MICROBIAL-DEGRADATION OF METAL COMPLEXED CYANIDES AND THIOCYANATE FROM MINING WASTEWATERS

被引:54
作者
BOUCABEILLE, C
BORIES, A
OLLIVIER, P
MICHEL, G
机构
[1] FAC SCI PHARMACEUT TOULOUSE,MICROBIOL IND & VIROL LAB,F-31000 TOULOUSE,FRANCE
[2] BUR RECH GEOL & MIN,F-45060 ORLEANS 2,FRANCE
关键词
D O I
10.1016/0269-7491(94)90071-X
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A microbiological examination of the soil from a cyanide wastewater storage basin was carried out. The storage basin contained water from the cyanidation process of gold extraction, and it was composed principally of simple cyanide, metal complexed cyanide, mainly cuprocyanide, ferro-ferricyanides and thiocyanate. Pseudomonas species were the principal bacteria identified in the soil. Using the storage basin soil as a seed sludge, its potential for the biodegradation of all the cyanide complexes in the mining wastewater was studied in the laboratory, using batch, fed-batch and continuous processes. The ammonia and sulphate produced were quantified. The presence of intermediate products was suspected In the continuous process, total degradation of all cyanide was observed at a dilution rate of 0.066 day(-1).
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页码:59 / 67
页数:9
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