煤矸石路基材料Ca/Mg淋溶污染特性分析研究  

Pollution Characteristics of Ca/Mg Leaching from Gangue in Roadbed

作　　者：邓建设 杜勇立[2] 戚芳方[3] 张燕青[3] 黄满红[3] 

机构地区：[1]中建五局土木工程有限公司,湖南长沙410004 [2]湖南省交通规划勘察设计院,湖南长沙410008 [3]东华大学环境科学与工程学院,上海201620

出　　处：《环境科学与管理》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)

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.

关 键 词：煤矸石 钙镁元素 硬度 淋溶 

分 类 号：X752[环境科学与工程—环境工程]