This book is of interest regarding acid mine drainage (AMD), an important environmental problem caused by the natural weathering of metal sulfides during the utilization of mineral resources. In the AMD-contaminated watershed environment, a large number of metastable iron-sulfate secondary minerals are often formed, which can adsorb and co-precipitate heavy metals within AMD. At the same time, mineral transformation determines the rerelease behavior of heavy metals and their fate in different phases. This book introduces the scientific problems of biochemically controlled processes and heavy metal release mechanisms driven by various environmental factors as follows: ① migration and fate of metallic elements in the mud impoundment and the affected river; ② SO24 -migration in an AMD-affected river; ③ mineralogical characteristics of sediments in an AMD-affected river; ④ Fe- and S-metabolizing microbial communities in an AMD-affected river ecosystem; ⑤ chemical and biological transformations of secondary mineral phases in AMD-affected river sediments.This theoretical framework will help to clarify the migration pathways and internal mechanism of heavy metals in mining areas, thus providing insight into the prevention and control of heavy metal pollution in such areas.
作者简介
目录 Chapter 1 Pollution of Acid Mine Drainage in The Mining Area
1.1 Acid Mine Drainage and Its Occurrence
1.2 Mechanism of AMD Generation
1.3 AMD Prevention and Control Techniques
1.3.1 Oxygen Barrier
1.3.2 Bactericide
1.3.3 Co-Disposal and Blending
1.3.4 Passivation
1.3.5 Passive Treatment Techniques
1.4 Main Points of Interest in This Book
1.4.1 Sulfur Cycle in AMD-Affected Watershed
1.4.2 Fe Cycling and Nano-Fe(III) secondary minerals in AMD-Affected Watershed
1.4.3 Main Points of Interest inOurWork
1.5 The Dabaoshan Mine
1.5.1 Mineral Resources of The Dabaoshan Mine
1.5.2 Solid Waste Disposal in the Mine Area
1.5.3 AMD Control and Its Treatment in Mine Area
1.5.4 AMD Pollution in the Dabaoshan Mine Area
1.5.5 General Sampling Sites Arrangement
Chapter 2 Sulfate Migration and Geochemical Behaviors in the AMD-Affected River
2.1 Physicochemical Characteristics of the Affected River Watershed
2.1.1 Acidic Watershed Environments
2.1.2 High Turbidity
2.1.3 Steep Riverbed Upstream
2.1.4 Oxidative Water Condition
2.1.5 High Salinity
2.2 Sulfur Element Distribution in the Watershed
2.2.1 Dissolved Sulfur in Water Phase
2.2.2 Sulfur Distributions in Sediments
Chapter 3 Metallic Elements’ Fate and Migration Mechanisms in the AMD-Affected River
3.1 Metallic Elements in the Watershed
3.1.1 Dissolved Metallic Elements in the Water Phase
3.1.2 Metallic Elements in Sediment Phase
3.2 Migration Mechanisms for Metallic Elements in the Affected Watershed
3.2.1 Potential Mobility
3.2.2 Oxidative Leaching and Re-Adsorption
3.2.3 Hydraulic Transportation
3.2.4 Precipitation/ Co-Precipitation
3.3 Relations of Sulfur, Iron, and Metallic Elements in the Watershed
3.3.1 Relationship Argumentation by SPSS Analysis
3.3.2 Relationship Argumentation by Mineralogy Analysis
3.3.3 Relationship Argumentation via Isotope Analysis
Chapter 4 Microbial Community Composition in AMD-Polluted Watershed and Paddy Soil
4.1 Microbial Community Shifts in Response to AMD Pollution in the Hengshi River Watershed
4.1.1 Materials and Methods
4.1.2 Physicochemical Characterization of the Watershed
4.1.3 Alpha Diversity Analyses
4.1.4 Beta Diversity Analyses
4.1.5 Spatiotemporal Dynamics of Microbial Communities
4.2 Microbial Community Responses to AMD-Laden Pollution in Rice Paddy Soils
4.2.1 Investigating the Effect of Pollution inAMD-Affected Paddy Soil
4.2.2 Microbial Community and Soil Properties
4.2.3 The Spatial Pattern of Microbial Community
Chapter 5 Chemical Transformations of Secondary Minerals in the AMD-Affected Area: Induced by Dissolved Organic Matter
5.1 Role of L-Tryptophan in the Release of Chromium from Schwertmannite
5.1.1 Experimental Setting
5.1.2 Results and Discussion
5.1.3 Possible Mechanism
5.2 Fulvic Acid Induction of the Liberation of Chromium From CrO24 -Substituted Schwertmannite
5.2.1 Release of Total Fe, Cr, and SO24- from Schwertmannite
5.2.2 Cr Speciation Analysis
5.2.3 Proposed Schematic Illustrating Fate of Fe and Cr
5.3 Elucidation of Desferrioxamine B on the Liberation of Chromium from Schwertmannite
5.3.1 Dissolution Kinetics
5.3.2 Effects of DFOB and pH on the Dissolution of Cr-Schwertmannite
Chapter 6 Chemical Transformations of Secondary Minerals in AMD-Affected Area: Induced by Inorganic Substance
6.1 Effect of Cu(II) on the Stability of Oxyanion-Substituted Schwertmannite
6.1.1 Schwertmannite Synthesis
6.1.2 Stability Experiments
6.1.3 Effect of Cu(II) on the Stability of Oxyanion-Substituted Schwertmannite
6.2 Transformation of Cadmium-Associated Schwertmannite and Subsequent Element Repartitioning Behaviors
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