為了改善重金屬污染與減少腎臟血液透析時間，開發各式材料來提升效能解決吸附能力不足之問題。本實驗使用具有高吸附性(High adsorption)之生物降解性材料-幾丁聚醣(Chitosan)。製備為膠珠(Beads)或及塗層濾紙等材料，以化學改質調變產品之表面官能基，提高吸附位點及吸附位點。以等溫吸附模型與吸附動力方程式計算產品吸附銅離子之吸附機理。最後在吸附尿素問題，加入以三聚磷酸鈉與銅離子進行物理改質之部分，並與化學改質吸附尿素能力進行比較，計算等溫吸附模型與吸附動力方程式觀察塗層濾紙吸附尿素之機制，可製備出多吸附選擇性塗層濾紙。
幾丁聚醣經過不同化學改質後，經過傅立葉轉換紅外光譜確認帶有羧基與氨基結構。使官能化後之幾丁聚醣吸附銅離子能力提高，在1000 ppm銅離子濃度時吸附容量可達到300 mg/g以上；經過三次脫附過程，能使重量損失在20 % 以內，吸附容量下降在10 % 以內，證明了幾丁聚醣的循環再生性與可利用性。以等溫模型-朗繆爾(Langmuir)與吸附動力學模型-假二階方程式( pseudo-second-order equation)可以用來說明銅離子吸附到幾丁聚醣之吸附機制。在尿素吸收方面，本實驗製備出最佳Ehrlich's reagent應用在尿素檢測上，判定係數高達0.99807，證明其在尿素檢測有良好的準確性。其後製備出物理交聯之塗層濾紙，以XRD與WVTR或WVP定義交聯程度，並與銅離子進行交聯並，成功使500 ppm尿素溶液之尿素移除率達到70 %以上，在破裂強度、抗腐蝕作用與溶脹作用皆有明顯改善。最後以等溫模型-弗羅因得利(Freundlich)與吸附動力學模型-假二階方程式來說明尿素分子吸附到幾丁聚醣之吸附機制。

In order to improve the problem of heavy metal industry and the time of renal hemodialysis, various products will be developed to improve the efficiency and solve the problem of insufficient adsorption capacity. This experiment will use chitosan, a biodegradable material with high adsorption. It is prepared into gel beads or coated filter paper and other products prepared by dip coating method, and then tried to use chemical modification to increase the adsorption performance of the product, increase the adsorption site, and achieve the purpose of functionalization. The adsorption mechanism of the product adsorbing copper ions is calculated by the isotherm adsorption model and the adsorption dynamic equation. Finally, in the adsorption of urea, the part of physical modification with sodium tripolyphosphate and copper ions is added, and the adsorption capacity of the chemical modification is carried out. Finally, the isothermal adsorption model and the adsorption dynamic equation are calculated to observe the mechanism of urea adsorption by the coated filter paper, and a multi-adsorption selective coated filter paper is prepared.

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