摘要
通过对修复后矸石山不同空间位置(山顶、山腰和山底)煤矸石的重金属(Cd、Cu、Ni、Pb、Zn)总量及形态进行测定,探究修复后矸石山重金属的空间分布特征。结果表明,不同位置煤矸石的颗粒组成、pH及EC存在差异且对煤矸石中重金属分布存在影响;矸石山中重金属总量从山顶到山底整体上逐渐增加,呈现山底富集趋势,但Pb和Zn在山腰总量最大,分别为65.67mg/kg和204.46mg/kg。矸石山中重金属均以残渣态为主,而弱酸提取态最少。随着堆放高度的降低,Cd的活性逐渐增强,而Cu、Ni和Zn的活性逐渐降低。
By measuring the total and speciation of heavy metals(Cd, Cu, Ni, Pb, Zn)in different spatial locations (mountaintop, mountainside and bottom)of the gangue after restoration, the spatial distribution characteristics of heavy metals in the gangue after restoration were explored.The results show that there are differences in particle composition, pH and EC of coal gangue from different locations, and there are influences on the distribution of heavy metals in coal gangue.The total amount of heavy metals in coal gangue increases gradually from the top of the mountain to the bottom of the mountain, showing a tendency of enrichment at the bottom of the mountain, but the total amount of Pb and Zn in the gangue is the largest in the mountainside, which is 65.67mg/kg and 204.46mg/kg, respectively. The heavy metals in coal gangue are mainly in the residue state, while the extraction state of weak acid is the least. The activity of Cd increases gradually with the decrease of stacking height, while that of Cu, Ni and Zn decreases gradually.
作者
朱建明
陈孝杨
陈敏
张迪
刘英
张旭阳
龙林丽
苏永东
ZHU Jianming(School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,China)
出处
《安徽农学通报》
2021年第17期171-173,192,共4页
Anhui Agricultural Science Bulletin
基金
国家自然科学基金资助项目(41572333)
安徽理工大学芜湖研究院研发专项(ALW2020YF15)
安徽理工大学校级重点项目(xjzd2020-04)。
关键词
矸石山
煤矸石
重金属
化学形态
Coal gangue dump
Coal gangue
Heavy metals
Chemical form
