کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5750441 1619697 2017 8 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله
Comparative study on pharmaceuticals adsorption in reclaimed water desalination concentrate using biochar: Impact of salts and organic matter
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Comparative study on pharmaceuticals adsorption in reclaimed water desalination concentrate using biochar: Impact of salts and organic matter
چکیده انگلیسی


- Limited option of concentrate management is a barrier for water reuse & desalination.
- Biochar is a promising alternative adsorbent for organic contaminants removal.
- Biochar with larger surface area and pore volume has higher adsorption capacity.
- High ionic strength in concentrate increases ibuprofen & sulfamethoxazole removal.
- Carbonate species and organic matter hinder ibuprofen & sulfamethoxazole removal.

The synergistic impact of salts and organic matter on adsorption of ibuprofen and sulfamethoxazole by three types of biochar and an activated carbon was investigated using reclaimed water reverse osmosis (RO) concentrate and synthetic solutions spiked with target organic compounds and non-target water constituents (e.g., Na+, Ca2 +, Mg2 +, K+, Cl−, SO42 −, alkalinity, humic acid (HA), and bovine serum albumin (BSA)). Kinetic modeling was used to better understand the adsorption process between the carbon adsorbents and pharmaceuticals and to elucidate the impact of water chemistry on pharmaceuticals adsorption. The adsorption capacity of pharmaceuticals by biochar was affected by their physicochemical properties including ash content, specific surface area, charge, pore volume, as well as hydrophobicity, π-energy, and speciation of pharmaceuticals. The adsorption of pharmaceuticals in concentrate was pH-dependent, the kinetic rate constant increased with deceasing pH due to the electrical interactions between pharmaceutical molecules and adsorbents. High salinity and electrolyte ions in RO concentrate improved adsorption, whereas the presence of carbonate species, HA, and BSA hindered the removal of ibuprofen and sulfamethoxazole. This study revealed the correlation of concentrate water quality on adsorption of pharmaceuticals by biochar and activated carbon. Biochar provides a promising alternative to activated carbon for removal of organic contaminants of emerging concerns in various wastewater and concentrate streams.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 601–602, 1 December 2017, Pages 857-864
نویسندگان
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