本文關(guān)鍵詞： 城市污水污泥 鋅電鍍污泥 活性炭 亞甲基藍(lán) 紫外光芬頓　出處：《上海大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著印染工業(yè)的快速發(fā)展,印染過(guò)程產(chǎn)生的印染廢水形成的污染,是中國(guó)目前亟待解決的重要環(huán)境矛盾。城市污水污泥是污水處理系統(tǒng)產(chǎn)生的副產(chǎn)物,含有大量有毒有害物質(zhì),如持久性有機(jī)污染物及重金屬等。傳統(tǒng)的污泥處理方法有濃縮、穩(wěn)定、調(diào)理、脫水、干燥、焚燒等,傳統(tǒng)的處置方法有填埋、土地利用和建筑材料綜合利用。隨著環(huán)境標(biāo)準(zhǔn)的越來(lái)越嚴(yán)格和污泥傳統(tǒng)處理與處置方法弊端的逐漸顯現(xiàn),亟需找到新的處理與處置方法。鋅電鍍污泥是鋅電鍍行業(yè)中經(jīng)廢水處理后含重金屬的污泥廢棄物,作為一種危險(xiǎn)廢棄物,采取有效方式,實(shí)現(xiàn)電鍍污泥的減量化、無(wú)害化和資源化一直是國(guó)內(nèi)外學(xué)者研究的熱點(diǎn)。從污水污泥和鋅電鍍污泥資源化及以廢治廢思路出發(fā),本論文探究了污泥活性炭、鋅電鍍污泥催化劑和污泥活性炭負(fù)載鋅電鍍污泥催化劑對(duì)亞甲基藍(lán)的去除可行性。研究得到的主要結(jié)論如下:(1)污泥活性炭對(duì)亞甲基藍(lán)具有吸附去除能力。實(shí)驗(yàn)通過(guò)吸附熱力學(xué)、動(dòng)力學(xué)和材料再生性,探討污泥活性炭對(duì)亞甲基藍(lán)的最佳吸附去除條件。結(jié)果發(fā)現(xiàn):污泥活性炭處理濃度為100 mg/L的亞甲基藍(lán)時(shí),最佳投加量和最佳吸附溫度分別為6.0 g/L和35 oC;低溶液p H值不利于吸附;吸附達(dá)到平衡所需時(shí)間、平衡吸附量與溶液初始濃度具有一定關(guān)系,隨初始濃度的升高,平衡所需時(shí)間增長(zhǎng),平衡吸附量增加;20 oC時(shí),污泥活性炭吸附亞甲基藍(lán)的飽和吸附量為26.15 mg/g,等溫吸附線(xiàn)符合Langmuir吸附模型,亞甲基藍(lán)在活性炭表面以單分子層吸附為主;污泥活性炭吸附亞甲基藍(lán)的動(dòng)力學(xué)模型符合準(zhǔn)二級(jí)動(dòng)力學(xué)模型;污泥活性炭吸附飽和后,通過(guò)熱處理的再生效率較高,三次再生效率保持在86.0%。(2)鋅電鍍污泥衍生材料對(duì)亞甲基藍(lán)具有紫外光催化能力。實(shí)驗(yàn)通過(guò)不同處理方法制備了多種鋅電鍍污泥催化劑,包括煅燒鋅電鍍污泥催化劑、酸浸電鍍污泥催化劑以及負(fù)載酸浸電鍍污泥催化劑,并考察比較了它們對(duì)亞甲基藍(lán)的紫外光催化降解能力,結(jié)果發(fā)現(xiàn):煅燒鋅電鍍污泥2 h紫外光催化降解亞甲基藍(lán)的脫色率不到2%,基本無(wú)光催化活性;通過(guò)調(diào)整鋅污泥組分形態(tài),制備出具有一定光催化降解亞甲基藍(lán)活性的酸浸電鍍污泥催化劑和負(fù)載酸浸電鍍污泥催化劑,且負(fù)載酸浸電鍍污泥催化劑的活性更高,2 h的紫外光催化亞甲基藍(lán)脫色率為11.3%,對(duì)應(yīng)脫色量為2.825mg/g。(3)污泥活性炭負(fù)載鋅電鍍污泥催化劑對(duì)亞甲基藍(lán)具有良好的紫外光芬頓降解能力。煅燒電鍍污泥具有良好的光芬頓活性。在0.4 g煅燒鋅電鍍污泥、2 mmol/L H2O2以及11 W紫外燈條件下,催化降解500 m L、50 mg/L的亞甲基藍(lán),2 h可以取得85.13%的脫色率,COD去除率為70.33%。通過(guò)形態(tài)研究發(fā)現(xiàn),煅燒電鍍污泥的主要組分是Zn Fe2O4;當(dāng)污水污泥和煅燒電鍍污泥以1:1混合時(shí),制得復(fù)合催化劑的光芬頓活性最高。在0.4 g污泥活性炭負(fù)載電鍍污泥催化劑、2 mmol/L H2O2以及11 W紫外燈條件下,催化降解500 m L、50 mg/L的亞甲基藍(lán),2 h可以取得86.26%的脫色率,脫色量為53.91 mg/g,且COD去除率為80.54%,高于相同條件下的煅燒電鍍污泥。污泥活性炭負(fù)載電鍍污泥實(shí)現(xiàn)了污水污泥和鋅電鍍污泥的共同資源化,通過(guò)結(jié)合提升了光芬頓降解能力,實(shí)現(xiàn)了亞甲基藍(lán)等印染廢水的有效去除。
[Abstract]:With the rapid development of printing and dyeing industry, printing and dyeing printing and dyeing wastewater generated in the process of the formation of environmental pollution, is an important Chinese contradiction to be solved at present. The city sewage sludge is a by-product of the wastewater treatment system, containing a large amount of toxic and harmful substances, such as persistent organic pollutants and heavy metals. Traditional sludge treatment methods have concentrated and stable, conditioning, dewatering, drying, incineration, landfill disposal of the traditional method, the comprehensive utilization of land use and building materials. With the gradually more and more strict environmental standards and traditional sludge treatment and disposal methods of disadvantages, need to find a new method of treatment and disposal of sludge. Zinc electroplating sludge is the waste zinc in electroplating industry the treated wastewater containing heavy metals, as a kind of hazardous waste, take effective measures to achieve the electroplating sludge reduction, harmless and resource has been at home and abroad Hot research. From sewage sludge and zinc electroplating sludge and bywaste perspective, this paper explores the sludge activated carbon, zinc electroplating sludge catalyst on removal of methylene blue supported zinc electroplating sludge catalyst and feasibility of sludge activated carbon. The main conclusions are as follows: (1) the sludge with activated carbon the adsorption ability of methylene blue. The adsorption thermodynamics, kinetics and regeneration of