鋅金屬化莿竹活性碳流水試驗之抑菌時效

本研究係以國產莿竹為材料，經奈米氧化鋅、硝酸鋅及氯化鋅等鋅化合物，依物理法及化學法製備鋅金屬化莿竹活性碳，藉由掃描式電子顯微鏡（SEM）觀察其表面構造，碘值及亞甲基藍吸附量評估其吸附性質，探討各條件處理材對大腸桿菌（Escherichia coli，簡稱 E. coli）、金黃色葡萄球菌（Staphylococcus aureus，簡稱S. aureus）之抑菌效果。並選取抑菌效果較佳之試樣進行流水試驗，觀測其抑菌時效、水中鋅含量之變化與流水試驗前後之BET比表面積及孔隙變化。試驗結果得知，抑菌時效以奈米氧化鋅處理者高達600 hr為最佳，硝酸鋅者192 hr次之，氯化鋅者為48 hr，而對照組活性碳僅12 hr最差。活性碳流水試驗前後之BET比表面積分別為529.26 m^2／g與507.53 m^2／g，以硝酸鋅處理者為629.26 m^2／g與811.80 m^2／g，以氯化鋅處理者為15.92 m^2／g與583.87 m^2／g，而奈米氧化鋅處理者為2.23 m^2／g與31.12 m^2／g。ICP試驗得知，12 hr後水中鋅含量皆低於5 ppm，其符合行政院環保署飲用水水質標準。

關鍵字

鋅金屬化莿竹活性碳；硝酸鋅；氯化鋅；奈米氧化鋅；抑菌效果；流水試驗

並列摘要

This study prepared zinc-metallized activated carbon to examine thorny bamboo from Taiwan using a physical method and two chemical methods, by mixing zinc nitrate, zinc chloride, and nano-sized zinc oxide with activated carbon. Scanning electron microscopy (SEM) was employed to assess the surface structure, as well as the absorptive properties of iodine value and methylene blue value. This study investigated zinc-metallized activated carbon and the antibacterial efficiency of both Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), choosing samples that exhibit favorable antibacterial efficiency to proceed water flowing test. This study bserved antibacterial effect time, the zinc concentration of water, and the BET specific surface area of zinc-metallized activated carbon.The water flowing test revealed the antibacterial effect time of samples treated with nanosized zinc oxide; 600 hr was the most favorable; and 192 hr of activated carbon treated with zinc nitrate was the second most favorable; the activated carbon treated with zinc chloride was third, and the activated carbon treated for 12 hr was considered the least favorable. The BET specific surface area before and after the water flowing test demonstrated that the specific surface areas of activated carbon were 529.26 m^2/g and 507.53 m^2/g. The activated carbons treated with zinc nitrate were 629.26 m^2/g and 811.80 m^2/g. The activated carbons treated with zinc chloride were 15.92 m^2/g and 583.87 m^2/g. The activated carbons treated with nano-sized zinc oxide were 2.23 m^2/g and 31.12 m^2/g. The ICP test demonstrated that the zinc concentrations of water were all below 5 ppm after 12 hr, conforming to the standard of drinking water as mandated by the Environmental Protection Administration, Executive Yuan, R.O.C. (Taiwan).

並列關鍵字

Zinc-metallized thorny bamboo activated carbon ； Zinc nitrate ； Zinc chloride ； Nano-sized zinc oxide ； Antibacterial efficiency ； Water flowing test

國際替代計量

鋅金屬化莿竹活性碳流水試驗之抑菌時效

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