天然闪锌矿光催化协同Acidithiobacillus ferrooxidans生长及抑制自身分解作用实验研究  

Natural Sphalerite Photocatalysis on Acidithiobacillus Ferrooxidans Growth Stimulation and Its Decomposition Inhibitory Action

作　　者：王鑫[1] 鲁安怀[1] 李艳[1] 颜云花[1] 曾翠平[1] 丁竑瑞[1] 王长秋[1] 

机构地区：[1]北京大学地球与空间科学学院,北京100871

出　　处：《矿物学报》2011年第4期641-646,共6页Acta Mineralogica Sinica

基　　金：国家重点基础研究发展计划973项目(2007CB815602)

摘　　要：对天然闪锌矿光催化协同下的Acidithiobacillus ferrooxidans生长,以及此过程中天然闪锌矿的光催化作用对其自身分解的影响进行了研究。结果表明,天然闪锌矿的光催化作用能够将光能以电子的形式转移给A.ferrooxidans并且促进了其生长,这一过程以Fe2+/Fe3+这一氧化还原对作为媒介;有光照组的A.ferrooxidans细胞浓度达到了8×108 cell/mL,而无光照和体系无电流的2组对照组A.ferrooxidans细胞浓度分别为6×108 cell/mL和4.95×108 cell/mL。通过电感耦合等离子体发射光谱仪测定3组不同条件实验体系中Zn2+的溶出量可以发现,在光照条件下Zn2+的溶出量只有3.5×10-6,而无光照条件下Zn2+溶出量达到了5×10-6。天然闪锌矿光催化作用一方面可以促进A.ferrooxidans的生长,另一方面也能够抑制其自身的分解和金属离子向水体中的释放。研究结果为酸性矿山废水地区抑制硫化物矿物溶蚀提供了新的思路。In this paper,how natural sphalerite stimulated Acidithiobacillus ferrooxidans growth and its decomposition inhibitory action were studied.The result showed that natural sphalerite photocatalysis could support the growth of A.ferrooxidans by means of providing electron energy through the Fe3＋/Fe2＋ mediation.In the experiment with photocatalysis,the final cell concentration of A.ferrooxidans was 8×108 cell/mL while in the control without photocatalysis and open circuit the A.ferrooxidans concentrations were only 6×108 cell/mL and 4.95×108 cell/mL,respectively.At the same time,the Zn2＋ concentration in the photocatalysis chamber was also measured using Inductive Coupled Plasma Emission Spectrometer.With the photocatalysis,only about 3.5×10-6 of zinc dissolved while 5×10-6 dissolved in the experiment without photocatalysis.The results indicated that besides its stimulation of A.ferrooxidans growth,natural sphalerite photocatalysis also prevented itself decomposition and inhibited the metal ion releasing to the natural water.

关 键 词：天然闪锌矿 嗜酸性氧化亚铁硫杆菌 光催化 矿物分解 

分 类 号：O6-4[理学—化学]