【引用本文】 周长松, 邹胜章, 谢浩, 等. 测试滞后对岩溶水样性质的影响研究[J]. 岩矿测试, 2019, 38(1): 92-101. doi: 10.15898/j.cnki.11-2131/td.201711040175
ZHOU Chang-song , ZOU Sheng-zhang , XIE Hao , et al. The Effect of Testing Lag on Chemical Indexes of Karst Water[J]. Rock and Mineral Analysis, 2019, 38(1): 92-101. doi: 10.15898/j.cnki.11-2131/td.201711040175

测试滞后对岩溶水样性质的影响研究

1. 中国地质科学院岩溶地质研究所, 自然资源部广西岩溶动力学重点实验室, 自然资源部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)水资源与环境学院, 北京 100083

收稿日期: 2017-11-04  修回日期: 2018-03-26 

基金项目: 国家研发计划课题(2017YFC0406104);国土资源部地质调查项目(DD20160300,DD20160302);国家自然科学基金项目(41502342);广西自然科学基金面上项目(2016JJA150091,2017GXNSFAA198208,2015GXNSFBA139139188)

作者简介: 周长松,硕士,助理研究员,研究方向为水文地质与环境地质。E-mail:zhouchangsongsx@163.com。。

The Effect of Testing Lag on Chemical Indexes of Karst Water

1. Institute of Karst Geology, Chinese Academy of Geological Sciences;Karst Dynamics Laboratory, Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Ministry of National Resources, Guilin 541004, China;

2. China University of Geosciences(Beijing), Beijing 100083, China

Received Date: 2017-11-04
Revised Date: 2018-03-26

摘要:样品测试是研究岩溶区水工环问题的重要手段。岩溶区交通不便利、样品运输困难以及测试单位处理样品不及时,导致样品测试存在不同程度的滞后,现有研究还不能有效解释"测试滞后"对岩溶水样性质有何影响。为此,本文以云南宣威市一典型岩溶泉水为研究对象,通过离子色谱仪、原子发射光谱仪等测试手段,对同一时间点采集的泉水样品按照时间序列对K+、Na+、Ca2+、Mg2+、Cl-、SO42-、HCO3-、pH、NO3-、CO2(fs)共10项指标进行对比实验,探讨"测试滞后"对岩溶水样性质的影响。结果表明:岩溶水样放置过程中,各指标A类标准不确定度为0.02~1.83,HCO3-、Ca2+不确定度值显著高于其他指标;Shapiro-Wilk正态性检验结果显示pH、K+、Mg2+、Cl-、NO3-服从正态分布;随着时间变化,各指标相对偏差变化范围0%~57.38%,其中pH、Ca2+、SO42-、NO3-的相对偏差在允许误差范围之内;10项指标均值含量与变异系数总体呈显著负相关性(Spearman相关系数为-0.709,P<0.05),变异系数为Na+ > K+ > CO2(fs) > Mg2+ > Cl- > SO42- > Ca2+ > HCO3- > pH>NO3-,揭示测试滞后对不同指标的影响程度不同,其中对质量分数低的指标影响尤为突出。在整个实验期间内,水样水质变化可分为5个阶段:以各项指标未出现明显变化的初期稳定阶段(0~3d),以Na+、K+、Mg2+三项指标出现显著变化的初步变化阶段(3~5d),以多项指标发生较为显著变化的混合变化阶段(5~17d),以微生物作用为主的细菌潜在影响阶段(17~35d),以水质趋于稳定的相对平衡阶段(35~75d),其中"细菌作用"和"碳酸平衡作用"是岩溶水样放置过程中存在的两个重要作用机制。研究结果可为提高岩溶水样测试质量提供科学指导。

关键词: 岩溶水, 样品测试, 测试滞后, 水质, 影响

The Effect of Testing Lag on Chemical Indexes of Karst Water

KEY WORDS: karst water, sample testing, testing lag, water quality, influence

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测试滞后对岩溶水样性质的影响研究

周长松, 邹胜章, 谢浩, 朱丹尼, 陈宏峰, 俞建国