臺灣博碩士論文加值系統

由於土壤中重金屬極易與有機質發生錯合反應，因此無機污染物在土壤中
之傳輸與土壤所含的有機質有著密不可分之關係。本研究選取中福土、台
中土及林口土，分別探討添加堆肥、腐植酸及泥炭土等三種天然有機質對
三種土壤中重金屬移動性之影響，實驗過程中不同溫度、濕度及pH值對重
金屬移動性之影響也一並加以研究。實驗結果顯示添加三種有機質以堆肥
及腐植酸對重金屬溶出量之減少效果較顯著；對於銅而言以堆肥較好，而
鎘則以腐植酸之添加較佳。至於泥炭土則對於三種重金屬而言均為三種添
加有機質中之最差者。不同溫度對重金屬移動性之影響有限，以35℃對重
金屬之溶出減少效果略佳，但與4℃及20℃間的差別不大，顯示微生物之
作用性不強。在含水率方面，35％之重金屬溶出量較17％稍高，乃因水分
含量高增加了重金屬離子之移動性所致。台中土及林口土對重金屬吸附，
以台中土之吸附性較林口土強，對於銅、鉛之阻滯效果在三種土壤間之差
別不大，而對於鎘之吸附則以中福土較好。綜合而言，重金屬在土壤中之
移動性，不僅需考慮土壤之基本性質，土壤pH值與重金屬本身之性質，另
外土壤所含有機質之量與種類也應一併加以考慮，如此對於重金屬在土壤
中之傳輸行為才能做準確的評估。

oxicity characteristic leaching procedure(TCLP) is designed o
determine the mobility of both organic and inorganicompounds
present in solid wastes. The Taiwan Government isurrently using
TCLP as the evaluation process for controlledazardous wastes
including contaminated soil. We now havevidence that in some
cases of soil, it may be possible toeduced the concerntration
of heavy metal in TCLP extracthrough the formation of metal-
humate complexes.umic acid , compost and peat were incorporated
into threeifferent types of soil in an attempt to reduce the
mobilityf Cd, Pb, and Cu. The amended soils were moistended to
50％nd 100％ field capacity and incubated at 4℃, 20℃ and 35
℃.hen humic acid was added to soil, a significant decrease
Cund Pb in TCLP extract was obsered. Addition of peat andompost
to soil showed less effect on the binding of Cu and Pbo humus.
The organic matter derived from humic acid was ateast two times
more effective than peat for formationd-humate complexes;
additing compost was nearly as effectives peat.