臺灣國際科展

大自然的奧妙~土壤自我淨化能力

科展類別
臺灣國際科展
屆次
2002年
科別
環境科學
學校名稱
國立沙鹿高級工業職業學校
指導老師
王怡雯
作者
李宛玲、葉玲君
關鍵字
自淨能力,重金屬,污染

摘要或動機

大氣圈、水圈與土壤圈是構成自然環境的三大領域,三者之間相互的影響,原本這些空間都具有極大的包容力,亦所謂「自淨能力」,許多的物質進入其中皆會被氧化分解或稀釋而消失於無形。近年來由於工業發展、人口增加,產生大量的廢棄物,長期、密集且迅速的堆積於環境中,使得天然的自淨能力無法應付而失去功能,造成嚴重的後果。就土壤而言,雖有較佳的自淨能力,但是一受污染,除了嚴重破壞土壤品質之外,同時也會直接或間接污染水源 (如:地下水)及空氣,對動植物造成危害,並且難以回復,實不容忽視。本實驗探討:一、土壤淨化能力是否受到不同地區、不同土壤性質的影響。二、同樣的土壤,對不同的污染物(色素、肥料、重金屬)淨化能力強弱的影響。實驗結果顯示大肚山土壤過濾溶液中的色素、磷、及重金屬中的鉻、鎳、銅的能力較中寮及大甲土壤強,只有氮與鉀的過濾能力較大甲土壤差,所以這次實驗中大肚山土壤有最好的污染淨化能力。實驗結果將來也許可以應用於土壤處理場址之適宜性評估。The air, water and soil are three parts of the nature. They affect each other. In fact, they have the "self-purity ability" - they can disassemble many polluted thing by this kind of self-purity ability. These years, because the industry development and the population explosion make lots of waste, the self-purity ability cannot do its best. The soil has better self-purity ability, but if it is polluted, it will not only pollute the water (ex: underground water) and the air, but also damage the animals and plants. We cannot ignore the serious result. This experiment will discuss:1. If the soil self-purity ability is affected by different area and different soil specificity? 2. The different purified results according to the different pollutant (ex: color, fertilizer and heavy metal) in the same soil. Results showed that Da-Du-San soil had strong ability then Chung-Liao and Da-Cha soil in filtrated color, phosphor, chromium, nickel and copper in the solution, but had weak ability then Da-Cha soil in filtrated nitrogen and potassium. Therefore, Da-Du-San soil had the beast pollution-purity ability in this experiment. In the future, results may be applied to the suitability evoluation of the soil treatment place.


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