| 胡春联,陈元涛,张炜,胡兰基.化学通报,2015,78(11):997-1005. |
| (英文)石棉尾矿酸浸渣作为一种吸附剂去除水溶液中的Co(II) |
| Acid leaching residue of asbestos tailings used as sorbent to remove Co(II) from aqueous solution |
| 投稿时间：2014-11-20 修订日期：2015-05-07 |
| DOI： |
| 中文关键词: 石棉尾矿 煅烧 酸浸渣 Co(II) 吸附 |
| 英文关键词:Asbestos tailing Calcination Acid leaching residue Cobalt Sorption |
| 基金项目:国家自然科学基金(20967006)、教育部“新世纪优秀人才”支持计划(NCET-07-0476) |
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| 中文摘要: |
| 本文采用XRD, FT-IR, SEM 和 BET等手段分别对石棉尾矿,石棉尾矿酸浸渣,以及煅烧的石棉尾矿酸浸渣进行表征。利用煅烧的石棉尾矿酸浸渣对Co(II)进行吸附研究。研究了吸附剂浓度、吸附时间、pH值和温度对Co(II)在磁性伊利石上吸附的影响,并采用Lagrange准二级动力学方程、Langmuir等温线方程、Freundlich等温线方程和D-R等温线方程对实验数据进行拟合。结果表明: pH值、离子强度和温度对Co(II)在煅烧的石棉尾矿酸浸渣上的吸附影响较大；Co(II)在煅烧的石棉尾矿酸浸渣上的吸附符合Lagrange准二级动力学方程；热力学符合Langmuir等温线方程,并且高温利于吸附。利用石棉尾矿作为吸附材料,是一个“以废治废”的工程。 |
| 英文摘要: |
| The asbestos tailing (AT), acid leaching residue of asbestos tailing (AAT) and calcined acid leaching residue of asbestos tailing (CAAT) were characterized by XRD, FT-IR, SEM and BET. The prepared CAAT was applied for the sorption of Co(II) from aqueous solutions, which was investigated as a function of contact time, solid content, pH, ionic strength and temperature. The results indicated that the pseudo-second-order rate equation fitted the kinetic model well. The sorption of Co(II) on CAAT was strongly dependent on pH, ionic strength and temperature. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models were used to simulate the sorption isotherms at three different temperatures of 293, 308 and 323K. The thermodynamic date (△Gθ, △Sθ, △Hθ) were calculated from the temperature dependent sorption isotherms and the results suggested that the sorption process of Co(II) on CAAT was an endothermic and spontaneous process. It is a project of recycling on hazardous materials to utilize scrapped AT. |
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