摘要
汞是煤炭中有毒的重金属元素之一,如何脱除煤中汞是煤炭清洁高效利用研究领域难点。为探索煤中汞的最优浸出条件,以贵州老鹰山高汞煤为研究对象,采用从该地区土壤中筛选分离对煤中汞有浸出作用的菌株M-3(经分子生物学鉴定为Aspergillus flavus M-3),通过响应面方法对菌株M-3浸出煤中汞的影响因素和浸出条件进行筛选和优化。试验结果表明:煤添加量、表面活性剂和接种量为影响菌株M-3浸出汞的重要因素;当煤添加量为3 g、表面活性剂添加量为1 mL、接种量为10%时,汞的浸出效果最好,浸出率达到84.89%。利用生物法浸出煤中汞具有一定可行性,可以为煤炭清洁高效利用提供一定支持。
Mercury is one of the toxic metallic elements in coal.How to remove it from coal remains a knotty problem in the research work on clean and high-efficiency utilization of coal.In order to explore the optimal conditions for extraction of mercury from coal,the mercury-rich coal produced from Laoyingshan Coal Mine in Guizhou Province is taken as the object to explore by using the response surface method the influential factors involved in mercury extraction process with the use of M-3a kind of strain identified by molecular biology as Aspergillus flavus M-3 which is separated from the soil in the local area and can produce the intended mercury leaching effect.It is aimed to determine revealed by test results,the amount of coal added,dosage of surfactant and dose of innoculation are the main factors influencing the mercury extraction effect;and when the coal is added at an amount of 3 g with a dosage of surfactant of 1%and an innoculation dose of 10%,a best mercury extraction effect with a mercury extraction rate up to 84.8%can be obtained.It is suggests that there exists a certain feasibility to remove mercury from coal using bioleaching method.The test results may provide a technical support for clean and high-efficiency utilization of coal.
作者
张毅惠
王树婷
梅娟
刘铖
茅文庆
陶秀祥
何环
ZHANG Yihui;WANG Shuting;MEI Juan;LIU Cheng;MAO Wenqing;TAO Xiuxiang;HE Huan(School of Chemical Engineering and Technology,China University of Mining&Technology,Xuzhou 221116,China;State key Laboratory of Coal Processing&High-efficiency Clean utilization of Coal of MinistryofEducation,Xuzhou221116,China)
出处
《选煤技术》
CAS
2023年第1期38-45,共8页
Coal Preparation Technology
基金
江苏省大学生创新项目(202110290154Y)
徐州市重点研发计划项目(KC21137)。
关键词
高汞煤
生物浸出法
菌株M-3
响应面分析
浸出率
mercury-rich coal
bioleaching method
strain M-3
response surface analysis
extraction rate
