摘要
Al30是新发现的有确切结构的由30个Al原子聚合组成的高聚铝，并被认为是一种混凝优势形态，然而有关高Al30含量絮凝剂生产技术参数非常缺乏，为明确有关影响，主要运用^27Al NMR手段研究各类聚合铝（polyaluminum chloride，PAC）溶液在高温条件下的转化反应及转化后的形态，结果表明，高温条件下Al13转化生成了Al30，熟化的PAC比不熟化PAC有更高的转化率，高纯Al13的转化过程中发现有Al14但掺人单体铝后Al14消失，PAC碱化度控制在2．0～2．4之间、A113聚集体碱化度控制在2．6以下以及商业聚合铝的稀释和熟化处理等有利于Al13向Al30的转化。n（Si）／n（Al）=0．05时有最佳的Al30生成。
Al30 as a new kind of aluminum species with 30 aluminum atoms is believed to be a new optimum coagulation species just as Al13. But the technical parameters of high content of Al30 product is absent, to clear the influence of parameters on the product, the species transformation in polyaluminum chloride （PAC） under high temperature circumstance was studied by^ 27 Al NMR. Results show that Al30 transforms from Al13 under high temperature circumstance. Al30 production in PAC with aging is found higher than that in PAC without aging. In Al13 solution with high purity, Al14 can be found in the process of Al30 formation whereas it can not be found as monomeric A1 is added. Those parameters, such as PAC with basicities of 2.0 to 2.4, Al13 aggregates with basicities below 2.6, dilution followed by aging of commercial PAC, could facilitate Al30 transformation from AI,3. The optimum n（Si）/n（Al） for A130 preparation is 0.05.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第6期73-77,82,共6页
Environmental Science & Technology
基金
国家自然科学基金项目(50948055
51078348)
南通大学人才引进项目(12R026
12R027)
南通市科技计划(BK2013037)
