嗜酸性氧化亚铁硫杆菌对四川某铜矿选冶渣重金属的阻滞

为修复治理四川某选冶渣重金属污染，降低选冶渣中多重金属生物有效性，以嗜酸性氧化亚铁硫杆菌为菌种、四川某选冶渣为研究对象，研究嗜酸性氧化亚铁硫杆菌生长特性及其对选冶渣中多种重金属的阻滞效果。结果表明，当初始pH=2.0、接种量15%时，选冶渣中Fe、Zn、Cu、Pb生物有效性降低率分别为98.05%、0、0、100%；当初始pH=5.0、接种量5%时，选冶渣中Fe、Zn、Cu、Pb生物有效性降低率分别为93.03%、62.92%、56.44%、52.56%。采用嗜酸性氧化亚铁硫杆菌滞固该铜选冶矿中多重金属具有可行性，可为同类选冶渣修复治理提供借鉴。

Blockade of Acidithiobacillus Ferrooxidans on Heavy Metals in Slag of a Copper Mine in Sichuan

In order to restore and control the heavy metal pollution of a smelting slag in Sichuan, and reduce the bioavailability of multiple heavy metals in the smelting slag, the growth characteristics of Acidithiobacillus ferrooxidans and its blocking effect on heavy metals the smelting slag were studied applying Acidithiobacillus ferrooxidans as strain and the smelting slag as research object. The results show that when the initial pH value is 2.0 and the inoculum size is 15%, the reduction rate of bioavailability of Fe, Zn, Cu and Pb in smelting slag is 98.05%, 0, 0 and 100%, respectively. When the initial pH value is 5.0 and the inoculum size is 5%, the reduction rate of Fe, Zn, Cu and Pb bioavailability in smelting slag is 93.03%, 62.92%, 56.44% and 52.56%, respectively. It is feasible to use Acidithiobacillus ferrooxidans to retain heavy metals in a copper beneficiation mine in Sichuan, which can provide reference for the remediation of similar beneficiation slag.