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中文摘要：
引言随着微生物技术的发展及在矿物加工工程领域内的应用,生物浸矿技术越来越受到重视,国内外在这一领域的研究近年来突飞猛进,从浸矿用微生物的选育、
英文摘要：
The effects and toxicity mechanism of xanthate collectors（ethyl xanthate,isopropyl xanthate,butyl xanthate,isoamyl xanthate）on the activity of bacteria（i.e.,Acidithiobacillus ferrooxidans,LD-1）were investigated.It was shown that alcohols and CS2 produced by the reaction of xanthate collectors and sulfuric acid are toxic to LD-1 bacteria.This could decrease the oxidation activity of LD-1 bacteria.With increasing xanthate molecular weight,the absorption properties and permeability of alcohols on the surface of bacteria became increasingly stronger.So the inhibition effect of alcohols on LD-1 bacteria became more and more strong.With increasing carbon chain length,the amount of CS2 produced by the reaction of xanthate and sulfuric acid decreased gradually at the same dosage of xanthate.And so the inhibition effect of CS2 on LD-1 bacteria became more and more weak.Therefore,xanthate collectors with different lengths of carbon chain had different inhibition effects on LD-1 bacteria.
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