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年度	112	專案性質	實驗性質
專案類別	研究專案	研究主題	整治
申請機構	國立台灣大學	申請系所	農業化學系
專案主持人	施養信	職等/職稱	教授
專案中文名稱	研發以碳化農業剩餘物整治多溴二苯醚高濃度污染場址土壤之綠色技術及評估其增加土壤碳匯之效益
中文關鍵字	碳化農餘物, 生物炭, 多溴二苯醚, 吸附, 植物吸收, 淨零減, 土壤碳增匯
專案英文名稱	Agricultural residues biochars reduce the ecological risk of PBDE and promote carbon sequestration in PBDE-contaminated soil
英文關鍵字	Polybrominated diphenyl ethers, agricultural residues, biochars, PBDE pollution, carbon sequestration
執行金額	1,070,000元
執行期間	2023/12/1 至 2024/11/30
計畫中文摘要	多溴二苯醚（Polybrominated diphenyl ethers, PBDEs）是一種常見且有害的阻燃劑，已被列為持久性有機污染物。不僅污染環境，還可能通過食物鏈進入人體，對健康造成威脅。為了解決土壤中的PBDEs污染問題，我們團隊計畫利用碳化農餘物（生物碳）來吸附這些污染物。這個方法不僅能有效淨化土壤，還能達到儲碳的效果，是一項具有潛力的環境整治策略。 本研究比較了稻稈、木材和稻殼三種生物碳添加對土壤的影響，三種生物碳的添加對於土壤酸鹼值與氧化電位影響不大。半年的監測結果顯示，生物碳在土壤中的分解速率相對緩慢，其中木材、稻稈和稻殼生物碳的分解速率常數分別為0.0058、0.0044和0.0062 day-1，三種生物碳添加的土壤則是分別增加了10.8, 14.0及10.0 t/ha 的碳含量，生物碳添加可能會增加土壤碳匯量，但仍需後續監測。盆栽實驗則進一步證實，木材與稻稈生物碳的添加能有效降低植物體內多溴二苯醚的濃度，5%w/w的添加能夠減少40%的吸收。甚至僅添加1%w/w也能夠減少32%的吸收。另外，5%w/w生物碳的添加亦能夠使土壤碳匯至目前增加35~43 t/ha，也需後續繼續監測。
計畫英文摘要	Polybrominated diphenyl ethers (PBDEs), a common and harmful flame retardant, have been classified as persistent organic pollutants. These substances not only pollute the environment but also pose a threat to human health through the food chain. To address the issue of PBDEs contamination in soil, our team plans to utilize carbonized agricultural residues (biochar) to adsorb these pollutants. This approach not only effectively cleans up soil but also achieves carbon reduction, making it a promising environmental remediation strategy. This study compared the effect of amending soil with three types of biochar: rice straw, wood, and rice husk. The addition of these biochars had a minimal impact on soil pH and redox potential. After a six-month monitoring period, the decomposition rates of biochar in soil were relatively slow, with decomposition rate constants of 0.0058, 0.0044, and 0.0062 day-1 for wood, rice straw, and rice husk biochar, respectively. Soils amended with these biochars showed increases in carbon content of 10.8, 14.0, and 10.0 t/ha, respectively, providing strong evidence for the potential enhancement of soil carbon sequestration through biochar application although a long-term monitoring is still needed. Pot experiments further confirmed that amending soil with wood and rice straw biochar effectively reduced PBDE concentrations in plants. A 5% w/w application reduced plant uptake of PBDE by 40%, while even a 1% w/w application reduced uptake by 32%. Additionally, a 5% w/w application of biochar increased soil carbon sequestration by 35~ 43 t/ha, although further monitoring is needed.