Evaluation of management practices and remediation techniques for improving water quality in agricultural systems
type: CreativeWork
description: 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 total suspended solids (TSS), total phosphorus (TP), BOD5, and inorganic anion loads compared to the BR and SR techniques during the study period. Rainfall amount correlated with TSS, BOD5, total Kjeldahl nitrogen (TKN), TP, nitrate-N, and nitrite-N exports in each treatment, and runoff turbidity significantly correlated with TSS (R2 = 0.95, P < 0.001).The BR treatment exhibited higher total carbon (TC), total organic carbon (TOC), and particulate organic carbon (POC) export, and these parameters were also positively correlated to runoff turbidity and TSS (R2 = 0.42-0.87, P < 0.001). The pyrolysis-GC/MS analysis of the runoff sediments indicated higher intensity of lignin-derived compounds in the BR treatment than in the RR and SR treatments. Polysaccharide-derived compounds, dominated by levoglucosan, tended to decrease over the growing season in all the treatments, and were lower in the BR treatment. Examination of a wide range of simulated agricultural effluents showed that short-term BOD measurements (BOD2 and BOD5) significantly correlated with TOC, POC, and dissolved organic carbon (DOC) (R2 = 0.62-0.77, P < 0.001), as well as to nitrite-N and total N (R2 = 0.45-0.66, P < 0.001), and improved relationships were obtaine…
abstract: 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 total suspended solids (TSS), total phosphorus (TP), BOD5, and inorganic anion loads compared to the BR and SR techniques during the study period. Rainfall amount correlated with TSS, BOD5, total Kjeldahl nitrogen (TKN), TP, nitrate-N, and nitrite-N exports in each treatment, and runoff turbidity significantly correlated with TSS (R2 = 0.95, P < 0.001).The BR treatment exhibited higher total carbon (TC), total organic carbon (TOC), and particulate organic carbon (POC) export, and these parameters were also positively correlated to runoff turbidity and TSS (R2 = 0.42-0.87, P < 0.001). The pyrolysis-GC/MS analysis of the runoff sediments indicated higher intensity of lignin-derived compounds in the BR treatment than in the RR and SR treatments. Polysaccharide-derived compounds, dominated by levoglucosan, tended to decrease over the growing season in all the treatments, and were lower in the BR treatment. Examination of a wide range of simulated agricultural effluents showed that short-term BOD measurements (BOD2 and BOD5) significantly correlated with TOC, POC, and dissolved organic carbon (DOC) (R2 = 0.62-0.77, P < 0.001), as well as to nitrite-N and total N (R2 = 0.45-0.66, P < 0.001), and improved relationships were obtaine…
author: Udeigwe, Theophilus Kene
keywords: carbon export, biosolids, biochemical oxygen demand, bauxite residue, animal manure, fatty acids, heavy metals, N-containing, lignin, levoglucosan, nonpoint source pollution, particulate organic carbon, polysaccharides, pyrolysis-GC/MS, SAR, total carbon, TMAH, surface runoff, sugarcane residue, total dissolved solids, total Kjeldahl nitrogen, water quality, turbidity, total suspended solids, total phosphorus, total organic carbon, dissolved organic carbon
date published: 2008-01-01T08:00:00Z
date modified: 2026-07-24T02:59:15Z
provider: Lousiana State University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Plant, Environmental Management and Soil Sciences

PropertyValue
property ID: DOI
value: 10.31390/gradschool_dissertations.1313