کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5751412 1619712 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fast and slow adsorption of carbamazepine on biochar as affected by carbon structure and mineral composition
ترجمه فارسی عنوان
جذب سریع و آهسته کاربامازپین بر روی زیست تخریب تحت تاثیر ساختار کربن و ترکیبات معدنی
کلمات کلیدی
سینتیک جذب، ایزوترم جذب، کربن سست کربن چگال ترکیب مواد معدنی، آلاینده های آلی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Hydrophobic and π-π interactions are the dominated adsorption mechanism of CBZ on biochar.
- The fast adsorption of CBZ is attributed to the loose carbon and minerals of biochar.
- The slow adsorption of CBZ is attributed to the condensed carbon of biochar.
- The hydrogen bonds between CBZ and -OH on minerals are likely the fast adsorption mechanism.

The influence of carbon structure and mineral composition of biochar on fast adsorption and slow adsorption of ionic organic contaminants (IOCs) is still unclear. This study used carbamazepine (CBZ) as adsorbate, peanut-shell-derived biochars produced at different charred temperatures, and the corresponding acid-washed biochars as adsorbents, to investigate the adsorption kinetics as affected by carbon structure and mineral composition of biochar. The adsorption of CBZ on amorphous (loose) carbon was lower than aromatic (condensed) carbon, but the former mainly contributed to the fast adsorption of CBZ. The hydrophobic and π-π interactions were likely the predominant adsorption mechanisms of CBZ on biochar. The ratio of CBZ fast and slow adsorption fractions (ffast/fslow) significantly reduced after acid-wash treatment of the biochars. The X-ray diffraction and Fourier transform infrared spectra indicated that minerals, including CaCO3, KAlO2, and quartz, were likely responsible for the fast adsorption of CBZ by the hydrogen bonds between CBZ and -OH on the surface of minerals. These results are useful for better understanding of the environmental behavior and prediction of the environmental risks of IOCs in biochar-amended soils.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 579, 1 February 2017, Pages 598-605
نویسندگان
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