岩石样品的静态酸中和能力评价  

Evaluation of Acid Neutralization Capacity of Rocks

作　　者：赵峰华[1] 刘乃利[1,2] 孙红福[1] 刘一鸣[1] 张璐[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]北京咏归科技有限公司,北京100085

出　　处：《地球科学（中国地质大学学报）》2013年第5期1099-1106,共8页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金项目(Nos.40972110;41102096);国家国际科技合作专项资助项目(No.2012DFG71060)

摘　　要：岩石的酸中和能力(acid neutralization capacity,ANC)是静态产酸预测中最具争议的一个重要参数.利用4种酸中和能力评价方法对山西省西山煤田石炭二叠纪含煤岩系的12个岩石样品进行了评价.研究表明,过滤的Sobek ANC方法能够有效消除反应性黄铁矿对ANC测定的影响,比修正的Sobek ANC方法计算的ANC值更准确;持续的Sobek ANC方法只对泥岩和黄铁矿样品具有一定的实际意义.矿物ANC计算法适宜评价冒泡反应强烈的灰岩和菱铁矿样品,而泥岩和砂岩的矿物ANC计算值不能反映样品的酸中和能力.灰岩和菱铁矿样品具有很强的酸中和能力,且ANC值不随时间变化;砂岩和泥岩的ANC值较低,其ANC值随时间逐渐降低.Acid neutralization capacity（ANC）of rocks is an important parameter of static acid generating prediction,and it is also the most controversial parameter.Twelve typical country rocks of Permo-Carboniferous coal-bearing measures from Xishan coal field at Shanxi Province are studied by four evaluation methods of acid neutralization capacity.Filtered Sobek ANCtest can effectively eliminate effect of reactive pyrite for ANCdetermination.The ANCvalue based on filtered Sobek ANCtest is more accurate than that of Modified Sobek ANCtest.Sequential Sobek ANCtests are feasible for mudstone and pyrite samples.Mineralogical ANC method is more suitable for evaluating limestone and siderite samples with strong bubbling reaction,but not for mudstone and sandstone samples.The Mineralogical ANC value cant reflect the real acid neutralization capacity of mudstone and sandstone samples.Limestone and siderite samples have strong acid neutralization capacity,and the ANCvalues of samples do not change with time.Sandstone and mudstone samples have low ANCvalues,which decrease with time.

关 键 词：岩石 酸中和能力 产酸潜力 产酸预测 环境地球化学 

分 类 号：X751[环境科学与工程—环境工程]