本文關鍵詞： 陽離子 嗜酸氧化亞鐵硫桿菌 菌種活性 影響規(guī)律　出處：《稀有金屬》2016年05期 　論文類型：期刊論文

【摘要】：以嗜酸氧化亞鐵硫桿菌(Acidthiobacillus ferrooxidans,At.f,FN811931)為研究對象,研究了脈石礦物溶出陽離子(K~+,Mg~(2+),Ca~(2+)和Al~(3+))對At.f菌氧化活性的影響。研究結果表明:不同陽離子對At.f菌氧化活性的影響效應不同,其影響由大到小的順序依次為Mg~(2+),Al~(3+),K+,Ca~(2+),當Mg~(2+),Al~(3+),K~+濃度分別超過1,5,10 g·L~(-1)時顯著降低了At.f菌的氧化活性,而Ca~(2+)在所研究0~2 g·L~(-1)濃度范圍內對At.f菌氧化活性影響不大。培養(yǎng)25 h時,低濃度條件下(0.5 g·L~(-1)),K+,Ca~(2+),Al~(3+),Mg~(2+)作用下的Fe~(2+)的氧化率分別為67.78%,68.76%,65.27%,61.28%,均高于不添加任何離子作用下的Fe~(2+)的氧化率(60.74%);高濃度條件下(15 g·L~(-1)),K+,Al~(3+),Mg~(2+)作用下的Fe~(2+)的氧化率分別為35.82%,25.25%,21.47%,均低于不添加任何離子作用下的Fe~(2+)的氧化率。陽離子Mg~(2+),Al~(3+),K~+隨離子濃度的增加,Fe~(2+)的氧化率均呈現(xiàn)逐漸降低的趨勢。
[Abstract]:Acidthiobacillus ferrooxidans At.fn811931 was used as the research object. In this paper, the dissolution of cationic (K ~ + mg ~ (2)) from gangue minerals was studied. The effects of Ca~(2 and Al~(3 on the oxidation activity of At.f bacteria were studied. The results showed that the effect of different cations on the oxidation activity of At.f bacteria was different. The order of its influence from big to small is Mg~(2 / Altinium 3 / K / K ~ 2 / C, respectively, when the concentration of Mg~(2 is more than 1 ~ 5 / L. The order of the effect is as follows: (1) the order of the effect is as follows: (1) K ~ (+) ~ (3). (10 g 路L ~ (-1)) significantly decreased the oxidation activity of At.f. However, Ca~(2 had little effect on the oxidation activity of At.f in the concentration range of 0 ~ 2 g 路L ~ (-1). Under the condition of low concentration, 0. 5 g 路L ~ (-1) ~ (-1) ~ (1) ~ (1) ~ (1) ~ (?). The oxidation rate of Fe~(2 under the action of Mg~(2 was 67.78% and 68.76%, 65.27% and 61.28%, respectively. The oxidation rate of Fe~(2 was 60.74% higher than that of Fe~(2 without adding any ions. The oxidation rates of Fe~(2 under high concentration (15 g 路L ~ (-1)) are 35.82% and 25.25%, respectively. 21.47 the oxidation rate of Fe~(2 was lower than that of Fe~(2 without adding any ions. The oxidation rate of cationic Mg~(2 was increased with the increase of ion concentration. The oxidation rate of Fe~(2 decreased gradually.
【作者單位】： 北京科技大學土木與環(huán)境工程學院金屬礦山高效開采與安全教育部重點實驗室;
【基金】：國家自然科學基金青年基金項目(51204011) 中國博士后科學基金第六批特別資助項目(2013T60063) 北京市優(yōu)秀博士學位論文指導教師科技項目(20121000803)資助
【分類號】：TD925.5
【正文快照】： 氧化亞鐵硫桿菌是以氧化亞鐵離子、元素硫或還原態(tài)硫化合物獲取能量生長的嗜酸硫氧化菌,是常見的硫化礦浸出功能菌[1-2]。黃銅礦是自然界中最主要的銅礦物,也是最難浸出的礦物之一[3]。絹云母、白云石、磷灰石以及螢石等是黃銅礦中常見的共伴生脈石礦物,細菌氧化浸出時其溶出，

本文編號：1470654