磷是水中藻類生長的主要營養來源之一，即便其在水中的濃度非常低，也會導致促使藻類增生及水體的優養化。作為一種沒有已知替代品的不可再生資源，磷回收和再循環的需求變得十分重要。為了有效控制湖庫水中藻類繁殖過多的情況並回收磷酸鹽，本研究利用兩種商用除磷材料，為由德國LANXESS公司所提供之成分為針鐵礦(α-FeOOH)組成之顆粒狀吸附劑Bayoxide® E33 (簡稱E33)和成分為苯乙烯二乙烯苯(styrene divinylbenzene)組成之離子交換樹脂Lewatit® MonoPlus M600 (簡稱M600)，探討其吸附湖庫水中低濃度磷酸鹽的可行性。
吸附實驗結果顯示，縮小E33顆粒大小能減少吸附磷酸鹽平衡所需時間，加速其吸附速率。動力實驗結果顯示，100至200mesh粒徑之E33在五天內達到平衡，而M600則在一天內達到平衡，其吸附平衡容量分別為3.55mg-P/g與6.12mg-P/g，動力模型上分別較為符合Elovich模型與偽一階模型。平衡實驗顯示兩種除磷材料對磷酸鹽的去除量隨著添加的吸附劑量增加而減少。且兩種吸附劑在弱鹼性(pH值為8.5±0.1)的情況下，皆較符合Freundlich isotherm model。
為了瞭解兩種除磷材料之循環壽命，研究中將兩種除磷材料進行三次的吸附脫附循環實驗，結果顯示在去離子水中，E33和M600在吸附與脫附上皆有很好的表現，脫附更是每次皆高達95%以上。相對的在環境水體中，E33在吸附磷酸鹽有更佳的去除率，但脫附回收率則較於去離子水來的低；M600則在吸附與脫附中皆表現較差。
本研究並進行了迷你管柱實驗模擬現地運用可行性。結果顯示E33在最初能夠有效去除環境水體中的磷酸鹽，當接觸45,000BV後，便達到飽和吸附；而M600由於選擇性較低，因此在最初就無法有效去除環境水體中的磷酸鹽。

This study evaluates the feasibility of two commercial phosphorus removal materials, Bayoxide® E33 (goethite-based) and Lewatit® MonoPlus M600 (ion exchange resin), previously proven effective in removing high-concentration phosphates, for the removal of low-concentration phosphates from lake and reservoir water. The assessment involved batch kinetics, sorption isotherms, mini-column tests, and material characterization.
Adsorption experiments revealed that reducing the particle size of E33 enhances its adsorption rate, but M600 reached equilibrium faster than both sizes of E33. M600 exhibited a higher adsorption capacity compared to E33. The kinetic models indicated that E33 conformed to the Elovich model, whereas M600 fit the pseudo-first-order model. In the equilibrium experiment, both adsorbents were better represented by the Freundlich isotherm model under weakly alkaline conditions.
After three adsorption-desorption cycles, results showed that both E33 and M600 performed well in deionized water for adsorption and desorption. However, in natural water, E33 exhibited a higher phosphate removal efficiency, while M600 performed poorly in both adsorption and desorption.
Mini-column tests indicated that E33 effectively removed phosphates from natural water initially, with saturation occurring after 45,000 BV. Conversely, M600, due to its lower selectivity to phosphate, failed to effectively remove phosphates from natural water.

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