研究论文
栾兆坤,冯利,汤鸿霄.水解聚合铝溶液中形态分布的定量模拟研究[J].环境科学学报,1995,15(1):39-47
水解聚合铝溶液中形态分布的定量模拟研究
- STUDIES ON QUANTITATIVE MODEL FOR SPECIES DISTRIBUTION OF HYDROXY POLYALUMINUM CHLORIDE
- 基金项目：国家自然科学基金
- 作者
- 单位
- 栾兆坤
- 中国科学院生态环境研究中心,北京 100085
- 冯利
- 中国科学院生态环境研究中心,北京 100085
- 汤鸿霄
- 中国科学院生态环境研究中心,北京 100085
- 摘要：通过Al-Ferron逐时络合比色法和27Al核磁共振(NMR)法,并应用“MINEQL”化学平衡模式计算法,对采用不同反应途径制得的聚合铝(PAC)溶液中的化学形态分布规律进行了定量模拟研究和对比。模式计算结果与两种实验定量分析结果都较为吻合,结果表明,在水解聚合铝溶液中较稳定的化学形态主要有五种：一种单体形态[Ala],即Al3+,Al(OH)2+,Al(OH)2+;3种
- Abstract：The species distribution of hydroxy polyaluminum chloride(PAC,Al=0.1 mol/L)so-lutions preparde through two different types of base infection was studied and comparedquantitatively by Al-Ferron timed complex colorimetric method and 27AL NMR spec-troscopy,and their was simulated hy using a quantitative calculating procedure of chemicalequilibrium in MINEQL model. The results suggest that methodology of synthesis is veryimportant for determining species distribution in the preparation of PAC solutions. In the PAC solution prepared by micro-injection of base, it contains at least five species including amonomeric species,Al3+, three polymeric species, and and an aggregate of Al13 or a solid phase, Al(OH)3(aq),whereas in the PAC solution prepared by instantaneous injection of base,it contains four sp-ceies including a monomeric species, Al3+,two polymeric species,and and a solid phase, Al(OH)3(am). The change of species distribu-tion in the PAC solutions depends on B (OH/Al) value and their concentration.
摘要点击次数： 1856 全文下载次数： 2133
