کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5765860 | 1627008 | 2017 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-situ atrazine biodegradation dynamics in wheat (Triticum) crops under variable hydrologic regime
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کلمات کلیدی
IPPNipAETACyAIPADEHAATZatrazine - آترازینALP - آلکالن فسفاتازethylamine - اتیلامینcyanuric acid - اسید سیانوریکIsopropanol - ایزوپروپانول، ایزوپروپیل الکلIsopropylamine - ایسپروپیلامینBiuret - بیورتSoil - خاکDeethylatrazine - دی اتیل اترازینDeisopropylatrazine - دیزوپروپیلاتراسینHerbicide - علف کشPersistence - ماندگاریBreakthrough curve - منحنی دستیابی به موفقیتAgriculture - کشاورزی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A comprehensive biodegradation reaction network of atrazine (ATZ) and its 18 byproducts was coupled to the nitrogen cycle and integrated in a computational solver to assess the in-situ biodegradation effectiveness and leaching along a 5 m deep soil cultivated with wheat in West Wyalong, New South Wales, Australia. Biodegradation removed 97.7% of 2 kg/ha ATZ yearly applications in the root zone, but removal substantially decreased at increasing depths; dechlorination removed 79% of ATZ in aerobic conditions and 18% in anaerobic conditions, whereas deethylation and oxidation removed only 0.11% and 0.15% of ATZ, respectively. The residual Cl mass fraction in ATZ and 4 byproducts was 2.4% of the applied mass. ATZ half-life ranged from 150 to 247 days in the soil surface. ATZ reached 5 m soil depth within 200 years and its concentration increased from 1 Ã10 â6 to 4 Ã10 â6 mg/kgdry-soil over time. The correlation between ATZ specific biomass degradation affinity Φ0 and half-life t1/2, although relatively uncertain for both hydrolyzing and oxidizing bacteria, suggested that microorganisms with high Φ0 led to low ATZ t1/2. Greater ATZ applications were balanced by small nonlinear increments of ATZ biodegraded fraction within the root zone and therefore less ATZ leached into the shallow aquifer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Contaminant Hydrology - Volume 203, August 2017, Pages 104-121
Journal: Journal of Contaminant Hydrology - Volume 203, August 2017, Pages 104-121
نویسندگان
Daniele la Cecilia, Federico Maggi,