煤田地质与勘探2017，Vol.45Issue(1)：26-30,5.DOI:10.3969/j.issn.1001-1986.2017.01.005
煤矸石中汞和砷的赋存形态研究
The mode of occurrence of mercury and arsenic in coal gangues
摘要
Abstract
In this paper, the modes of occurrence of Hg and As in three coal gangues were analyzed by sequential extraction procedure (SEP), aiming to provide the theoretical basis of removing mercury and arsenic in the process of power generation using coal gangue. The occurrence modes of As and Hg could be characterized as ion-exchangeable, carbonate-bound, iron-manganese oxide-bound, sulfides-bound, organic-bound and residual forms. The corresponding forms were obtained by adding different extraction solutions sequentially. The experi-mental results show that the sulfides-bound Hg and As are dominant form, accounting for 67.66%~72.68% and 56.71%~79.36% of the total Hg and As in the coal gangues respectively. The residual Hg and As are the second most abundant form, accounting for 23.70%~28.06% and 11.47%~18.02% of the total Hg and As in the coal gangues respectively. In addition, the content of the organic-bound As found in coal gangue is rare.关键词
煤矸石/汞/砷/赋存形态Key words
coal gangue/mercury/arsenic/modes of occurrence分类
矿业与冶金引用本文复制引用
曹艳芝,郭少青,翟晋栋..煤矸石中汞和砷的赋存形态研究[J].煤田地质与勘探,2017,45(1):26-30,5.基金项目
国家自然科学基金项目(41372350) The General Program of the National Natural Science Foundation of China (41372350) （41372350）
