水綿屬及剛毛藻屬大型絲狀藻對重金屬(Cu2+)吸附比較之研究

Comparison of the biosorption of copper(II) aqueous solution by the Spirogyra and Cladophora filamentous macroalga

黃世俊(Shih-Jyun Huang)

指導教授 ： 張穗蘋

崑山科技大學/工程學院/環境工程研究所/碩士(2009年)

https://doi.org/10.6828/KSU.2009.00001

摘要

台灣現今的工業社會蓬勃發展，在金屬處理、半導體電子產業裡，銅為排放廢水中的重要成份。目前去除廢水中銅離子的方法有離子交換、混凝沉澱、逆滲透、薄膜處理、蒸發回收等，但是在這些處理方法中發現，當金屬廢水溶液為低濃度時所利用這些化學處理的效果並不好，而且其處理的費用太昂貴。本研究利用同屬大型著生性絲狀綠藻之水綿藻及剛毛藻作為吸附劑，探討其吸附銅溶液之可行性與吸附特性之比較。
水綿藻吸附銅離子的實驗結果顯示，當銅溶液的pH值在4.5、溶液濃度為100 mg/L、藻類劑量0.1 g/L、反應時間為120分鐘時，可得最大吸附效果，去除率為55%。將所有實驗數據套用至Langmuir之等溫吸附經驗式， R2值在0.99，而每單位重的水綿藻可吸附銅離子117.65 mg/g。
剛毛藻吸附銅離子的實驗結果顯示，當銅溶液的pH值在5.0、溶液濃度為150 mg/L、藻類劑量0.5 g/L、反應時間為60分鐘時，可得最大吸附效果，其去除率為38%。將所有實驗數據套用至Langmuir之等溫吸附經驗式，R2值在0.99，每單位重的剛毛藻可吸附銅離子188 .7 mg/g。

關鍵字

水綿藻 ； 剛毛藻 ； 吸附 ； 銅

並列摘要

Copper is an important pollutant in the wastewater of metal treatment and semi-conductor industries. Several treatment technologies have been proposed to remove copper from wastewater, such as chemical precipitation, electrode deposition, reverse osmosis, adsorption, etc. Among these remedy methods, adsorption is a relatively inexpensive alternative for copper removel. The aim of this research is to develop a low cost adsorbent for wastewater treatment.
This study evaluated the biosorption capacity of green alga Spirogyra and Cladophora species for Cu(Ⅱ) from aqueous solutions. The biosorption capacities were examined by Langmuir and Freundlich isotherms and the results indicated that the biomass is a suitable material for the development of high capacity biosorbent for Cu(Ⅱ) removal.
Powdered biomass of Spirogyra species can rapidly sorbent the target metals. It is observed that the biosorption capacity of the biomass strongly depends on pH and algal dose. The maximum biosorption capacity of 117.65 mg Cu(Ⅱ)/g as dry weight of biomass was observed at an optimum pH of 5.0 in 120 min with an algal dose of 0.1 g/L and 150 mg/L metal concentration in the solution.
The potential of commonly available green algae belonging to Cladophora species investigated isotherms of Cu(Ⅱ) biosorption. It is observed that the biosorption capacity of the biomass strongly depends on pH and algal dose. The maximum biosorption capacity of 188.7 mg Cu(Ⅱ)/g as dry weight of biomass was observed at an optimum pH of 5.0 in 60 min with an algal dose of 0.5 g/L and 150 mg/L metal concentration in the solution. The sorption of both algae was very well described by the Langmuir isotherm.

並列關鍵字

spirogyra ； Cladophpra ； biosorption ； copper

參考文獻

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