本文關(guān)鍵詞： 海藻酸鈉 氧化石墨烯 膜 吸附 過濾 脫吸附　出處：《青島大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著人類社會的高速發(fā)展,紡織、印染、造紙等行業(yè)對染料的使用不斷增加。染料污水的隨意排放不僅會對自然界的生態(tài)環(huán)境造成影響,而且會對人類健康產(chǎn)生威脅,因此染料廢水排放前進行處理成為了必然的要求。在所有的處理方法中,吸附法由于操作簡單,效率高,且能夠有效地大規(guī)模去除大分子污染物已成為使用最廣泛、有效地水處理方法。本文通過酸化法對海藻酸鈉進行了改性,制備出酸化海藻酸鈉(ASA)。采用不同的表征手段對其形態(tài)和理化性質(zhì)進行了表征研究,并通過系統(tǒng)的實驗,對不同外界條件對ASA吸附亞甲基藍(MB)的吸附性能的影響進行了研究分析。由Langmuir等溫線模型計算出在298 K時理論最大吸附容量能達到1552 mg/g。熱力學(xué)研究表明ASA對亞甲基藍的吸附反應(yīng)是自發(fā)放熱的過程。用改良的Hummers氧化方法對氧化石墨烯(GO)進行制備。并用不同的表征手段對其表面形態(tài)、晶格結(jié)構(gòu)和熱穩(wěn)定性進行了測試分析。采用共混及冷凍干燥法相結(jié)合的新穎方法制備了海藻酸鈣膜(CAM)及海藻酸鈣/氧化石墨烯復(fù)合膜(CA/GOM)。采用不同的表征手段對其物化性質(zhì)進行了表征研究。通過系統(tǒng)的吸附實驗對其在不同條件下的吸附性能進行了測定,同時用不同的吸附模型對其吸附動力學(xué)數(shù)據(jù)進行評估,進一步用Langmuir及Freundlich模型對CAM和CA/GOM的等溫吸附平衡數(shù)據(jù)進行描述,計算結(jié)果表明這兩種膜擁有較大的理論吸附容量。熱力學(xué)研究表明CAM和CA/GOM對亞甲基藍的吸附行為均為自發(fā)放熱的過程。通過多次循環(huán)脫吸附實驗后CAM和CA/GOM依舊有較高的吸附能力,表明這兩種膜是擁有優(yōu)良吸附能力且能實現(xiàn)多次重復(fù)使用的吸附劑。
[Abstract]:With the rapid development of human society, textile, printing and dyeing, papermaking and other industries continue to increase the use of dyes, dye sewage discharge will not only affect the ecological environment of nature. And it will be a threat to human health, so the treatment of dye wastewater before discharge has become an inevitable requirement. Among all the treatment methods, adsorption method is easy to operate and high efficiency. And the removal of macromolecular pollutants on a large scale has become the most widely used and effective water treatment method. In this paper, alginate was modified by acidification. Acidified sodium alginate was prepared. The morphology and physicochemical properties of ASAA were characterized by different characterization methods, and systematic experiments were carried out. Adsorption of methylene blue on ASA under different external conditions. Based on the Langmuir isotherm model, the theoretical maximum adsorption capacity can reach 1552 at 298K. Thermodynamic studies show that the adsorption of methylene blue by ASA is a self-exothermic process. The surface morphology was characterized by different methods. The lattice structure and thermal stability were tested and analyzed. The calcium alginate membrane (CAM) and calcium alginate / graphene oxide composite membrane (CA/ GOM) were prepared by a new method of blending and freeze-drying. The physicochemical properties were studied by different characterization methods, and the adsorption properties under different conditions were determined by systematic adsorption experiments. At the same time, the adsorption kinetic data were evaluated with different adsorption models. The isothermal adsorption equilibrium data of CAM and CA/GOM were described by Langmuir and Freundlich models. The thermodynamic study shows that the adsorption behavior of methylene blue by CAM and CA/GOM is a self-releasing heat process. CAM and CA/GOM still have high adsorption ability. These two kinds of membranes are good adsorbents with good adsorption ability and can be reused for many times.
【學(xué)位授予單位】：青島大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X703;O647.3

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本文編號：1480668