摘要
基于聚合硫酸铁的UV-vis光谱学特征,利用外加电磁场对聚合硫酸铁进行磁化调控,研究了不同磁化时间和磁场强度对PFS中铁形态分布的影响.研究表明,水解过程中铁盐逐渐与羟基结合,存在由低聚态向相对较高聚态转化的趋势.整体来看,在一定范围内增加磁化时间和磁场强度可以有效促进絮凝剂的水解,但是在多工艺参数调控中,提升磁场强度能够获得更为明显的效果.通过上述研究表明,借助UV-vis光谱学特征变化的分析,可有效判断PFS在水解过程中的水解进程及转化.在相同磁场强度下,磁化4~6min时,由低聚态向高聚态转化速率更快.而在控制磁化时间相同的情况下,增大磁场强度相应水解产物的转化速率也会提高1.9%~12.3%.该研究为设计适当的磁场强度获得更好的磁絮凝效果以及PFS絮凝工艺的调控提供更为科学有效的理论指导.
Based on the UV-vis spectroscopy characteristics of PFS, the magnetization of polyferric sulfate was controlled by external magnetic field. The effects of different magnetization time and magnetic field strength on the distribution of iron in PFS were studied. The results showed that the iron salt gradually combines with the hydroxyl group during the hydrolysis process, and the transition from the oligomeric state to the relatively high polymer state. On the whole, increasing the magnetization time and magnetic field strength within a certain range could effectively promote the hydrolysis of flocculants, moreover, magnetic field strength can achieve a more obvious effect on the process of multiple parameters operation. In the present paper, the flocculent conformation and qualities of polymer ferric sulfate flocculants were studied by the ultraviolet-visible spectrum. Under the same magnetic field strength, the conversion rate from the oligomeric state to the relatively high polymer state is faster when magnetization time is 4-6 min.Under the same magnetization time, the conversion rate of hydrolyzed products with magnetic field strength increased by 1.9% to 12.3%.By designing appropriate magnetic field to provide a more scientific and theoretical surpport for the regulation of PFS flocculation process.
作者
蔺能
石晓雪
袁媛
张金城
郭幸斐
贾辉
王捷
LIN Neng;SHI Xiao-xue;YUAN Yuan;ZHANG Jin-cheng;GUO xing-fei;JIA hui;WANG Jie(State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China;School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China;Beijing Zhongchuang Longyuan Environment Technolongy CO.LTD,Beijing 102600,China;Tianjin Engineering Center for Safety Evaluation of Water Quality&Safeguards Technology,Tiangong University,Tianjin 300387,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2020年第7期2978-2984,共7页
China Environmental Science
基金
国家自然科学基金资助项目(51978464,51638011)。
