Using Lysimeters To Evaluate the Relative Mobility and Plant Uptake of Four Herbicides in a Rye Production System

Sakaliene, Ona; Papiernik, Sharon K.; Koskinen, William C.; Kavoliunaite, Irena; Brazenaitei, Janina

doi:10.1021/jf8032667

Cited by 15 publications

(22 citation statements)

References 21 publications

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“…It presents high solubility in water and is particularly stable against hydrolysis and photolysis. Its chemical stability, along with its mobility, enables this herbicide to penetrate through soil, causing long term contamination of ground and surface water supplies along with losses in production of certain plant species (i.e. potato crops) .…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of the herbicide clopyralid: kinetics, degradation pathways and ecotoxicity evaluation

Berberidou

Kitsiou

Karahanidou

et al. 2015

J of Chemical Tech & Biotech

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BACKGROUND: Photocatalytic decomposition and mineralization of the herbicide clopyralid in aqueous solutions has been studied, aiming at an extended kinetic analysis, the elucidation of potential degradation pathways and the determination of ecotoxicity. RESULTS:The pseudo-first-order degradation kinetics was studied under different operational conditions, such as type of photocatalyst, catalyst loading, initial pH and hydrogen peroxide (H 2 O 2 ) concentration. The degradation rates proved to be strongly influenced by these parameters. Organic chlorine and nitrogen were easily converted into inorganic in the presence of TiO 2 P25, resulting in 90% conversion in both cases within 180 min of illumination, while conversion was enhanced in the presence of H 2 O 2 . Ten possible transformation products were identified by means of LC-DAD-ESI/MS analysis. Acute toxicity profiles using marine bacteria Vibrio fischeri showed an increasing trend during the first 60 min of illumination, which thereafter, progressively decreased. CONCLUSIONS: Intermediates were formed mainly through pyridine ring transformation, dechlorination and decarboxylation reactions. The increasing trend in ecotoxicity at the first stages of degradation could be attributed to the progressive formation of intermediates more toxic than the parent molecule, or due to synergistic effects among the transformation products.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of the herbicide clopyralid: kinetics, degradation pathways and ecotoxicity evaluation

Berberidou

Kitsiou

Karahanidou

et al. 2015

J of Chemical Tech & Biotech

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“…This method allows for the accumulation of data on the fate of chemicals applied to bareground and vegetated soil systems 5,10 . This approach was used to evaluate arsenic (As) downward leaching, absorption, and translocation into plants for bermudagrass (Cynodon dactylon) systems following application of the organic arsenical herbicide monosodium methyl arsenate (MSMA) 9 .…”

Section: Representative Resultsmentioning

confidence: 99%

Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation

Matteson

Mahoney

Gannon

et al. 2014

JoVE

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Potentially toxic chemicals are routinely applied to land to meet growing demands on waste management and food production, but the fate of these chemicals is often not well understood. Here we demonstrate an integrated field lysimetry and porewater sampling method for evaluating the mobility of chemicals applied to soils and established vegetation. Lysimeters, open columns made of metal or plastic, are driven into bareground or vegetated soils. Porewater samplers, which are commercially available and use vacuum to collect percolating soil water, are installed at predetermined depths within the lysimeters. At prearranged times following chemical application to experimental plots, porewater is collected, and lysimeters, containing soil and vegetation, are exhumed. By analyzing chemical concentrations in the lysimeter soil, vegetation, and porewater, downward leaching rates, soil retention capacities, and plant uptake for the chemical of interest may be quantified. Because field lysimetry and porewater sampling are conducted under natural environmental conditions and with minimal soil disturbance, derived results project real-case scenarios and provide valuable information for chemical management. As chemicals are increasingly applied to land worldwide, the described techniques may be utilized to determine whether applied chemicals pose adverse effects to human health or the environment. Video LinkThe video component of this article can be found at

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“…40 Its chemical stability, along with its mobility, enables this herbicide to penetrate through soil, causing a long-term contamination of ground and surface water supplies. 41 Clopyralid is hazardous to certain endangered plant species, beneficial insects and mammals. 42,43 Photocatalytic efficiency of the as-prepared rGO/TiO 2 composites was also evaluated based on their potential to inactivate bacterial endospores of Bacillus stearothermophilus (B. stearothermophilus).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO₂ composites

Berberidou

Kyzas

Paspaltsis

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Recombination of photogenerated carriers in titanium dioxide (TiO2)‐mediated semiconducting photocatalysis is considered to be the principal obstacle in its unlimited exploitation in practical applications. Hybridization of TiO2 with graphene‐based materials appears to be a highly promising alternative. In this context, reduced graphene oxide (rGO)/TiO2 composites were prepared using a simple ultrasonically assisted route under mild reaction conditions. RESULTS The as‐prepared composites were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectrometry (EDS), Fourier‐transform infrared spectroscopy (FTIR) and nitrogen adsorption–desorption isotherms. Photocatalytic efficiencies of the as‐prepared composites were evaluated employing the pesticide clopyralid as a model pollutant. Initial degradation and mineralization rates obtained in the presence of the as‐prepared composites were, in all cases, higher than the one obtained in the presence of the bare TiO2, with 5% rGO/TiO2 achieving the highest r0 and rDOC values. The as‐prepared composites also were evaluated based on their potential to inactivate bacterial endospores of the Bacillus stearothermophilus species, well‐known for their extraordinary resistance to most inactivation processes. Prevalence of 5% rGO/TiO2 in the inactivation of B. stearothermophilus among all as‐prepared materials was evident, accomplished within 120 min of UV‐A illumination. Real‐time PCR experiments enabled the detection of genomic DNA released during photocatalytic oxidation, in the presence of 5% rGO/TiO2 and UV‐A, suggesting lysis of the outer and inner spore coat caused by the generated ROS. CONCLUSIONS These findings demonstrate the potential of rGO, a low‐cost, nontoxic material to serve as a reliable alternative in the enhancement of TiO2 photocatalytic efficiency in water processing applications. © 2019 Society of Chemical Industry

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Using Lysimeters To Evaluate the Relative Mobility and Plant Uptake of Four Herbicides in a Rye Production System

Cited by 15 publications

References 21 publications

Photocatalytic degradation of the herbicide clopyralid: kinetics, degradation pathways and ecotoxicity evaluation

Photocatalytic degradation of the herbicide clopyralid: kinetics, degradation pathways and ecotoxicity evaluation

Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation

Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO₂ composites

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Using Lysimeters To Evaluate the Relative Mobility and Plant Uptake of Four Herbicides in a Rye Production System

Cited by 15 publications

References 21 publications

Photocatalytic degradation of the herbicide clopyralid: kinetics, degradation pathways and ecotoxicity evaluation

Photocatalytic degradation of the herbicide clopyralid: kinetics, degradation pathways and ecotoxicity evaluation

Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation

Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO2 composites

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Product

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Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO₂ composites