基于Acidithiobacillus ferrooxidans介导的共沉淀对酸性体系中重金属的固定（英文）

发布时间：2018-05-29 02:37

本文选题：共沉淀 + 嗜酸氧化亚铁硫杆菌　；参考：《Transactions of Nonferrous Metals Society of China》2017年05期

【摘要】：研究Acidithiobacillus ferrooxidans对酸性水体中复合重金属共沉淀过程的促进作用。A.ferrooxidans显著地提高了共沉淀体系中Fe(II)离子的氧化速率及硫酸羟基铁氧体的形成。在A.ferrooxidans存在的条件下Cu(II)浓度降低至0.058 mmol/L,而Cd在生物体系中浓度降至最低0.085 mmol/L。Pb主要以铅矾形式沉淀,硫酸羟基铁氧体促进了残余铅离子的沉淀。通过XRD、SEM和FTIR等技术对形成产物进行系统表征。共沉淀体系中主要的组分为高结晶度的黄钾铁矾,而A.ferrooxidans促进施式矿物在一价阳离子缺乏的反应后期形成。A.ferrooxidans存在体系中较高的Fe(II)离子氧化速率和Fe(III)离子供应速度有利于多面体晶体形成及其晶粒尺径增加。复合重金属离子进入硫酸羟基铁氧体的晶体结构,通过A.ferrooxidans介导的共沉淀能够高效地将重金属离子从酸性废水中去除。
[Abstract]:The effect of Acidithiobacillus ferrooxidans on the coprecipitation process of complex heavy metals in acidic water was studied. A. Ferrooxidans significantly increased the oxidation rate and the formation of hydroxyl ferrite in the coprecipitation system. In the presence of A.ferrooxidans, the concentration of Cu II decreased to 0.058 mmol / L, while the concentration of CD decreased to a minimum of 0.085 mmol/L.Pb in the biological system, mainly precipitated in the form of lead alum, and the hydroxyl ferrite sulfate promoted the precipitation of residual lead ions. The products were systematically characterized by FTIR and XRD. The main components in the coprecipitation system are high crystallinity of jarosite. The higher oxidation rate of Fe _ (2) I ~ (2 +) and the faster supply rate of Fe ~ (2 +) I ~ (2 +) are favorable to the formation of polyhedron crystal and the increase of grain size in the presence system of A. Ferrooxidans, which is promoted by A.ferrooxidans. The complex heavy metal ions enter the crystal structure of hydroxyl ferrite sulfate, and the heavy metal ions can be effectively removed from acid wastewater by A.ferrooxidans mediated coprecipitation.
【作者单位】：中南大学资源加工与生物工程学院;
【基金】：Project(51174239)supported by the National Natural Science Foundation of China Project supported by the Shanghai Tongji Gao Tingyao Environment Protection Science&Technology Development Foundation,China Project supported by the Hunan Provincial Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources,China Project(2017M610506)supported by Postdoctoral Foundation for MG from Chinese PD Science Foundation,China Project(185690)supported by PD Research Funding Plan in Hunan and Central South University,China
【分类号】：X703

【相似文献】