- 學位論文
原水管柱砂濾研究
Removal of Heavy Metals and Selected Pollutants from Raw Water by Sand Filtration
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摘要
本研究探討石英砂慢砂濾管柱對原水中特定污染物與重金屬去除效果。檢測的項目有：濁度、色度、氨氮、COD、重金屬(鉻、砷、鉛、汞、鎘、鋅、銅、鎳)等。 研究結果顯示進流濁度4NTU的去除率為55%~67%，進流色度30 (鈷鉑單位)去除率為50%~60%，進流氨氮1 mg/L的去除率為44%~57%，進流COD 500 mg/L的去除率為17%~21%。石英砂對八種重金屬的吸附效果並不相同。八大重金屬進流濃度為100 mg/L時，其達飽和時之床體積大小為Cd = Cr(3.18) > Zn = Cu = Ni(2.39) > Pb = Hg(1.99)。當進流濃度為0.05 mg/L時，其達飽和時之床體積大小為Cd(3.18) > Cu(1.99) > Zn (1.59) > As = Cr = Pb (1.19) > Hg(0.72) > Ni (0.40)。Adam’s–Bohart model對重金屬的吸附模擬結果顯示：石英砂對高濃度重金屬(100 mg/L)吸附R2約為0.67至0.86，低濃度重金屬(0.05 mg/L)的R2值為約為0.51至0.84。 本研究顯示，管柱慢砂濾系統對選定之污染濃度原水水質處理有一定的效果，其結果可作為水質改善處理之參考。
並列摘要
This study investigated the removal efficiency of selected pollutants including turbidity, color, ammonia, COD, heavy metals (Cd, Cr, Cu, Ni, Pb and Zn). Results showed that the influent turbidity of 4NTU had 55%~67% removal rate while influent color of 30 (Cobalt Platinum unit) had 50%~60% removal efficiency. Influent ammonium 1 mg/L and influent COD 500 mg/L showed to have the removal efficiency of 44%~57% and 17%~21% respectively. Heavy metals uptake by sand filtration showed different adsorption efficiency. As influent concentration of eight heavy metals was 100 mg/L, the bed volume achieving saturated levels was observed to be Cd = Cr(3.18) > Zn = Cu = Ni(2.39) > Pb = Hg(1.99). Compared to influent concentration of 0.05 mg/L, the bed volume achieving saturated levels showed different order of Cd(3.18) > Cu(1.99) > Zn (1.59) > As = Cr = Pb (1.19) > Hg(0.72) > Ni (0.40). Results of Adam’s–Bohart model showed that R2 for 100 mg/L uptake was 0.67-0.86 while that for 0.05 mg/L was 0.51-0.84. Results indicated that uptake of turbidity, color, ammonia, COD, heavy metals (Cd, Cr, Cu, Ni, Pb and Zn) in raw water by column sand filtration showed to have the beneficial effects for water treatment.
參考文獻
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