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Evaluation Of Management Practices And Remediation Techniques For Improving Water Quality In Agricultural Systems, Theophilus Kene Udeigwe
Evaluation Of Management Practices And Remediation Techniques For Improving Water Quality In Agricultural Systems, Theophilus Kene Udeigwe
LSU Doctoral Dissertations
Surface water quality impairment is often associated with agricultural activities. In this study, the effects of three sugarcane residue management techniques, namely burning (BR), shredding (SR), and retention (RR) of residues on: surface water quality, carbon export, and chemical composition of organic matter in the runoff sediments were characterized. Separate studies were conducted to evaluate predictive relationships for biochemical oxygen demand (BOD) in agricultural effluents, and the effectiveness of bauxite residues (red and brown muds) in reducing soluble nutrient/pollutant release from manure-impacted soils. All the selected water quality parameters were determined using EPA-approved analytical methods. The RR technique exported lower …
The Effect Of Contamination, Sediment Source And Salinity On The Uptake, Distribution, And Excretion Of Metals By Spartina Alterniflora, Sarahfaye Mahon
The Effect Of Contamination, Sediment Source And Salinity On The Uptake, Distribution, And Excretion Of Metals By Spartina Alterniflora, Sarahfaye Mahon
LSU Doctoral Dissertations
Spartina alterniflora, the dominant vegetation in many salt marshes, has the potential to remobilize metals (Cd, Cr, Cu, Ni, Pb, Zn) from sediment to the local salt marsh environment. My research determined the influence of sediment metal concentration, sediment type and salinity on the uptake, distribution and accumulation of metals by S. alterniflora tissues and excreted salts. Spartina alterniflora was cultivated at a constant salinity in natural and dredge sediments with three levels of metal additions (control, low, and high). The distribution and concentration of metals in S. alterniflora was influenced by both metal treatments and sediment type; however, the …