2023-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/694762規劃與推展循環經濟以減少資源耗損與廢棄物產量為近年熱點議題，將有機廢污製備生質炭以減少廢污產生及增加循環經濟效率，逐漸被環境研究部門重視，此項技術的發展對降低氣候變遷的環境衝擊，創造對生態系統友善的循環經濟模式，改善環境的永續性，及開創生質能應用事業等，均有甚大的機會。本計畫主題為: CO2奈米氣泡與生質炭應用於都市碳匯之強化與土壤改良，利用回收的CO2經由奈米氣泡(nanobubble, NBs)產生器以增加在水溶液中的持久與穩定性，產生活性氧物種(reactive oxygen species, ROS)，例如氫氧自由基(hydroxyl radicals, •OH)，改良土壤性質;配合校園有機廢污製備的生質炭，以加速種子發芽與植物生長、改善土壤鹼度、降低重金屬在土壤中之移動性，及增加光合效應與碳匯。 There is a growing interest in developing “circular economy” with the major goal of eliminating waste by appropriate planning. Biochar has recently gained popularity in the environmental sector as a versatile material for waste reduction and increasing the efficacy of the circular economy. It has demonstrated possibilities towards reducing environmental impact, battling climate change, and creating an efficient circular economy (CE) model. Although it can potentially improve the environment’s sustainability, agriculture and generate a bioenergy-based business, people will be unwilling to spend on it until its specific impacts on soil features and yields can be demonstrated well. CO2 in nanobubble (NBs) aqueous and waste derived biochar forms can thereby act as an opportunity to alleviate worst consequences of climate change by actively removing CO2 and wastes from atmosphere and recirculating them for sustainable growth of plants. Integrated use of CO2 NBs and biochar will help towards boosting urban carbon sink and soil reclamation in forms of sustainable farming practices and prevent food insecurity. NBs have attracted increasing attention in agriculture due to their intriguing properties, including high stability, improved gas solubility, generation of reactive oxygen species (ROS) like hydroxyl radicals (•OH), which can affect soil quality, plant growth, and seed germination. Due to their relatively high zeta potentials and colloidal stability in liquid, NBs can remain stable in water for weeks to months. Meanwhile, biochar’s with a porous structure and large internal surfaces can promote plant growth by minimizing abiotic impact factors, such as drought by improving water holding capacity or nutrient preservation by increasing cation exchange capacity. Additionally, biochars and CNBs may also decrease the amount of heavy metals and other phytotoxic compounds in soil, with the potential for long-term effects on soil chemistry.