论文部分内容阅读
采用逐级化学提取法研究了煤中溴的赋存状态,用电感耦合等离子体质谱(ICP-MS)测定了煤及各种提取状态中溴的含量.结果表明,来自四川和重庆的8个煤中溴主要以水溶态、离子交换态、碳酸盐结合态、铁锰结合态和有机态存在,平均总提取率为88.2%.对于烟煤和无烟煤,前者有机态溴的相对量大于后者,平均值分别为22.3%和20.0%;而碳酸盐结合态溴小于后者,相对量分别为14.0%和19.2%;两者水溶态溴和铁锰结合态溴的相对量几乎相等.煤中离子交换态溴可能以有机质吸附为主,溴的各种赋存形态的相对量与其成煤时沉积环境可能没有很密切的关系.煤中溴的潜在可淋失率和淋出浓度比较大,可淋失率为36.62%～86.80%,可淋失量为7.092～20.10μg/g,对环境的潜在危害应引起重视.
The occurrence status of bromine in coal was studied by step-by-step chemical extraction method, and the content of bromine in coal and various extraction states was determined by inductively coupled plasma mass spectrometry (ICP-MS) .The results showed that the content of bromine in coal from Sichuan and Chongqing The average bromine content in a coal is mainly in the form of water-soluble, ion-exchangeable, carbonate-bound, ferromanganese-bound and organic, with an average total extraction of 88.2% .For the bituminous and anthracite coal, , With the average values of 22.3% and 20.0%, respectively; while the amount of carbonate-bound bromine is less than that of the latter, the relative amounts are 14.0% and 19.2%, respectively; and the relative amounts of water-soluble bromine and iron-manganese bound bromine are nearly equal. Ion exchangeable bromine in coal may be dominated by adsorption of organic matter, and the relative amounts of various forms of bromine may not be closely related to the depositional environment during coal formation. The potential leaching rate and leaching concentration of bromine in coal are compared Large, the leaching rate of 36.62% ~ 86.80%, the leaching loss of 7.092 ~ 20.10μg / g, the potential harm to the environment should be taken seriously.