摘要
以某高速公路煤矸石路基材料项目为依托,本文在研究分析煤矸石矿物组成和元素组成的基础上,重点研究了煤矸石应用于高速公路路基后Ca、Mg的淋溶释放特性对地下水的影响。研究结果表明:煤矸石的矿物组分主要是粘土矿物(高岭石等)和钙铝硅酸盐;Ca、Mg元素在煤矸石中含量居中等水平,分别为1 438.33μg.g-1、661.67μg.g-1,淋溶元素浓度与煤矸石中元素含量不呈对应关系;Ca、Mg浓度与淋溶液累计水量间呈指数负相关关系,至720 mL后趋于稳定,说明煤矸石对地下水硬度升高的作用主要在淋溶初期;Ca、Mg淋溶特性与K、Na、B等元素的淋溶特性具有很强的正相关性。
Based on the project of An-Shao expressway in Hunan Province,mineral and element composition of gangue were studied.The leaching characteristics of Calcium ion and Magnesium ion were the key research targets after gangue was used in roadbed of expressway.As shown in this paper,Al2Si2O5（OH） 4.2H2O and K（Al,V） 2（Si,Al） 4O10（OH） 2 were the main mineral compositions of gangue.The content of Ca and Mg element were in the middle level of 1 438.33 μg.g-1 and 661.67 μg.g-1 respectively.Concentrations of Ca ion and Mg ion correlated with the volume of leaching liquid in negative ex relation.After the volume of leaching liquid reaching 720 mL,concentrations of Ca ion and Mg ion tend to be at a stable level.Leaching characteristics of Ca ion and Mg ion were positively correlated with that of K,Na and B elements.
出处
《环境科学与管理》
CAS
2013年第7期36-39,共4页
Environmental Science and Management
基金
交通运输部科技项目(2010-353-343-290)
湖南省交通科技项目(200908
201105)
国家自然科学基金(21007010)
