کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5348705 | 1503634 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Material prepared from drinking waterworks sludge as adsorbent for ammonium removal from wastewater
ترجمه فارسی عنوان
مواد آماده شده از لجن آب آشامیدنی به عنوان جاذب برای حذف آمونیاک از فاضلاب
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کلمات کلیدی
لجن آب آشامیدنی آشامیدنی، جاذب آمونیاک، مبادله ایون، مشخصه سطح،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Drinking waterworks sludge (DWS) is not an effective adsorbent for ammonium removal without any treatment. In this study, DWS was used as a starting material to prepare ammonium adsorbent (M-DWS) by means of an ultrasonic assisted extraction and synthesis method. Two materials (M-DWS1# and M-DWS2#) were prepared according to two different routes. The composition, structure, and surface properties of DWS and M-DWS were characterized and their ammonium adsorption abilities were examined. Characterization results showed that the lamellar structure of DWS was converted into the spherical units of M-DWS and that the cation exchange capacity and specific surface area of M-DWS were many times higher than that of DWS. Batch test results indicated that the adsorption equilibrium data of M-DWS fitted well to both the Langmuir and Frendlich isotherms. The maximum adsorption capacity of M-DWS1# and M-DWS2# evaluated from the Langmuir isotherm was 6.11Â mg/g and 5.10Â mg/g, respectively. It was also observed that the initial pH affected ammonium adsorption on M-DWS greatly. Under an optimum pH of 7-8, the highest ammonium removal rate of 90% for M-DWS1# and 80% for M-DWS2# were achieved at an initial concentration of 50Â mg NH4+/L. The advantage of M-DWS2# lies in its higher yield and less waste discharge compared with M-DWS1#.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 330, 1 March 2015, Pages 228-236
Journal: Applied Surface Science - Volume 330, 1 March 2015, Pages 228-236
نویسندگان
Lan Yang, Jie Wei, Zhongyuan Liu, Jianli Wang, Dongtian Wang,