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利用氧化亚铁硫杆菌的固定化技术,以碳毡为载体建立固定化反应床,常温下,在初始pH分别为4.60和4.90的培养基A和B中,分别合成黄铁矾和施氏矿物,借助扫描电子显微镜(SEM),X-射线衍射仪(XRD)和傅里叶红外光谱(FTIR)等方法对矿物的形貌特征,化学组分和结构进行了分析与表征。实验结果表明,固定化颗粒能够在4天内将培养基A中的Fe2+完全氧化,相对于对照组更好地促进了矿物的合成,合成的黄铁矾为铵黄铁矾和黄钾铁矾,其晶体粒径均匀,分散性好,晶体表面覆盖有均匀的施氏矿物;在5天内培养基B中的Fe2+被固定化颗粒完全氧化,同时合成的施氏矿物比较纯净,网状结构良好。同时,多周期的连续反应实验表明固定化颗粒在培养基A和B中能够长期稳定地保持生物活性。
The immobilization technology of Thiobacillus ferrooxidans was used to immobilize the reaction bed with carbon felt as a carrier. Under normal temperature, the media A and B with the initial pH values of 4.60 and 4.90 respectively were used to synthesize the anatase The morphology, chemical composition and structure of the minerals were analyzed and characterized by SEM, XRD and FTIR. The experimental results showed that the immobilized particles could completely oxidize Fe2 + in medium A within 4 days, and promoted the synthesis of minerals better than the control group. The synthesized anthobasic ammonium was ammonium jarosite and jarosite, Its crystal size is uniform and its dispersibility is good. The crystal surface is covered with uniform Shihsite mineral. The Fe2 + in medium B is completely oxidized by the immobilized particles in 5 days, and the Shihsite mineral is relatively pure and the network structure is good. Meanwhile, multi-cycle continuous reaction experiments showed that the immobilized particles in the medium A and B in the long-term stable biological activity.