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年度	110	專案性質	實驗性質
專案類別	模場試驗	研究主題	整治
申請機構	國立宜蘭大學	申請系所	環境工程學系
專案主持人	張章堂	職等/職稱	教授
專案中文名稱	利用磁性生物碳球進行農地含砷地下水實場功能測試之研究
中文關鍵字	磁性生物碳、鐵錳改性、三價砷、模廠性能測試
專案英文名稱	Study on the performance test of groundwater model field containing arsenic in agricultural land using magnetic biological carbon ball
英文關鍵字	Magnetic biochar, Modification, Trivalent arsenic, Pilot scale performance assessment
執行金額	1,943,323元
執行期間	2021/1/30 至 2023/12/4
計畫中文摘要	砷是一種類金屬元素，在自然界中廣泛分佈且對人類身體健康存在威脅。生質碳具有來源廣泛、吸附性能優良等特點。為有效降低重金屬對環境危害，乃利用磁性生質碳球複合材料進行地下水中重金屬脫附與回收，以達到資源再利用目的，為驗證本技術實場應用之可行性，已與富立業公司合作，並以嘉義縣某農地進行實場研究，進行農地地下水中含砷重金屬之處理與回收。本研究以木屑為生物質，利用FeCl3· 6H2O和KMnO4對其改性，通過高溫裂解的方法製備出原始生質碳以及具有磁性的鐵改性生質碳及鐵錳改性生質碳。改性後的生質碳材料對溶液中三價砷的去除效果相較於原始生質碳均有明顯的提高。經由XRD、BET、EA及VSM特性分析得知，鐵改性生質碳含有Fe元素，鐵錳改性生質碳含有Fe、Mn元素；改性生質碳均具有磁性，且KMnO4的加入使其磁性增強。通過對吸附時間、投加量、初始pH及初始濃度等吸附性能探究發現，最佳鐵碳品質比為1:1，最佳鐵錳摩爾比為1:2； Fe1C1及Fe1Mn2C1的最佳投加量均為1 g/L；原始生質碳、 Fe1C1吸附三價砷的最佳pH條件為強鹼性，而Fe1Mn2C1為強酸性。針對實場含砷之地下水經過第一道吸附槽，去除效率約為30-38%；經過第二道吸附槽，去除效率約為45-52%；最後經過第三道吸附槽，去除效率約為77-81%，已符合法定地下水標準之砷含量0.5 mg/L。目前研究成果對實場(農地)地下水中含砷重金屬之處理(模廠處理能力約為1.0 m3/day)，可以提供良好基礎研究，以利後續實場相關工作之進行。 關鍵字：磁性生質碳、鐵錳改性、三價砷、模廠性能測試
計畫英文摘要	Arsenic is a kind of metal elements, widely distributed in nature. Many technologies, including adsorption, ion exchange, membrane separation and extraction, have been developed to treat arsenic-containing wastewater due to a series of drinking water safety problems caused by arsenic pollution. Biochar has some advantages of big surface area, low cost and so on. In order to effectively reduce the environmental hazards of heavy metals, an attempt was made to use the acid extraction process to desorb and recover the heavy metals adsorbed on the magnetic bio-carbon ball composite material. In order to verify the feasibility of the field application of this technology in the farm, it has been executed to assess the As removal performance from underground water in field study by cooperating with Fuliye Company in Chiayi. In our study, wood was used as biomass and FeCl3·6H2O and KMnO4 were also used to promote the performance of arsenic removal. The results of XRD, BET, EA and VSM analysis show that modified biochar has major elements of Fe, Mn with KMnO4. The modified biochar, Fe1Mn2C1, has higher magnetism of 40 emu g-1. Through adsorption performance assessment, the best ratio of Fe/C is 1:1 and the adsorption efficiency and capacity of Fe1C1 is 61.6% and 0.681 mg g-1, respectively. Then, the best ratio of Mn, Fe and C is 4:1:1 with highest adsorption efficiency of 80.8% and capacity of 0.724 mg g-1. The best dosage of Fe1C1 and Fe1Mn2C1 is the same as 1 g L-1. It shows better adsorption capacity under higher pH with PB and Fe1C1while under lower pH with Fe1Mn2C1. It is feasible to remove the As from underground water in field study due to the high performance of prepared magnetic bio-carbon ball composite material in laboratory. The removal efficiency is ranged from 30 to 38 %, 45-52% and 77-81% with only one, two and three adsorption reactors, respectively. It also fits the standard water quality about As concentration of 0.5 mg/L. It also looks forward to using this technique to control the As in farm with assessing the performance of As removal in pilot scale plant. Keywords: magnetic biochar, iron-manganese modification, trivalent arsenic, pilot performance test