| 利用X射线吸收近边结构光谱(XANES)研究水泥窑共处置产品中Ni和Cd的微观组成 |
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| 引用本文： | 薛靖川,黄启飞,杨玉飞.利用X射线吸收近边结构光谱(XANES)研究水泥窑共处置产品中Ni和Cd的微观组成[J].环境科学学报,2011,31(11):2518-2522. |
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| 作者姓名： | 薛靖川 黄启飞 杨玉飞 |
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| 作者单位： | 1. 中国环境科学研究院,北京,100012
2. 中国环境科学研究院,北京100012／北京科技大学土木与环境工程学院,北京100083／浙江工业大学浙西分校,衢州324000 |
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| 基金项目： | 国家"十一五"科技支撑计划项目(No.2007BAC16B03,2006BAC02A19) |
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| 摘 要： | 在模拟水泥窑中高温煅烧掺有Ni、Cd化学试剂的水泥生料,并由制取的水泥熟料制备水泥净浆片.利用X射线吸收近边结构光谱（XANES）对水泥窑共处置产品中Ni、Cd的微观组成进行了研究.结果表明：Ni在水泥窑煅烧过程中发生了较为彻底的化学变化,形成了Ni-Mg化合物,该化合物可能是以氧化物、氢氧化物或碳酸盐的形式存在;水泥...
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| 关 键 词： | 水泥窑共处置产品 X射线吸收近边结构光谱(XANES) 重金属 微观组成 |
| 收稿时间： | 1/9/2011 12:00:00 AM |
| 修稿时间： | 2011/3/16 0:00:00 |
Microscale investigation of Ni and Cd in co-processed cement products using X-ray absorption near edge structure spectroscopy |
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| XUE Jingchuan,HUANG Qifei and YANG Yufei.Microscale investigation of Ni and Cd in co-processed cement products using X-ray absorption near edge structure spectroscopy[J].Acta Scientiae Circumstantiae,2011,31(11):2518-2522. |
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| Authors: | XUE Jingchuan HUANG Qifei and YANG Yufei |
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| Institution: | Chinese Research Academy of Environmental Sciences,Beijing 100012,Chinese Research Academy of Environmental Sciences,Beijing 100012 and 1. Chinese Research Academy of Environmental Sciences,Beijing 100012;2. Civil and Environment Engineering School, University of Science & Technology Beijing, Beijing 100083;3. Zhejiang University of Technology Zhexi Branch, Quzhou 324000 |
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| Abstract: | A high-temperature calcination simulation in cement kiln was carried out to acquire clinker from heavy metals contained hazardous waste co-processing. The compositions of Ni and Cd compounds in the clinker and cement paste made from clinker were studied using X-ray absorption near edge structure (XANES). Significant change of Ni compounds in calcinations process was found. Different from Ni compounds added to raw material, most of Ni in clinker existed as oxides, hydroxides or carbonates Ni-Mg compound in the clinker. Little difference was found between the composition of Ni compounds in the cement paste and that in the clinker. It indicated that Ni-Mg compound changed little in hydration process. Cd in cement paste mainly existed as CdSO4, CdO, and CdCO3. The percentage of CdSO4, CdO and CdCO3 was 42.4%, 40.4% and 17.1%, respectively. The Cd coumpounds in cement paste may be adsorbed by Ca(OH)2 crystals or imbedded in Ca(OH)2 crystals with low leachability. |
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| Keywords: | co-processed products in cement kiln X-ray absorption near edge structure (XANES) heavy metals microscale investigation |
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