丙烯酸修飾氧化石墨烯吸附水中汙染物之研究

A study on the sorption of water pollutants by using an Acrylic acid modified Graphene oxide

劉家亨(Jia-Heng Liu)

指導教授 ： 游勝傑 ； 王雅玢 ； 江政傑

中原大學/工學院/環境工程學系/碩士(2017年)

https://doi.org/10.6840/cycu201700708

摘要

長久以來利用碳材料去除重金屬的效率一直不盡人意，本研究利用新興材料氧化石墨烯為研究對象，其擁有高比表面積與優良的物化特性在近幾年被發現，我們利用丙烯酸改質氧化石墨烯特性，使其吸附機制更適合重金屬去除，由XRD與SEM分析其元素組成與表面結構，並利用偶氮染劑汙染物的吸附實驗測試其化學性質與最佳吸附條件。
在台灣工業區廢水銅離子濃度約在100 mg/L、200 mg/L或300 mg/L範圍內，GOA在此3種不同濃度之吸附量分別為113 mg/g、147 mg/g與158 mg/g，吸附效率優於一般氧化石墨烯與活性碳，並且與活性碳相比較，可縮短吸附達平衡時間，僅需要30分鐘即可達吸附飽和。
利用吸附染劑實驗與光學儀器測試結果顯示，GOA失去部分π-π結構以換取更多的羧基官能團，進而獲得更優良的分散度與重金屬吸附能力，但是也因為官能團的增加，使其更容易受到強酸強鹼環境中對官能團的影響，導致在極端pH值環境會有團聚及還原現象發生。

關鍵字

氧化石墨稀、吸附、重金屬、偶氮染劑

並列摘要

The use of carbon materials to remove heavy metals was unsatisfactory. In this study, the utilization of novel materials such as graphene oxide was studied. The adsorption mechanism was modified by acrylic acid, and the adsorption mechanism was more suitable for heavy metal removal.
The results showed that the concentration of acrylic acid modified graphene oxide (GOA) was 113 mg/g, 147 mg/g and 158 mg/g, respectively, in the range of 100 mg/L, 200 mg /L and 300 mg / L copper ion concentration in industrial wastewater. , The adsorption efficiency is better than the general oxidation of graphite and activated carbon, and adsorption balance only takes 30 minutes.
The results show that GOA cab lost some π-π structure in exchange for more carboxyl functional groups to obtain a better dispersion and heavy metal adsorption capacity, but also because of the increase of functional groups, it is more likely to be affected by the increase of functional groups. Strong acid and alkali environment on the impact of functional groups, resulting in extreme pH environment will be reunion and reduction phenomenon.

並列關鍵字

Graphene Oxide, Adsorption, Heavy metals, Azo dyes

參考文獻

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