本文關(guān)鍵詞： 高爐渣 吸附 重金屬離子 動力學 熱力學　出處：《內(nèi)蒙古科技大學》2015年碩士論文　論文類型：學位論文

【摘要】：高爐渣是煉鐵工藝過程中產(chǎn)生的廢物，由于高爐渣巨大的產(chǎn)生量和其相關(guān)的處理成本，用高爐渣作為吸附劑應(yīng)用到重金屬廢水處理中是非常有必要的。本文采用高爐渣作為吸附劑，將高爐渣用去離子水洗滌后烘干，再用球磨機磨碎，最后用分樣篩進行分篩，用掃描電子顯微鏡（SEM）、比表面積分析儀（BET）、紅外光譜儀(FTIR)、高分辨單道掃描等離子光譜儀（ICP）等儀器對其進行材料表征。研究了影響因素（高爐渣投加量、時間、溫度、pH值和溶液濃度）對Cu2+、Cd2+、Zn2+吸附的效果的影響，再采用正交試驗法確定其吸附Cu2+、Cd2+、Zn2+的最佳工藝條件，，又進行了高爐渣對Cu2+、Cd2+、Zn2+三種金屬離子的競爭試驗，最后研究了高爐渣吸附Cu2+、Cd2+、Zn2+的機理，研究結(jié)果如下： （1）通過高爐渣吸附Cu2+、Cd2+、Zn2+的單因素試驗研究，得出高爐渣能夠很好地吸附Cu2+、Cd2+、Zn2+，去除率均可達到99%。由正交試驗得出，影響高爐渣吸附Cu2+的主要因素為溫度，其次為振蕩時間，然后為高爐渣投加量，最后為pH值；影響高爐渣吸附Cd2+的主要因素為pH值，其次為溫度，然后為高爐渣投加量，最后為振蕩時間；影響高爐渣吸附Zn2+的主要因素為溶液pH值，其次是高爐渣投加量，然后為溫度，最后為振蕩時間。 （2）由競爭吸附試驗得出，Cu2+、Cd2+、Zn2+在高爐渣上的吸附行為是相互抑制的，高爐渣對Cu2+、Cd2+、Zn2+三種金屬離子的吸附選擇順序為Cu2+＞Cd2+＞Zn2+。 （3）由機理試驗可以得出，Cu2+、Cd2+、Zn2+三種金屬離子在高爐渣上吸附的顆粒內(nèi)擴散過程為主要的控制過程，吸附形式符合單分子層吸附形式，吸附過程是自發(fā)的、吸熱的、熵增的、物理吸附過程并且是很容易進行的，主要參加的力是氫鍵力和偶極間作用力。 以上結(jié)果表明，高爐渣作為一種吸附劑應(yīng)用于重金屬廢水處理中，對重金屬離子有很好的吸附性能。
[Abstract]:Blast furnace slag is the waste produced in the process of ironmaking, because of the huge production of blast furnace slag and its related treatment cost. It is very necessary to use blast furnace slag as adsorbent in heavy metal wastewater treatment. In this paper, the blast furnace slag is used as adsorbent, the blast furnace slag is washed with deionized water and dried, and then ground by ball mill. At last, sample sieve was used to screen, scanning electron microscope (SEM), specific surface area analyzer (BET), FTIR (FTIR). The Cu2 was characterized by high-resolution single-channel scanning plasma spectrometer and other instruments. The influence factors (blast furnace slag dosage, time, temperature, pH value and solution concentration) on Cu2 were studied. The effect of Cd2 Zn-2 adsorption on the adsorption of Zn2 was studied. The optimum process conditions for the adsorption of Cu2 CD2 + Zn2 were determined by orthogonal test, and the blast furnace slag was used to treat Cu2. The mechanism of adsorption of Cu2 ~ (2 +) ~ (2 +) ~ (2 +) Zn ~ (2 +) by blast furnace slag was studied. The results are as follows: 1) the single factor experimental study on the adsorption of Cu2 ~ (2 +) CD _ (2) O ~ (2 +) Zn _ (2) by blast furnace slag shows that the slag can adsorb Cu2 ~ (2 +) CD _ (2) ~ (2 +) Zn _ (2). The results of orthogonal test show that the main factors affecting the adsorption of Cu2 by blast furnace slag are temperature, oscillation time, adding amount of slag, and pH value. The main factors affecting the adsorption of Cd2 by blast furnace slag are pH value, temperature, adding amount of blast furnace slag, and oscillating time. The main factors affecting the adsorption of Zn2 by blast furnace slag are the pH value of solution, the dosage of blast furnace slag, the temperature and the oscillation time. (2) the adsorption behavior of Cu _ 2 / CD _ 2 ~ (2 +) Zn _ (2) on blast furnace slag is mutually inhibited by competitive adsorption test, and Cu2 ~ (2 +) CD _ (2) is adsorbed by blast furnace slag. The order of adsorption selection of three metal ions in Zn2 is Cu2 > Cd2 > Zn2. (3) from the mechanism test, it can be concluded that the diffusion process of three kinds of metal ions adsorbed on blast furnace slag is the main controlling process. The adsorption process is spontaneous, endothermic, entropy increasing, physical adsorption process is easy and the main force is hydrogen bond force and dipole interaction force, the adsorption form is in line with the monolayer adsorption form, and the adsorption process is spontaneous, endothermic, entropy increasing, and physical adsorption process is easy. The results show that the blast furnace slag as an adsorbent for heavy metal wastewater treatment has good adsorption performance for heavy metal ions.
【學位授予單位】：內(nèi)蒙古科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X757

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