کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6353490 | 1622636 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stabilization/solidification of lead in MSWI fly ash with mercapto functionalized dendrimer Chelator
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
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![عکس صفحه اول مقاله: Stabilization/solidification of lead in MSWI fly ash with mercapto functionalized dendrimer Chelator Stabilization/solidification of lead in MSWI fly ash with mercapto functionalized dendrimer Chelator](/preview/png/6353490.png)
چکیده انگلیسی
This work compares the performance of stabilizing Pb by Sodium sulfide (Na2S), Sodium phosphate (Na3PO4), thiourea (H2NCSNH2), and mercapto functionalized dendrimer (TEPA-SNa) in MSWI fly ash, including leaching toxicity analysis and leaching behavior analysis, as a function of pH. The leaching toxicity in fly ash indicated that leaching value of Pb stabilized by Na2S, Na3PO4, and H2NCSNH2 has remained higher than the limit value (0.25Â mg/L) with a dosage of 10%. However, the leaching value associated with TEPA-SNa approaches zero at a dosage of 3%. The effective leaching test results showed the leaching amount of Pb stabilized by TEPA-SNa with a dosage of 3% to be 3.58Â mg/kg less than the maximum allowable amount of leaching (5Â mg/kg), but the amount of Pb leached by Na2S, Na3PO4, and H2NCSNH2 was much higher than 5Â mg/kg. The leaching behavior of Pb as a function of pH showed that the leaching concentration of Pb stabilized by TEPA-SNa can approach zero at a dosage of 5% no matter how the pH changes. In summary, TEPA-SNa can interact with Pb2+ in the acid-base environment and effectively immobilize Pb2+ in fly ash in the long term.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 50, April 2016, Pages 105-112
Journal: Waste Management - Volume 50, April 2016, Pages 105-112
نویسندگان
Bingru Zhang, Weixiao Zhou, Huangpu Zhao, Zhipeng Tian, Fengting Li, Yinan Wu,