大同盆地高碘地下水系统中胶体影响下的碘富集机理研究
发布时间：2020-12-21 12:08
碘是维持生物体正常新陈代谢的必需元素。机体长期的碘摄入过量增加自身免疫病的风险,导致碘中毒和智力下降等症状。诸多的研究以放射性碘同位素为主。同时有关碘的生物地球化学行为特征报道与研究均集中于滨海地区。本研究选取大同盆地典型高碘地下水系统作为研究对象,以logistic回归模型和胶体超滤分级技术作为技术支撑,以天然地下水环境中不同粒径胶体上总碘及有机碘的赋存为研究主线,综合运用水文地质调查、野外现场实验、室内实验以及模型分析等多种研究方法,以天然高碘地下水碘的主控因素及微观赋存形态为分析重点,深入分析原生高碘地下水中天然胶体的组成、粒径分布规律及其对不同形态碘在地下水中的地球化学行为及迁移富集的影响。论文的主要研究内容和成果分为以下几个部分:1、大同盆地高碘地下水水文地球化学特征及碘富集的环境过程大同盆地地下水系统中碘的含量最高达1212μg/L,远高于国家饮用水标准中碘的含量限值（150μg/L）。高碘地下水仅存在于盆地的中心,大于400μg/L的高碘地下水主要分布于埋深小于20m的浅层含水层和埋深介于70m到90m的深层含水层。pH值介于7.5到8.2之间的的弱碱性环境有利于碘在地下...
【文章来源】：中国地质大学湖北省 211工程院校 教育部直属院校
【文章页数】：124 页
【学位级别】：博士
【文章目录】：
作者简介
摘要
Abstract
Chapter 1 Introduction
1.1 Iodine
1.1.1 Iodine distribution and cycling in natural environment
1.1.2 Iodine speciation
1.1.3 Iodine hydrogeochemical behavior
1.2 Iodine enrichment in groundwater of Datong Basin
1.3 Colloids behavior in groundwater
1.4 Interaction between iodine and colloids in groundwater systems
1.5 Objectives of this study
Chapter 2 Hydrogeochemistry of Datong Basin
2.1 Regional geography
2.2 Hydrogeology
2.3 Geochemical features of groundwater
Chapter 3 Iodine distribution in groundwater system of Datong Basin
3.1 Introduction
3.2 Methodology
3.2.1 Groundwater collection and chemical analysis
3.2.2 Sediment sampling and chemical analysis
3.3 Results and discussion
3.3.1 Hydrochemistry
3.3.2 Iodine distribution in groundwater
3.3.3 Iodine distribution in sediment
3.4 Summary
Chapter 4 Major factors for high iodine groundwater based on logistic regressionmodel
4.1 Introduction
4.2 Methodology
4.2.1 Data availability
4.2.2 Method
4.2.3 Development of iodine prediction model
4.2.4 Isotope analysis
4.3 Results
4.4 Discussion
4.4.1 Variables contributing to the iodine prediction model
4.4.2 Verification of predictions
4.5 Conceptual model of iodine enrichment in groundwater systems
4.6 Summary
Chapter 5 Effects of organic and inorganic colloids on iodine mobilization ingroundwater
5.1. Introduction
5.2. Sampling and analysis
5.2.1. Field sampling
5.2.2. Groundwater and solid phase analyses
5.2.3. Elements distribution ratios （f）
5.3 Results
5.3.1. Groundwater characterization
5.3.2. Fluorescence characteristics and PARAFAC analysis
5.3.3. 0.45μm filtrate and ultrafiltrate samples
5.4. Discussion
5.4.1. Influence of redox potential
5.4.2. Influence of pH
5.4.3. Fe/NOM colloids and iodine distribution
5.5. Implication on iodine enrichment in groundwater
5.6. Summary
Chapter 6 Effects of organic and inorganic colloids on organic iodine behavior ingroundwater
6.1 Introduction
6.2 Sampling and hydrochemical analysis
6.3 Results
6.3.1 Groundwater characterization
6.3.2 Comparison of 0.45 μm filtrate with ultrafiltrate samples
6.4 Discussion
6.4.1 Effects of redox potential
6.4.2 Effects of pH
6.4.3 Role of Fe/NOM colloids on organic iodine distribution
6.5 Environmental implications
6.6 Summary
Chapter 7 Conclusions
Acknowledgements
References
【参考文献】：
期刊论文
[1]大同盆地地下水流场、水化学场变化特征[J]. 韩颖. 地质调查与研究. 2008(02)
本文编号：2929801
【文章来源】：中国地质大学湖北省 211工程院校 教育部直属院校
【文章页数】：124 页
【学位级别】：博士
【文章目录】：
作者简介
摘要
Abstract
Chapter 1 Introduction
1.1 Iodine
1.1.1 Iodine distribution and cycling in natural environment
1.1.2 Iodine speciation
1.1.3 Iodine hydrogeochemical behavior
1.2 Iodine enrichment in groundwater of Datong Basin
1.3 Colloids behavior in groundwater
1.4 Interaction between iodine and colloids in groundwater systems
1.5 Objectives of this study
Chapter 2 Hydrogeochemistry of Datong Basin
2.1 Regional geography
2.2 Hydrogeology
2.3 Geochemical features of groundwater
Chapter 3 Iodine distribution in groundwater system of Datong Basin
3.1 Introduction
3.2 Methodology
3.2.1 Groundwater collection and chemical analysis
3.2.2 Sediment sampling and chemical analysis
3.3 Results and discussion
3.3.1 Hydrochemistry
3.3.2 Iodine distribution in groundwater
3.3.3 Iodine distribution in sediment
3.4 Summary
Chapter 4 Major factors for high iodine groundwater based on logistic regressionmodel
4.1 Introduction
4.2 Methodology
4.2.1 Data availability
4.2.2 Method
4.2.3 Development of iodine prediction model
4.2.4 Isotope analysis
4.3 Results
4.4 Discussion
4.4.1 Variables contributing to the iodine prediction model
4.4.2 Verification of predictions
4.5 Conceptual model of iodine enrichment in groundwater systems
4.6 Summary
Chapter 5 Effects of organic and inorganic colloids on iodine mobilization ingroundwater
5.1. Introduction
5.2. Sampling and analysis
5.2.1. Field sampling
5.2.2. Groundwater and solid phase analyses
5.2.3. Elements distribution ratios （f）
5.3 Results
5.3.1. Groundwater characterization
5.3.2. Fluorescence characteristics and PARAFAC analysis
5.3.3. 0.45μm filtrate and ultrafiltrate samples
5.4. Discussion
5.4.1. Influence of redox potential
5.4.2. Influence of pH
5.4.3. Fe/NOM colloids and iodine distribution
5.5. Implication on iodine enrichment in groundwater
5.6. Summary
Chapter 6 Effects of organic and inorganic colloids on organic iodine behavior ingroundwater
6.1 Introduction
6.2 Sampling and hydrochemical analysis
6.3 Results
6.3.1 Groundwater characterization
6.3.2 Comparison of 0.45 μm filtrate with ultrafiltrate samples
6.4 Discussion
6.4.1 Effects of redox potential
6.4.2 Effects of pH
6.4.3 Role of Fe/NOM colloids on organic iodine distribution
6.5 Environmental implications
6.6 Summary
Chapter 7 Conclusions
Acknowledgements
References
【参考文献】：
期刊论文
[1]大同盆地地下水流场、水化学场变化特征[J]. 韩颖. 地质调查与研究. 2008(02)
本文编号：2929801
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