Mineralization of 14C-atrazine in an entic haplustoll as affected by selected winter weed control strategies

Hang, Susana; Houot, Sabine; Barriuso, Enrique

doi:10.1016/j.still.2007.06.004

Cited by 11 publications

(9 citation statements)

References 19 publications

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“…On the contrary, the low quantum yield of intrinsic TiO 2 has been a widely reported obstacle hampering practical applications48 and is primarily caused by the accentuated recombination of photogenerated electrons and holes 49. Previous research work has proven that the perovskite cubic SrTiO 3 offers a greater potential than pristine TiO 2 in terms of photocatalytic formation of hydrogen and oxygen and this is consonant with the results presented in Figure 8 15, 16…”

Section: Resultssupporting

confidence: 86%

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Hybridized Nanowires and Cubes: A Novel Architecture of a Heterojunctioned TiO₂/SrTiO₃ Thin Film for Efficient Water Splitting

Zhang

et al. 2010

Adv Funct Materials

299

206

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A unique morphology of SrTiO3 nanocubes precipitated on TiO2 nanowires is successfully synthesized in the form of a thin‐film heterojunctioned TiO2/SrTiO3 photocatalyst using facile hydrothermal techniques. The formation mechanisms of the synthesized photocatalysts are meticulously studied and described. Growth of SrTiO3 single crystal nanocubes (≈50 nm in width) on anatase polycrystalline nanowires follows an in situ dissolution‐precipitation pathway. This is consonant with the classic LaMer model. By analyzing the results of field emission scanning electron microscopy (FESEM), field emission transmission electron microscopy (FETEM), X‐ray diffraction (XRD), energy dispersive X‐ray (EDX) spectroscopy, X‐ray photoelectron spectroscopy (XPS), and UV‐vis spectrophotometry, a comprehensive structural and morphological characterization of the photocatalysts is established. FESEM images reveal that the anatase film comprises mainly of nanowires bristles while the tausonite film is primarily made up of nanocube aggregations. In comparison to the respective pristine semiconductor photocatalysts, the heterostructured photocatalyst demonstrates the highest efficiency in photocatalytic splitting of water to produce H2, 4.9 times that of TiO2 and 2.1 times that of SrTiO3. The enhanced photocatalytic efficiency is largely attributed to the efficient separation of photogenerated charges at heterojunctions of the two dissimilar semiconductors, as well as a negative redox potential shift in the Fermi level.

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Section: Resultssupporting

confidence: 86%

“…SrTiO 3 has a unique perovskite structure, which is found to be favorable and catalytically active in water splitting reactions 15, 16. It has been reported that SrTiO 3 is easily prepared by hydrothermal synthesis 17.…”

Section: Introductionmentioning

confidence: 99%

Hybridized Nanowires and Cubes: A Novel Architecture of a Heterojunctioned TiO₂/SrTiO₃ Thin Film for Efficient Water Splitting

Zhang

et al. 2010

Adv Funct Materials

299

206

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“…Error bars above and below the box indicate the 90th and 10th percentile, and solid dots indicate outliers. The number of independent observations is 22 for non‐adapted soils and 54 for s ‐triazine‐adapted soils 75, 85, 107–110, 121, 122, 125, 154–157…”

Section: Resultsmentioning

confidence: 99%

“…s ‐Triazine‐adapted soils occur in conventional tillage,85, 107–109 reduced tillage,9, 11–12, 74–75, 105, 121 no‐tillage84, 105, 107, 108, 121, 122 and cover crop production systems 121, 123. Studies comparing enhanced atrazine degradation among residue management systems are limited, but, when evaluated, atrazine dissipation is similar among NT, CT and cover crop systems 121. Thus, residue management systems do not appear to impede adaptation when s ‐triazine herbicides are a component of the weed control program.…”

