کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6386382 1627029 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measuring the reactivity of commercially available zero-valent iron nanoparticles used for environmental remediation with iopromide
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Measuring the reactivity of commercially available zero-valent iron nanoparticles used for environmental remediation with iopromide
چکیده انگلیسی
Iopromide was rapidly dehalogenated by the investigated nZVI particles, following pseudo-first-order reaction kinetics that was independent of the experimental conditions. The specific surface area normalized reaction rate constant (kSA) value in the batch reactors ranged between 0.12 and 0.53 L m− 2 h− 1; it was highest for the uncoated Nanofer 25 particles, followed by the polyacrylic acid-coated Nanofer 25S and air-stable Nanofer Star particles. In the batch reactors all particles were less reactive in natural water than in synthetic water. The kSA values derived from the column reactor experiments were about 1000 times lower than those from the batch reactors, ranging between 2.6 × 10− 4 and 5.7 × 10− 4 L m− 2 h− 1. Our results revealed that the easy-to-handle and air-stable Nanofer Star particles are the least reactive of all the Nanofer products tested. The reaction kinetics predicted by column experiments were more realistic than those predicted by batch experiments and these should therefore be used when designing a full-scale field application of nanomaterials for environmental remediation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Contaminant Hydrology - Volume 181, October 2015, Pages 36-45
نویسندگان
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