کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
623295 | 1455344 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneous removal of ammonium and phosphate from eutrophic waters using natural calcium-rich attapulgite-based versatile adsorbent
ترجمه فارسی عنوان
حذف همزمان آمونیاک و فسفات از آب های یوتروفیک با استفاده از جاذب های چند منظوره مبتنی بر اتپوگلیفت طبیعی با کلسیم طبیعی
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
In this study, natural calcium-rich attapulgite (NCAP) was used to develop a versatile adsorbent for simultaneous removal of ammonium and phosphate from contaminated waters. Batch studies indicated that a combination of mixed salts and thermal treatments imparted the modified NCAP (named NCAP-NM) with the maximum nitrogen and phosphorus sorption capacity. This versatile adsorbent displayed a very fast nutrient adsorption rate and can, after 1 h of adsorption, lower a solution enriched with 20 mg/L of nutrients to < 0.01 mg P/L and 0.354 mg N/L with a dosage of 30 g/L. Fixed column adsorption studies indicated that sorption of phosphate was predominately affected by HCO3â, while sorption of ammonium was predominately affected by Ca2 +. The result of a real-world application indicated that NCAP-NM could purify 1440 and 1000 bed volumes of water for phosphate and ammonium, respectively, in eutrophic river water treatment. While SEM-EDS and XPS analysis confirmed a dual function in the nutrient removal process utilizing NCAP-NM where phosphate was removed through precipitation by calcium, and ammonium was exchanged with magnesium and sodium in the adsorbent. These results offer a promising new method for lake eutrophication control if NCAP-NM is used as the adsorbent for nitrogen and phosphorus removal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 351, 15 October 2014, Pages 128-137
Journal: Desalination - Volume 351, 15 October 2014, Pages 128-137
نویسندگان
Hongbin Yin, Ming Kong,