Considering Fukushima’s contaminated water treatment system using algae ~ To protect the oceans from radioactive emissions
Nine years ago, the Great East 日本 Earthquake caused the spread of a large amount of radioactive materials. Even now, the amount of contaminated water is increasing at a rate of 180 tons per day, and it is said that the storage tanks for the contaminated water will run out of space in the next two years (Fig. 1). If the contaminated water is discharged into the ocean, it will cause reputational damage to the fishing industry, and the environmental pollution. We are conducting to research to prevent it from happening. In the wake of the nuclear accident, the senior started water quality surveys at Chaya Marsh near the school. During the survey, they found (Chara braunii, Fig. 2), (Nitella axilliformis, Fig. 3), Closterium moniliferum (Fig. 4), and (Nostoc commune, Fig. 5).
傅立葉轉換於奈米螢光鑽石超微量偵測之研究
螢光奈米鑽石(Fluorescent Nanodiamond, FND)主要應用於生物定位,其結構中與一個氮原子相鄰的晶格缺陷部分(Nitrogen-Vacancy, NV^-)照射波長532nm的雷射會發出637nm的螢光,對FND施加磁場會使螢光強度減弱。由於在低濃度溶液中螢光訊號會被溶液的背景雜訊掩蓋而難以偵測,因此設計實驗對FND施加穩定變換的磁場,此動作能夠使螢光強度也進行相同週期的變化。針對此週期進行快速傅立葉轉換(Fast Fourier Transformation, FFT)得出的數值會與螢光強度呈正比,進而推知FND濃度,有效排除不隨磁場變動的背景雜訊。研究結果顯示,施加磁場並使用FFT能夠成功排除牛血清蛋白(Bovine Serum Albumin, BSA)、碘化丙啶(Propidium Iodide, PI)、水、血液的背景輻射,且FND在高離子濃度溶液中會沉澱,在表層包覆BSA則可以有效地改善此現象。FND不易受到血液的背景輻射干擾螢光測定。