本研究探討以花生殼灰來吸附水溶液中鎳離子的吸附動力學。實驗中，將花生殼置於500°C的高溫爐中鍛燒30分鐘，製成花生殼灰。接著，利用感應耦合電漿質原子發射光譜儀、掃瞄式電子顯微鏡、粒徑測定儀、密度測定儀、表面積測定儀、水份天平及pH計分別進行花生殼灰的組成分析與物理性質之測定。
水溶液中鎳離子濃度是以感應耦合電漿質原子發射光譜儀來量測。
實驗結果顯示，花生殼灰的吸附效率是可接受的。
降低花生殼灰劑量、提高起始鎳離子濃度、pH值、震盪速率或吸附溫度，可提高鎳離子的吸附速率及平衡吸附量。物理吸附是本吸附系統的控制步驟。擬二階速率式可適當的描述吸附動力學數據。最後並迴歸出一條吸附速率式。
實驗也發現，起始鎳離子濃度、pH值、震盪速率及吸附溫度對吸附的影響會被花生殼灰劑量變化的影響所遮蔽。

This study investigates the kinetics of the adsorption of nickel ion from aqueous solution by peanut hull ash (PHA).
Peanut hull ash (PHA) was prepared by calcinating peanut hull in a 500°C box furnace for 30 min. The content and the physical properties of peanut hull ash (PHA) were analyzed by using an inductively coupled plasma atomic emission spectrometry (ICP), a scanning electron microscope (SEM), a laser diffraction particle size analyzer, a density meter, a surface area analyzer, a moisture determination balance and a pH meter.
Nickel concentrations in aqueous solution was determined by an ICP.
Experimental results indicated that PHA prepared was an acceptable absorbent to remove nickel from aqueous solution.
The adsorption rate and adsorption at equilibrium were found to increase with increasing initial nickel concentration, initial pH, stroke speed or adsorption temperature or with decreasing PHA dosage. Physisorption was thought to be the rate determining step for the adsorption process. Pseudo-second-order rate equation was found to interpret the kinetic data suitably. Finally, an empirical adsorption rate equation has been determined.
Experimental results also lead us to suspect that the effects of initial nickel concentration, initial pH, stroke speed and adsorption temperature are concealed by the effect of PHA dosage.

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