電鍍工業是台灣的一項重點工業，從前的電鍍工廠將含有重金屬之廢水直接排放到下水道，導致地下水、河川及海洋嚴重的污染；傳統重金屬處理方法必需加入大量化學藥品，導致產生含重金屬污泥，不但增加污泥處理的困擾，而且這些污泥若遇酸則會再度釋出重金屬而造成二次污染。
水生植物具有吸附重金屬的特性，利用水生植物來處理廢污水中的重金屬是有別於傳統的新穎方法。故本研究利用水生植物陽明柳處理實際電鍍工業廢水，使有毒重金屬含量能有效降低，並降低處理廢水中污泥量。本實驗結果顯示，在配製之有毒重金屬吸附平衡實驗方面，植物對於各個金屬之比吸附率(specific adsorption) 與其殘餘濃度之間的關係符合Langmuir 等溫吸附模式。其最大吸附量(maximal adsorption capacity,Ymax) 以 Cu=58.1mg/g為最大，其次依序為 Pb > Cd > Ni > Zn。而緩衝溶液存在下會嚴重影響到各金屬之吸附平衡，銅、鉛、鉻的最大吸附量Ymax明顯下降情形。
在電鍍廢水實驗方面:陽明柳對甲公司電鍍廢水金屬Cu溶液之最大吸
量為Ymax=20.7mg/g，遠小於配製金屬Cu 溶液最大吸附量Ymax =33.1 mg/g ，此推測因甲公司Cu電鍍廢水因含有鐵等背景污染物所以造成Ymax 下降。另由配製分別外加Fe=10mg/L及外加Fe=30mg/L金屬的Cu溶液。實驗結果顯示，背景污染物鐵離子添加濃度與Ymax 的下降程度成正相關的趨勢。亦即，Cu 金屬溶液所含鐵離子的濃度愈高，則對於吸附Cu 的Ymax 值影響越大。就此推論，甲公司電鍍廢水因含有Fe 24mg/L，其受影響的程度應居中，但實驗結果顯示其Ymax下降程度最多，故可推論甲公司Cu電鍍廢水中可能另含有其他背景污染物質。陽明柳對乙公司 Ni電鍍廢水實驗結果則顯示與實驗室配製溶液無大差異。
本研究的結果將有助益於植物對重金屬吸附過程瞭解，再者，利用植物陽明柳清除廢污水可美化環境，其在工程上運用有非常大的潛力，如果有效的應用水生植物處理電鍍廢水中重金屬將是一創新科技。

Electroplating industry is one important industries in Taiwan. Its wastewater has lead to pollution of the river, ocean, and underground water. Thus, the reduction of the concentration of heavy metals such as Cu, Zn, Ni, Cr, Pb etc. from wastewater is critical. Conventional strategies to remove the heavy metals involve adding abundant chemical agents which results in largy quantity of heavy metal sludge. Secondary pollution might occur as due to the heavy metal sludge contacted with acid.
Aquatic plants have been shown to uptake the heavy metals from the surrounding environment. This unique character is different from the conventional approach and could be applied for removing the heavy metals in wastewater.This study used an aquatic plant, Najas graminea Del, to remove the heavy metals from the prepared metal solution and electroplating wastewater. Our data revealed that the relationship between the specific adsorption and residual concentration of the heavy metal was best described by the Langmiur adsorption isotherm curve. The value of maximal adsorption capacity (Ymax) in copper is 58.1 mg/g. Without buffering, the sequential order for the Ymax in the prepared metal solution is Cu > Pb > Cd> Ni > Zn. The value of Ymax was with significantly reduced under buffering circumstance as compared with that no buffer.
In the electroplating wastewater containnig copper from company A, the value of Ymax was 20.7 mg/g, which was much smaller in prepared copper solution (Ymax =33.1 mg/g). Our further investigation showed that the background contaminatants especially iron in the electroplating wastewater have significant contribution to this discrepancy. In other set of experiments, we found that there is no significant difference between the electroplating wastewater and prepared solution for the adsorption of Ni.
Our results provide useful information the understanding the process for the Najas graminea in adsorption the heavy metals from electroplating wastewater. Futhermore, the application of Najas graminea to remove the pollution from wastewater can protect the enviroment from pollution. This innovative concept has the potential in practical application and could be trasferred into a novel technology to substitute the conventionally physical or chemical treatment for the electroplating wastewater.

目錄
章次 頁數
中文摘要 i
英文摘要 iii
表目錄 vi
圖目錄 vii
附錄目錄 viii
第一章:前言 1
第二章:文獻回顧 3
第三章 實驗材料與設備 10
3-1 植物的培養 10
3-2 試藥及材料 10
3-3 廢水來源 12
3-4 金屬溶液之配製 13
第四章 實驗方法 17
4-1 重金屬分析步驟 17
4-1-1 水生植物的前處理 17
4-1-2 調整 pH 值 17
4-1-3 接觸實驗（contacting experiment） 17
4-1-4 過濾分離 18
4-1-5 微波消化 18
4-1-6 原子吸收光譜之分析 18
4-1-7 重金屬的品質管制 19
4-2其他分析項目 19
第五章 結果與討論 21
5-1 動力學實驗部份 21
5-2 配製溶液部份 22
5-3 甲公司銅電鍍廢水 23
5-4 乙公司鎳電鍍廢水 25
第六章結論與建議 26
6-1 結論 26
6-2 建議 26
參考文獻 28

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