Bioretention is a best management practice (BMP). In this research, pot prototypes filled with bioretention media were built to simulate the conditions of natural growth of three grasses: Panicum virgatum, Kentucky-31 and Bromus ciliatus. Synthetic runoff was applied…
Contents
CHAPTER 1 INTRODUCTION
CHAPTER 2 BACKGROUND
2.1 Bioretention
2.2 Heavy Metals in Runoff
2.3 Heavy Metals Uptake by Plants
2.4 Influencing Factors for Bioavailability
2.4.1 pH
2.4.2 Redox Potentials (Eh)
2.4.3 Cation Exchange Capacity (CEC)
2.4.4 Soil Type
2.4.5 Chelates
2.5 Phytoremediation
2.5.1 Process of Phytoremediation
2.5.2 Mechanism of Phytoremediation of Metals
2.6 Plants Investigated
2.6.1 Panicum virgatum (Switch grass)
2.6.2 Kentucky-31 (Tall fescue)
2.6.3 Bromus ciliatus (Fringed brome)
CHAPTER 3 METHODOLOGY
3.1 Bioretention Media
3.2 Plant Seeds
3.3 Experiment Design
3.4 Sampling and Pretreatment
3.4.1 Soil
3.4.2 Vegetation
3.4.3 Input and Infiltrated Water
3.4.4 Metal Extraction
3.5 Metal Analysis
3.6 Data Analysis and Calculation
3.6.1 Cumulative Volume and Mass
3.6.2 Heavy Metals in Soil and Plant
3.6.3 Mass Balance Analysis
3.6.4 Statistical Analysis
CHAPTER 4 RESULTS AND DISCUSSION
4.1 Effluent Metal Concentration
4.2 Metal Accumulations
4.2.1 Temporal Variation of Metals
4.2.2 Spatial Distribution in the Plants
4.2.3 Accumulation of Metals in the Plants
4.2.4 Biomass and Heavy Metal Accumulation
4.3 Metals in Soil
4.4 Relationship of Metals in Soil and Plants
4.5 Mass Balance of Metals
4.6 Crop Disposal
CHAPTER 5 CONCLUSIONS AND RECOMMENDATION
APPENDIX
REFERENCES
Author: sun, xueli
Source: University of Maryland
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