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題名 | 以有限混合分佈理論區分土壤鎘污染的分級=Using Finite Mixture Distribution Therory to Classify Standard of Cadmium Concentration in Soil |
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作者姓名(中文) | 張文亮; 楊松岳; | 書刊名 | 農業工程學報 |
卷期 | 45:4 1999.12[民88.12] |
頁次 | 頁55-60 |
分類號 | 434.22 |
關鍵詞 | 鎘; 土壤污染; 有限混合分布理論; Cadmium; Soil pollution; Finite mixture distribution theory; |
語文 | 中文(Chinese) |
中文摘要 | 土壤污染的界定值將會是政府執行土壤污染防治的重要依據。民國八十二年行政 院環境保護署試圖從各方面建立重金屬的分級。本研究是以有限混合分佈理論的觀念求得臺 灣地區土壤中重金屬含量的背景值及將現有土地污染程度分級,以便未來對於土壤重金屬污 染的管理。最後所求得的結果可以得到臺灣地區土壤中的鎘含量背景值為<0.368mg/kg將污 染土壤區分為五級,分別為0.368~1.123mg/kg、0.123~2.515mg/kg、2.515~4.283mg/kg、 0.283~5.170mg/kg及5.170mg/kg以上。根據研究結果臺灣土壤的鎘含量背景值為 0.368mg/Kg, 離自然背景值的統計分佈界定值為5.170mg/kg,佔臺灣農田面積的1.68%。 |
英文摘要 | The criteria of soil pollution are the legal standard for government to execute soil pollution prevention. In 1993, Environment Protection Agency of Taiwan tried to establish the classification criteria for heavy metal of soils. This study uses finite mixture distribution theory to classify cadmium concentration and establish its classification criteria. According to our analysis, the background level of the cadmium quantily of soils in Taiwan is a <0.368mg/kg in background and four levels in the polluted soil, including 0.368~1.123mg/kg, 0.123~2.515mg/kg, 2.515~4.283mg/kg, 4.283~5.170mg/kg and over 5.170mg/kg. After polluted soil can be classified into five levels, including background, second, third, fourth and fifth level. The boundary between the cadmium quantity within the normal soils and the one within the polluted soils is 0.368 mg/kg. Moreover, the statistical criteria in fifth level, which exist the farest distance with natural background as 5.170mg/kg, and 1.68% of soil are classified as this category. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。