利用牡蠣殼粉等溫吸附磷之研究

The Study of Adsorption Isotherm by Using Oyster Shell Powder Adsorbs Phosphorus

林巧雯(Chiao-Wen Lin) ； 張文亮(Wen-Lian Chang)

《農業工程學報》 57卷3期 (2011/09) Pp. 32-43

https://doi.org/10.29974/JTAE.201109.0003

摘要

牡蠣爲台灣西南沿海常見的養殖生物，其副產物牡蠣殼卻造成相當嚴重的廢棄物問題。若可利用牡蠣殼成爲現地處理中，吸附污水中磷的介質，不但可減少牡蠣殼過多的數量問題，也可降低水中磷的濃度，改善水質優養化。本研究主要探討不同粒徑間，三種粒徑的牡蠣殼粉(0.42~0.84 mm)，透過Langmuir等溫吸附實驗設計，求取牡蠣殼對磷的最大吸附量，並與其他吸附材料做比較。希望藉由以上研究，建立牡蠣殼吸附磷的能力和相關參數，供日後牡蠣殼移除污水中磷之應用。其結果顯示，牡蠣殼對磷的吸附與Langmuir Isotherm的假設接近。粒徑爲0.42 mm，0.59 mm，084 mm，其最大吸附量(qm)分別爲：200 mg/kg，166.67 mg/kg，125 mg/kg，最大吸附量隨著粒徑減小而增加。和不同種類的土壤和常用於吸附磷的材料比較，牡蠣殼也能夠成爲吸附磷的介質，其效果相似。

關鍵字

牡蠣殼 ； 磷 ； Langmuir等溫吸附

並列摘要

Oyster is a common marine-cultural product at the southwest coast of Taiwan; but the by-product, oyster shell, often caused serious waste problem. If oyster shell could be used at on-site treatment as a medium material to adsorb phosphorus in wastewater, it might reduce not only the amount of wasted oyster shell, but also both the concentration of phosphorus and eutrophication problem.This study is aim to use three different particle sizes of oyster shell powder between 0.42~0.84 mm under the experimental design of Langmuir Isotherm to obtain the maximum capacity of oyster shell of absorbing phosphorus, and compare the results with other adsorbents. Through these studies, this research might establish phosphorus adsorption capacity and related parameters of oyster shell while applying oyster shell on removing phosphorus in the future.The results showed that adsorption of phosphorus by using oyster shell were similar with the assumptions of Langmuir Isotherm: the maximum adsorption capacity of three particle sizes of oyster shell powder 0.42 mm, 0.59 mm and 0.84 mm were 200 mg/kg, 166.67 mg/kg, and 125 mg/kg. The maximum adsorption capacity increased with the decreasing of particle sizes. Compared with different types of soil and materials, the phosphorus adsorption ability of oyster shell was similar to them.

並列關鍵字

Oyster shell ； Phosphorus ； Langmuir Isotherm