不同粒度热改性煤矸石的制备及其对甲基橙的最佳吸附性能
Preparation of Thermal Modified Coal Gangue with Different Particle Sizes and Its Optimum Adsorption Properties for Methyl Orange
李泽文 1刘德华 1岳志涵 2李育康 1王宇杰 1魏瑞丽1
作者信息
- 1. 西安建筑科技大学华清学院,陕西 西安 710043
- 2. 海南龙源新能源有限公司,海南 海口 570100
- 折叠
摘要
以不同粒度煤矸石为原料,制备吸附甲基橙效果最佳的热改性煤矸石.研究发现,0.075 mm(200 目)煤矸石在650℃煅烧2h得到的热改性煤矸石对甲基橙的吸附性能最佳.由SEM和XRD可知在煅烧过程中煤矸石中有机物与部分碳挥发并且颗粒内部发生脱羟基反应,变得疏松多孔,煤矸石宏观层状结构被破坏,晶格缺陷增加,转化为活性偏高岭石,活化吸附位点增加.此热改性煤矸石对甲基橙的吸附最优条件为:吸附温度为25℃,吸附时间为1.5 h、热煤矸石加入量为0.2 g,甲基橙初始质量浓度为25 mg·L-1.
Abstract
In this study,the thermal modified coal gangue with different particle size was used as raw material to prepare the best methyl orange adsorption effect.It is found that 0.075 mm(200 mesh)coal gangue calcined at 650℃ for 2 h has the best methyl orange adsorption performance.SEM and XRD show that in the calcination process,organic matter and part of carbon in the coal gangue volatilize and dehydroxylation reaction occurs inside the particles,becoming loose and porous,the macro layered structure of coal gangue is destroyed,lattice defects increase,and it is transformed into active metakaolinite,and the activated adsorption site increases.The optimal conditions for the adsorption of methyl orange by the thermal modified coal gangue are as follows:the adsorption temperature is 25℃,the adsorption time is 1.5 h,the addition amount of hot coal gangue is 0.2 g,and the initial mass concentration of methyl orange is 25 mg·L-1.
关键词
热改性煤矸石/甲基橙/吸附Key words
thermal modified coal gangue/methyl orange/adsorption引用本文复制引用
基金项目
2023年大学生创新创业训练计划项目(省级)(S202313679015)
出版年
2024
NETL
NSTL
万方数据