摘要
采用生物浸出法处理铜砷滤饼废渣,考察了pH值、温度和菌种对浸出效果的影响,分析了铁氧化菌浸出机理和将生物浸出用于含砷废渣无害化处理的可行性.结果表明,微生物对铜砷滤饼浸出起促进作用,热酸预处理后在50℃、pH值为1.5的条件下,以中度嗜热西伯利亚硫杆菌(Sulfobacillus sibiricu)浸出7 d,砷浸出率达91.33%,铜浸出率达94.22%.
Bioleaching was used to treat Cu-As-containing filter cake. The effects of pH value, temperature and strain on the bioleaching rates of Cu and As were studied, and the bioleaching mechanism and feasibility of the harmless treatment of As-bearing residue with bioleaching analyzed. The results show that Sulfobacillus sibiricu enhanced the leaching process. The leaching of As and Cu was carried out by hot acid and then leaching with bacterial suspension, the optimum conditions with the strain were obtained as： temperature of 50℃ and pH value 1.5. Under the optimum conditions, the leaching rate of As and Cu reached 91.33% and 94.22% in 7 d, respectively.
出处
《过程工程学报》
CAS
CSCD
北大核心
2014年第3期415-420,共6页
The Chinese Journal of Process Engineering
基金
国家重点基础研究发展规划(973)基金资助项目(编号:2010CB630904)
国家自然科学基金资助项目(编号:51174185)
国家高技术研究发展计划(863)基金资助项目(编号:2011AA060704)
关键词
铜砷滤饼
生物浸出
砷
铜
西伯利亚硫杆菌
Cu-As-containing filter cake
bioleaching
arsenic
copper
Sulfobacillus sibiricu