materials, to explore the best conditions on the removal of sludge activated carbon adsorption of methylene blue. The results showed that the sludge activated carbon concentration of 100 mg/L methylene blue, optimal dosage and adsorption temperature were 6 g/L and 35 oC low; P solution H value is not conducive to adsorption; the adsorption equilibrium time required, there is a certain relation between the adsorption capacity and the initial concentration of the solution, with the increase of the initial concentration, the time needed to balance growth. The amount of increase; 20 oC, saturated adsorption capacity of sludge activated carbon adsorption of methylene blue was 26.15 mg/g, the adsorption isotherm accords with Langmuir adsorption model and methylene blue on the surface of activated carbon with single molecule layer adsorption kinetics model; sludge activated carbon adsorption of methylene blue with the pseudo two order kinetics model; sludge activated carbon adsorption after the high regeneration efficiency of heat treatment, the three regeneration efficiency is maintained at 86.0%. (2) zinc electroplating sludge derived materials with UV catalytic ability of methylene blue. The experimental preparation of various zinc electroplating sludge catalysts by different processing methods, including calcination of zinc electroplating sludge catalyst, catalyst leaching and acid leaching of electroplating sludge from electroplating sludge catalyst the load and the effects of acid, compared their ability of photocatalytic degradation of methylene blue was found: Calcined zinc electroplating sludge 2 h UV catalytic degradation of Methylene blue decolorization rate of less than 2%, basically no photocatalytic activity; by adjusting the zinc sludge composition form, prepared with the photocatalytic degradation of methylene blue active acid leaching of electroplating sludge catalyst and catalyst acid leaching of electroplating sludge, and the load of acid leaching of electroplating sludge catalyst with higher activity, 2 h UV light photocatalyticdegradation of methylene blue decolorization rate was 11.3%, the corresponding decolorization amount was 2.825mg/g. (3) zinc electroplating sludge catalyst has good UV Fenton degradation ability of methylene blue on sludge activated carbon calcination of electroplating sludge with light load. Fenton lived well. In 0.4 g calcined zinc electroplating sludge, 2 mmol/L H2O2 and 11 W UV light conditions under the catalytic degradation of 500 m L, 50 mg/L, 2 h of methylene blue, you can get 85.13% decolorization rate, COD removal rate of 70.33%. by morphological study found that the main group of electroplating sludge is calcined Zn Fe2O4; when the sewage pollution The mud and calcination of electroplating sludge mixed with 1:1, Fenton prepared the highest activity of composite catalyst. The catalyst activity in the electroplating sludge load of 0.4 g H2O2 and 2 mmol/L sludge carbon, 11 W UV lamp under the condition of catalytic degradation of 500 m L, 50 mg/L, 2 h of methylene blue, you can get 86.26% decolorization rate, the decolorization rate was 53.91 mg/g, and the removal rate of COD was 80.54%, higher than the calcination of electroplating sludge under the same conditions. The recycling of sewage sludge and zinc electroplating sludge load of electroplating sludge sludge activated carbon, by combining the improved Fenton light degradation capability, can effectively remove methylene blue dyeing wastewater.

【學(xué)位授予單位】：上海大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X703;X791

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本文編號(hào)：1553989