CAJ | 학술논문

采用改进的Al-Fe-Ferron逐时络合比色法定量研究了HPAFC的化合形态分布与转化,结合酸解聚实验和酸反滴定实验结果,描述了其形态分布特征.结果表明HPAFC的化合形态主要决定于n(Al):n(Fe)比值、碱度值和陈化时间,并且可划分成三个主要化合形态分布区,即单体和二聚体[Al+Fe]a、中间多核羟基络合物[Al+Fe]b和溶胶态[Al+Fe]c,而且它们之间可相互直接转化.当n(Al):n(Fe)＞5:5时,[A1+Fe]a和[A1+Fe]b为主要化合形态;除了[A1+Fe]b之外,[Al+Fe]a和[Al+Fe]c随n(Al):n(Fe)减小而增大.最后提出了HPAFC的化合形态分布与转化模型.
채용개진적Al-Fe-Ferron축시락합비색법정량연구료HPAFC적화합형태분포여전화,결합산해취실험화산반적정실험결과,묘술료기형태분포특정.결과표명HPAFC적화합형태주요결정우n(Al):n(Fe)비치、감도치화진화시간,병차가화분성삼개주요화합형태분포구,즉단체화이취체[Al+Fe]a、중간다핵간기락합물[Al+Fe]b화용효태[Al+Fe]c,이차타문지간가상호직접전화.당n(Al):n(Fe)＞5:5시,[A1+Fe]a화[A1+Fe]b위주요화합형태;제료[A1+Fe]b지외,[Al+Fe]a화[Al+Fe]c수n(Al):n(Fe)감소이증대.최후제출료HPAFC적화합형태분포여전화모형.
The species distribution and transformation of typical Hydroxyl Polymeric Aluminum-Ferric Chloride (HPAFC) was investigated by the improved A1-Fe-Ferron methods in conjunction with the acid depolymerization methods and the acid reverse titration methods under the condition that the ratios of n(Al):n(Fe) of HPAFC were 9:1 and 5:5. The results show that the species distribution mainly depended upon n(Al):n(Fe), basicity (B) and aging time. The HPAFC can be classified into three kinds of major species such as {Al+Fe}a, {Al+Fe}b and {Al+Fe}c, which could transform each other directly. When the n(Al):n(Fe) of HPAFC was more than 5:5, the {Al+Fe}a and the {Al+Fe}b became dominant species with the increase of the B value; the [Al+Fe]a and [Al+Fe]c content except [Al+Fe]b increased with the decrease of n(Al):n(Fe). A species distribution and transformation model for HPAFC is proposed also in this paper.