jon asked in 科學化學 · 1 decade ago

陽離子交換容量及鹽基飽和度計算

以下土壤污染計算題,煩請高手解惑,謝謝!某土壤分析結果,100g土壤中含180ppmAl3+、40ppmCa2+、24.3ppmMg2+、39ppmK+及2meq/100g的H+,pH5.4,求(1)CEC,(2)鹽基飽和度。

2 Answers

Rating
  • 小白
    Lv 7
    1 decade ago
    Favorite Answer

    (1)

    Al3+ = 180 ppm = 180 / 90 = 2 meq / 100 g soil

    Ca2+ = 40 ppm = 40 / 200 = 0.2 meq / 100 g soil

    Mg2+ = 24.3 ppm = 24.3 / 121.5 = 0.2 meq / 100 g soil

    K+ = 39 ppm = 39 / 390 = 0.1 meq / 100 g soil

    H+ = 2 meq / 100 g soil

    CEC = 2 + 0.2 + 0.2 + 0.1 + 2 = 4.5 meq / 100 g

     

    (2)

    飽和度 = ([Ca2+] + [Mg2+] + [K+]) / CEC x 100% = 0.5 / 4.5 x 100% = 11.1%

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  • 1 decade ago

    謝謝!尤其所提供之網站內容獲益良多。

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