کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
606404 1454527 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Combination of Na-modified zeolite and anion exchange resin for advanced treatment of a high ammonia–nitrogen content municipal effluent
ترجمه فارسی عنوان
ترکیب زئولیت اصلاح شده با سدیم و رزین آنیونی برای درمان پیشرفته آمونیاک بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی

In this study, the exchange equilibrium and kinetic experiments of ammonia–nitrogen on the Na-form zeolite were conducted. The results indicated that the presence of humic acid have a negative effect on the equilibrium exchange capacity but have limited influence on the equilibrium time except shorten the sole intra-particle diffusion control time. The exchange equilibrium data could be well fitted by Freundlich model in the absence of humic acid but Langmuir model in the presence of humic acid. While the exchange kinetic data could be well described by pseudo-second-order kinetic model in both situations. An anion exchange resin exhibited high removal efficiency to humic acid and dissolved organic matter through kinetic results and fluorescence excitation-emission matrix (EEM) spectroscopy results. The use of the anion exchange resin prior to the Na-form zeolite improved the ammonia–nitrogen removal efficiency from 78% to 95% and increased the treatment volume of the Na-form zeolite from 51 BV (bed volume) to 76 BV. Both the resin and the Na-form zeolite could be successfully regenerated by the combination of alkaline and sodium chloride. Complete elution of ammonia–nitrogen was achieved when the mass percentage of sodium chloride and alkaline was 10% and 0.6% respectively.

The field experiments to treat bio-treated secondary effluent proved that the reduction of dissolved organic matter by the magnetic anion exchange resin improved the removal efficiency of ammonia–nitrogen by the zeolite.Figure optionsDownload high-quality image (129 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 468, 15 April 2016, Pages 128–135
نویسندگان
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