کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4390503 | 1305177 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phosphorus fixation in lake sediments using LaCl3-modified clays
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Fourteen types of clay, including soils and sediments from Lake Taihu, were modified by LaCl3, and their abilities of phosphorus (P) sorption (the total P up-taken) and fixation (the unleachable P retained in modified clays) were investigated. Results showed that P sorption rates of LaCl3-modified clays were all higher than 90%, while the fixation rates were raised from 3-14% to 52-95%. Kaolinite was selected to study the pH effect on P sorption and desorption of La3+ from the modified clays. In the pH range of 4-8, P sorption on LaCl3-modified kaolinite could reach over 80%, with a maximum of 97% at pH 5. The desorption rate of La3+ decreased with the increase of pH, which was lower than <0.006% at pHÂ >Â 6.12. This study may provide a solution for internal P pollution from lake sediments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Engineering - Volume 35, Issue 11, November 2009, Pages 1599-1602
Journal: Ecological Engineering - Volume 35, Issue 11, November 2009, Pages 1599-1602
نویسندگان
Xian-Zheng Yuan, Gang Pan, Hao Chen, Bing-Hui Tian,