| 摘要: | 污染嚴重之二仁溪、鹽水溪底泥中鐵氧化物含量濃度變化範圍大於輕度污染之曾文溪、急水溪、朴子溪及北港溪底泥中鐵氧化物含量，六條河川底泥中錳氧化物含量濃度變化則和污染情況無相關。鹽水溪底泥中重金屬(Ni、Co、Cr、Zn、Pb)與每克鐵氧化物中鍵結之重金屬含量成指數型態正相關且相關係數分別高達0.89、0.96、0.95、0.95及0.80。二仁溪底泥中平均每克鐵氧化物中鍵結之重金屬(Cu、Ni、Cr、Zn、及Pb)與重金屬含量成指數形態正相關且相關係數分別高達0.91、0.98、0.80、0.85、及0.98。可以指數模式表示為：
ln M = A + B × (Metal bound to iron oxides/Iron oxides)
輕度污染之曾文溪、急水溪、朴子溪及北港溪底泥中單位重量鐵氧化物中與鐵氧化物鍵結重金屬量對重金屬含量之關係性則為線性模式：
M = A + B × (Metal bound to iron oxides/Iron oxides)
受高度污染底泥中單位重量錳氧化物鍵結重金屬量對重金屬含量存在明顯之正相關性，可以線性數學模式表示為：
M = C + D × (Metal bound to manganese oxides/Manganese oxides)
輕度污染之曾文溪、急水溪、朴子溪及北港溪底泥中單位重量錳氧化物鍵結重金屬量對重金屬含量除Zn外，正相關性並不明顯。
The concentration range of iron oxides contents in the Yenshui and Ell-ren river sediment were larger than those in the Tsengwen, Chishui, Potzu, and Peikang Rivers. However, the concentration range of manganese oxides contents in the six rivers` sediment did not have significant correlation with pollution level. The total extractable heavy metals (Ni, Co, Cr, Zn, and Pb) correlated well in exponential model and had positive significant correlation with metals bound to per unit weight iron oxides in 0.89, 0.96, 0.95, 0.95, and 0.80 in the Yenshui river sediment. Similarly, the exponential correlations for Cu, Ni, Cr, Zn, and Pb in Ell-ren river sediment were 0.91, 0.98, 0.80, 0.85, and 0.98. Also the empirical exponential model could be expressed as below.
ln M = A + B × (Metal bound to iron oxides/Iron oxides)
The correlations between iron oxides contents and heavy metals bound to per unit weight iron oxides in scarcely polluted river sediment could be expressed as empirical linear model.
M = A + B × (Metal bound to iron oxides/Iron oxides)
The correlations between manganese oxides contents and heavy metals bound to per unit weight manganese oxides in heavily polluted Yenshui and Ell-ren river sediment were significant and could be expressed as empirical linear model.
M = C + D × (Metal bound to manganese oxides/Manganese oxides)
However, the correlations between manganese oxides contents and heavy metals bound to per unit weight manganese oxides in the Tsengwen, Chishui, Potzu, and Peikang Rivers were not significant, except Zn. |
