本文關(guān)鍵詞：黑曲霉發(fā)酵菌渣對(duì)臧紅T的吸附研究　出處：《生物技術(shù)通報(bào)》2017年10期 　論文類型：期刊論文

  更多相關(guān)文章： 黑曲霉菌渣 吸附 臧紅T 動(dòng)力學(xué) 等溫吸附

【摘要】：將糖化酶發(fā)酵生產(chǎn)過程中產(chǎn)生的黑曲霉菌渣作為一種復(fù)合吸附劑進(jìn)行了染料吸附研究,以挖掘其吸附潛力。首先對(duì)菌渣的理化性質(zhì)進(jìn)行了分析,然后以臧紅T為模型染料,考察了幾種因素(接觸時(shí)間、溶液溫度、吸附劑量、初始濃度和鹽離子)對(duì)吸附的影響,并將所得數(shù)據(jù)用等溫吸附方程、動(dòng)力學(xué)方程和熱力學(xué)方程進(jìn)行了模型擬和。結(jié)果表明,吸附可在2 h內(nèi)達(dá)到平衡,吸附過程符合準(zhǔn)二級(jí)動(dòng)力學(xué)模型,屬于化學(xué)吸附,膜擴(kuò)散模型比內(nèi)擴(kuò)散模型更適合解釋吸附行為;溫度對(duì)吸附有促進(jìn)作用,吸附過程是一個(gè)自發(fā)的吸熱反應(yīng);通過Langmuir方程可計(jì)算出最大單分子層吸附容量為166.67 mg/g,但Freundlich能更好的描述吸附行為,說明菌渣表面存在多個(gè)不同的吸附位點(diǎn)。此外,菌渣投加量和鈉離子濃度均可影響吸附效果,染料去除率最高可達(dá)91%。
[Abstract]:Aspergillus niger glucoamylase will produce fermentation in the production process as a kind of composite adsorbent was studied by dye adsorption, the adsorption potential of mining. First on physicochemical properties of mushroom residue were analyzed, and then the red T dye Zang model, the influences of some factors (contact time, temperature of the solution. Adsorption dosage, initial concentration and salt ion) on the adsorption, and the resulting data with the isothermal adsorption equations, dynamic equations and thermodynamic equations of model fitting. The results showed that the adsorption reached equilibrium within 2 h, the adsorption process accords with the quasi two level dynamic model, which belongs to chemical adsorption, membrane diffusion model more than to explain the adsorption diffusion model; temperature has a promoting effect on the adsorption, the adsorption process is a spontaneous endothermic reaction; the Langmuir equation can calculate the maximum adsorption capacity of 166.67 mg/g, but Freundlich A better description of adsorption behavior indicates that there are many different adsorption sites on the surface of bacteria residue. In addition, the amount of sludge residue and sodium ion can all affect the adsorption effect, and the dye removal rate is up to 91%..

【作者單位】： 黃淮學(xué)院生物與食品工程學(xué)院;河南仰韶生化工程有限公司;南京農(nóng)業(yè)大學(xué)資源與環(huán)境學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51503074)
【分類號(hào)】：O647.3;X703
【正文快照】： 隨著人類社會(huì)的發(fā)展,工業(yè)化進(jìn)程日益加快,環(huán)境污染也日趨嚴(yán)重。生命過程離不開水源,水體污染是環(huán)境污染中最為值得關(guān)注的一個(gè)方面,其主要污染物有無機(jī)金屬離子和有機(jī)化合物,如染料分子[1]。染料廣泛應(yīng)用于多個(gè)領(lǐng)域,廢水排放量非常巨大,且多數(shù)染料化學(xué)結(jié)構(gòu)復(fù)雜、難降解、具有一

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