کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
580525 | 1453153 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Leaching behaviour of magnesium phosphate cements containing high quantities of heavy metals
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کلمات کلیدی
W/STCLPCBPCS/SANCL/S - L / SLeaching test - آزمایش لیش کردنELT - آموزش زبان انگلیسیStabilization/solidification - تثبیت / انجمادToxicity characteristic leaching procedure - روش شستشو مشخصه سمیHazardous wastes - زباله های خطرناکMagnesium potassium phosphate cement - سیمان فسفات پتاسیم منیزیمinductively coupled plasma-mass spectrometry - طیف سنجی جرم پلاسما به صورت القاییICP-MS - طیفسنجی جرمی پلاسمای جفتشده القاییacid neutralization capacity - ظرفیت خنثی سازی اسیدHeavy metals - فلزات سنگینXRD - پراش اشعه ایکسX-ray diffraction - پراش اشعه ایکس
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Stabilization/solidification (S/S) is one of the most employed techniques for treating liquid wastes containing heavy metals. Magnesium potassium phosphate cements have been used in recent years as stabilizing agents with positive results. However, little information is available about the retention of the metals by magnesium potassium phosphate cements matrices with the exception of the results of compliance tests. In this work, several pastes were prepared by reaction between low grade MgO and KH2PO4 in the presence of different heavy metal nitrate solutions (containing Cd(II), Cr(III), Cu(II), Ni(II), Pb(II) or Zn(II)). In all cases, the initial metal content of the dissolution was 25 g dmâ3 and the oxide-phosphate ratio of the pastes was (50:50) in weight. Four different leaching tests were conducted on magnesium potassium phosphate cement pastes: simple batch test (EN 12457-2), equilibrium leaching test, availability test (NEN 7371) and acid neutralization capacity test (ANC). The metal leachate concentration was determined by means of ICP-MS. The stabilization of metals was successful in all cases, although the immobilizing system shows a better behaviour for Pb(II) and Cr(III) under acidic or neutral conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 175, Issues 1â3, 15 March 2010, Pages 789-794
Journal: Journal of Hazardous Materials - Volume 175, Issues 1â3, 15 March 2010, Pages 789-794
نویسندگان
Irene Buj, Josep Torras, Miquel Rovira, Joan de Pablo,