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篇目详细内容 |
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【篇名】 |
Adsorption of reactive brilliant red K-2BP on activated carbon developed from sewage sludge |
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【刊名】 |
Frontiers of Chemistry in China |
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【刊名缩写】 |
Front. Chem. China |
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【ISSN】 |
1673-3495 |
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【EISSN】 |
1673-3614 |
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【DOI】 |
10.1007/s 11458-008-0014-3 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2008 |
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【卷期】 |
3
卷1期 |
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【页码】 |
33-40
页,共
8
页 |
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【作者】 |
XIE Jiankun;
YUE Qinyan;
YU Hui;
YUE Wenwen;
LI Renbo;
ZHANG Shengxiao;
WANG Xiaona;
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【关键词】 |
activated carbon developed from sewage sludge (ACSS); reactive brilliant red K-2BP; dye adsorption; adsorption kinetics; adsorption thermodynamics |
【摘要】 |
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Activated carbon was prepared from the sewage sludge of municipal wastewater treatment plant by chemical activation (activation reagent is ZnCl2) and was used for the adsorption of dye (reactive brilliant red K-2BP). The impact of adsorbent amount, adsorption time and pH value on adsorption effect, the adsorption kinetics, and the adsorption thermodynamics were discussed according to batch adsorption tests. The results indicated that the activated carbon developed from sewage sludge (ACSS), which was mesoporous, possessed opened porous structures. The iodine number of the ACSS was 326 mg·g-1. The rate of achievement was 51.31%. The BET surface area was 298 m2·g-1 and the contents of heavy metals in the leachate didn’t exceed the contents limit. The adsorption kinetics of reactive brilliant red K-2BP on the ACSS was accorded with the two-step kinetics rate equation and pseudo-second-order kinetics equation. Compared to the Freundlich isotherm equation, the Langmuir isotherm equation showed better applicability for the adsorption. The adsorption which was favorable was an endothermic (enthalpy ΔH > 0) and spontaneous (free energy ΔG < 0) process and was accompanied by an increase in entropy (ΔS > 0). |
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