皖北矿区煤矸石理化特征分析及生态风险评价
Analysis of physical and chemical characteristics and and ecological risk assessment of coal gangue in Wanbei mining area
郑向东 1李明 1刘威 2王新富 3赵恒 3李建 3周晓芳3
作者信息
- 1. 安徽省皖北煤电集团有限责任公司,安徽宿州 234000
- 2. 江苏地质矿产设计研究院中国煤炭地质总局检测中心,江苏徐州 221006
- 3. 江苏地质矿产设计研究院中国煤炭地质总局检测中心,江苏徐州 221006;中国煤炭地质总局煤系矿产资源重点实验室,江苏徐州 221006
- 折叠
摘要
为了对皖北矿区煤矸石进行无害化处置和资源化利用,系统采集了不同矿区的煤矸石,利用XRD、XRF、ICP-MS及工业分析法进行煤矸石理化特征分析及生态风险评价研究.结果表明,皖北矿区煤矸石样品均具有低水分、高灰、低硫、低发热量的特征,硫含量整体偏低,矸石的组成矿物主要为石英和黏土矿物;煤矸石中Cr、Zn元素含量较高,重金属元素最高的赋存形态均为残渣态;As、Cr、Zn等元素的煤矸石浸出含量较高.皖北矿区煤矸石中重金属大致分为2类:Hg、As、Ni、Zn和Pb;Cr和Cu.重金属元素对矿区生态环境的危害性均较小,潜在生态危害指数大小排序为Cu＞Pb＞Ni＞As＞Cr＞Zn,综合潜在生态危害指数值为25.96,属于轻微风险等级.
Abstract
In order to achieve harmless disposal and resource utilization of coal gangue in the northern Anhui mining area,the coal gangue from different mining areas was collected systematically,and the analysis of physical and chemical characteristics of the coal gangue and the ecological risk evaluation study were carried out by using XRD,XRF,ICP-MS and the industrial analysis method.The results show that,the samples of coal gangue in the Wanbei mining area are all with the characteristics of low moisture,high ash,low sulphur and low calorific value,with the overall low sulphur content,and the main mineral components of gangue are quartz and clay minerals;Cr and Zn elements in the gangue content is higher,the highest occurrence form of heavy metal elements is the residual state;As,Cr and Zn and other elements of the gangue leaching content is higher.The heavy metals in the coal gangue in the Wanbei mining area are roughly divided into two categories:Hg,As,Ni,Zn and Pb,Cr and Cu.Heavy metal elements are less hazardous to the ecologi-cal environment in the mining area,the size of the potential ecological hazards index rank as Cu＞Pb＞Ni＞As＞Cr＞Zn,the compre-hensive value of the potential ecological hazards index is 25.96,belonging to the level of slight risk.
关键词
皖北矿区/煤矸石/理化特征/重金属/生态风险评价Key words
Wanbei mining area/coal gangue/physical and chemical characteristics/heavy metals/ecological risk assessment引用本文复制引用
基金项目
江苏省碳达峰碳中和科技创新专项资金(BE2023855)
徐州市科技创新重点研发计划(社会发展)(KC23325)
安徽恒源煤电股份有限公司科技创新项目(WBMD-2023-GCZB-06023)
中国煤炭地质总局科技专项基金项目(ZMKJ-2023-JBGS-02-02)
出版年
2024
NETL
NSTL
万方数据