- 期刊
污染土地碳匯潛力評估研究
Experimental Study on Carbon Sequestration in Contaminated Sites
摘要
國內污染場址整治期程的長短落差相當大，約計1～20年時間不等，甚至部分場址已超過20年以上仍無法進行整治與活化，這些閒置場址皆具有污染土地碳匯潛力，預估場址總面積約為560萬平方公尺。依據聯合國糧食及農業組織（FAO）研究顯示在亞熱帶濕潤氣候條件地區，污染土地若搭配土壤改良且種植草本植物可以增加額外土壤碳儲量為3.81（tC/ha/y）。有鑑於此，本研究基於國際Verra碳匯評估方法（VM0042），對污染土地碳匯潛力進行模擬，藉由場址土地基本資料與雲端環境數據的蒐集，我們基於場址的土壤、氣候、作物等資料進行了土壤碳含量估算分析。本研究選擇了3個場址作為研究對象，模擬結果顯示在氣候條件較熱地區呈現碳匯效果較差。但總體而言，結果仍顯示國內污染場址可以每年以地上生物質與土壤增匯量的自然為解方路徑下進行，其固碳量數值12.18～12.47 t C/ha/y，若在時間、成本、技術可行性考量下，其可為一項優良負碳技術，也可促進土地循環經濟效益。
並列摘要
The duration of site remediation varies greatly in Taiwan, ranging from approximately 1 to 20 years, with some sites remaining untreated and inactive for over 20 years. These idle sites propose the potential for carbon sequestration studies, with an estimated total area of approximately 5.6 million square meters. According to research by the Food and Agriculture Organization (FAO), in subtropical humid climate conditions, contaminated land combined with soil amendment and planting herbaceous plants can increase additional soil carbon storage by 3.81 (tC/ha/y). This study refers to the international Verra carbon offset assessment method (VM0042), which simulates the carbon sequestration potential of contaminated sites. We collected basic site data and cloud-based environmental data including soil, climate, and crop data. Three sites were selected as the study subjects, and the simulation results showed that carbon sequestration was less effective in hotter climates. Nevertheless, the results indicate that contaminated sites can naturally sequester carbon annually through aboveground biomass and soil storage, ranging from 12.18 to 12.47 t C/ha/y. Considering the time, cost, and technological feasibility, Nature-based solutions in contaminated sites could serve as a promising negative carbon technology and promote the benefits of a land circular economy.