摘要
针对中国亲煤(煤系)砂岩型铀矿床成矿过程,以不同氧化程度的低煤级煤为研究对象,采用分光光度法研究煤对铀酰离子的吸附络合作用。结果表明,煤对铀酰离子(UO22+)的吸附作用受煤氧化程度、煤种、溶液pH值、环境温度和铀溶液初始浓度等因素影响。脱附实验和红外光谱分析进一步证明,煤中活性官能团与铀酰离子发生了明显的化学吸附/络合作用。基于上述结果,提出了亲煤型砂岩铀矿的成矿过程,为揭示煤与铀矿共伴生关系提供了基础数据。
According to the ore-forming process of sand-type uranium ore associated coal measures, the adsorbing and complexing effects between low-rank coal of different oxidation degree and uranyl ion were studied by spec- trophotometry in this paper. The results showed that the adsorbing effects were affected by many factors, such as coal oxidation degree, coal type, pH value of solution, environmental temperature and initial concentration of uranyl ion. The desorption experiment and FTIR analysis further demonstrated that the active functional groups in coal reacted with uranyl ions, and formed complexing and chemistry adsorption. Based on the above results, a new ore-forming process of sand-type uranium ore associated coal measures was proposed.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2009年第5期1-5,10,共6页
Coal Geology & Exploration
基金
国家重点基础研究发展计划(973计划)项目(2003CB214602
2006CB202202)
中国博士后科学基金项目(20070421103)
关键词
低煤级煤
吸附络合
铀酰离子
亲煤型砂岩铀矿
成矿过程
low-rank coal
adsorbing and complexing
uranyl ion
sand-type uranium ore associated coal measures
ore-forming process
作者简介
杨志远（1968－），男，江西临川人，博士后，教授，主要从事煤与煤层气资源评价和煤化学研究．
