II)-P 和有機-P (org-P)，對於磷庫存的貢獻漸增。膠體和底泥中 Fe(III)-P 的比例越往海岸濕地越下降，但膠體磷最大損失來自於org-P。有機物降解似乎推動了 SO4 和 Fe(III) 的還原，導致 FeS 的顯著增加，以及使 org-P 轉變成新型態的磷沉澱物。在鄰近濱海濕地膠體磷中，Al-P與Fe(III)-P佔相似比例，反而是Fe(II)-P的比例在從淡水向鹹水過渡區中增幅最大。實驗結果證明了 Fe(II) 和 Al 在膠體和沈積磷中的重要性，應將其考慮在對磷動態和優氧化風險的評估中。 |
| 英文摘要 | The transformation, transport, and release of phosphorus (P) are highly subject to anthropogenic activities and complex biochemical interactions. Its bioavailability and recalcitrance are generally regulated by P forms, arousing imposition for the accurate identification of chemical speciation. Here, P K-edge X-ray absorption near edge structure spectroscopy was exploited to determine the molecular P species on colloids, canal sludge, and coastal sediments collected in the area receiving mixed effluents from agricultural and municipal activities. Although Fe(III)-bonded P [Fe(III)-P] dominated the P inventory for colloids and sludge collected near the agricultural area, its proportion on colloids was approximately half of that on the sludge, suggesting the emerging contribution of other P species such as Al-P, Fe(II)-P, and organic-P (org-P) to carry colloidal P. Proportions of Fe(III)-P on colloids and sludge both declined seaward, yet the maximum P loss from colloids was derived from the org-P. The organic matter degradation plausibly drove the reduction of SO4 and Fe(III), leading to the prominent increase in FeS and the conversion of org-P to authigenic P. While Al-P accounted for a comparable proportion of colloidal P inventory to that of Fe(III)-P in adjacent coastal wetlands, the proportion of Fe(II)-P showed the greatest increase on colloids in the transition from fresh- to saltwater. Collective results attest to the significance of Fe(II) and Al in partitioning colloidal and sedimentary P, which should be taken into account to improve the assessment of the P dynamics and eutrophication risk. |
| 發表成果與本中心研究主題相關性 | 本研究著重在磷從農地到海洋之傳輸，研究結果可幫助評估磷的優養化風險，達到農業與環境之生態平衡。 |
