岩溶地下水样品Ca^(2+)、HCO_3^-野外测试值与实验室测试值对比研究  

Contrast study of Ca^(2+) and HCO_3^- concentration in karst-water samples between field test and laboratory test values

作　　者：周长松[1] 邹胜章[1] 朱丹尼 谢浩 陈宏峰[1] 俞建国[1] 

机构地区：[1]中国地质科学院岩溶地质研究所/国土资源部广西岩溶动力学重点实验室/岩溶生态系统与石漠化治理重点实验室,广西桂林541004 [2]中国地质大学(北京),北京100083

出　　处：《中国岩溶》2017年第5期684-690,共7页Carsologica Sinica

基　　金：国家重点研发计划专项(2017YFC0406104);国土资源部地调项目(1212011121166;1212011121164;DD20160300;DD20160302);广西基金项目(2016JJA150091);环境保护部公益性行业专项(2016A101)

摘　　要：为了阐明岩溶区地下水中Ca^(2+)、HCO_3^-质量浓度野外测试与实验室测试结果间的差异,于2011年至2013年先后在遵义、河池、娄底3个城市采集枯、丰水期地下水样品85组,通过比值法对3个地区干湿季节岩溶地下水样中Ca^(2+)、HCO_3^-质量浓度野外与实验室测试结果进行对比。结果表明:85组样品中有88.2%的采样点存在Ca^(2+)野外值(CaY)大于实验值(CaS),64.7%的采样点存在HCO_3^-的野外值(HCO_(3Y))大于实验值(HCO_(3S));(CaY/CaS)平均值为1.11,主要集中在1.0~1.2之间(占总数的70%);(HCO_(3Y)/HCO_(3S))平均值为1.02,主要集中在0.95~1.1之间(占总数的75%)。野外滴定过程中的人为随机误差是造成两种离子质量浓度野外测试值普遍高于实验室测试值的主要原因。In order to grasp the differences of Ca^(2+)and HCO_3^- concentration in karst water between field test and laboratory test values,85 groundwater samples collected from Zunyi,Hechi and Loudi City were analyzed.The results show that 88.2% of the sample sites of Ca^(2+) have field values greater than the experimental values,while 64.7% of the sample sites of HCO_3^- have field values greater than the experimental values.Using the ratio method,(CaY/CaS)is of an average value of 1.11,mainly concentrating between 1.0 and 1.2,accounting for 70% of the total,and(HCO_(3Y)/HCO_(3S))with a average value of 1.02,mainly concentrated in between 0.95 and 1.1,accounting for 75% of the total.Under certain conditions of the laboratory test error,artificial random error has some impact on the result of the test.The results provide basic data to improve the quality of field surveys of underground water.

关 键 词：地下水 岩溶区 比值法 钙 重碳酸根 

分 类 号：P641.73[天文地球—地质矿产勘探]