کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
579408 | 1453139 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sorption of arsenite and arsenate on ferrihydrite: Effect of organic and inorganic ligands
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Sorption of arsenite and arsenate on ferrihydrite: Effect of organic and inorganic ligands Sorption of arsenite and arsenate on ferrihydrite: Effect of organic and inorganic ligands](/preview/png/579408.png)
چکیده انگلیسی
We studied the sorption of As(III) and As(V) onto ferrihydrite as affected by pH, nature and concentration of organic [oxalic (OX), malic (MAL), tartaric (TAR), and citric (CIT) acid] and inorganic [phosphate (PO4), sulphate (SO4), selenate (SeO4) and selenite (SeO3)] ligands, and the sequence of anion addition. The sorption capacity of As(III) was greater than that of As(V) in the range of pH 4.0-11.0. The capability of organic and inorganic ligands in preventing As sorption follows the sequence: SeO4 â SO4 < OX < MAL â TAR < CIT < SeO3 âªÂ PO4. The efficiency of most of the competing ligands in preventing As(III) and As(V) sorption increased by decreasing pH, but PO4 whose efficiency increased by increasing pH. In acidic systems all the competing ligands inhibited the sorption of As(III) more than As(V), but in alkaline environments As(III) and As(V) seem to be retained with the same strength on the Fe-oxide. Finally, the competing anions prevented As(III) and As(V) sorption more when added before than together or after As(III) or As(V).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 189, Issues 1â2, 15 May 2011, Pages 564-571
Journal: Journal of Hazardous Materials - Volume 189, Issues 1â2, 15 May 2011, Pages 564-571
نویسندگان
Jun Zhu, Massimo Pigna, Vincenza Cozzolino, Antonio G. Caporale, Antonio Violante,