Section: Resultsmentioning

confidence: 99%

Agronomic and environmental implications of enhanceds-triazine degradation

et al. 2010

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environmental implications of enhanced s-triazine degradation" (2010 AbstractNovel catabolic pathways enabling rapid detoxification of s-triazine herbicides have been elucidated and detected at a growing number of locations. The genes responsible for s-triazine mineralization, i.e. atzABCDEF and trzNDF, occur in at least four bacterial phyla and are implicated in the development of enhanced degradation in agricultural soils from all continents except Antarctica. Enhanced degradation occurs in at least nine crops and six crop rotation systems that rely on s-triazine herbicides for weed control, and, with the exception of acidic soil conditions and s-triazine application frequency, adaptation of the microbial population is independent of soil physiochemical properties and cultural management practices. From an agronomic perspective, residual weed control could be reduced tenfold in s-triazine-adapted relative to non-adapted soils. From an environmental standpoint, the off-site loss of total s-triazine residues could be overestimated 13-fold in adapted soils if altered persistence estimates and metabolic pathways are not reflected in fate and transport models. Empirical models requiring soil pH and s-triazine use history as input parameters predict atrazine persistence more accurately than historical estimates, thereby allowing practitioners to adjust weed control strategies and model input values when warranted. Published

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“…After 30 d of it application, 98.6 and 96.5% of the initial atrazine input for Pergamino and Junín, respectively, was not recovered. Atrazine accelerate mineralization is a process detected in soils where atrazine application is frequently used (Barriuso and Houot, 1996;Hang et al, 2005;2007a). This process is due to development of adapted microflora induced by atrazine application, and atrazine is mineralized until carbon dioxide in very short periods (Zablotowicz et al, 2006;Hang et al, 2007a).…”

Section: Mass Balancementioning

confidence: 99%

Integral Study of Atrazine Behaviour in Field Lysimeters in Argentinean Humid Pampas Soils

Hang

Andriulo

Sasal

et al. 2010

Chilean J. Agric. Res.

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Atrazine behavior during crop maize (Zea mays L.) production in soils of Argentine humid pampas was investigated. Lysimeters (3.3 x 3.3 x 1.4 m) with a Typic Argiudoll (Pergamino) and others with a Typic Hapludoll (Junín) were monitored for drainage water content and atrazine concentrations in soil and water. Soil profiles were sampled in four depths in three dates, and water drainage pooled in four periods. Most of atrazine loss in drainage occurred within 30 d of atrazine application being 0.13% and 0.03% of the total atrazine applied for Pergamino and Junín, respectively. Under laboratory conditions half-life average in both profiles was 16 d. Atrazine extractable residues (AER) in lysimeters showed differences in quantity and distribution between both profiles. Extractable residues were 25.7 (Pergamino) and 69.4 g ha-1 (Junín). At the 30 th day of application, AER represented 25% of total AER in Junín and 88% in Pergamino in the first 30 cm. Occurrence of preferential flow through the Bt horizon (Pergamino) may explain differences detected. High proportion of AER in Junín profile suggests low atrazine affinity and should be followed through time in order to evaluate actual stability of these residues and if they constitute a potential risk for aquifers.

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Mineralization of 14C-atrazine in an entic haplustoll as affected by selected winter weed control strategies

Cited by 11 publications

References 19 publications

Hybridized Nanowires and Cubes: A Novel Architecture of a Heterojunctioned TiO₂/SrTiO₃ Thin Film for Efficient Water Splitting

Hybridized Nanowires and Cubes: A Novel Architecture of a Heterojunctioned TiO₂/SrTiO₃ Thin Film for Efficient Water Splitting

Agronomic and environmental implications of enhanceds-triazine degradation

Integral Study of Atrazine Behaviour in Field Lysimeters in Argentinean Humid Pampas Soils

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Mineralization of 14C-atrazine in an entic haplustoll as affected by selected winter weed control strategies

Cited by 11 publications

References 19 publications

Hybridized Nanowires and Cubes: A Novel Architecture of a Heterojunctioned TiO2/SrTiO3 Thin Film for Efficient Water Splitting

Hybridized Nanowires and Cubes: A Novel Architecture of a Heterojunctioned TiO2/SrTiO3 Thin Film for Efficient Water Splitting

Agronomic and environmental implications of enhanceds-triazine degradation

Integral Study of Atrazine Behaviour in Field Lysimeters in Argentinean Humid Pampas Soils

Contact Info

Product

Resources

About

Hybridized Nanowires and Cubes: A Novel Architecture of a Heterojunctioned TiO₂/SrTiO₃ Thin Film for Efficient Water Splitting

Hybridized Nanowires and Cubes: A Novel Architecture of a Heterojunctioned TiO₂/SrTiO₃ Thin Film for Efficient Water Splitting