利用磷酸镁水泥对Pb2＋、Zn2＋、Cu2＋重金属硝酸盐进行固化,研究其浸出率变化规律,并对不同种类重金属对磷酸镁水泥水化产物种类、形貌及其微区元素进行了探讨.研究表明,磷酸镁水泥对重金属进行固化效果Pb2＋＞Cu2＋＞Zn2＋,浸出毒性数值远低于国家标准要求.Pb2＋促进了水化产物的生成,Cu2＋和Zn2＋抑制水化.采用 EDS 能谱分别检测水化产物中Pb、Zn和Cu,分析磷酸镁水泥对重金属硝酸盐稳定/固化效果.
The leaching rate of magnesium phosphate cement with Pb2+,Zn2+,Cu2+ were studied.The kind, morphology and micro area elements of hydration products of magnesium phosphate cement added heavy met-als,were discussed in this paper.Research shows that:the magnesium phosphate cement on heavy metal solidi-fication effect of Pb2+>Cu2+> Zn2+,while the value of leaching toxicity was far lower than the national stand-ard requirements.Pb2+ could promote the formation of hydration products,while Cu2+ and Zn2+ were opposite. Pb,Cu and Zn were respectively detected used the EDS spectrum detection,which was proved that it cans or not stabilization/solidification of heavy metals in the hydration products of magnesium phosphate cement.
参考文献
| [1] | 赖振宇,钱觉时,卢忠远,李倩,邹秋林.不同温度处理对磷酸镁水泥性能的影响[J].功能材料,2012(15):2065-2070. |
| [2] | Ding Zhu;Li Zongjin .High early strength phosphate ce-ment with fly ash[J].ACI MATERIALS JOURNAL,2005,102(06):375-381. |
| [3] | 蒋江波,薛明,汪宏涛,曹巨辉.海工磷酸镁水泥基材料的制备及性能研究[J].功能材料,2012(07):828-830,834. |
| [4] | A. S. Wagh;R. Strain;S. Y. Jeong;D. Reed;T. Krause;D. Singh .Stabilization of Rocky Flats Pu-contaminated ash within chemically bonded phosphate ceramics[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,1999(3):295-307. |
| [5] | 李东旭,李鹏晓,冯春花.磷酸镁水泥耐水性的研究[J].建筑材料学报,2009(05):505-510. |
| [6] | Leaching behaviour of magnesium phosphate cements containing high quantities of heavy metals[J].Journal of hazardous materials,2010(1/3):789. |
| [7] | Stabilization and solidification of Pb in cement matrices[J].Journal of hazardous materials,2010(1/3):507. |
| [8] | Leaching behaviour of magnesium phosphate cements containing high quantities of heavy metals[J].Journal of hazardous materials,2010(1/3):789. |
| [9] | 赖振宇,钱觉时,卢忠远,李倩.磷酸镁水泥固化模拟放射性焚烧灰[J].硅酸盐学报,2012(02):221-225. |
| [10] | A. Covill;N. C. Hyatt;J. Hill .Development of magnesium phosphate cements for encapsulation of radioactive waste[J].Advances in Applied Ceramics,2011(3):151-156. |
| [11] | 丁铸,李宗津.早强磷硅酸盐水泥的制备和性能[J].材料研究学报,2006(02):141-147. |
| [12] | 李鹏晓,杜亮波,李东旭.新型早强磷酸镁水泥的制备和性能研究[J].硅酸盐通报,2008(01):20-25. |
| [13] | 陈兵,雒亚莉,王菁.磷酸镁水泥性能试验研究[J].水泥,2010(07):14-18. |
| [14] | 聂永丰.三废处理工程技术手册(固体废物卷)[M].北京:化学工业出版社,2000 |
| [15] | Eighmy T T;Eusden Jr J D.Phosphate stabilization of MSW combustion residues[M].USA:Geochemical Prin-ciples,2004 |
| [16] | Choon Keun Park .Hydration and solidification of hazard-ous wastes containing heavy metals using modified ce-mentations materials[J].Cement and Concrete Re-search,2000,30:429-435. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%