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Efficiency of Ozone-Based Advanced Oxidation Processes in Treating Recirculating Irrigation Water

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Title: Efficiency of Ozone-Based Advanced Oxidation Processes in Treating Recirculating Irrigation Water
Author: Bertrand, Brenden
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Dixon, Mike
Abstract: The efficacy of using ozone, ultraviolet, and an ozone/UV-based advanced oxidation process (AOP) for the remediation of recycled greenhouse irrigation water was examined. Begonia x heimalis and Gerbera jamesonii were grown for a full crop cycle – no differences were found between the treatments. Lemna minor was used as a bioassay surrogate for vascular plants and cultured in Hoagland’s solution containing various concentrations of glyphosate and paclobutrazol to determine an EC50. Lemna were then cultured in solution drawn from the treatment system reservoirs spiked with the EC50 dose of glyphosate during an irrigation cycle. Recovery of some metrics was observed in O3 and AOP treatments. A dose of 0.78mL L-1 glyphosate was applied to the irrigation reservoirs at the start of a plant growth cycle of Salvia splendens. The systems were not able to protect from the challenge at the rates of herbicide applied.
URI: http://hdl.handle.net/10214/17802
Date: 2020-01-01
Rights: Attribution 4.0 International
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Attribution 4.0 International Except where otherwise noted, this item's license is described as Attribution 4.0 International