本文關(guān)鍵詞：氧化石墨烯復(fù)合材料的制備及在染料吸附中的應(yīng)用　出處：《天津工業(yè)大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 氧化石墨烯 PVA海綿 吸附 染料廢水 亞甲基藍(lán) 甘蔗渣

【摘要】：氧化石墨烯(GO)材料由于其超大的比表面積和豐富的含氧官能團(tuán)使其在染料吸附方面具有吸附速率快、吸附容量大的特點(diǎn)。然而由于其極易分散在水中且難于分離,對(duì)染料吸附后的處理過(guò)程帶來(lái)了極大困難。本論文將GO分別和甘蔗渣、密胺海綿及聚乙烯醇(PVA)相結(jié)合,制備出了對(duì)水體中亞甲基藍(lán)染料具有良好吸附性能的復(fù)合材料。具體內(nèi)容及結(jié)果如下:首先,將GO負(fù)載于甘蔗渣表面,制備出了復(fù)合吸附材料。通過(guò)靜態(tài)吸附和動(dòng)態(tài)吸附探究了 GO的負(fù)載量對(duì)吸附材料吸附性能的影響。研究結(jié)果顯示,GO/甘蔗渣復(fù)合材料對(duì)亞甲基藍(lán)的最大吸附量為161mg/g,在柱吸附測(cè)試過(guò)程中,染料溶液pH值、吸附柱中吸附劑填充量以及甘蔗渣表面GO的負(fù)載量是影響吸附柱吸附容量的主要因素。其次,分別利用三種粗化方法對(duì)商業(yè)密胺海綿表面進(jìn)行粗化處理,并將GO負(fù)載于其表面,制備了改性吸附海綿,探究了該改性海綿對(duì)亞甲基藍(lán)染料的吸附性能。研究結(jié)果顯示,采用多巴胺作為密胺海綿表面粗化方法所制得的復(fù)合海綿對(duì)亞甲基藍(lán)的吸附效果最好,并且具有較快的吸附速率和較高的吸附容量。最后,將GO和PVA相混合,分別利用十二烷基硫酸鈉和淀粉作為發(fā)泡劑制備出了兩種PVA/GO復(fù)合吸附海綿。對(duì)該吸附材料進(jìn)行了動(dòng)力學(xué)過(guò)程和熱力學(xué)過(guò)程擬合,并利用柱吸附實(shí)驗(yàn)檢測(cè)了其吸附性能。研究結(jié)果顯示,該吸附材料的吸附方式符合Langmuir吸附模型,吸附過(guò)程符合準(zhǔn)二級(jí)動(dòng)力學(xué)模型。兩種海綿的最大吸附量分別為289.6mg/g和182.6mg/g,在柱吸附過(guò)程中不借助任何外部能量,僅僅依靠染料廢水的自身重力便可以實(shí)現(xiàn)對(duì)亞甲基藍(lán)的吸附分離,其水通量可達(dá) 20Lm~(-1)h~(-1).
[Abstract]:Graphene oxide (GOO) materials have high adsorption rate for dyes due to their large specific surface area and abundant oxygen-containing functional groups. However, because it is easy to be dispersed in water and difficult to separate, it brings great difficulties to the treatment of dye adsorption. In this paper, go and bagasse are divided into two groups, go and bagasse. Melamine sponge and polyvinyl alcohol PVA (PVA) were combined to prepare composite materials with good adsorption performance for methylene blue dyes in water. The specific contents and results are as follows: first of all. The composite adsorption materials were prepared by loading go on the surface of bagasse. The effects of the loading amount of go on the adsorption properties of bagasse were investigated by static and dynamic adsorption. The maximum adsorption capacity for methylene blue was 161 mg / g. The pH value of dye solution was measured by column adsorption. The amount of adsorbent filled in the adsorption column and the loading amount of bagasse surface go were the main factors affecting the adsorption capacity of the adsorption column. Secondly, three coarsening methods were used to roughen the surface of commercial melamine sponge. The modified adsorption sponge was prepared by loading go on its surface. The adsorption properties of the modified sponge to methylene blue dye were investigated. The results showed that the modified sponge could adsorb methylene blue dye. The composite sponge prepared by using dopamine as the surface coarsening method of melamine sponge has the best adsorption effect on methylene blue and has a faster adsorption rate and a higher adsorption capacity. Finally. Go and PVA are mixed. Two kinds of PVA/GO composite adsorption sponge were prepared by using sodium 12 alkyl sulfate and starch as foaming agents respectively. The kinetic and thermodynamic processes of the adsorbed sponge were simulated. The adsorption performance was tested by column adsorption experiment. The results showed that the adsorption mode of the adsorbed material was in accordance with the Langmuir adsorption model. The maximum adsorption capacity of the two sponges was 289.6 mg / g and 182.6 mg / g, respectively, without any external energy. The adsorption and separation of methylene blue can be realized by relying on the gravity of dye wastewater alone. The water flux of methylene blue can reach 20 L ~ (m ~ (-1)) ~ (-1) h ~ (-1) ~ (-1) ~ (-1).
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TB33;TQ424

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本文編號(hào)：1435141