發(fā)布時(shí)間：2018-05-30 13:58

  本文選題：高泥化煤泥水 + 金屬陽離子��； 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：煤泥水處理是選煤廠極其重要的作業(yè)環(huán)節(jié),由于煤泥水溶液含有大量的黏土微細(xì)礦物顆粒且顆粒表面荷負(fù)電荷,這致使高泥化煤泥水的沉降澄清十分困難。研究不同陽離子在煤泥顆粒表面的吸附特性,為煤泥水處理藥劑選擇提供依據(jù),具有較好的理論意義和實(shí)踐價(jià)值。 采用單因素條件試驗(yàn)法,考察了不同陽離子種類及用量、攪拌時(shí)間、礦漿pH值等因素對(duì)不同陽離子在煤泥顆粒表面吸附特性的影響規(guī)律,對(duì)不同陽離子的吸附動(dòng)力學(xué)進(jìn)行了研究,分析了金屬陽離子在煤泥顆粒表面的吸附特性及機(jī)理。 研究結(jié)果表明：煤泥顆粒對(duì)K+、Na+、Ca2+、Mg2+四種陽離子的吸附量隨著時(shí)間延長(zhǎng)都有所增加并趨于吸附平衡,吸附平衡時(shí)間約為30min；隨著離子濃度增大,煤泥顆粒對(duì)陽離子的吸附量增加,離子濃度低時(shí)增加比較明顯。煤泥顆粒對(duì)陽離子的吸附順序?yàn)镵+Na+,Ca2+Mg2+；對(duì)于K+、Na',當(dāng)pH7.3時(shí),隨著pH的增大,吸附量逐漸增大,當(dāng)pH7.3時(shí),吸附量明顯減小。Ca2+、Mg2+在pH9.4時(shí),吸附量逐漸增加,且當(dāng)7.5pH9.4時(shí),有明顯增加,當(dāng)pH增大到9.4以上,吸附量呈下降趨勢(shì),煤泥水的弱堿性溶液化學(xué)環(huán)境對(duì)陽離子的吸附是有利的；K+、Na+兩種一價(jià)陽離子在煤泥表面的吸附符合Lagergren(拉格爾格倫)準(zhǔn)一級(jí)動(dòng)力學(xué)方程,Ca2+、Mg2+兩種二價(jià)陽離子在煤泥表面的吸附符合Lagegren(拉格爾格倫)準(zhǔn)二級(jí)動(dòng)力學(xué)方程。
[Abstract]:Coal slime water treatment is an extremely important working link in coal preparation plant. Due to the large amount of clay fine mineral particles and negative charge on the surface of the particles, it is very difficult to clarify the settlement of high muddy slime water. The study of adsorption characteristics of different cations on the surface of coal slime particles provides a basis for the selection of slurry water treatment agents, which has good theoretical significance and practical value. The effects of different cations species and dosage, stirring time and slurry pH value on the adsorption characteristics of different cations on the surface of coal slime particles were investigated by single factor conditional test. The adsorption kinetics of different cations was studied, and the adsorption characteristics and mechanism of metal cations on the surface of coal slime particles were analyzed. The results show that the adsorption capacity of the four kinds of cations K ~ (2 +) Na ~ (2 +) Ca ~ (2 +) Ca ~ (2 +) mg _ (2) increases with the prolongation of time, and the adsorption equilibrium time is about 30 min, and the adsorption amount of cations increases with the increase of ion concentration. The increase of ion concentration is obvious when the ion concentration is low. The order of adsorption of cations by coal slime particles is K Na Na + Ca 2 + Mg2, for K Na Na Na O, when pH7.3 increases, the adsorption capacity increases with the increase of pH, and when pH7.3, the adsorption capacity decreases obviously. Ca 2 + mg 2 increases when pH9.4, and when 7.5pH9.4 increases, the adsorption capacity of K Na + Na + Ca 2 + increases with the increase of pH value. When pH increased above 9.4, the adsorption capacity decreased. The adsorption of cations in the chemical environment of weak alkaline solution of coal slime water is favorable. The adsorption of two monovalent cations on the slime surface accords with Lagergren's quasi first-order kinetic equation and Ca ~ (2 +) / mg _ (2) divalent cations on the coal slime. The adsorption of the surface is in accordance with the Lagegren (Raggren) quasi second order kinetic equation.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：O647.31;TD94

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張志軍;劉炯天;馮莉;鄒文杰;;基于Langmuir理論的平衡吸附量預(yù)測(cè)模型[J];東北大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年05期

2 曾貽善，，姜士軍;金在黃鐵礦表面沉淀機(jī)理的實(shí)驗(yàn)研究[J];地質(zhì)科學(xué);1996年01期

3 李亞峰,趙紅;石灰、電石渣及CaCl_2處理煤泥水對(duì)比試驗(yàn)研究[J];礦業(yè)安全與環(huán)保;2000年02期

4 熊祖江;李小寧;賈清秀;付中玉;楊中開;;PA6/CaCl_2復(fù)合物的絡(luò)合機(jī)理研究[J];高分子學(xué)報(bào);2010年08期

5 ;Determination of the solvation film thickness of dispersed particles with the method of Einstein viscosity equation[J];Journal of University of Science and Technology Beijing(English Edition);2005年04期

6 高晶 ,鄭惠 ,陳艷美 ,于淼;金屬陽離子水解趨勢(shì)的研究[J];長(zhǎng)春師范學(xué)院學(xué)報(bào);1995年06期

7 劉毅;氯化銨交換液EDTA法測(cè)定膨潤(rùn)土中的鈣、鎂[J];廣西化工;1993年04期

8 張慎軍;張覃;張碧發(fā);郭勇;周忠萍;李先海;;碳酸鉀作為煤泥沉降凝聚劑的試驗(yàn)研究[J];化工礦物與加工;2011年10期

9 李亞峰,蘇永渤;石灰在煤泥水混凝中的作用機(jī)理研究[J];環(huán)境工程;1999年01期

10 欒兆坤;鋁的水化學(xué)反應(yīng)及其形態(tài)組成[J];環(huán)境科學(xué)叢刊;1987年02期

本文編號(hào)：1955549