外加电场强化Acidithiobacillusferrooxidans生物氧化黄铁矿过程研究

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关键词：生物氧化;Acidithiobacillusferrooxidans；黄铁矿；微生物电化学反应器；电化学中图分类号：Q89 文献标志码：A DOI：10.3969/j.issn.1003-9015.2025.03.00

Abstract：Inorder to enhance the process eficiency of metallurgical microbial oxidationof pyrite，this experiment designed and constructedan external electric field microbial electroreactor system，and studied the process characteristicsofpyritebiooxidationbyAcidithiobacillus ferrooxidansunderexteral electricfieldconditions.Itmainlyincludes ironoxidation efficiency，structure and biomass of microbial biofilm，secretionand compositionof extracelular polymers，and related electrochemical properties.The results showthat under the actionof asuitable external electric field，theironoxidationabilityofthebacteria isslightlyenhanced，andthepyriteoxidationamountincreases by 21.3%；the biofilm structure onthe surface of pyrite is more compact，the biomass increases significantly，and the total bacterial volume increases by O.9 times compared with the control group.During the biooxidation process，， the current of the pyrite biooxidationsystem gradually increases，andthe processresistance gradually decreases.The research results propose an effective means to increase the biomassof metallurgical microrganisms， which will provide certain support for the development of industrialized bioleaching technology.

Key words：biological oxidation；Acidithiobacillus ferrooxidans；pyrite；microbial electroreactor； electrochemistry

1前言

在诸多冶金微生物中，嗜酸氧化亚铁硫杆菌（Acidithiobacillus ferrooxidans，后文简写为A.ferrooxi-dans）是最早得到产业化应用的菌株。（剩余12143字）